EP3253505B1 - Method and apparatus for embossing rolling metal strip - Google Patents
Method and apparatus for embossing rolling metal strip Download PDFInfo
- Publication number
- EP3253505B1 EP3253505B1 EP16701520.5A EP16701520A EP3253505B1 EP 3253505 B1 EP3253505 B1 EP 3253505B1 EP 16701520 A EP16701520 A EP 16701520A EP 3253505 B1 EP3253505 B1 EP 3253505B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roll
- strip
- rolling
- work
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005096 rolling process Methods 0.000 title claims description 92
- 238000000034 method Methods 0.000 title claims description 41
- 238000004049 embossing Methods 0.000 title claims description 23
- 229910052751 metal Inorganic materials 0.000 title description 5
- 239000002184 metal Substances 0.000 title description 5
- 230000003746 surface roughness Effects 0.000 claims description 22
- 230000008859 change Effects 0.000 claims description 21
- 238000005259 measurement Methods 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 1
- 235000019592 roughness Nutrition 0.000 description 19
- 239000000314 lubricant Substances 0.000 description 17
- 238000012876 topography Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002393 scratching effect Effects 0.000 description 2
- 239000013543 active substance Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 210000003660 reticulum Anatomy 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 235000019587 texture Nutrition 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/227—Surface roughening or texturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/14—Guiding, positioning or aligning work
- B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B2013/021—Twin mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/14—Roughness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/14—Reduction rate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/24—Forming parameters asymmetric rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/005—Rolls with a roughened or textured surface; Methods for making same
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
- B21B45/0245—Lubricating devices
- B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
- B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
Definitions
- the invention relates to a method for embossing a strip with a roll stand comprising a first work roll and a second work roll, wherein between the first work roll and the second work roll, a roll gap is defined with a pass line. Furthermore, the invention relates to a device for embossing a strip, in particular for carrying out a method according to the invention, comprising a rolling stand having a first work roll and a second work roll, wherein between the first work roll and second work roll, a roll gap is defined with a pass line.
- Rolld strips and sheets can be provided with a certain surface structure during the production in a final rolling pass, in particular a last cold-rolled pass.
- a roll stand is used, wherein at least one of the work rolls of the roll stand has a defined surface structure, which is introduced by the rolling pass in the surface of the strip or sheet.
- Such a surface structure can prepare the tape or the sheet for a certain further processing.
- automotive industry but also in other applications, such as aircraft or rail vehicle construction plates are required, which have a very good forming behavior and allow high degrees of deformation.
- automotive engineering typical applications are the body and chassis parts.
- visible, painted components for example exterior body panels
- it is necessary that the forming of the materials must be carried out in such a way that the surface after painting is not impaired by defects such as flow patterns or roping. This is particularly important, for example, for the use of metal sheets for the production of bonnets and other body parts of a motor vehicle.
- the embossing stitch also changes the forming behavior of the tape with the specific surface structure introduced by the embossing roll stitch, i. the resulting by the embossing rolling pattern, favorably influenced.
- the surface structure of the strip introduced during rolling down, for example, the friction between the sheet metal and the forming tool.
- the surface structure is preferably formed so that the sheet can be better wetted with lubricants during forming.
- the surface may have depressions in the form of lubrication pockets, which can absorb lubricants. As a result, the friction forces during forming are further reduced and higher degrees of deformation are possible.
- the surface structure of the strip or the rolling pattern there must be a possibility to adjust the surface structure of the strip or the rolling pattern.
- embossing rolling with small Stichabnce it is particularly difficult to ensure a consistently uniform embossing of the surface structure of the work rolls, especially on both sides of the strip.
- the work rolls of the roll stand are subject to wear and thus have a surface structure which changes over time during operation.
- the surface structure of the work rolls over time the material of the tape or impurities record and thereby produce a variable over time rolling pattern.
- the band which is fed to the rolling stand is usually subject to fluctuations, making it difficult to achieve a uniform rolling pattern.
- the supplied tape may for example vary in dimensions such as the thickness, the width or the curvature or the profile or in the strength, which in turn can vary the rolling pattern during rolling.
- the present invention is therefore based on the technical problem of specifying a method and an apparatus for rolling, in which the surface structure of a band on the top and bottom can be controlled reliably and the disadvantages of the prior art can be avoided.
- This technical problem is solved according to a first technical teaching of the present invention by a method for rolling a strip in that a control roller in the rolling direction in front of the nip of the work rolls is arranged, the tape on the control roller at an entrance angle ⁇ relative to the pass line in the nip the roll stand is guided and the surface structure of the belt is controlled by the choice of the inlet angle ⁇ depending on the positioning of the control roller relative to the pass line.
- the rolling mill used in the method according to the invention comprises a first work roll and a second work roll.
- the work rolls contact the belt during performance of the process, for example, the first work roll is in contact with the top of the belt and the second work roll is in contact with the bottom of the belt.
- At least one of the work rolls has a structured surface.
- a cold roll pass is made with the roll stand.
- a lubricant is used in rolling in the roll stand.
- the two work rolls are used axially parallel.
- the axes of rotation are then parallel to one another and together with perpendicular to the axes of rotation arranged connecting lines between the axes of rotation of the outlet plane of the roll gap.
- the strip is guided via a control roller into the nip of the roll stand.
- the entry angle ⁇ is changed, thereby controlling the embossing of the surface structure on the belt.
- a change in the entry angle ⁇ via the positioning of a control roller is a simple and process-reliable way of controlling the surface structure of the strip in an embossing roll pass.
- the roll pass can be adjusted with respect to the desired surface structure via a change in the entry angle ⁇ , without the rolling stand being changed or other devices located in front of the rolling stand, such as run-out rolls, having to be adjusted specifically for a change in the entry angle ⁇ .
- the roll pattern can be kept uniform by regulating the entry angle ⁇ through the control roller.
- simple work rolls without a bending device can be used to change the rolled section.
- two work rolls with unequal surface roughness can be used to make a tape with equal surface roughness on both sides.
- a positionable control roller can be retrofitted into an existing rolling mill and thus the range of application of the existing rolling train can be easily expanded.
- the hydrodynamic intake is the dominant contribution to the lubricant intake. This is dependent on the contact angle between the surface of the respective work roll with the surface of the belt.
- the inlet angle ⁇ of the contact angle of the work roll and thus the hydrodynamic lubricant intake can be changed.
- by changing the angle of entry influence on the rolling pattern of the top and bottom of the tape can be taken, for example, to achieve a uniform rolling pattern on both sides and to respond to different surface structures and different wear of the surface structure of the two work rolls.
- ⁇ h the difference between the thickness of the strip before rolling and the thickness of the strip after rolling in mm (reduction in the number of passes)
- DW the diameter of the working roll (2, 4) in mm.
- an entry angle ⁇ greater than the gripping angle ⁇ arccos [1- ( ⁇ h / Dw)] of a work roll is set, where ⁇ h is the difference between the thickness of the strip before rolling and the thickness of the strip after Rolls in mm (reduction of stitches) and Dw is the diameter of the work roll in mm.
- embossing rolls are usually smaller Stichstrance .DELTA.h provided, whereby the gripping angle ⁇ is correspondingly small.
- the rolling image changes when changing the entry angle ⁇ only on a first side of the strip, since the other side is in contact with the work roll with a contact angle above the gripping angle.
- the rolling image of the second side of the band can be adjusted virtually independently of the first page via a change in the feed angle ⁇ . Consequently, in this embodiment, in particular, a uniform rolling pattern can be provided on both sides of the belt with a simplified control.
- the entry angle ⁇ is changed in 0.1 ° increments, particularly preferably in 0.05 ° increments, so that a very precise influencing of the surface roughness of the top and bottom of the band can take place.
- the surface topography of rolled strips is mainly dependent on the surfaces of the work rolls. However, the surface roughness of the two work rolls may be different.
- the properties of a surface topography can be determined by different characteristics.
- one-dimensional profiles Z (x) are measured by linear scanning in various places on the surface and the corresponding value R a is determined.
- the value for S a results from a two-dimensional measurement of the surface, ie the topography Z (x, y).
- the roughness R a or S a of the surfaces of the work rolls may, for example, in the range of at least 0.1 microns to a maximum of 10.0 microns, preferably at least 0.4 microns to a maximum of 4.0 microns, more preferably at least 0.6 microns to maximum 3.0 microns.
- the difference in the roughness Ra or Sa of the surfaces of the work rolls can amount to more than 0.1 ⁇ m, in particular more than 0.3 ⁇ m, in particular in connection with an entry angle ⁇ . It is also conceivable that a structured surface is introduced only in one of the work rolls.
- the entry angle ⁇ can be adjusted so that the contact angle between the less rough work roll and the band is above the gripping angle ⁇ and thus this side of the band with one of the further change of Angle of entry ⁇ virtually independent Walzsent experiences.
- the running angle ⁇ can then be used to control the rolling pattern of the side of the belt which is in contact with the rougher work roll.
- At least one discharge roller is used, which passes through the belt in front of the control roller.
- a drainage roller or an arrangement of a plurality of drainage rollers serves to guide the belt and to regulate the belt tension, wherein the belt in particular passes through a plurality of drain rollers and is alternately bent between them.
- at least one discharge roller offers the possibility of presetting the entry angle ⁇ , so that the entry angle ⁇ can be set in very small angular steps via the control roller and at the same time the at least one discharge roller ensures that the control roller has sufficient traction and surface damage can be avoided on the tape.
- the at least one discharge roller is positioned so that an inlet angle ⁇ B is set via the at least one discharge roller when the control roller does not touch the belt and an entry angle ⁇ is set by the positioning of the control roller, the difference between the Entry angles ⁇ and ⁇ B is at least 0.5 °, preferably 1.0 °.
- an approximately horizontal pass line is assumed below, wherein a negative entry angle ⁇ represents an entry of the strip from a position above the pass line and a positive entry angle ⁇ an entry of the strip from a position below the pass line ,
- the at least one idler roller is positioned to set an entrance angle ⁇ B.
- a control roller is above the tape, ie, the control roller is then positioned to contact the top of the tape. It can now be set with the control roller, which is located between the drain roller and the roll stand, an inlet angle ⁇ become. If the difference between the entry angles ⁇ and ⁇ B is at least 0.5 °, preferably 1.0 °, the control roller has sufficient traction on the belt to prevent slippage between the belt and the control roller. Thus, unwanted grinding or scratching effects are avoided by the control roller on the surface of the belt.
- a duo rolling stand is used as the rolling stand.
- Duo rolling stands are simple in construction and correspondingly economical. By using a control roller in front of the duo rolling stand, the rolling pattern on the belt can be controlled sufficiently well by the control roller despite the low gripping angle. It can therefore be dispensed with more complicated, maintenance-intensive and more expensive quarto and six-high rolling stands.
- a rolling stand with two identical work rolls is used.
- the work rolls can be designed the same in terms of diameter and length, but not necessarily have the same structured surface, for example, profiles with the same roughness.
- the work rolls are easily replaceable since only one type of work roll needs to be provided.
- Any inequalities in the embossing on the belt can be compensated by the method according to the invention via a change in the inlet angle ⁇ . This can also be compensated for quality variations in the preparation of the surfaces of the top and bottom rollers.
- the surface roughness of at least one surface of the strip is controlled by the adjustment of the entry angle ⁇ by the positioning of the control roller during rolling in conjunction with a measurement of the surface roughness of the strip.
- the inlet angle ⁇ can be changed via the positioning of the control roller, there is the possibility, even during the ongoing rolling operation, the inlet angle ⁇ and thus the rolling image via a positioning of the control roller influence.
- the change in the entry angle ⁇ during rolling is determined by further process parameters, in particular measured values.
- a measurement of the surface roughness of the incoming and / or outgoing band takes place, more preferably at the top and bottom of the band. In the case of measured changes or deviations in the surface roughness of the strip from a desired value, a uniform rolling pattern can thus be adjusted further via a change in the entry angle ⁇ .
- the rolling stand and the control roller can be arranged inline or within a rolling mill with upstream cold and hot rolling stands.
- the control roller allows flexible adaptation of the embossing roller stitch to the process parameters of the rolling train or the previous rolling passes.
- an embossing roll pass with a relative change in the thickness of the strip (degree of reduction) of less than 10%, preferably 1 to 6%, is carried out. Due to the low degree of rolling off the embossing of the surface structure of the roller is improved because the stretch is kept low. At the same time, solidifications can be limited and thus the mechanical properties of the strip can be advantageously influenced.
- the recupergewalzstich is performed with work rolls having a diameter of at least 200 mm to a maximum of 1200 mm.
- a range for the surface roughness R a or S a of at least 0.1 microns to a maximum of 10.0 microns, preferably at least 0.4 microns to a maximum of 4.0 microns, more preferably at least 0.5 microns are set to a maximum of 2.0 microns. It has been found that the above-mentioned ranges for the roughness R a and S a are advantageous for the forming behavior of a sheet produced from the strip. Preferably, a structure with the same roughness is applied to both sides of the strip, ie with approximately the same values for R a or S a .
- the roughness values of the belt can be monitored in particular during rolling by a measuring device.
- a measuring device In this case, an optical measuring device is preferably used which allows non-contact measurement and has sufficient accuracy for the above-mentioned roughness values.
- At least one work roll has an EDT surface structure or an EBT surface structure.
- An electrical discharge texturing (EDT) surface structure allows a high number of peaks in the surface profile.
- EBT Electron Beam Texturing
- well distributed wells can be provided in the surface.
- Surface structures produced by both methods in the work rolls are well suited for embossing.
- SBT shot blasting texturing
- a structured chromium layer as a surface structure or a laser-textured surface.
- a band consisting of aluminum or an aluminum alloy is used.
- an aluminum alloy of the type AA5xxx or AA6xxx is used.
- Other preferred types of aluminum alloys are AA6014, AA6016, AA6022, AA6111 or AA6060 and AA5005, AA5005A, AA5754 or AA5182.
- the alloys mentioned are well suited for applications with high deformation requirements and high strength at the same time.
- the forming properties of the strips produced from the alloys can be further improved by the method according to the invention.
- a device for rolling a strip in particular for carrying out the method according to the invention, in that a control roll is arranged in the strip running direction in front of the nip of the rolling stand and means for positioning the control roller relative to the pass line of the belt.
- the entry angle ⁇ can be changed and thus the embossing of the surface structure on the belt can be controlled.
- a change in the entry angle ⁇ via means for positioning the control roller is a simple and reliable way to control the surface structure of a strip in a recupergewalzstich.
- the embossing pass stitch can be adjusted with respect to the desired surface structure via a change in the entry angle ⁇ without the mill stand being changed, in particular without the work rolls having to be exchanged.
- the rolling pattern can be kept uniform by changing the entrance angle ⁇ via the control roller.
- simple work rolls without a bending device can be used to change the rolled section.
- At least one drainage roller is provided in the strip running direction in front of the control roller.
- at least one feed roller provides more possibilities and variability of the tape run for changing the entry angle ⁇ .
- means are provided for positioning the at least one discharge roller relative to the pass line.
- the at least one discharge roller can also be positioned largely independently of the desired entry angle ⁇ , since the entry angle ⁇ can be set decisively by the means for positioning the control roller.
- means for positioning the work rolls or for changing the pass line can also be provided, which further increases the variability of the device in relation to the strip run and the entry angle ⁇ .
- the means for positioning the control roller allow an entry angle ⁇ between +/- 10 °, +/- 5 °, +/- 3 ° or preferably at most between +/- 2 ⁇ .
- the control roller in 0.1 ° increments, more preferably in 0.05 ° increments of the entry angle ⁇ can be changed in position, so that a very precise influence on the surface roughness of the top and bottom of the tape can be done. This has proved to be advantageous, in particular in conjunction with only Duo crushers providing small gripping angles.
- Said angle range +/- 10 °, +/- 5 ° or +/- 3 ° for the entry angle ⁇ allows a sufficient adjustment range for influencing the surface structure of the belt.
- a duo rolling stand is provided as the rolling stand, in particular a duo rolling stand with two work rolls of the same diameter. Due to the control roller in front of the duo rolling stand, the rolling pattern on the belt can be controlled by the means for adjusting the control roller even at small gripping angles. More complicated, more maintenance-intensive and more expensive four-high and six-high stands can be dispensed with.
- At least one measuring device is provided for measuring the surface roughness of at least one surface of the strip.
- an optical measuring device is preferably used which allows non-contact measurement and has sufficient accuracy for the above-mentioned roughness values.
- the measuring device can be arranged downstream of the roll stand in the strip running direction in order to measure the rolling pattern of the embossing roll stitch.
- At least one control means is provided, via which the positioning of the control roller, optionally the positioning of the at least one discharge roller, can be regulated as a function of the measurement of the surface roughness of the at least one surface of the belt.
- the control means can evaluate the measured surface roughness and change the inlet angle ⁇ via a positioning of the control roller.
- the rolling pattern can be monitored and regulated during the rolling operation.
- Fig. 1a shows a first schematic view of the geometry during rolling.
- a nip is formed through which a pass line 6 is given.
- the pass line 6 passes through the neutral phase of the belt and is perpendicular to the connection plane of the axes of rotation of the rollers 2 and 4.
- ⁇ h is the difference between the thickness of the belt 8 before rolling and the thickness of the belt 8 'after rolling in mm (dropping).
- the work rolls 2, 4 are under a gripping angle ⁇ in contact with the tape.
- the gripping angle ⁇ is the angle between the line connecting the two axes of the work rolls 2, 4 to the line connecting an axis to the contact point to the surface of the strip.
- the diameters Dw of the work rolls 2, 4 are identical and thus have the same gripping angle ⁇ .
- the contact angle between the surface of the belt 8 and the tangent of the surface of both work rolls 2, 4 equal to the gripping angle ⁇ .
- Fig. 1b shows a second schematic view of the geometry during rolling, wherein there is an entry angle ⁇ ⁇ 0 ° between the course of the belt 8 and the pass line. This one is in Fig. 1b drawn between the pass line 6 and the center line 10 of the belt 8.
- the entrance angle ⁇ ⁇ 0 ° has the effect that the contact angle between the surface of the belt 8 and the tangent of the surface of the work rolls 2, 4 is different for both sides.
- the upper work roll 2 has a contact angle of ⁇ + ⁇ and the lower work roll 4 has a contact angle of ⁇ - ⁇ .
- Fig. 2a shows a first schematic view of the method and the device according to the invention.
- a rolling stand is shown here in simplified form by the work rolls 2, 4, wherein at least one of the work rolls 2, 4 has a structured surface.
- a control roller 12 is arranged with means for positioning relative to the pass line 6. Further in front of tape running direction at least one discharge roller 14 is provided.
- Fig. 2a the control roller 12 is positioned so that the control roller 12 does not touch the belt 8.
- Fig. 1a both contact angles of the work rolls 2, 4 to the surface of the belt 8 are equal to the gripping angle ⁇ .
- the contact angle of the work rolls 2, 4 and thus in particular the hydrodynamic lubricant intake of the respective work roll 2, 4 can be changed.
- the Lead-in angle ⁇ on the means for positioning the control roller 12 so that the rolling pattern of the top and bottom of the belt 8 'and the surface texture of the rolled strip 8' can be controlled.
- Fig. 2c shows in a further schematic view of a further embodiment of the method according to the invention or the device according to the invention.
- means are also provided for positioning the at least one discharge roller 14 relative to the pass line 6.
- the at least one discharge roller 14 is positioned so that an entry angle ⁇ B would be set without touching the control roller 12 with the belt 8.
- an inlet angle ⁇ is set, wherein the difference between the inlet angles ⁇ and ⁇ B is at least 0.5 °, preferably 1.0 °.
- control roller 12 and drain roller 14 With such a positioning of the control roller 12 and drain roller 14 it is ensured that the control roller 12 has enough traction on the belt 8 to prevent slippage between the belt 8 and the control roller 12. Consequently, undesirable grinding or scratching effects by the control roller 12 on the surface of the belt 8 are avoided.
- Fig. 2d shows in a further schematic view of a further embodiment of the method according to the invention or the device according to the invention.
- a measuring device 16 for measuring the surface roughness of at least one surface of the belt 8 ' is provided.
- the measuring device 16 can pass the measured values to a control means 18.
- the control means 18 influences the means for positioning the control roller 12 on the basis of the measured values of the measuring device 16.
- the control means 18 can thus be used to control the surface roughness of the belt 8 'during rolling.
- control means 18 may also control the means for positioning the at least one run roller 14.
- Fig. 3 shows measured center roughness values S a as a function of the entry angle ⁇ from a test series.
- an aluminum alloy strip of the alloy type AA6016 with a thickness of 2.4 mm was rolled in a rolling stand.
- the gripping angle ⁇ of the embossing stand was about 1.3 ° in the experiments.
- Fig. 4 shows surface topographies of the top and bottom rolled strips according to the invention as a function of the inlet angle ⁇ from the same series of experiments as in Fig. 3 shown.
- the control roller can be used to reliably set the same roughness on both sides of the belt.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Prägewalzen eines Bandes mit einem Walzgerüst aufweisend eine erste Arbeitswalze und eine zweite Arbeitswalze, wobei zwischen erster Arbeitswalze und zweiter Arbeitswalze ein Walzspalt mit einer Passlinie definiert wird. Weiter betrifft die Erfindung eine Vorrichtung zum Prägewalzen eines Bandes, insbesondere zur Durchführung eines erfindungsgemäßen Verfahrens, mit einem Walzgerüst aufweisend eine erste Arbeitswalze und eine zweite Arbeitswalze, wobei zwischen erster Arbeitswalze und zweiter Arbeitswalze ein Walzspalt mit einer Passlinie definiert ist.The invention relates to a method for embossing a strip with a roll stand comprising a first work roll and a second work roll, wherein between the first work roll and the second work roll, a roll gap is defined with a pass line. Furthermore, the invention relates to a device for embossing a strip, in particular for carrying out a method according to the invention, comprising a rolling stand having a first work roll and a second work roll, wherein between the first work roll and second work roll, a roll gap is defined with a pass line.
Gewalzte Bänder und Bleche können bei der Herstellung in einem letzten Walzstich, insbesondere einem letzten Kaltwalzstich, mit einer bestimmten Oberflächenstruktur versehen werden. Dabei wird ein Walzgerüst verwendet, wobei mindestens eine der Arbeitswalzen des Walzgerüsts eine definierte Oberflächenstruktur aufweist, welche durch den Walzstich in die Oberfläche des Bandes oder Blechs eingebracht wird.Rolled strips and sheets can be provided with a certain surface structure during the production in a final rolling pass, in particular a last cold-rolled pass. In this case, a roll stand is used, wherein at least one of the work rolls of the roll stand has a defined surface structure, which is introduced by the rolling pass in the surface of the strip or sheet.
Eine solche Oberflächenstruktur kann das Band bzw. das Blech für eine bestimmte Weiterverarbeitung vorbereiten. Vor allem im Kraftfahrzeugbau aber auch in anderen Anwendungsgebieten, beispielsweise dem Flugzeugbau oder Schienenfahrzeugbau werden Bleche benötigt, welche ein sehr gutes Umformverhalten aufweisen und hohe Umformgrade ermöglichen. Im Kraftfahrzeugbau sind typische Anwendungsgebiete die Karosserie und Fahrwerkteile. Bei sichtbaren, lackierten Bauteilen, beispielsweise außen sichtbaren Karosserieblechen, kommt hinzu, dass das Umformen der Werkstoffe so erfolgen muss, dass die Oberfläche nach der Lackierung nicht durch Fehler wie Fließfiguren oder Zugrilligkeit (Roping) beeinträchtigt ist. Dies ist beispielsweise für die Verwendung von Blechen zur Herstellung von Motorhauben und anderen Karosseriebauteilen eines Kraftfahrzeuges besonders wichtig.Such a surface structure can prepare the tape or the sheet for a certain further processing. Above all, in the automotive industry but also in other applications, such as aircraft or rail vehicle construction plates are required, which have a very good forming behavior and allow high degrees of deformation. In automotive engineering typical applications are the body and chassis parts. In the case of visible, painted components, for example exterior body panels, it is necessary that the forming of the materials must be carried out in such a way that the surface after painting is not impaired by defects such as flow patterns or roping. This is particularly important, for example, for the use of metal sheets for the production of bonnets and other body parts of a motor vehicle.
Bei einem Prägewalzstich werden nur geringe Stichabnahmen durchgeführt. Durch den Prägestich wird auch das Umformverhalten des Bandes mit der durch den Prägewalzstich eingebrachten spezifischen Oberflächenstruktur, d.h. dem durch das Prägewalzen entstehenden Walzbild, vorteilhaft beeinflusst. Wird das Band bzw. ein aus dem Band hergestelltes Blech in der Weiterverarbeitung umgeformt, setzt die beim Walzen eingebrachte Oberflächenstruktur des Bandes beispielsweise die Reibung zwischen Blech und Umformwerkzeug herab. Insbesondere wird die Oberflächenstruktur vorzugsweise so ausgebildet, dass das Blech beim Umformen besser mit Schmierstoffen benetzt werden kann. Die Oberfläche kann Vertiefungen in Form von Schmiertaschen aufweisen, welche Schmierstoffe aufnehmen können. Dadurch werden die Reibungskräfte beim Umformen weiter gemindert und höhere Umformgrade sind möglich.In a Prägewalzstich only small Stichiefnahmen be performed. The embossing stitch also changes the forming behavior of the tape with the specific surface structure introduced by the embossing roll stitch, i. the resulting by the embossing rolling pattern, favorably influenced. If the strip or a sheet metal produced from the strip is converted in further processing, the surface structure of the strip introduced during rolling down, for example, the friction between the sheet metal and the forming tool. In particular, the surface structure is preferably formed so that the sheet can be better wetted with lubricants during forming. The surface may have depressions in the form of lubrication pockets, which can absorb lubricants. As a result, the friction forces during forming are further reduced and higher degrees of deformation are possible.
Dafür muss jedoch eine Möglichkeit bestehen, die Oberflächenstruktur des Bandes bzw. das Walzbild einzustellen. Beim Walzen, vor allem beim Prägewalzen mit geringen Stichabnahmen ist es insbesondere schwierig, eine durchgängig gleichförmige Abprägung der Oberflächenstruktur der Arbeitswalzen, insbesondere auf beiden Seiten des Bandes, zu gewährleisten. Problematisch ist einerseits, dass die Arbeitswalzen des Walzgerüstes einem Verschleiß unterliegen und damit bei laufendem Betrieb eine über die Zeit veränderliche Oberflächenstruktur aufweisen. Zudem kann die Oberflächenstruktur der Arbeitswalzen über die Zeit Material des Bandes oder Verunreinigungen aufnehmen und dadurch ein über die Zeit veränderliches Walzbild erzeugen. Andererseits unterliegt auch das Band, welches dem Walzgerüst zugeführt wird, üblicherweise Schwankungen, womit ein Erreichen eines einheitlichen Walzbildes erschwert wird. Dabei kann das zugeführte Band beispielsweise in den Abmessungen wie der Dicke, der Breite oder auch der Wölbung oder dem Profil oder auch in der Festigkeit variieren, was wiederum das Walzbild beim Walzen schwanken lässt.However, there must be a possibility to adjust the surface structure of the strip or the rolling pattern. When rolling, especially during embossing rolling with small Stichabnahmen it is particularly difficult to ensure a consistently uniform embossing of the surface structure of the work rolls, especially on both sides of the strip. On the one hand, it is problematic that the work rolls of the roll stand are subject to wear and thus have a surface structure which changes over time during operation. In addition, the surface structure of the work rolls over time the material of the tape or impurities record and thereby produce a variable over time rolling pattern. On the other hand, the band which is fed to the rolling stand is usually subject to fluctuations, making it difficult to achieve a uniform rolling pattern. In this case, the supplied tape may for example vary in dimensions such as the thickness, the width or the curvature or the profile or in the strength, which in turn can vary the rolling pattern during rolling.
Des Weiteren ist es für eine gleichförmige Oberflächenstruktur des Bandes auf beiden Seiten abhängig von den Walzbedingungen und dem Gerüstdesign in einer Walzstraße in der Praxis oft notwendig, verschiedene Arbeitswalzen für die Oberseite und Unterseite einzusetzen, insbesondere Arbeitswalzen mit verschiedenen Oberflächentopographien. Damit wird die Bereitstellung entsprechender Arbeitswalzen für das Walzgerüst kompliziert.Furthermore, for a uniform surface structure of the belt on both sides, it depends on the rolling conditions and the stand design in a rolling mill in practice often necessary to use different work rolls for the top and bottom, in particular work rolls with different surface topographies. This complicates the provision of appropriate work rolls for the mill stand.
Daher wurde in der
Weiter wird in der
Aus der
Daher liegt der vorliegenden Erfindung das technische Problem zugrunde, ein Verfahren und eine Vorrichtung zum Walzen anzugeben, bei welchem die Oberflächenstruktur eines Bandes auf der Ober- und Unterseite prozesssicher gesteuert werden kann und die Nachteile aus dem Stand der Technik vermieden werden können.The present invention is therefore based on the technical problem of specifying a method and an apparatus for rolling, in which the surface structure of a band on the top and bottom can be controlled reliably and the disadvantages of the prior art can be avoided.
Dieses technische Problem wird gemäß einer ersten technischen Lehre der vorliegenden Erfindung durch ein Verfahren zum Walzen eines Bandes dadurch gelöst, dass eine Steuerrolle in Walzrichtung vor dem Walzspalt der Arbeitswalzen angeordnet ist, das Band über die Steuerrolle unter einem Einlaufwinkel β relativ zur Passlinie in den Walzspalt des Walzgerüsts geführt wird und die Oberflächenstruktur des Bandes durch die Wahl des Einlaufwinkels β abhängig von der Positionierung der Steuerrolle relativ zur Passlinie gesteuert wird.This technical problem is solved according to a first technical teaching of the present invention by a method for rolling a strip in that a control roller in the rolling direction in front of the nip of the work rolls is arranged, the tape on the control roller at an entrance angle β relative to the pass line in the nip the roll stand is guided and the surface structure of the belt is controlled by the choice of the inlet angle β depending on the positioning of the control roller relative to the pass line.
Das bei dem erfindungsgemäßen Verfahren verwendete Walzgerüst weist eine erste Arbeitswalze und eine zweite Arbeitswalze auf. Die Arbeitswalzen treten während der Durchführung des Verfahrens mit dem Band in Kontakt, beispielsweise steht die erste Arbeitswalze in Kontakt mit der Oberseite des Bandes und die zweite Arbeitswalze steht in Kontakt mit der Unterseite des Bandes. Dabei weist mindestens eine der Arbeitswalzen eine strukturierte Oberfläche auf. Mit einem Durchführen des Bandes durch den Walzspalt zwischen den Arbeitswalzen wird die Dicke des Bandes reduziert und durch die mindestens eine Arbeitswalze mit einer strukturierten Oberfläche ein entsprechendes strukturiertes Walzbild auf der Oberfläche des Bandes eingebracht. Bevorzugt wird mit dem Walzgerüst ein Kaltwalzstich vorgenommen. Üblicherweise wird beim Walzen im Walzgerüst ein Schmierstoff verwendet.The rolling mill used in the method according to the invention comprises a first work roll and a second work roll. The work rolls contact the belt during performance of the process, for example, the first work roll is in contact with the top of the belt and the second work roll is in contact with the bottom of the belt. At least one of the work rolls has a structured surface. By passing the strip through the nip between the work rolls, the thickness of the strip is reduced and a corresponding patterned roll pattern is formed on the surface of the strip by the at least one work roll having a textured surface. Preferably, a cold roll pass is made with the roll stand. Usually, a lubricant is used in rolling in the roll stand.
Üblicherweise werden die beiden Arbeitswalzen achsparallel eingesetzt. Die Drehachsen liegen dann parallel übereinander und bilden zusammen mit senkrecht zu den Drehachsen angeordneten Verbindungslinien zwischen den Drehachsen die Auslaufebene des Walzspaltes.Usually, the two work rolls are used axially parallel. The axes of rotation are then parallel to one another and together with perpendicular to the axes of rotation arranged connecting lines between the axes of rotation of the outlet plane of the roll gap.
Die Flächennormale der Auslaufebene der Arbeitswalzen in der neutralen Fläche des zu walzenden Bandes wird als Passlinie bezeichnet. Wird das Band senkrecht zu dieser Auslaufebene in den Walzspalt eingeführt, nimmt es einen Einlaufwinkel β = 0 ° zur Passlinie ein. Der Einlaufwinkel β wird also zur Flächennormalen der Auslaufebene bestimmt. Wird der Bandeinzug gegenüber der Flächennormalen der Auslaufebene verkippt, hat der Einlaufwinkel β Werte ungleich Null.The surface normal of the outlet plane of the work rolls in the neutral area of the strip to be rolled is called the pass line. If the strip is introduced into the roll gap perpendicular to this exit plane, it assumes an entry angle β = 0 ° to the pass line. The entry angle β is thus determined to the surface normal of the exit plane. If the tape feeder is tilted in relation to the surface normal of the exit plane, the entry angle β has values not equal to zero.
Erfindungsgemäß wird das Band über eine Steuerrolle in den Walzspalt des Walzgerüsts geführt. Über eine Positionierung der Steuerrolle relativ zur Passlinie wird dabei der Einlaufwinkel β verändert und damit die Abprägung der Oberflächenstruktur auf das Band gesteuert. Es wurde erkannt, dass eine Veränderung des Einlaufwinkels β über die Positionierung einer Steuerrolle eine einfache und prozesssichere Möglichkeit ist, die Oberflächenstruktur des Bandes in einem Prägewalzstich zu steuern. Dabei kann über eine Veränderung des Einlaufwinkels β der Walzstich in Bezug auf die gewünschte Oberflächenstruktur angepasst werden, ohne dass das Walzgerüst verändert wird oder dass sonstige vor dem Walzgerüst befindliche Vorrichtungen, wie beispielsweise Ablaufrollen, speziell für eine Veränderung des Einlaufwinkels β angepasst werden müssen. Insbesondere kann oft auch auf einen Austausch der Arbeitswalzen bei einem gewissen Grad von Verschleiß verzichtet werden, da unter bestimmten Voraussetzungen auch die Beeinflussung der Abprägung nur auf einer Seite des Bandes möglich ist. Trotz einem Arbeitswalzenverschleiß kann das Walzbild durch eine Regulierung des Einlaufwinkels β über die Steuerrolle einheitlich gehalten werden. Auch können einfache Arbeitswalzen ohne eine Biegeeinrichtung zum Verändern des Walzprofils verwendet werden. Insbesondere können auch zwei Arbeitswalzen mit ungleichen Oberflächenrauigkeiten dazu verwendet werden, ein Band mit gleichen Oberflächenrauigkeiten auf beiden Seiten herzustellen. Ebenso kann in eine bestehende Walzstraße eine positionierbare Steuerrolle nachgerüstet und damit der Einsatzbereich der bestehenden Walzstraße auf einfache Weise erweitert werden.According to the invention, the strip is guided via a control roller into the nip of the roll stand. By positioning the control roller relative to the pass line, the entry angle β is changed, thereby controlling the embossing of the surface structure on the belt. It has been recognized that a change in the entry angle β via the positioning of a control roller is a simple and process-reliable way of controlling the surface structure of the strip in an embossing roll pass. In this case, the roll pass can be adjusted with respect to the desired surface structure via a change in the entry angle β, without the rolling stand being changed or other devices located in front of the rolling stand, such as run-out rolls, having to be adjusted specifically for a change in the entry angle β. In particular, can often be dispensed with a certain degree of wear on an exchange of work rolls, since under certain conditions, the influence of the impression is only possible on one side of the tape. Despite a work roll wear, the roll pattern can be kept uniform by regulating the entry angle β through the control roller. Also, simple work rolls without a bending device can be used to change the rolled section. In particular, two work rolls with unequal surface roughness can be used to make a tape with equal surface roughness on both sides. Likewise, a positionable control roller can be retrofitted into an existing rolling mill and thus the range of application of the existing rolling train can be easily expanded.
Die technische Wirkung der Positionierung der Steuerrolle bzw. der Veränderung des Einlaufwinkels β beruht insbesondere auf einer Kontrolle des Schmierstoffeinzugs in den Walzspalt. Der Schmierstoffeinzug wird im Wesentlichen durch drei Beiträge bestimmt. Diese sind
- der Einzug durch oberflächenaktive Substanzen, welche Schmierstoff auf der Oberfläche der Arbeitswalzen und/oder dem Band aktiv binden,
- der Einzug durch geometrische Bedingungen an der Oberfläche der Arbeitswalzen und des Bandes, insbesondere die durch die Oberflächenrauigkeit und dadurch entstehende Schmiertaschen sowie
- der hydrodynamische Einzug.
- the intake by surface-active substances which actively bind lubricant on the surface of the work rolls and / or the strip,
- the indentation by geometric conditions on the surface of the work rolls and of the strip, in particular the surface roughness and resulting lubrication pockets and
- the hydrodynamic intake.
Dabei ist der hydrodynamische Einzug der dominante Beitrag zum Schmierstoffeinzug. Dieser ist von dem Kontaktwinkel zwischen der Oberfläche der jeweiligen Arbeitswalze mit der Oberfläche des Bandes abhängig. Durch eine Veränderung des Einlaufwinkels β kann der Kontaktwinkel der Arbeitswalze und damit der hydrodynamische Schmierstoffeinzug verändert werden. Insbesondere kann durch eine Veränderung des Einlaufwinkels Einfluss auf das Walzbild von Oberseite und Unterseite des Bandes genommen werden, beispielsweise um auf beiden Seiten ein einheitliches Walzbild zu erreichen und um auf unterschiedliche Oberflächenstrukturen und unterschiedlichen Verschleiß der Oberflächenstruktur der beiden Arbeitswalzen zu reagieren.The hydrodynamic intake is the dominant contribution to the lubricant intake. This is dependent on the contact angle between the surface of the respective work roll with the surface of the belt. By changing the inlet angle β of the contact angle of the work roll and thus the hydrodynamic lubricant intake can be changed. In particular, by changing the angle of entry influence on the rolling pattern of the top and bottom of the tape can be taken, for example, to achieve a uniform rolling pattern on both sides and to respond to different surface structures and different wear of the surface structure of the two work rolls.
Somit kann über eine entsprechende Positionierung der Steuerrolle relativ zur Passlinie der Schmierstoffeinzug im Walzgerüst auf der Oberseite und der Unterseite des Bandes und damit auch das Walzbild direkt beeinflusst werden.Thus, via a corresponding positioning of the control roller relative to the pass line of the lubricant inlet in the rolling stand on the top and bottom of the belt and thus the rolling pattern can be directly influenced.
Vorzugsweise wird gemäß einer ersten Ausführungsform ein Einlaufwinkel α in einem Stellbereich von +/- 2α eingestellt wird, wobei α der Greifwinkel einer Arbeitswalze (2, 4) in einem gegebenen Walzstich ist, für den gilt:
Bei einem Einlaufwinkel β oberhalb dieses Greifwinkels α liegt das Band beim Einzug an der Oberfläche der jeweiligen Arbeitswalze bereits tangential an, bevor das Band im Walzspalt verformt wird. In einer bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens wird daher ein Einlaufwinkel β größer dem Greifwinkel α = arccos [1 - (Δh / Dw)] einer Arbeitswalze eingestellt, wobei Δh die Differenz zwischen der Dicke des Bandes vor dem Walzen und der Dicke des Bandes nach dem Walzen in mm (Stichabnahme) und Dw der Durchmesser der Arbeitswalze in mm ist. Besonders beim Prägewalzen sind üblicherweise kleinere Stichabnahmen Δh vorgesehen, womit der Greifwinkel α entsprechend klein wird.At an entry angle β above this gripping angle α, the strip is already tangent to the surface on the surface of the respective work roll, before the strip is deformed in the roll gap. In a preferred embodiment of the method according to the invention, therefore, an entry angle β greater than the gripping angle α = arccos [1- (Δh / Dw)] of a work roll is set, where Δh is the difference between the thickness of the strip before rolling and the thickness of the strip after Rolls in mm (reduction of stitches) and Dw is the diameter of the work roll in mm. Especially when embossing rolls are usually smaller Stichstnahmen .DELTA.h provided, whereby the gripping angle α is correspondingly small.
Wird eine Arbeitswalze mit einem Einlaufwinkel β größer dem Greifwinkel α betrieben, so ändert sich das Walzbild beim Ändern des Einlaufwinkels β nur auf einer ersten Seite des Bandes, da die andere Seite mit einem Kontaktwinkel oberhalb des Greifwinkels in Kontakt mit der Arbeitswalze steht. Damit kann über eine Veränderung des Einzugswinkels β das Walzbild der zweiten Seite des Bandes praktisch unabhängig von der ersten Seite eingestellt werden. Folglich kann in dieser Ausgestaltung insbesondere ein einheitliches Walzbild auf beiden Seiten des Bandes mit einer vereinfachten Steuerung zur Verfügung gestellt werden. Vorzugsweise wird in 0,1 °-Schritten, besonders bevorzugt in 0,05 °-Schritten der Einlaufwinkel β verändert, so dass eine sehr präzise Beeinflussung der Oberflächenrauigkeit der Ober- und Unterseite des Bandes erfolgen kann.If a work roll is operated with an entry angle β greater than the gripping angle α, the rolling image changes when changing the entry angle β only on a first side of the strip, since the other side is in contact with the work roll with a contact angle above the gripping angle. Thus, the rolling image of the second side of the band can be adjusted virtually independently of the first page via a change in the feed angle β. Consequently, in this embodiment, in particular, a uniform rolling pattern can be provided on both sides of the belt with a simplified control. Preferably, the entry angle β is changed in 0.1 ° increments, particularly preferably in 0.05 ° increments, so that a very precise influencing of the surface roughness of the top and bottom of the band can take place.
Die Oberflächentopographie gewalzter Bänder ist vor allem abhängig von den Oberflächen der Arbeitswalzen. Allerdings kann die Oberflächenrauigkeit der beiden Arbeitswalzen unterschiedlich sein. Die Eigenschaften einer Oberflächentopografie lassen sich durch verschiedene Kennwerte bestimmen. Ein üblicher Kennwert ist die mittlere Rauheit Ra nach DIN EN ISO 4287 und DIN EN ISO 4288. Dieser Kennwert ist über die folgende Gleichung definiert:
Der Wert für Sa ergibt sich aus einer zweidimensionalen Vermessung der Oberfläche, also der Topographie Z(x,y). Die Berechnung des Werts Sa erfolgt anhand der nachfolgenden Gleichung, wobei A die Größe der Integrationsfläche ist:
Die Rauigkeit Ra bzw. Sa der Oberflächen der Arbeitswalzen kann beispielsweise im Bereich von mindestens 0,1 µm bis maximal 10,0 µm, bevorzugt mindestens 0,4 µm bis maximal 4,0 µm, insbesondere bevorzugt mindestens 0,6 µm bis maximal 3,0 µm liegen. Der Unterschied in der Rauigkeit Ra bzw. Sa der Oberflächen der Arbeitswalzen kann insbesondere im Zusammenhang mit einem Einlaufwinkel β mehr als 0,1 µm betragen, insbesondere mehr als 0,3 µm. Es ist auch denkbar, dass eine strukturierte Oberfläche nur in eine der Arbeitswalzen eingebracht ist.The roughness R a or S a of the surfaces of the work rolls may, for example, in the range of at least 0.1 microns to a maximum of 10.0 microns, preferably at least 0.4 microns to a maximum of 4.0 microns, more preferably at least 0.6 microns to maximum 3.0 microns. The difference in the roughness Ra or Sa of the surfaces of the work rolls can amount to more than 0.1 μm, in particular more than 0.3 μm, in particular in connection with an entry angle β. It is also conceivable that a structured surface is introduced only in one of the work rolls.
Mit zwei unterschiedlichen Rauigkeiten der Oberfläche der Arbeitswalzen kann beispielsweise der Einlaufwinkel β so eingestellt werden, dass der Kontaktwinkel zwischen der weniger rauen Arbeitswalze und dem Band oberhalb des Greifwinkels α liegt und damit diese Seite des Bandes mit einer von der weiteren Veränderung des Einlaufwinkels β praktisch unabhängiges Walzbild erfährt. Über den Einlaufwinkel β kann dann das Walzbild der Seite des Bandes, welche in Kontakt zu der raueren Arbeitswalze steht, gesteuert werden.With two different roughnesses of the surface of the work rolls, for example, the entry angle β can be adjusted so that the contact angle between the less rough work roll and the band is above the gripping angle α and thus this side of the band with one of the further change of Angle of entry β virtually independent Walzbild experiences. The running angle β can then be used to control the rolling pattern of the side of the belt which is in contact with the rougher work roll.
In einer weiteren Ausführungsform des erfindungsgemäßen Verfahrens wird mindestens eine Ablaufrolle verwendet, welche das Band vor der Steuerrolle durchläuft. Eine Ablaufrolle oder eine Anordnung mehrerer Ablaufrollen dient zur Führung des Bandes und zur Regulierung der Bandspannung, wobei das Band insbesondere mehrere Ablaufrollen durchläuft und zwischen diesen wechselweise gebogen wird. In Kombination mit der Steuerrolle bietet mindestens eine Ablaufrolle die Möglichkeit, den Einlaufwinkel β voreinzustellen, so dass über die Steuerrolle der Einlaufwinkel β in sehr kleinen Winkelschritten einstellbar ist und gleichzeitig über die mindestens eine Ablaufrolle gewährleistet ist, dass die Steuerrolle eine ausreichende Traktion aufweist und Oberflächenschäden am Band vermieden werden können.In a further embodiment of the method according to the invention, at least one discharge roller is used, which passes through the belt in front of the control roller. A drainage roller or an arrangement of a plurality of drainage rollers serves to guide the belt and to regulate the belt tension, wherein the belt in particular passes through a plurality of drain rollers and is alternately bent between them. In combination with the control roller, at least one discharge roller offers the possibility of presetting the entry angle β, so that the entry angle β can be set in very small angular steps via the control roller and at the same time the at least one discharge roller ensures that the control roller has sufficient traction and surface damage can be avoided on the tape.
In einer weiteren Ausführungsform des erfindungsgemäßen Verfahrens wird die mindestens eine Ablaufrolle so positioniert, dass über die mindestens eine Ablaufrolle ein Einlaufwinkel βB eingestellt wird wenn die Steuerrolle das Band nicht berührt und durch die Positionierung der Steuerrolle ein Einlaufwinkel β eingestellt, wobei die Differenz zwischen den Einlaufwinkeln β und βB mindestens 0,5°, bevorzugt 1,0° beträgt. Ohne beschränkend zu wirken, wird im Folgenden zum besseren Verständnis beispielhaft von einer näherungsweise horizontalen Passlinie ausgegangen, wobei ein negativer Einlaufwinkel β einen Einlauf des Bandes von einer Position oberhalb der Passlinie und ein positiver Einlaufwinkel β einen Einlauf des Bandes von einer Position unterhalb der Passlinie darstellt. Zunächst wird, ohne dass die Steuerrolle das Band berührt, die mindestens eine Ablaufrolle so positioniert, dass ein Einlaufwinkel βB eingestellt wird. In diesem Beispiel befindet sich eine Steuerrolle oberhalb des Bandlaufs, d.h. die Steuerrolle wird anschließend so positioniert, dass diese die Oberseite des Bandes berührt. Es kann nun mit der Steuerrolle, welche sich zwischen der Ablaufrolle und dem Walzgerüst befindet, ein Einlaufwinkel β eingestellt werden. Beträgt die Differenz zwischen den Einlaufwinkeln β und βB mindestens 0,5°, bevorzugt 1,0°, hat die Steuerrolle genügend Traktion auf dem Band um ein Durchrutschen zwischen dem Band und der Steuerrolle zu vermeiden. Somit werden unerwünschte Schleif- oder Kratzeffekte durch die Steuerrolle auf der Oberfläche des Bandes vermieden.In a further embodiment of the method according to the invention, the at least one discharge roller is positioned so that an inlet angle β B is set via the at least one discharge roller when the control roller does not touch the belt and an entry angle β is set by the positioning of the control roller, the difference between the Entry angles β and β B is at least 0.5 °, preferably 1.0 °. Without limiting it, for the sake of clarity, an approximately horizontal pass line is assumed below, wherein a negative entry angle β represents an entry of the strip from a position above the pass line and a positive entry angle β an entry of the strip from a position below the pass line , First, without the control roller touching the belt, the at least one idler roller is positioned to set an entrance angle β B. In this example, a control roller is above the tape, ie, the control roller is then positioned to contact the top of the tape. It can now be set with the control roller, which is located between the drain roller and the roll stand, an inlet angle β become. If the difference between the entry angles β and β B is at least 0.5 °, preferably 1.0 °, the control roller has sufficient traction on the belt to prevent slippage between the belt and the control roller. Thus, unwanted grinding or scratching effects are avoided by the control roller on the surface of the belt.
In einer weiteren Ausführungsform des erfindungsgemäßen Verfahrens wird als Walzgerüst ein Duo-Walzgerüst verwendet. Duo-Walzgerüste sind einfach aufgebaut und entsprechend wirtschaftlich. Durch die Verwendung einer Steuerrolle vor dem Duo-Walzgerüst kann das Walzbild auf dem Band über die Steuerrolle trotz der geringen Greifwinkel ausreichend gut kontrolliert werden. Auf kompliziertere, wartungsintensivere und teurere Quarto- und Sexto-Walzgerüste kann damit verzichtet werden.In a further embodiment of the method according to the invention, a duo rolling stand is used as the rolling stand. Duo rolling stands are simple in construction and correspondingly economical. By using a control roller in front of the duo rolling stand, the rolling pattern on the belt can be controlled sufficiently well by the control roller despite the low gripping angle. It can therefore be dispensed with more complicated, maintenance-intensive and more expensive quarto and six-high rolling stands.
Insbesondere wird ein Walzgerüst mit zwei gleichen Arbeitswalzen verwendet. Dabei können die Arbeitswalzen in Bezug auf Durchmesser und Länge gleich gestaltet sein, aber nicht notwendigerweise auch die gleiche strukturierte Oberfläche aufweisen, beispielsweise Profile mit gleicher Rauigkeit. Dadurch sind die Arbeitswalzen leicht austauschbar, da nur ein Typ einer Arbeitswalze bereitgestellt werden muss. Eventuelle Ungleichheiten in der Abprägung auf dem Band können mit dem erfindungsgemäßen Verfahren über eine Veränderung des Einlaufwinkels β ausgeglichen werden. Damit können auch Qualitätsschwankungen bei der Präparation der Oberflächen der Ober- und Unterwalzen ausgeglichen werden.In particular, a rolling stand with two identical work rolls is used. The work rolls can be designed the same in terms of diameter and length, but not necessarily have the same structured surface, for example, profiles with the same roughness. As a result, the work rolls are easily replaceable since only one type of work roll needs to be provided. Any inequalities in the embossing on the belt can be compensated by the method according to the invention via a change in the inlet angle β. This can also be compensated for quality variations in the preparation of the surfaces of the top and bottom rollers.
In einer weiteren Ausführungsform des erfindungsgemäßen Verfahrens wird die Oberflächenrauigkeit zumindest einer Oberfläche des Bandes über die Einstellung des Einlaufwinkels β durch die Positionierung der Steuerrolle während des Walzens in Verbindung mit einer Messung der Oberflächenrauigkeit des Bandes geregelt. Da der Einlaufwinkel β über die Positionierung der Steuerrolle verändert werden kann, ergibt sich die Möglichkeit, auch während des laufenden Walzbetriebs den Einlaufwinkel β und damit das Walzbild über eine Positionierung der Steuerrolle zu beeinflussen. Insbesondere wird die Veränderung des Einlaufwinkels β während des Walzens durch weitere Prozessparameter bestimmt, insbesondere Messwerte. Bevorzugt findet eine Messung der Oberflächenrauigkeit des einlaufenden und/oder auslaufenden Bandes statt, weiter bevorzugt an Ober- und Unterseite des Bandes. Bei gemessenen Veränderungen bzw. Abweichungen in der Oberflächenrauigkeit des Bandes von einem Sollwert kann somit über eine Veränderung des Einlaufwinkels β weiter ein einheitliches Walzbild eingeregelt werden.In a further embodiment of the method according to the invention, the surface roughness of at least one surface of the strip is controlled by the adjustment of the entry angle β by the positioning of the control roller during rolling in conjunction with a measurement of the surface roughness of the strip. Since the inlet angle β can be changed via the positioning of the control roller, there is the possibility, even during the ongoing rolling operation, the inlet angle β and thus the rolling image via a positioning of the control roller influence. In particular, the change in the entry angle β during rolling is determined by further process parameters, in particular measured values. Preferably, a measurement of the surface roughness of the incoming and / or outgoing band takes place, more preferably at the top and bottom of the band. In the case of measured changes or deviations in the surface roughness of the strip from a desired value, a uniform rolling pattern can thus be adjusted further via a change in the entry angle β.
Das Walzgerüst und die Steuerrolle können inline bzw. innerhalb einer Walzstraße mit vorgelagerten Kalt- und Warmwalzgerüsten angeordnet werden. Die Steuerrolle ermöglicht hierbei eine flexible Anpassung des Prägewalzstichs an die Prozessparameter der Walzstraße bzw. der vorhergehenden Walzstiche.
In einer weiteren Ausführungsform des erfindungsgemäßen Verfahrens wird ein Prägewalzstich mit einer relativen Dickenänderung des Bandes (Abwalzgrad) von weniger als 10 %, bevorzugt 1 bis 6 % durchgeführt. Durch die geringen Abwalzgrade wird das Abprägen der Oberflächenstruktur der Walze verbessert, weil die Streckung gering gehalten wird. Gleichzeitig können Verfestigungen begrenzt und damit die mechanischen Eigenschaften des Bandes vorteilhaft beeinflusst werden. Vorzugsweise wird der Prägewalzstich mit Arbeitswalzen mit einem Durchmesser von mindestens 200 mm bis maximal 1200 mm durchgeführt.The rolling stand and the control roller can be arranged inline or within a rolling mill with upstream cold and hot rolling stands. The control roller allows flexible adaptation of the embossing roller stitch to the process parameters of the rolling train or the previous rolling passes.
In a further embodiment of the method according to the invention, an embossing roll pass with a relative change in the thickness of the strip (degree of reduction) of less than 10%, preferably 1 to 6%, is carried out. Due to the low degree of rolling off the embossing of the surface structure of the roller is improved because the stretch is kept low. At the same time, solidifications can be limited and thus the mechanical properties of the strip can be advantageously influenced. Preferably, the Prägewalzstich is performed with work rolls having a diameter of at least 200 mm to a maximum of 1200 mm.
In einer weiteren Ausführungsform des erfindungsgemäßen Verfahrens kann auf mindestens einer Oberfläche des Bandes über eine Positionierung der Steuerrolle und die Einstellung des Einlaufwinkels b ein Bereich für die Oberflächenrauigkeit Ra bzw. Sa von mindestens 0,1 µm bis maximal 10,0 µm, bevorzugt mindestens 0,4 µm bis maximal 4,0 µm, insbesondere bevorzugt mindestens 0,5 µm bis maximal 2,0 µm eingestellt werden. Es hat sich herausgestellt, dass die oben genannten Bereiche für die Rauigkeit Ra bzw. Sa vorteilhaft für das Umformverhalten eines aus dem Band hergestellten Blechs sind. Bevorzugt wird auf beiden Bandseiten eine Struktur mit einer gleichen Rauigkeit aufgebracht, also mit näherungsweise gleichen Werten für Ra oder Sa.In a further embodiment of the method according to the invention can on at least one surface of the belt via a positioning of the control roller and the adjustment of the lead-in angle b, a range for the surface roughness R a or S a of at least 0.1 microns to a maximum of 10.0 microns, preferably at least 0.4 microns to a maximum of 4.0 microns, more preferably at least 0.5 microns are set to a maximum of 2.0 microns. It has been found that the above-mentioned ranges for the roughness R a and S a are advantageous for the forming behavior of a sheet produced from the strip. Preferably, a structure with the same roughness is applied to both sides of the strip, ie with approximately the same values for R a or S a .
Die Rauigkeitswerte des Bandes können insbesondere während des Walzens durch eine Messvorrichtung überwacht werden. Bevorzugt kommt hierbei eine optische Messvorrichtung zum Einsatz, welche eine berührungsfreie Messung erlaubt und für die oben genannten Rauigkeitswerte genügende Genauigkeit aufweist.The roughness values of the belt can be monitored in particular during rolling by a measuring device. In this case, an optical measuring device is preferably used which allows non-contact measurement and has sufficient accuracy for the above-mentioned roughness values.
In einer weiteren Ausführungsform des erfindungsgemäßen Verfahrens weist mindestens eine Arbeitswalze eine EDT- Oberflächenstruktur oder eine EBT-Oberflächenstruktur auf. Eine über "Electrical Discharge Texturing" (EDT) hergestellte Oberflächenstruktur erlaubt eine hohe Anzahl von Spitzen im Oberflächenprofil. Mit "Electron Beam Texturing" (EBT) können kontrolliert verteilte Vertiefungen in der Oberfläche bereitgestellt werden. Durch beide Verfahren hergestellte Oberflächenstrukturen in den Arbeitswalzen sind gut zum Prägewalzen geeignet. Darüber hinaus ist es auch möglich, "Shot Blasting Texturing" (SBT) zur Oberflächenstrukturierung zu verwenden. Auch denkbar ist eine strukturierte Chromschicht als Oberflächenstruktur oder eine mittels Laser texturierte Oberfläche.In a further embodiment of the method according to the invention, at least one work roll has an EDT surface structure or an EBT surface structure. An electrical discharge texturing (EDT) surface structure allows a high number of peaks in the surface profile. With Electron Beam Texturing (EBT), well distributed wells can be provided in the surface. Surface structures produced by both methods in the work rolls are well suited for embossing. In addition, it is also possible to use "shot blasting texturing" (SBT) for surface structuring. Also conceivable is a structured chromium layer as a surface structure or a laser-textured surface.
In einer weiteren Ausführungsform des erfindungsgemäßen Verfahrens wird ein Band bestehend aus Aluminium oder einer Aluminiumlegierung verwendet. Insbesondere kommt dabei eine Aluminiumlegierung des Typs AA5xxx oder AA6xxx zum Einsatz. Weiter bevorzugte Typen von Aluminiumlegierungen sind dabei AA6014, AA6016, AA6022, AA6111 oder AA6060 sowie AA5005, AA5005A, AA5754 oder AA5182. Die genannten Legierungen sind gut für Anwendungen mit hohen Umformanforderungen bei gleichzeitig hoher Festigkeit geeignet. Die Umformeigenschaften der aus den Legierungen hergestellten Bänder können durch das erfindungsgemäße Verfahren weiter verbessert werden.In a further embodiment of the method according to the invention, a band consisting of aluminum or an aluminum alloy is used. In particular, an aluminum alloy of the type AA5xxx or AA6xxx is used. Other preferred types of aluminum alloys are AA6014, AA6016, AA6022, AA6111 or AA6060 and AA5005, AA5005A, AA5754 or AA5182. The alloys mentioned are well suited for applications with high deformation requirements and high strength at the same time. The forming properties of the strips produced from the alloys can be further improved by the method according to the invention.
Gemäß einer zweiten Lehre der vorliegenden Erfindung wird das oben genannte technische Problem durch eine Vorrichtung zum Walzen eines Bandes, insbesondere zur Durchführung des erfindungsgemäßen Verfahrens, dadurch gelöst, dass eine Steuerrolle in Bandlaufrichtung vor dem Walzspalt des Walzgerüsts angeordnet ist und Mittel zur Positionierung der Steuerrolle relativ zur Passlinie des Bandes vorgesehen sind.According to a second teaching of the present invention, the abovementioned technical problem is solved by a device for rolling a strip, in particular for carrying out the method according to the invention, in that a control roll is arranged in the strip running direction in front of the nip of the rolling stand and means for positioning the control roller relative to the pass line of the belt.
Über die Mittel zur Positionierung der Steuerrolle relativ zur Passlinie kann dabei der Einlaufwinkel β verändert und damit die Abprägung der Oberflächenstruktur auf das Band gesteuert werden. Eine Veränderung des Einlaufwinkels β über Mittel zur Positionierung der Steuerrolle ist eine einfache und prozesssichere Möglichkeit, die Oberflächenstruktur eines Bandes in einem Prägewalzstich zu steuern. Dabei kann über eine Veränderung des Einlaufwinkels β der Prägewalzstich in Bezug auf die gewünschte Oberflächenstruktur angepasst werden, ohne dass das Walzgerüst verändert wird, insbesondere ohne dass die Arbeitswalzen ausgetauscht werden müssen. Insbesondere kann trotz einem Arbeitswalzenverschleiß das Walzbild durch eine Veränderung des Einlaufwinkels β über die Steuerrolle einheitlich gehalten werden. Auch können einfache Arbeitswalzen ohne eine Biegeeinrichtung zum Verändern des Walzprofils verwendet werden.By way of the means for positioning the control roller relative to the pass line, the entry angle β can be changed and thus the embossing of the surface structure on the belt can be controlled. A change in the entry angle β via means for positioning the control roller is a simple and reliable way to control the surface structure of a strip in a Prägewalzstich. In this case, the embossing pass stitch can be adjusted with respect to the desired surface structure via a change in the entry angle β without the mill stand being changed, in particular without the work rolls having to be exchanged. In particular, despite a work roll wear, the rolling pattern can be kept uniform by changing the entrance angle β via the control roller. Also, simple work rolls without a bending device can be used to change the rolled section.
In einer Ausgestaltung der erfindungsgemäßen Vorrichtung ist in Bandlaufrichtung vor der Steuerrolle mindestens eine Ablaufrolle vorgesehen. In Kombination mit der Steuerrolle bietet mindestens eine Ablaufrolle mehr Möglichkeiten und Variabilität des Bandlaufs zur Veränderung des Einlaufwinkels β.In one embodiment of the device according to the invention, at least one drainage roller is provided in the strip running direction in front of the control roller. In combination with the control roller, at least one feed roller provides more possibilities and variability of the tape run for changing the entry angle β.
Insbesondere sind Mittel zur Positionierung der mindestens einen Ablaufrolle relativ zur Passlinie vorgesehen. Damit kann die mindestens eine Ablaufrolle auch weitgehend unabhängig vom gewünschten Einlaufwinkel β positioniert werden, da der Einlaufwinkel β durch die Mittel zum Positionierung der Steuerrolle maßgeblich eingestellt werden kann.In particular, means are provided for positioning the at least one discharge roller relative to the pass line. In this way, the at least one discharge roller can also be positioned largely independently of the desired entry angle β, since the entry angle β can be set decisively by the means for positioning the control roller.
Weiter können auch Mittel zur Positionierung der Arbeitswalzen bzw. zur Veränderung der Passlinie vorgesehen sein, was die Variabilität der Vorrichtung in Bezug auf den Bandlauf und den Einlaufwinkel β weiter erhöht.Furthermore, means for positioning the work rolls or for changing the pass line can also be provided, which further increases the variability of the device in relation to the strip run and the entry angle β.
In einer weiteren Ausgestaltung der erfindungsgemäßen Vorrichtung erlauben die Mittel zur Positionierung der Steuerrolle einen Einlaufwinkel β zwischen +/-10°, +/-5°, +/- 3° oder bevorzugt maximal zwischen +/- 2α. Vorzugsweise kann die Steuerrolle in 0,1 °-Schritten, besonders bevorzugt in 0,05 °-Schritten des Einlaufwinkels β in ihrer Position verändert werden, so dass eine sehr präzise Beeinflussung der Oberflächenrauigkeit der Ober- und Unterseite des Bandes erfolgen kann. Dies hat sich insbesondere in Verbindung mit lediglich kleine Greifwinkel bereitstellenden Duowalzgerüsten als vorteilhaft erwiesen. Der genannte Winkelbereich +/-10 °, +/-5° oder +/- 3° für den Einlaufwinkel β ermöglicht einen ausreichenden Einstellbereich zur Beeinflussung der Oberflächenstruktur des Bandes. Bei Begrenzung auf einen Winkelbereich von +/- 5°, +/- 3° oder +/- 2α ist es möglich besonders kleine Schrittweiten für die Winkeleinstellung auf einfache Weise zu realisieren.In a further embodiment of the device according to the invention, the means for positioning the control roller allow an entry angle β between +/- 10 °, +/- 5 °, +/- 3 ° or preferably at most between +/- 2α. Preferably, the control roller in 0.1 ° increments, more preferably in 0.05 ° increments of the entry angle β can be changed in position, so that a very precise influence on the surface roughness of the top and bottom of the tape can be done. This has proved to be advantageous, in particular in conjunction with only Duo crushers providing small gripping angles. Said angle range +/- 10 °, +/- 5 ° or +/- 3 ° for the entry angle β allows a sufficient adjustment range for influencing the surface structure of the belt. When limiting to an angle range of +/- 5 °, +/- 3 ° or +/- 2α, it is possible to realize particularly small increments for the angle adjustment in a simple manner.
In einer weiteren Ausgestaltung der erfindungsgemäßen Vorrichtung ist als Walzgerüst ein Duo-Walzgerüst vorgesehen, insbesondere ein Duo-Walzgerüst mit zwei Arbeitswalzen mit gleichem Durchmesser. Durch die Steuerrolle vor dem Duo-Walzgerüst kann das Walzbild auf dem Band vorrangig über die Mittel zum Verstellen der Steuerrolle auch bei kleinen Greifwinkeln kontrolliert werden. Auf kompliziertere, wartungsintensivere und teurere Quarto- und Sexto-Walzgerüste kann verzichtet werden.In a further embodiment of the device according to the invention, a duo rolling stand is provided as the rolling stand, in particular a duo rolling stand with two work rolls of the same diameter. Due to the control roller in front of the duo rolling stand, the rolling pattern on the belt can be controlled by the means for adjusting the control roller even at small gripping angles. More complicated, more maintenance-intensive and more expensive four-high and six-high stands can be dispensed with.
In einer weiteren Ausgestaltung der erfindungsgemäßen Vorrichtung ist mindestens eine Messvorrichtung zur Messung der Oberflächenrauigkeit mindestens einer Oberfläche des Bandes vorgesehen. Bevorzugt kommt hierbei eine optische Messvorrichtung zum Einsatz, welche eine berührungsfreie Messung erlaubt und für die oben genannten Rauigkeitswerte genügende Genauigkeit aufweist. Die Messvorrichtung kann insbesondere in Bandlaufrichtung nach dem Walzgerüst angeordnet sein, um das Walzbild des Prägewalzstichs zu messen.In a further embodiment of the device according to the invention, at least one measuring device is provided for measuring the surface roughness of at least one surface of the strip. In this case, an optical measuring device is preferably used which allows non-contact measurement and has sufficient accuracy for the above-mentioned roughness values. In particular, the measuring device can be arranged downstream of the roll stand in the strip running direction in order to measure the rolling pattern of the embossing roll stitch.
Insbesondere ist mindestens ein Regelungsmittel vorgesehen, über welches die Positionierung der Steuerrolle, optional die Positionierung der mindestens einen Ablaufrolle, in Abhängigkeit der Messung der Oberflächenrauigkeit der mindestens einen Oberfläche des Bandes regelbar ist. Das Regelungsmittel kann dabei die gemessene Oberflächenrauigkeit auswerten und den Einlaufwinkel β über eine Positionierung der Steuerrolle verändern. Dadurch kann während des Walzbetriebs das Walzbild überwacht und geregelt werden.In particular, at least one control means is provided, via which the positioning of the control roller, optionally the positioning of the at least one discharge roller, can be regulated as a function of the measurement of the surface roughness of the at least one surface of the belt. The control means can evaluate the measured surface roughness and change the inlet angle β via a positioning of the control roller. As a result, the rolling pattern can be monitored and regulated during the rolling operation.
Für weitere Ausgestaltungen und Vorteile der erfindungsgemäßen Vorrichtung wird auf die obigen Ausführungen sowie auf die Unteransprüche des erfindungsgemäßen Verfahrens verwiesen sowie auf die Zeichnung. In der Zeichnung zeigen
- Fig. 1a und 1b
- schematische Ansichten der Geometrie beim Walzen,
- Fig. 2a bis 2d
- schematische Ansichten des erfindungsgemäßen Verfahrens bzw. der erfindungsgemäßen Vorrichtung,
- Fig. 3
- gemessene Mittenrauwerte Sa in Abhängigkeit des Einlaufwinkels und
- Fig. 4
- Oberflächentopographien der Oberseite und Unterseite erfindungsgemäß gewalzter Bänder in Abhängigkeit des Einlaufwinkels.
- Fig. 1a and 1b
- schematic views of the geometry during rolling,
- Fig. 2a to 2d
- schematic views of the method and the device according to the invention,
- Fig. 3
- measured average roughness values S a as a function of the entry angle and
- Fig. 4
- Surface topographies of the top and bottom rolled strips according to the invention as a function of the inlet angle.
Die Arbeitswalzen 2, 4 stehen unter einem Greifwinkel α in Kontakt zum Band. Wie in
Weiter verläuft das Band 8 in
Bei einer Verwendung eines Schmierstoffes ist dabei der Schmierstoffeinzug in den Walzspalt von dem Kontaktwinkel α + β bzw. α - β zwischen der Tangente der Oberfläche der jeweiligen Arbeitswalze 2, 4 mit der Oberfläche des Bandes 8 abhängig. Durch eine Verstellung des Einlaufwinkels β können die Kontaktwinkel der Arbeitswalzen 2, 4 und damit der hydrodynamische Schmierstoffeinzug verändert werden. Insbesondere kann durch eine Verstellung des Einlaufwinkels β Einfluss auf das Walzbild von Oberseite und Unterseite des Bandes 8' genommen werden.When using a lubricant while the lubricant is drawn into the nip of the contact angle α + β or α - β between the tangent of Surface of the
Überschreitet der Einlaufwinkel β den Greifwinkel a, so liegt das Band tangential an der Arbeitswalze 4 an. Eine weitere Vergrößerung des Einlaufwinkels β bewirkt dann keine wesentliche Veränderung des Schmierstoffeinzugs an der Arbeitswalze 4 mehr.If the entry angle β exceeds the gripping angle a, then the strip lies tangentially against the
In
Dagegen ist in
Durch eine Veränderung des Einlaufwinkels β können die Kontaktwinkel der Arbeitswalzen 2, 4 und damit insbesondere der hydrodynamische Schmierstoffeinzug der jeweiligen Arbeitswalze 2, 4 verändert werden. Durch eine Veränderung des Einlaufwinkels β über die Mittel zur Positionierung der Steuerrolle 12 kann damit das Walzbild von Oberseite und Unterseite des Bandes 8' bzw. die Oberflächenstruktur des gewalzten Bandes 8' gesteuert werden.By changing the inlet angle β, the contact angle of the work rolls 2, 4 and thus in particular the hydrodynamic lubricant intake of the
Die mindestens eine Ablaufrolle 14 ist dabei so positioniert, dass ohne eine Berührung der Steuerrolle 12 mit dem Band 8 ein Einlaufwinkel βB eingestellt wäre. Durch die Positionierung der Steuerrolle 12 wird ein Einlaufwinkel β eingestellt, wobei die Differenz zwischen den Einlaufwinkeln β und βB mindestens 0,5°, bevorzugt 1,0° beträgt.The at least one
Mit einer solchen Positionierung von Steuerrolle 12 und Ablaufrolle 14 ist sichergestellt, dass die Steuerrolle 12 genügend Traktion auf dem Band 8 hat, um ein Durchrutschen zwischen dem Band 8 und der Steuerrolle 12 zu vermeiden. Folglich werden unerwünschte Schleif- oder Kratzeffekte durch die Steuerrolle 12 auf der Oberfläche des Bandes 8 vermieden.With such a positioning of the
Optional kann das Regelungsmittel 18 auch die Mittel zur Positionierung der mindestens einer Ablaufrolle 14 steuern.Optionally, the control means 18 may also control the means for positioning the at least one
Die Bänder wurden mit verschiedenen Einlaufwinkeln β, welche über die Steuerrolle eingestellt wurden, gewalzt. Für Einlaufwinkel β > α = 1,3° wurde der Greifwinkel α der unteren Arbeitswalze überschritten. Daher zeigte sich im Mittenrauwert Sa für die Unterseite des Bandes keine große Variation. Das Band legte sich vielmehr an der Unterseite tangential an die Oberfläche der unteren Arbeitswalze, womit praktisch unabhängig vom Einlaufwinkel β ein konstantes Walzbild erzeugt wurde. Für die Oberseite zeigte sich jedoch eine überraschend starke Abhängigkeit des Mittenrauwerts Sa vom Einlaufwinkel β. Es wurde festgestellt, dass über die Änderung des Einlaufwinkels β durch die Positionierung der Steuerrolle ein breiter Bereich an verschiedenen Rauigkeiten an der Oberseite des Bandes zu erreichen ist und die jeweiligen Mittenrauwerte Sa gezielt eingestellt werden können. Dabei ist die Abhängigkeit des Mittenrauwerts Sa vom Einlaufwinkel β in dem gemessenen Bereich in guter Näherung linear.The belts were rolled with different entrance angles β set via the control roller. For entry angle β> α = 1.3 °, the gripping angle α of the lower work roll was exceeded. Therefore, in the center roughness S a for the lower surface of the tape showed no great variation. Rather, the tape lay tangentially on the underside of the surface of the lower work roll, which was virtually independent of the lead-in angle β a constant Walzbild was generated. For the upper side, however, there was a surprisingly strong dependence of the average roughness value S a on the entry angle β. It has been found that by means of the positioning of the control roller, a broad range of different roughnesses at the top side of the belt can be achieved via the change of the entry angle β and the respective center roughness values S a can be set in a targeted manner. In this case, the dependence of the average roughness value S a on the entry angle β in the measured region is linear to a good approximation.
Auch auf eine Veränderung bzw. einen Verschleiß der Arbeitswalzen kann mit der Steuerrolle reagiert werden. In der vorliegenden Versuchsreihe wurde nach einer Steigerung des Einlaufwinkels β von 0,97° bis 2,20° erneut der Einlaufwinkel β = 1,74° eingestellt. Dabei zeigte sich, wie in
Claims (15)
- Method for roll-embossing a strip- with a roll stand comprising a first work roll (2) and a second work roll (4), wherein a rolling gap with a pass line is defined between the first work roll (2) and the second work roll (4), wherein- a control roll (12) is arranged in front of the rolling gap of the work rolls in the rolling direction,- the strip (8) is guided into the rolling gap of the roll stand via the control roll (12) at an entry angle β relative to the pass line (6) and- the embossing of the surface structure of the work roll on the strip (8') is controlled by the selection of the entry angle β depending on the positioning of the control roll (12) relative to the pass line (6),- an entry angle β is set within an adjustment range of +/- 2α, where α is the bite angle of a work roll (2, 4) in a given rolling pass, for which:
- Method according to claim 1,
characterised in that
at least one guide roll (14) is used through which the strip (8) runs prior to the control roll (12). - Method according to claim 2,
characterised in that- the at least one guide roll (14) is positioned such that an entry angle βB is set by means of the at least one guide roll (14) if the control roll (12) does not touch the strip (8) and- an entry angle β is set by positioning the control roll (12), so that the difference between the entry angles β and βB is at least 0.5°, preferably at least 1.0°. - Method according to any one of claims 1 to 3,
characterised in that
a two-high roll stand is used as a roll stand, in particular a two-high roll stand with two identical work rolls (2, 4). - Method according to any one of claims 1 to 4,
characterised in that
the surface roughness of at least one surface of the strip (8') is controlled by positioning of the control roll (12) during rolling in combination with a measurement of the surface roughness of the strip (8'). - Method according to anyone of claims 1 to 5,
characterised in that
during the rolling pass a relative change in thickness of the strip (8, 8') (degree of reduction) of less than 10%, preferably 1 - 6% takes place. - Method according to any one of claims 1 to 6,
characterised in that
a range for the surface roughness Ra or Sa, respectively, of at least 0.1 µm up to a maximum of 10.0 µm, preferably at least 0.4 µm up to a maximum of 4,0 µm, particularly preferably at least 0.5 µm up to a maximum of 2.0 µm can be set on at least one surface of the strip (8') by positioning of the control roll (12). - Method according to any one of claims 1 to 7,
characterised in that
at least one work roll (2, 4) has an EDT surface structure, an EBT surface structure, a structured chrome layer or a laser-textured surface. - Method according to any one of claims 1 to 8,
characterised in that
a strip (8) consisting of aluminium or an aluminium alloy is used, in particular an aluminium alloy of the type AA5xxx or AA6xxx. - Apparatus for roll-embossing a strip, in particular for carrying out a method according to any one of claims 1 to 9,- with a roll stand comprising a first work roll (2) and a second work roll (4), wherein a rolling gap with a pass line (6) is defined between the first work roll (2) and the second work roll (4),- a control roll (12) is arranged in front of the rolling gap of the roll stand in the running direction of the strip,- means for positioning the control roll (12) relative to the pass line (6) are provided, whereinthe means for positioning the control roll (12) allow the entry angle β to be adjusted within a range between +/-10° or +/- 5°, preferably between +/- 3°, wherein the position of the control roll can be adjusted in 0.1° increments, particularly preferably in 0.05° increments of the entry angle β.
- Apparatus according to claim 10,
characterised in that
at least one guide roll (14) is provided in front of the control roll (12) in the running direction of the strip. - Apparatus according to claim 11,
characterised in that
means for positioning the at least one guide roll (14) relative to the pass line are provided. - Apparatus according to any one of claims 10 to 12,
characterised in that
a two-high roll stand is used as a roll stand, in particular a roll stand with two identical work rolls (2, 4). - Apparatus according to any one of claims 10 to 13,
characterised in that
at least one measuring device is provided for measurement of the surface roughness of at least one surface of the strip (8'). - Apparatus according to claim 14,
characterised in that
at least one control means is provided by means of which the positioning of the control roll (12), optionally the positioning of the at least one guide roll (14), can be controlled depending on the measurement of the surface roughness of the at least one surface of the strip (8').
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015101580.3A DE102015101580B3 (en) | 2015-02-04 | 2015-02-04 | Method and device for embossing a strip |
PCT/EP2016/051556 WO2016124447A1 (en) | 2015-02-04 | 2016-01-26 | Method and device for the embossment rolling of a strip |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3253505A1 EP3253505A1 (en) | 2017-12-13 |
EP3253505B1 true EP3253505B1 (en) | 2019-07-10 |
Family
ID=55229715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16701520.5A Active EP3253505B1 (en) | 2015-02-04 | 2016-01-26 | Method and apparatus for embossing rolling metal strip |
Country Status (7)
Country | Link |
---|---|
US (1) | US10751773B2 (en) |
EP (1) | EP3253505B1 (en) |
JP (1) | JP6452212B2 (en) |
KR (1) | KR102046588B1 (en) |
CN (2) | CN107995881A (en) |
DE (1) | DE102015101580B3 (en) |
WO (1) | WO2016124447A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR112018010595B1 (en) * | 2015-12-04 | 2023-04-18 | Arconic Technologies Llc | TEXTURE APPLICATION METHOD TO A METAL SHEET |
FR3064933B1 (en) * | 2017-04-05 | 2019-05-03 | Atelier Steaven Richard | METHOD OF MARKING A SHEET AND A ROLLER USING THE SAME |
CN111229839B (en) * | 2020-01-22 | 2021-07-30 | 浦项(张家港)不锈钢股份有限公司 | Production process method of cold-rolled embossed plate of twenty-high rolling mill |
DE102021125889A1 (en) * | 2021-10-06 | 2023-04-06 | Thyssenkrupp Steel Europe Ag | Process for skin-passing a steel sheet, skin-passed steel sheet and component made therefrom |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1147986A (en) | 1965-07-09 | 1969-04-10 | United Eng Foundry Co | Strip deflector means and control |
JPS55165217A (en) | 1979-06-12 | 1980-12-23 | Ishikawajima Harima Heavy Ind Co Ltd | Lubricating method for rolled material |
GB2144666A (en) | 1983-08-10 | 1985-03-13 | British Steel Corp | Mill stand rolls |
JPH02169109A (en) | 1988-12-23 | 1990-06-29 | Kawasaki Steel Corp | Method for cold rolling |
JPH1094803A (en) | 1996-09-24 | 1998-04-14 | Kawasaki Steel Corp | Manufacture of sheet excellent in surface property |
JPH10166001A (en) | 1996-12-06 | 1998-06-23 | Sumitomo Metal Ind Ltd | Method for rolling metallic strip |
JP2000094005A (en) | 1998-09-14 | 2000-04-04 | Kawasaki Steel Corp | Temper rolling method |
WO2003018221A2 (en) | 2001-08-24 | 2003-03-06 | Corus Technology Bv | Device for processing a metal slab, plate or strip, and product produced using this device |
US20040148994A1 (en) | 2001-06-27 | 2004-08-05 | Christoph Schwarz | Bridle unit |
WO2009020587A1 (en) | 2007-08-06 | 2009-02-12 | H.C. Starck, Inc. | Refractory metal plates with improved uniformity of texture |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2192044A (en) * | 1937-06-09 | 1940-02-27 | Westinghouse Electric & Mfg Co | Tensiometer for strip mills |
FR2403839A1 (en) * | 1977-09-26 | 1979-04-20 | Secim | PROCEDURE FOR REGULATING THE THICKNESS OF A FLAT PRODUCT DURING LAMINATION AND CORRESPONDING INSTALLATION |
US4307591A (en) * | 1980-03-31 | 1981-12-29 | Westinghouse Electric Corp. | Rolling mill looper control system |
GB2072556A (en) * | 1980-04-02 | 1981-10-07 | Head Wrightson Mach | Rolling and flattening strip |
JPS58184007A (en) * | 1982-04-23 | 1983-10-27 | Toshiba Corp | Looper control device of continuous rolling mill |
DE8419637U1 (en) * | 1984-06-30 | 1984-10-11 | IOG Industrie-Ofenbau GmbH, 4000 Düsseldorf | DEVICE FOR PRODUCING A TAPE, IN PARTICULAR METAL TAPE WITH TAPE EDGING |
JPH0636927B2 (en) * | 1989-06-30 | 1994-05-18 | 川崎製鉄株式会社 | Strip warpage control method in hot rolling |
US5660066A (en) * | 1993-10-08 | 1997-08-26 | Kawasaki Steel Corporation | Interstand tension controller for a continuous rolling mill |
JP3286057B2 (en) * | 1994-01-19 | 2002-05-27 | 新日本製鐵株式会社 | Control device for continuous hot rolling mill |
DE4424613B4 (en) * | 1994-07-13 | 2007-03-29 | Sms Demag Ag | Method for operating a rolling stand |
DE19529429C2 (en) * | 1995-08-10 | 1999-10-21 | Thyssen Stahl Ag | Thin sheet, rolling mill roll for thin sheet production, process for structuring the surface of the rolling mill roll and its use |
JP2688016B2 (en) * | 1995-12-12 | 1997-12-08 | 防衛庁技術研究本部長 | Coining processing method |
JP3762001B2 (en) * | 1996-11-11 | 2006-03-29 | 株式会社日本製鋼所 | Embossing rolling mill |
DE19744503A1 (en) * | 1997-10-09 | 1999-04-15 | Schloemann Siemag Ag | Device and method for influencing the frictional relationships between an upper and a lower roll of a roll stand |
JP4443729B2 (en) * | 2000-06-09 | 2010-03-31 | 古河電気工業株式会社 | How to determine rolling pass schedule |
WO2002013984A1 (en) * | 2000-08-10 | 2002-02-21 | Mitsubishi Denki Kabushiki Kaisha | Control device for continuous rolling mill |
EP1344580A1 (en) * | 2002-03-12 | 2003-09-17 | Alcan Technology & Management Ltd. | Method and plant for producing a texturized aluminium strip |
EP2098309B1 (en) * | 2006-12-18 | 2014-04-16 | JFE Steel Corporation | Method of temper rolling of steel strip and process for manufacturing high tensile cold rolled steel sheet |
WO2009029659A1 (en) * | 2007-08-28 | 2009-03-05 | Air Products And Chemicals, Inc. | Discharging cryogen onto work surfaces in a cold roll mill |
EP2277639A1 (en) * | 2009-07-15 | 2011-01-26 | Siemens Aktiengesellschaft | Ribbon stroke and loop control |
CN102357527A (en) * | 2011-06-22 | 2012-02-22 | 重庆大学 | Magnesium alloy plate rolling device |
US9095886B2 (en) * | 2011-06-27 | 2015-08-04 | University Of Central Florida Research Foundation, Inc. | Mill control system and method for control of metal strip rolling |
EP2671652B1 (en) * | 2012-06-06 | 2016-03-16 | GE Energy Power Conversion Technology Limited | Hot strip mill controller |
DK2687383T3 (en) * | 2012-07-18 | 2016-02-15 | Ardagh Mp Group Netherlands Bv | Embossing the flat metal blank (method and apparatus) |
KR20180049269A (en) * | 2014-05-12 | 2018-05-10 | 아르코닉 인코포레이티드 | Apparatus and method for rolling metal |
-
2015
- 2015-02-04 DE DE102015101580.3A patent/DE102015101580B3/en active Active
-
2016
- 2016-01-26 WO PCT/EP2016/051556 patent/WO2016124447A1/en active Application Filing
- 2016-01-26 EP EP16701520.5A patent/EP3253505B1/en active Active
- 2016-01-26 CN CN201680008946.XA patent/CN107995881A/en active Pending
- 2016-01-26 KR KR1020177024848A patent/KR102046588B1/en active IP Right Grant
- 2016-01-26 JP JP2017540702A patent/JP6452212B2/en active Active
- 2016-01-26 CN CN202110856377.7A patent/CN113732063A/en active Pending
-
2017
- 2017-08-04 US US15/668,789 patent/US10751773B2/en active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1147986A (en) | 1965-07-09 | 1969-04-10 | United Eng Foundry Co | Strip deflector means and control |
JPS55165217A (en) | 1979-06-12 | 1980-12-23 | Ishikawajima Harima Heavy Ind Co Ltd | Lubricating method for rolled material |
GB2144666A (en) | 1983-08-10 | 1985-03-13 | British Steel Corp | Mill stand rolls |
JPH02169109A (en) | 1988-12-23 | 1990-06-29 | Kawasaki Steel Corp | Method for cold rolling |
JPH1094803A (en) | 1996-09-24 | 1998-04-14 | Kawasaki Steel Corp | Manufacture of sheet excellent in surface property |
JPH10166001A (en) | 1996-12-06 | 1998-06-23 | Sumitomo Metal Ind Ltd | Method for rolling metallic strip |
JP2000094005A (en) | 1998-09-14 | 2000-04-04 | Kawasaki Steel Corp | Temper rolling method |
US20040148994A1 (en) | 2001-06-27 | 2004-08-05 | Christoph Schwarz | Bridle unit |
WO2003018221A2 (en) | 2001-08-24 | 2003-03-06 | Corus Technology Bv | Device for processing a metal slab, plate or strip, and product produced using this device |
WO2009020587A1 (en) | 2007-08-06 | 2009-02-12 | H.C. Starck, Inc. | Refractory metal plates with improved uniformity of texture |
Non-Patent Citations (5)
Title |
---|
"Aluminium Rolling - processes principles and applications", 2011, article R V SINGH: "Chapter 4 and 9", pages: 150-186 - 373, 397, XP055721489 |
ANONYMOUS: "pure hydraulic cold strip rolling mill for A/S Nordisk Aluminiumindustri", DAVY, 1973, pages 1 - 2, XP055721505 |
DENEUVILLE PATRICK: "Mise en Forme de l'aluminium - laminage", TECHNIQUES DE L'INGÉNIEUR -REF M314, 10 June 2010 (2010-06-10), pages 1 - 27, XP055421826 |
H. F. ATALA ET AL.: "Surface roughness changes during rolling", WEAR, vol. 32, 1975, pages 249 - 268, XP055721491 |
MOREAS, GENEVIEVE: "Advanced sensor for on-line topography in continuous lines", REVUE DE METALLURGIE- CAHIERS D'INFORMATIONS TECHNIQUES, vol. 103, no. 5, 2006, pages 233 - 237, XP009150783 |
Also Published As
Publication number | Publication date |
---|---|
JP2018506433A (en) | 2018-03-08 |
US20170355002A1 (en) | 2017-12-14 |
JP6452212B2 (en) | 2019-01-16 |
WO2016124447A1 (en) | 2016-08-11 |
US10751773B2 (en) | 2020-08-25 |
CN107995881A (en) | 2018-05-04 |
KR20170113642A (en) | 2017-10-12 |
DE102015101580B3 (en) | 2016-06-02 |
EP3253505A1 (en) | 2017-12-13 |
KR102046588B1 (en) | 2019-11-19 |
CN113732063A (en) | 2021-12-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2334492C2 (en) | Device for the continuous control of the flatness and parallelism of rolling stock surfaces | |
EP1781429B1 (en) | Method for straightening a metal strip and straightening machine | |
DE3038865C1 (en) | Roll stand with axially movable rolls | |
DE112005002080B4 (en) | Process for the design of a roll profile and steel roll with a curve of the roll profile expressed in the form of a polynomial function | |
DE3419261C2 (en) | ||
EP1307302B1 (en) | Roll stand comprising a crown-variable-control (cvc) roll pair | |
EP3253505B1 (en) | Method and apparatus for embossing rolling metal strip | |
DE19719318C2 (en) | Process for influencing the belt contour in the edge area of a roller belt | |
EP0121148B1 (en) | Method of making hot rolled strip with a high quality section and flatness | |
EP1879706B1 (en) | Method of rolling a metal strip | |
DE60124064T2 (en) | Rolling mill and rolling process using the same | |
DE3431691A1 (en) | ROLLING MILLS FOR BAND SHAPED MATERIAL | |
EP1368143B1 (en) | Method for specifically adjusting the surface structure of rolling stock during cold rolling in skin pass mills | |
DE3522631C2 (en) | ||
DE2648864A1 (en) | METAL EXTRUSION PROCESS WITH HIGH THICKNESS REDUCTION | |
EP1786577B1 (en) | Method for milling a metal strip | |
EP3917694B1 (en) | Local varying of the roll gap in the area of the edges of a rolled strip | |
DE102010049908B4 (en) | Cluster-type multi-roll mill | |
DE2848295C2 (en) | Calender for the production of thermoplastic films | |
EP3685930B1 (en) | Local varying of the roll gap in the area of the edges of a rolled strip | |
DE69226690T3 (en) | SIX-ROLLER MILL | |
DE60010803T2 (en) | Method and device for rolling a strip | |
DE10041563A1 (en) | Method and device for straightening cold rolled strip and regulating the degree of stretch | |
EP1699573B1 (en) | Combined operating modes and frame types in tandem cold rolling mills | |
DE19903926A1 (en) | Process and plant for forming metal strips |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20170721 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20190123 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP Ref country code: CH Ref legal event code: NV Representative=s name: SCHMAUDER AND PARTNER AG PATENT- UND MARKENANW, CH Ref country code: AT Ref legal event code: REF Ref document number: 1152974 Country of ref document: AT Kind code of ref document: T Effective date: 20190715 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502016005454 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20190710 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191010 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191111 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191010 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191110 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191011 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R026 Ref document number: 502016005454 Country of ref document: DE |
|
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 |
|
26 | Opposition filed |
Opponent name: SMS GROUP GMBH Effective date: 20200409 Opponent name: C-TEC CONSTELLIUM TECHNOLOGY CENTER / CONSTELLIUM NEUF-BRISACH Effective date: 20200407 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200224 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 |
|
PLAX | Notice of opposition and request to file observation + time limit sent |
Free format text: ORIGINAL CODE: EPIDOSNOBS2 |
|
PG2D | Information on lapse in contracting state deleted |
Ref country code: IS |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200126 |
|
PLBB | Reply of patent proprietor to notice(s) of opposition received |
Free format text: ORIGINAL CODE: EPIDOSNOBS3 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200126 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R081 Ref document number: 502016005454 Country of ref document: DE Owner name: SPEIRA GMBH, DE Free format text: FORMER OWNER: HYDRO ALUMINIUM ROLLED PRODUCTS GMBH, 41515 GREVENBROICH, DE |
|
RAP4 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: SPEIRA GMBH |
|
PLAB | Opposition data, opponent's data or that of the opponent's representative modified |
Free format text: ORIGINAL CODE: 0009299OPPO |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 |
|
R26 | Opposition filed (corrected) |
Opponent name: C-TEC CONSTELLIUM TECHNOLOGY CENTER / CONSTELLIUM NEUF-BRISACH Effective date: 20200407 |
|
APAH | Appeal reference modified |
Free format text: ORIGINAL CODE: EPIDOSCREFNO |
|
APBM | Appeal reference recorded |
Free format text: ORIGINAL CODE: EPIDOSNREFNO |
|
APBP | Date of receipt of notice of appeal recorded |
Free format text: ORIGINAL CODE: EPIDOSNNOA2O |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190710 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: HC Ref document number: 1152974 Country of ref document: AT Kind code of ref document: T Owner name: SPEIRA GMBH, DE Effective date: 20220711 |
|
APBQ | Date of receipt of statement of grounds of appeal recorded |
Free format text: ORIGINAL CODE: EPIDOSNNOA3O |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230519 |
|
APBU | Appeal procedure closed |
Free format text: ORIGINAL CODE: EPIDOSNNOA9O |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20240125 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20240123 Year of fee payment: 9 Ref country code: GB Payment date: 20240123 Year of fee payment: 9 Ref country code: CH Payment date: 20240202 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20240124 Year of fee payment: 9 Ref country code: FR Payment date: 20240124 Year of fee payment: 9 Ref country code: BE Payment date: 20240123 Year of fee payment: 9 |
|
PLCK | Communication despatched that opposition was rejected |
Free format text: ORIGINAL CODE: EPIDOSNREJ1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: OPPOSITION REJECTED |