WO2020201072A1 - Dispositif de refoulement pour feuillard métallique et son procédé de fonctionnement - Google Patents

Dispositif de refoulement pour feuillard métallique et son procédé de fonctionnement Download PDF

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Publication number
WO2020201072A1
WO2020201072A1 PCT/EP2020/058683 EP2020058683W WO2020201072A1 WO 2020201072 A1 WO2020201072 A1 WO 2020201072A1 EP 2020058683 W EP2020058683 W EP 2020058683W WO 2020201072 A1 WO2020201072 A1 WO 2020201072A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal strip
hold
upsetting
edging
down element
Prior art date
Application number
PCT/EP2020/058683
Other languages
German (de)
English (en)
Inventor
Stefan Wendt
Michael Lipowski
Heinz-Adolf MÜLLER
Original Assignee
Sms Group Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sms Group Gmbh filed Critical Sms Group Gmbh
Publication of WO2020201072A1 publication Critical patent/WO2020201072A1/fr

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Classifications

    • 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
    • B21B13/06—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged vertically, e.g. edgers
    • 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
    • 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
    • B21B1/224—Edge rolling of flat products

Definitions

  • the present invention relates to an upsetting device for a metal strip, a rolling train comprising the upsetting device according to the invention and a method for upsetting rolling a metal strip.
  • the maximum possible decrease in width (dB), i.e. the difference between the width of the metal strip before the edging rolling and the width of the metal strip after the edging rolling, in relation to the piercing thickness of the metal strip, is limited in conventional upsetting devices. If the metal strip is compressed too much, the metal strip can buckle during the compression rolling, so that the target width is not achieved and thus quality losses and production restrictions are possible. In practice, for example, it has been shown that the metal strip bulges with a reduction in width (dB) of 0.30 times the thickness of the metal strip.
  • slab sizing is a discontinuous process that is used to reduce the width of raw slabs comes.
  • the upsetting tool performs a lateral upsetting of the semi-finished product in a rocking movement. Upsetting is therefore - in terms of forming technology - a forging process. With each adjustment / detachment of the upsetting press tool, a swelling load is exerted on the edge of the slab, which increases the risk of the semi-finished product buckling.
  • the present invention is based on the object of specifying an upsetting device, a rolling train and a method for upsetting rolling which can be adapted to changing dimensions of the metal strips to be processed with less effort.
  • the present invention relates to an upsetting device for a metal strip having at least two rotationally symmetrical upsetting rollers arranged opposite each other transversely to the transport direction of the metal strip for continuous upsetting rolling of the metal strip, at least one which is arranged between the two upsetting rollers and is height-adjustable via an actuator Hold-down element with which the metal strip can be held down in the event of a decrease in width (dB) by a factor of at least 0.30 times the metal strip thickness.
  • dB decrease in width
  • the upsetting device according to the invention allows metal strips to be edged in a particularly wide parameter window, so that changing dimensions of the metal strips to be processed can be implemented. From a width reduction (dB) of 0.30 times the metal strip thickness, the frequency of bulges increases significantly, with parameters such as e.g. The metal strip strength, the temperature homogeneity of the metal strip, the friction have an influence. In the case of width reductions in the regular range, that is, below the risk value of 0.30 times the metal strip thickness, the upsetting device according to the invention allows width reductions without adjustment or with only forceless adjustment of the claimed hold-down device.
  • width reductions above 0.30, in particular from 0.50 to 0.80 times the metal strip thickness, in which bulges would often occur without the use of the hold-down element can be realized by the upsetting device according to the invention with use of the hold-down element without bulging of the metal strip.
  • the upsetting device according to the invention preferably has upsetting rollers which are designed as caliber rollers.
  • the deformations or bulges that occur at the edges of the metal strip as a result of large reductions in width can be compensated for particularly effectively by combining the use of the hold-down element with caliber rollers via the conical end sections of the caliber roller.
  • the upsetting device is limited for technological reasons. Therefore, the maximum possible decrease in width (dB) is 3 times the metal strip thickness, more preferably a maximum of that 2.5 times the metal strip thickness, furthermore preferably 2 times the metal strip thickness and most preferably 1.5 times the metal strip thickness.
  • the term “upsetting” or “upsetting rollers” is understood in the context of the present invention to mean a reduction in the width of the metal strip.
  • the upsetting device according to the invention is also suitable to the same extent for upsetting rolling sheet metal or heavy metal sheets.
  • the two rotationally symmetrical edging rolls are designed as caliber rolls, each of the caliber rolls comprising a cylindrical main section and two conical end sections arranged on each side of the cylindrical main section.
  • the cylindrical main section is characterized in that its surface line extends parallel to the axis of rotation of the caliber roller.
  • the preferred embodiment as a caliber roller is characterized by particularly good guiding properties.
  • the two rotationally symmetrical edging rolls are designed as caliber rolls, each of the
  • Caliber rolling comprises an at least partially, particularly preferably completely, conical main section and two conical end sections arranged on each side of the at least partially conical main section.
  • the main conical section is distinguished by the fact that its surface line is inclined at an acute angle to the axis of rotation of the caliber roller.
  • the height of the preferably cylindrical or preferably partially, particularly preferably completely, conical main section of the caliber roller is based on the metal strip thickness, the decrease in width and the force with which the hold-down element is positioned on the metal strip. Particular attention must be paid to avoiding compression beads on the metal strip and its edge.
  • the hold-down element preferably comprises a hold-down roller for rolling on the metal strip and / or a sliding surface for sliding on the metal strip. If the hold-down element comprises a hold-down roller, this can be designed in the form of a non-driven hold-down roller.
  • a rotary drive can be provided for this. The rotary drive can be used to adapt the circumferential speed of the hold-down roller - preferably before it is placed on the metal belt - to the transport speed of the metal strip and thus to minimize the friction between the hold-down roller and the metal belt.
  • the actuator via which the hold-down element can be adjusted in height, can for example be driven hydraulically.
  • it can be a hydraulic cylinder.
  • An electromechanical drive is also conceivable. With a hydraulic drive, in particular, a force-controlled adjustment of the hold-down element to the metal strip can be easily implemented. In contrast to this, an electromechanical drive can simplify a position-controlled adjustment of the hold-down element to the metal strip.
  • the upsetting device may have a force and / or position regulating device, within which a control signal is generated in each case for controlling the actuator.
  • the upsetting device can have a table for supporting the metal strip on the side of the metal strip opposite the hold-down element.
  • the table has at least one, preferably a plurality of table rollers.
  • the table has at least one sliding element with a sliding surface.
  • the upsetting device has a cooling device.
  • the cooling device can in particular be provided to cool the hold-down element and to reduce its thermal wear to decrease.
  • the cooling device can in particular be designed to cool the hold-down element from the inside, so that wetting of the metal strip or sheet to be rolled with cooling fluid can be reduced to a minimum.
  • the cooling device can also be designed for external cooling of the hold-down element. External cooling can be more easily implemented structurally.
  • the two edging rolls and the hold-down element which can be adjusted in height via the actuator are arranged in a common edging roll stand. This results in a particularly simple and space-saving structure.
  • a control device is provided as a component of the control device, via which the hold-down element can be controlled.
  • the upsetting device has a detector for determining the entry strip thickness of the metal strip before it enters the upsetting device, which detector can be forwarded to the control device using signals.
  • the strip thickness can be transmitted from a higher-level system to the control device.
  • a calculation device assigned to the hold-down element is advantageously provided, which is coupled to the control device for signaling purposes. The computation device receives the input strip thickness and the planned reduction in width to be carried out by the upsetting device as input variables.
  • the degree of bulging in relation to the planned decrease in width (dB) can then be determined via the calculation device, so that the hold-down element can be optimally positioned against the metal strip in accordance with the respective specification.
  • the degree of bulging can take place, for example, in accordance with the material properties of the metal strip, if the material properties are fed to the calculation device as a further optional input variable. This means that material properties relevant to forming technology, such as strength, temperature, etc. can be included in the calculation.
  • a Position detector is provided which is coupled to the control device for signaling purposes.
  • the head and / or end area of the metal strip is determined via a position detector before it is passed through the at least two rotationally symmetrical edging rollers, in order to activate the hold-down device when the head of the metal strip is detected, or against the metal strip especially if, in addition, the reduction in width during edging is a factor of at least 0.30 times the metal strip thickness.
  • the hold-down device is deactivated again or lifted from the metal strip, taking the belt speed into account.
  • the present invention relates to a rolling train comprising at least one roll stand for rolling the metal strip and at least one upsetting device according to the invention arranged upstream or downstream of the roll stand in the transport direction of the metal strip.
  • a rolling train typically has several rolling stands.
  • the upsetting device described above can be arranged between two roll stands of the rolling train.
  • the rolling train can, however, also have only a single rolling stand.
  • the upsetting device can then be provided before or after the individual roll stand.
  • the present invention relates to a method for edging a metal strip.
  • the method here comprises the following steps: a) edging of the metal strip by continuously guiding the metal strip between at least two rotationally symmetrical edging rolls arranged opposite one another transversely to the transport direction of the metal strip; and b) adjusting at least one arranged between the two rotationally symmetrical edging rollers and adjustable in height via an actuator Hold-down element against the metal strip as soon as the reduction in width during edging reaches a factor of at least 0.30 times the metal strip thickness.
  • the process according to the invention is preferably a hot rolling process.
  • the adjustment of the at least one hold-down element, which can be adjusted in height by means of the actuator, is preferably effected via a signal generated by the control device.
  • the at least one hold-down element is preferably actuated in a force- and / or position-controlled manner via the actuator.
  • the force and / or the position can be calculated using the calculation unit.
  • the actual force with which the at least one hold-down element is placed against the metal strip and / or the actual position at which the at least one hold-down element is placed against the metal strip is monitored and that the at least one
  • Hold-down element is reset over a predetermined distance when the actual force exceeds a predetermined force threshold value and / or the actual position exceeds a predetermined target position.
  • the monitoring enables qualitative monitoring as well as protection against overload damage.
  • FIG. 2 shows the upsetting device shown in FIG. 1 in a top view
  • FIG. 3 shows the upsetting device shown in FIG. 1 in a (front) view
  • FIG. 4 shows an illustration of an edging roller in a front view.
  • a section of a rolling train 1 with a first horizontal rolling stand 2 and a second horizontal rolling stand 3 is shown by way of example.
  • the metal strip 4 for example a
  • Upsetting device 9 arranged.
  • the upsetting device 9 has two rotationally symmetrical upsetting rollers 11, 12, arranged opposite one another transversely to the transport direction 10 of the metal strip 4, for the continuous upsetting rolling of the metal strip 4.
  • Both edging rollers 1 1, 12 can be designed as conventional edging rollers 1 1.1, 12.1.
  • Upsetting rollers 1 1.1, 12.1 designed in this way have an essentially cylindrical body, as shown by the dashed illustration 11.1, 12.1.
  • the two edging rollers 11, 12 are preferably designed as caliber rollers 1 1.2, 12.2 and each comprise a cylindrical main section 13 and two conical end sections 14, 15 arranged on each side of the cylindrical main section 13.
  • the two edging rollers 1 1, 12 can be designed as caliber rollers 1 1.3, 12.3 and each comprise a conical main section 13.1 and two conical end sections 14.1, 15.1 arranged on each side of the conical main section 13.1 (FIG. 4).
  • the upsetting device 9 comprises a hold-down element 17, which is arranged between the two upsetting rollers 1 1, 12 and is height-adjustable via an actuator 16, with which the metal strip 4, when the width decreases (dB) by a factor of at least 0.30 times the metal strip thickness , can be held down in order to prevent the metal strip 4 from buckling.
  • the hold-down element 17 can have a hold-down roller for rolling on the metal strip 4 and / or a sliding surface for sliding on the metal strip 4.
  • the hold-down element 17 is designed in the form of a non-driven hold-down roller.
  • the actuator 16 via which the hold-down roller 17 can be adjusted in height, is hydraulically driven in the embodiment variant shown, an electromechanical drive also being conceivable.
  • a guide link (not shown) can be provided for more stable guidance of the hold-down element 17 through the actuator 16.
  • the backdrop can also enable component separation and simplifies the assembly situation for maintenance and repair purposes.
  • a cooling device can also be provided.
  • the cooling medium can be fed inside and / or outside to the hold-down element or the hold-down roller 17.
  • the shown upsetting device 9 has a table 18 for supporting the on the side of the metal strip 4 opposite the hold-down roller 17 Metal band 4 on.
  • the table 18 here comprises a table roller 19 which can be positioned against the metal strip 4 from below.
  • the upsetting device 9 comprises a control device 21 via which the hold-down element 17 can be controlled.
  • a detector 22 for determining a strip thickness of the metal strip 4 is coupled to this control device 21 for signaling purposes.
  • a position detector 23 is provided, which is also coupled with the control device 21 for signaling purposes. Via the position detector 23, the head and / or the end area of the
  • the hold-down element 17 is positioned in a targeted manner against the metal strip 4 as soon as the reduction in width during edging reaches a factor of at least 0.30 times the metal strip thickness. Furthermore, a calculation device 24 is provided which is coupled to the control device 21 for signaling purposes.
  • the degree of bulging in relation to the planned decrease in width (dB) can be determined via the calculation device, so that the hold-down element 17 can be optimally adjusted according to the respective specification of the metal strip 4.
  • the degree of bulging can take place, for example, in accordance with the material properties of the metal strip. This means that material properties relevant to forming technology, such as strength, temperature, etc.
  • the then upset-rolled metal strip 4 has a second piercing thickness 25 that is greater than the first end thickness 6.
  • Metal strip 4 is again reduced in its thickness, starting from the second piercing thickness 25 to a second final thickness 26.
  • the upsetting device 9 according to the invention allows for upsetting rolling of metal strips 4 in a particularly wide parameter window, so that changing dimensions of the metal strips 4 to be processed can be realized.
  • the upsetting device 9 according to the invention also allows width reductions (dB), depending on the variant. beyond the maximum possible value of at least 0.30, preferably of at least 0.50. The bulges that form within the metal strip 4 with these greater decreases in width are effectively compensated for using the hold-down element 17.
  • FIG. 4 shows the three different embodiment variants of the rotationally symmetrical edging rollers 1 1, 12 in a combined schematic representation.
  • the two rotationally symmetrical upsetting rollers 1 1, 12 can essentially be formed from a cylindrical body.
  • the two rotationally symmetrical edging rollers 1 1, 12 are designed as caliber rollers 1 1.2, 12.2.
  • the main section 13 itself is cylindrical.
  • the main section 13 can be at least partially, preferably completely, conical, as can be seen from the dashed illustration 11.3, 12.3.
  • the main conical section is characterized in that its surface line is inclined at an acute angle ⁇ to the axis of rotation of the caliber roller 11.3, 12.3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

La présente invention concerne un dispositif de refoulement (9) pour un feuillard métallique (4), présentant au moins deux cylindres de refoulement (11, 12) symétriques en rotation disposés l'un en face de l'autre transversalement par rapport au sens de transport (10) du feuillard métallique pour effectuer un laminage continu par refoulement du feuillard métallique (4) ; au moins un élément serre-flan (17) disposé entre les deux cylindres de refoulement (11, 12) et réglable en hauteur via un organe de réglage (16), qui permet de maintenir vers le bas le feuillard métallique (4) lors d'une réduction de la largeur d'un facteur d'au moins 0,30 fois l'épaisseur du feuillard métallique. L'invention concerne en outre un laminoir (1) ainsi qu'un procédé pour le laminage par refoulement d'un feuillard métallique (4).
PCT/EP2020/058683 2019-04-03 2020-03-27 Dispositif de refoulement pour feuillard métallique et son procédé de fonctionnement WO2020201072A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102019204777.7 2019-04-03
DE102019204777 2019-04-03
DE102020203748.5A DE102020203748A1 (de) 2019-04-03 2020-03-24 Stauchvorrichtung für ein Metallband und Verfahren zu deren Betrieb
DE102020203748.5 2020-03-24

Publications (1)

Publication Number Publication Date
WO2020201072A1 true WO2020201072A1 (fr) 2020-10-08

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PCT/EP2020/058683 WO2020201072A1 (fr) 2019-04-03 2020-03-27 Dispositif de refoulement pour feuillard métallique et son procédé de fonctionnement

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DE (1) DE102020203748A1 (fr)
WO (1) WO2020201072A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3984662A1 (fr) * 2020-10-19 2022-04-20 SMS Group GmbH Table de transfert à rouleaux et cadre de cylindre d'écrasement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5338265B1 (fr) 1970-04-21 1978-10-14
JPS62118933A (ja) 1985-11-19 1987-05-30 Ishikawajima Harima Heavy Ind Co Ltd 座屈防止装置
JPS6313612A (ja) 1986-07-04 1988-01-20 Ishikawajima Harima Heavy Ind Co Ltd バ−チカルエツジヤ−の押えロ−ル装置
JPS63119918A (ja) * 1986-11-10 1988-05-24 Ishikawajima Harima Heavy Ind Co Ltd バ−チカルエツジヤ−の押えロ−ルシフト装置
JPH02280905A (ja) * 1989-04-18 1990-11-16 Ishikawajima Harima Heavy Ind Co Ltd 幅圧延装置
JP2015123486A (ja) 2013-12-27 2015-07-06 Ｊｆｅスチール株式会社 スラブ幅圧下方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5338265B1 (fr) 1970-04-21 1978-10-14
JPS62118933A (ja) 1985-11-19 1987-05-30 Ishikawajima Harima Heavy Ind Co Ltd 座屈防止装置
JPS6313612A (ja) 1986-07-04 1988-01-20 Ishikawajima Harima Heavy Ind Co Ltd バ−チカルエツジヤ−の押えロ−ル装置
JPS63119918A (ja) * 1986-11-10 1988-05-24 Ishikawajima Harima Heavy Ind Co Ltd バ−チカルエツジヤ−の押えロ−ルシフト装置
JPH02280905A (ja) * 1989-04-18 1990-11-16 Ishikawajima Harima Heavy Ind Co Ltd 幅圧延装置
JP2015123486A (ja) 2013-12-27 2015-07-06 Ｊｆｅスチール株式会社 スラブ幅圧下方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3984662A1 (fr) * 2020-10-19 2022-04-20 SMS Group GmbH Table de transfert à rouleaux et cadre de cylindre d'écrasement

Also Published As

Publication number Publication date
DE102020203748A1 (de) 2020-10-08

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