US3769826A - Apparatus for rolling metal strip - Google Patents
Apparatus for rolling metal strip Download PDFInfo
- Publication number
- US3769826A US3769826A US00250343A US3769826DA US3769826A US 3769826 A US3769826 A US 3769826A US 00250343 A US00250343 A US 00250343A US 3769826D A US3769826D A US 3769826DA US 3769826 A US3769826 A US 3769826A
- Authority
- US
- United States
- Prior art keywords
- rollers
- strip
- roller
- systems
- mainshaft
- 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.)
- Expired - Lifetime
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 49
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 12
- 239000002184 metal Substances 0.000 title claims abstract description 12
- 238000005266 casting Methods 0.000 description 8
- 230000009467 reduction Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
Images
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
- B21B13/18—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for step-by-step or planetary rolling; pendulum mills
- B21B13/20—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for step-by-step or planetary rolling; pendulum mills for planetary rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
-
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- 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
- B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
- B21B2035/005—Hydraulic drive motors
-
- 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
- B21B31/07—Adaptation of roll neck bearings
- B21B31/076—Cooling; Lubricating roller bearings
Definitions
- the disclosed apparatus for rolling metal strip comprises a driven rotary roller system on both sides of the strip to be worked;
- Each roller system comprises a mainshaft and at least two rollers rotatably mounted on this mainshaft parallel to the latter and rotatable from a special drive through the agency of friction clutches.
- the rollers in each system are uniformly distributed around the respective mainshaft and at the same radial distance from the latter.
- the mainshafts and roller systems are synchronously driven in relatively opposite directions, and the rollers in the two systems are so arranged that they meet the strip in pairs, one from each system, on the two sides of the strip,
- the strip is fed between the two roller systems by two driven feed rollers having a weight sufficient to absorb vibrations which are set up in the metal strip by the action of the roller systems.
- the apparatus here proposed for this purpose is however much simpler as a result of which its installation and operating costs are considerably smaller, and it also has substantially more favourable economical features in relation to known plants of this character. Moreover, strips of any width can be handled, so that the range of utilisation of the apparatus is correspondingly greater.
- the apparatus comprises two driven feed rollers, the weight of which is about 80 to I kp per centimetre strip width, and a rolling assembly, and it is characterised by the fact that this assembly comprises a driven rotary roller system on both sides of the strip to be worked, each such system comprising a mainshaft rotatable in bearing blocks at the two ends which are adjustable relatively to one another, and at least two rollers rotatably mounted on this mainshaft parallel to the latter and rotatable from a special drive through the agency of friction clutches, the width of these rollers being greater than that of the strip which is to be worked, the rollers being all uniformly distributed around the mainshaft and at the same radial distance from the latter, and the mass of the rollers being selected so that the centrifugal force produced by the rotation thereof around the main axis of the roller system concerned is approximately equal to one half the maximum rolling force which is produced, the mainshafts and roller systems being synchronously driven in relatively opposite directions and so coupled together that, by virtue of the rotary
- FIG. 1 is a side view of the actual rolling assembly of the apparatus
- FIG. 2 is an end view, partly in section of the rolling assembly of FIG. 1, and
- FIG. 3 illustrates the drive means for the rolling assembly.
- Two feed rollers l and 2 driven at uniform speed, are provided in the illustrated apparatus for advancing the strip B which is to be worked, and which for example arrives from a continuously operating casting machine.
- Gripper rollers 1 and 2 advance the strip in the direction of arrow P, towards the rolling mill (FIGS. 1 and 2) adjoining a casting machine.
- vibrations set up during the rolling procedure are desirably not transmitted back into the casting machine. For this reason it is necessary for the feed rollers l and 2 to be dimensioned so that they are of a sufficient mass for the incident vibrations to be practically completely absorbed.
- the feed rollers must therefore have a mass of approximately to kg per cen timetre strip width depending on the resistance to deformation prevailing in the area of the strip which is to be deformed and on the reduction ratio.
- the roller driving gear is infinitely adjustable to enable the speed of the strip to be accurately set to the prevailing conditions.
- the strip is deformed between two rotating roller systems of the rolling assembly which are synchronously driven in opposite directions and are disposed symmetrically in relation to the strip to be worked (FIGS. 1 and 2).
- these systems are constituted as follows:
- the actual working rollers 5, 6, which are somewhat wider than the strip of maximum width to be worked, are arranged on main shafts 3, 4 so as to be disposed parallel to these latter.
- the rollers 5 6 are of like form and are distributed uniformly around the main shafts with their centres at a distance R from the axes of the latter, being rotatable in special bearings 42 mounted on these mainshafts. Aside from these bearings there is no contact between the rolls and the mainshafts.
- FIG. 1 shows that the two roller systems each comprise four rollers and 6 respectively. It will be understood that in principle there may be two or three rollers only in each system, or more than four rollers.
- the distance D separating the axes of the two main shafts 3 and 4 from one another is so chosen that during the rotation of the two systems the rollers 5 and 6 approach to within a distance a between one another corresponding to the required thickness of the reduced strip.
- the driving means for the two rolling systems can be coupled in such a way as to meet the requirements that a pair of rollers, one from each of the two systems, meet the strip simultaneously and at the same angles and thence roll the strip down between them and deform it at an appropriate pressure until the minimum distance between the rollers is reached. As the systems turn the rollers subsequently part and meet together again against the strip after one rotation of the systems.
- each roller pair of the roller systems comes into rolling engagement, whereby successive elements in the body of the strip are reduced to the required thickness.
- the main shafts 3 and 4 are mounted in bearing blocks l7, 18 which are adjustable relatively to one another to enable the thickness of the deformed strip to be set to the required amount a.
- roller systems are rotated by their drive means in the direction of arrow P before the strip to be worked is introduced into the rolling mill at the start of the operation.
- rollers 5 and 6 are set into rotation in the direction of arrow P by a special driving means to avoid undesirable stresses arising from an excessive angular acceleration at the commencement of a rolling operation.
- the rate of rotation of the rollers is infinitely variable and is adjusted so that the component of the velocity on the surface of the rollers in the direction of the strip, resulting from the rotation of the individual rollers and the whole roller system, corresponds to the speed of advance of thestrip B.
- Rate of rotation of the roller system n 200 to 800 per minute.
- the rate of travel of the strip determines the required number of rolling engagements per unit time, and this is represented by the product of the rate of rotation and the number of rollers per roller system.
- Optimum deformation conditions are fulfilled when the mean advance of the deformed strip per roller engagement is about 0.5 to two times the thickness thereof.
- the feet of the machine are not illustrated in FIG. 2.
- the feed rollers l and 2 are driven by way of intermediate shafts 7 and 8 which have keyed thereon pinions 9 and 10 which engage with toothed rings 11 and 12 screwed to rollers l and 2.
- Rollers l and 2 are rotatably mounted on fixed shafts la and 2a which are mounted in robust plummer blocks 14 and 15 which are displaceable on the machine frame 13.
- Two double acting hydraulic cylinders 16 are provided at the two ends of the rollers to produce the gripping force thereof and these are so dimensioned as to be capable of clamping the strip sufficiently powerfully to avoid any slip during the rolling in the ensuing working process.
- the forces required for this purpose can actually slightly reduce the strip thickness between the rollers under certain conditions.
- the cylinders are also used to vary the distance between the rollers for the introduction or removal of the strip.
- the two roller systems which actually perform the reduction or deforming of the strip each comprise, as is apparent from FIGS. 1 and 2, a mainshaft 3 or 4, respectively, the bearing bodies 42 which are rigidly connected thereto, the rollers 5 or 6 respectively which are eccentrically mounted at a distance R from the axis of the mainshaft concerned, and the driving means described below.
- the mainshafts 3 and 4 are rotatably mounted at the two sides of the machine frame 13 in bearing blocks 17 and 18 which are displaceable in slideways.
- the two roller systems are rotated by a main motor 19 through a reduction gear and pinion stand 20 and cardan shafts 21 and 22.
- Rollers 5 and 6 are rotated by separate drive means, these merely serving to accelerate the rollers while the machine is being started to compensate for frictional forces in the bearings.
- the rollers can be driven from one end or, as shown by FIG. 2, for symmetrical reasons from both ends. In the present instance use is made of an oil hydraulic system and it will be observed that there is a hydraulic pump 23 driven by the main motor and given an infinitely variable rate of feed and two hydraulic motors 24 and 25, connected in parallel, fed from pump 23.
- the roller drive means are interconnected through two gearings 25 and 27 through a shaft 28, to ensure a uniform rate of rotation of the rollers of the two roller systems even during idle running.
- the drive is imparted from gearings 26 and 27 through cardan shafts 29 and 30 mintermediate shafts 33 and 34 rotating in bearings 31 and 32, and thence through toothed belts 35 and 36 to toothed collars 37 on mainshafts 3 and 4. Thence the drive is imparted to the toothed pinions 38 on the roller spindles which engage the toothed collars 37.
- the strip B passes through the apparatus in the horizontal direction, it will be appreciated that the apparatus can be devised for an inclined or reversing direction of travel, and indeedany desired direction of travel upwards or downwards can be catered for.
- the method of driving the rollers illustrated and described merely represents one of various possibilities. lt is for example possible to conduct this drive without the use of belts and using only appropriate toothed gearing.
- friction clutches with an appropriately selected torque may be associated with the toothed pinions 38.
- the thickness a ofthe rolled strip, given specific dimensions of the roller systems, is determined by the axial spacing D of the mainshafts.
- the rate of deformation of the strip can be varied within desired limits by adjustment of the length of the threaded spindles 40. This enables a uniform thickness of strip to be achieved at both sides of the latter.
- the bearing blocks 17 and 18 are urged by hydraulic cylinders 39, arranged at the two sides thereof and numbering four in all, against the threaded spindles 40 which are arranged between the bearing blocks and are of adjustable effective length.
- the closing pressure exerted by the cylinders must be larger than the rolling pressure exerted between the roller pair which are cooperating during the rolling procedure. This closing pressure can be checked by known limiting means to ensure against overstraining of the rolling systems.
- the adjustment of the bearing blocks that is to say the regulation of the distance between them, can be performed by other means such as are used in the rolling mill art.
- the main bearings 41 of the rolling systems and the roller bearings 42 can be lubricated by pressure oil through oil ducts 44 in the main bearings. Thence the used oil passes through the run-out connections 46 into an oil storage plant (not shown) comprising a cooler filter and tank. The major part of the oil is introduced into the bearings 42 by ducts present in the main shafts and bearings. Used lubiricating oil emerging laterally from these is collected in the shell 46 and thence passed in each case through a connection47 and conduits (not shown) likewise to the oil storage plant. Lubrication of the toothed wheels of the roller driving means and of bearings for which purpose roller bearings are used, is performed by the oil mist which prevails in the cavity concerned.
- a rolling oil-emulsion is continuously sprayed on to the rolling surfaces through nozzles 49 at the two sides of the strip.
- the plant illustrated in FIGS. 1 and 2 is intended for the treatment of continuously cast aluminium strips of about A 60 mm thickness to a 7mm at a strip speed of v 0.8 to 3.2 m/minute or v ca. 7 to 28 m/mi nute.
- a rate of rotation of n 500 'minutes is used and in each case four rolls per roller system. This gives 1 4 times 500 2000 roller engagements per minute.
- the totalmass of a roller amounts to M 625 kg.
- K' 100,000 52,400 47,600 kp or K/2 23,800 kp per bearing.
- the reduction in load on the bearings which results from the centrifugal force of the rollers also has the additional benefit of less bending strain on the rollers.
- An apparatus for rolling metal strip having two driven feed rollers, the weight of which is about to kp per centimetre strip width, and a rolling assembly, said rolling assembly comprising a driven rotary roller system on both sides of the strip to be worked, each such system comprising a mainshaft, bearing blocks at the two ends of said mainshaft which bearing blocks are adjustable relatively to one another and in which said mainshaft is rotatably supported, at least two rollers rotatably mounted on said mainshaft parallel to the latter and a special drive for rotating these rollers through the agency of friction clutches, the width of these rollers being greater than that of the strip which is to be worked, the rollers being all uniformly distributed around the mainshaft and at the same radial distance from the latter, and the mass of the rollers being selected so that the centrifugal force produced by the rotation thereof around the main axis of the roller system concerned is approximately equal to one half the maximum rolling force which is produced; and means being provided for synchronously driving said mainshafts and roller systems in relatively opposite dis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Abstract
Description
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH669371A CH522452A (en) | 1971-05-06 | 1971-05-06 | Device for rolling metal strip |
Publications (1)
Publication Number | Publication Date |
---|---|
US3769826A true US3769826A (en) | 1973-11-06 |
Family
ID=4313556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00250343A Expired - Lifetime US3769826A (en) | 1971-05-06 | 1972-05-04 | Apparatus for rolling metal strip |
Country Status (5)
Country | Link |
---|---|
US (1) | US3769826A (en) |
CA (1) | CA960067A (en) |
DE (1) | DE2222256C3 (en) |
FR (1) | FR2135235B1 (en) |
GB (1) | GB1372914A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180207696A1 (en) * | 2015-07-31 | 2018-07-26 | Sms Group Gmbh | Rolling stand for the rolling of rolling stock |
US20190001383A1 (en) * | 2015-07-31 | 2019-01-03 | Sms Group Gmbh | Rolling stand for the rolling of rolling stock |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH586576A5 (en) * | 1975-05-21 | 1977-04-15 | Lauener W F Ag |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2710550A (en) * | 1954-06-07 | 1955-06-14 | Armzen Company | Planetary reducing apparatus and process |
US2811060A (en) * | 1947-07-22 | 1957-10-29 | Tadeusz Sendizimir And Bertha | Planetary reducing mills |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE58762C (en) * | M. MANNESMANN in Remscheid-Bliedinghausen | Method and device for forming, rolling and sizing tubes and other hollow bodies | ||
US3138979A (en) * | 1959-07-29 | 1964-06-30 | Sendzimir Inc T | Construction and control of planetary mills |
AT271359B (en) * | 1964-06-29 | 1969-05-27 | Accuroll S A | Rolling process and planetary rolling mill for performing the process |
DE1813331A1 (en) * | 1968-12-07 | 1970-06-25 | Siemag Siegener Maschinenebau | Universal planetary rolling mill |
-
1972
- 1972-05-02 GB GB2032872A patent/GB1372914A/en not_active Expired
- 1972-05-03 DE DE2222256A patent/DE2222256C3/en not_active Expired
- 1972-05-03 FR FR7215624A patent/FR2135235B1/fr not_active Expired
- 1972-05-04 US US00250343A patent/US3769826A/en not_active Expired - Lifetime
- 1972-05-05 CA CA141,422A patent/CA960067A/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2811060A (en) * | 1947-07-22 | 1957-10-29 | Tadeusz Sendizimir And Bertha | Planetary reducing mills |
US2710550A (en) * | 1954-06-07 | 1955-06-14 | Armzen Company | Planetary reducing apparatus and process |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180207696A1 (en) * | 2015-07-31 | 2018-07-26 | Sms Group Gmbh | Rolling stand for the rolling of rolling stock |
US20190001383A1 (en) * | 2015-07-31 | 2019-01-03 | Sms Group Gmbh | Rolling stand for the rolling of rolling stock |
US10974297B2 (en) * | 2015-07-31 | 2021-04-13 | Sms Group Gmbh | Rolling stand for the rolling of rolling stock |
Also Published As
Publication number | Publication date |
---|---|
CA960067A (en) | 1974-12-31 |
DE2222256B2 (en) | 1980-03-27 |
FR2135235B1 (en) | 1976-10-29 |
GB1372914A (en) | 1974-11-06 |
DE2222256A1 (en) | 1972-11-23 |
DE2222256C3 (en) | 1985-01-10 |
FR2135235A1 (en) | 1972-12-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SOCIETE DE VENTE DE L'ALUMINIU, PECHINEY, 23 BIS, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ROLLCAT S.A.,;REEL/FRAME:004011/0683 |
|
AS | Assignment |
Owner name: ALUMINIUM PECHINEY, FRANCE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SOCIETE DE VENTE DE L'ALUMINIUM PECHINEY;REEL/FRAME:004301/0344 Effective date: 19840820 Owner name: CEGEDUR SOCIETE DE TRANSFORMATION DE L`ALUMINIUM P Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALUMINIUM PECHINEY, A CORP. OF FRANCE;REEL/FRAME:004301/0357 Effective date: 19840820 Owner name: ALUMINIUM PECHINEY, 23, RUE BALZAC- 75008 PARIS- F Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SOCIETE DE VENTE DE L`ALUMINIUM PECHINEY, A FRENCH CORP.;REEL/FRAME:004301/0344 Effective date: 19840820 Owner name: CEGEDUR SOCIETE DE TRANSFORMATION DE L'ALUMINIUM P Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ALUMINIUM PECHINEY;REEL/FRAME:004301/0357 Effective date: 19840820 |