US3362202A - Strip tensioning apparatus - Google Patents

Strip tensioning apparatus Download PDF

Info

Publication number
US3362202A
US3362202A US466899A US46689965A US3362202A US 3362202 A US3362202 A US 3362202A US 466899 A US466899 A US 466899A US 46689965 A US46689965 A US 46689965A US 3362202 A US3362202 A US 3362202A
Authority
US
United States
Prior art keywords
strip
rollers
roller
tension
slip
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
Application number
US466899A
Other languages
English (en)
Inventor
Gay Pierre Andre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie des Ateliers et Forges de la Loire SA
Original Assignee
Compagnie des Ateliers et Forges de la Loire SA
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 Compagnie des Ateliers et Forges de la Loire SA filed Critical Compagnie des Ateliers et Forges de la Loire SA
Application granted granted Critical
Publication of US3362202A publication Critical patent/US3362202A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/05—Stretching combined with rolling
    • 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
    • B21B1/222—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 in a rolling-drawing process; in a multi-pass mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F9/00—Straining wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F9/00—Straining wire
    • B21F9/005—Straining wire to affect the material properties of the wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F9/00—Straining wire
    • B21F9/007—Straining wire to induce a plastic deformation of the wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/10—Motor power; motor current
    • B21B2275/12—Roll torque
    • 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
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/08—Braking or tensioning arrangements

Definitions

  • sheet metal working plants it is often required to subject sheet and strip material to elongation and tension. This may be necessary for various purposes, such as planishing the sheet, or performing any of various operations on the sheet while in a state of tension, including inter alia alternate flexing of the tensioned sheet for simultaneously planishing and cold-working it, light rolling of the tensioned sheet in a skinpass roll mill, and the like.
  • Strip-tensioning apparatus as used for the above purposes generally comprises two sets of rollers rotatable on parallel, e.g. horizontal, axes.
  • the rollers in both sets are so disposed that a strip to be tensioned can be passed over a sinuous path around the rollers of a first set in frictional engagement with opposite surface arcs of said rollers, and then in similar fashion around the rollers of the other set.
  • the rollers of one set the one situated foremost along the direction of strip travel, are driven to feed the strip in that direction, while the rollers of the other, rearmost, set are driven in corresponding directions but at slightly lower velocities, or are braked, so as to impose a retarding force on the strip. In this manner the strip can be placed under substantial elastic tension in the region between the two sets of rollers.
  • the important factor generally is the degree of elongation imparted to the strip rather than the tension force developed therein. It is the degree of elongation percent, rather than the tension, that is directly related to the basic mechanical characteristic of the strip material, including elastic limit and tensile yield point. It is, consequently, important that during a strip tensioning process means be available for accuracy controlling the actual degree of elongation of the strip. Strip-tensioning machines of the prior art have been deficient in this respect.
  • su h conventional machines are so constructed that they must be operated to determine a certain value of tension, not elongation, in the sheet, or alternatively, it operated to impose a prescribed degree of elongation, they inevitably result in considerable slippage between the strip and the roller surfaces, causing damage to the surface condition of the sheet to a degree that is intolerable in many applications.
  • Objects of the present invention include the provision of improved sheetand strip-tensioning apparatus and improved drive and control systems therefor, possessing some or all of the following advantages:
  • the actual elongation in the strip imparted during the tensioning process is controllable to within close tolerances, in a simple and reliable manner.
  • Strip elongation can be maintained at any accurately prescribed value over a broad range without subjecting the strip to substantially any slippage against the roller surfaces.
  • the process is readily controllable through manual and/ or automatic means in order to vary the elongation and tension imparted to the strip while retaining optimal slipfree operation.
  • the drive system is simple and economical, requiring only a single prime mover to power all the rollers of both sets, and the entire system is reversible.
  • FIG. 1 is a diagrammatic view in elevation illustrating the devisl of a strip-tensioning process
  • FIG. 2 is a simplified plan view showing an improved strip-tensioning apparatus according to the invention.
  • FIG. 3 diagrammatically shows a set of rollers of the apparatus and serves to indicate certain quantities involved in the determination of the torque settings to be used in the slip couplings employed in the invention
  • FIG. 4 is a circuit diagram of a control circuit usable in controlling the apparatus of the invention.
  • FIG. 5 is a diagrammatic view, partly in plan and partly in circuit schematic form, illustrating one form of automatic control usable in the apparatus of the invention.
  • FIG. 1 the general operating principle of any strip-tensioning apparatus is illustrated.
  • Such apparatus basically includes two spaced sets of rollers a a and b b so disposed that a strip 1 can be fed over a sinuous path in frictional engagement with mutually opposed surface portions of successive rollers in each set.
  • the rollers of the foremost group b b are all rotated to impart this direction of feed to the strip.
  • the upper rollers b b and 11. should be rotated counterclockwise and the lower rollers b and [2 clockwise.
  • rollers of the rearmost group a -a are operated to impose a retarding force to the strip 1.
  • the rollers a a may be driven in the same directions as the corresponding rollers in the set b b but at slightly slower speeds to impart the desired retarding force, or said rollers ti -a may have braking torques applied thereto with generally similar results.
  • strip 1 will be subjected to tension and consequent elongation in the straight lap of its path of travel between rollers a and b
  • Any desired strip-working machine may be interposed in this section, such as a rolling mill, an alternate bending device, or any other machine serving to work the strip while in its tensioned and elongated condition.
  • rollers in each of the two sets il -L1 and b b may be geared together for rotation at corresponding angular speeds, and the two sets may be driven from a common motor or separate motors at the requisite differential speeds, with the group b rollers being driven in the same directions as but slightly slower than the group a rollers to impart the desired retarding force to the strip.
  • Such systems are advantageously simple, and they have a further important advantage in that they make it possible accurately and reliably to control the actual degree of elongation sustained by the strip between the two sets of driving and retarding rollers.
  • the elongation is proportional to the speed differential between the two sets of rollers, and since the rollers are positively driven the speed difference is well determined and accurately controllable.
  • such a drive system has had a very serious drawback in that slippage necessarily occurs between the strip and at least some of the rollers in each set.
  • a minor variation of the conventional drive system just described has involved imparting incrementally varying diameters to the successive rollers in each set, the diameters being increased from a to 6 and then decreased from 12 to b so as to cause corresponding incremental variations in the peripheral velocity of the rollers for taking up the aforementioned incremental variations in tension and thereby prevent slippage.
  • Such a known arrangement is capable at best of preventing slippage for one specific set of operating conditions, i.e. for one type of strip material (which determines the friction coefficient) one size of strip (determining the area of frictional contact), and one type of processing applied to the tensioned strip (determining the maximum tension of the strip). The arrangement therefore does not really solve the stated problem.
  • the other class of conventional power drive system referred to above has consisted in connecting each of the driving rollers b b to an individual drive motor, and each of the retarding rollers (1 to an individual braking generator or equivalent braking device. This of course makes it possible to proportion the driving and retarding torques applied to the individual rollers in such a way as to eliminate slippage completely.
  • another serious difficulty is introduced. Since in such a system it is the torque, rather than the velocity, of each roller that is positively determined by the system, the apparatus when thus driven will operate to impart a determined tension to the strip rather than a determined elongation.
  • the invention completely eliminates the above deficiencies of prior art strip-tensioning apparatus by providing an improved drive and control system for the rollers, as will now be described with reference to FIG. 2.
  • This figure shows in plan view the set of retarding rollers (l -a and the set of driving rollers b b Mounted on the shafts c of the retarding rollers a -a respectively in a manner later described, are meshing gears al -d and mounted on the shafts of the driving rollers 12 -12 are meshing gears e -e As here shown all the gears are substantially identical. Preferably however gear d has a pitch diameter slightly smaller than that of gears d d and gear e has a pitch diameter slightly larger than that of gears b -b As a result, it will be noted that roller a imparts substantially no additional increment of tension to the strip and roller [1 imparts substantially no decrement of tension.
  • the input gear c of the driving roller set is driven through bevel gearing fi-g from the output shaft of a motor h.
  • the motor output shaft is connected with the input gear of a differential gearing i, shown as a conventional bevel-gear epicyclic train, and the output of this differential, by way of a further bevel gearing g f drives the gear d associated with the output roller of the retarding set.
  • means are provided for controlling the rate of rotation of the spider of the differential, and as shown a worm gear k secured on the spider meshes with a worm j, which may be driven from any suitable means such as conventional speed variator .not shown.
  • a torque-limiting coupling device In In the drive shaft 0 of each of the rollers of both sets other than the output retarding roller a and input driving roller b a torque-limiting coupling device In is interposed.
  • the devices in may be any suitable type of torque limiter or slip clutch capable of automatic disengagement when the torque through it exceeds a prescribed, adjustable, value.
  • slip couplings m are of the powdermagnetic type disclosed in French Patents 973,367 and 988,971, wherein the limiting torque is substantially proportional to the energizing current applied to a winding of the coupling.
  • the differential spider i is rotated in a suitable direction at a slow rate by way of its control input j, then the forward angular velocity of the retarding rollers a a will be decreased by a corresponding small amount, and said rollers will exert the desired retarding force upon the strip.
  • the disclosed embodiment is reversible. In that strips can be fed there-through in either direction, and either of the two sets of rollers can be made to act as the driving set, or as the retarding set, merely by reversing the sense of rotation of the differential input j.
  • the system makes it possible to impart the desired elongation to the strip without subjecting the strip to relative slippage over any of the rollers of either set, ti -a or [l -b
  • the slip clutches m are preset so that each clutch will disengage for a particular, determinable value of the torque transmitted through it.
  • the torque values for which the various slip couplings m are set to yield are predetermined in each case so as to result in the minimum amount of slippage required to take up the difference in tension, and thereby utilize the drive capacity of motor h to a maximum degree.
  • the said preset yield torque of each slip coupling m is made somewhat less, by a safety coefiicient somewhat less than unity, than the theoretical value of the torque required to be applied to the particular roller under consideration in order to generate the corresponding incremental variation in the tension of the strip as the strip moves past said roller.
  • the five rollers I to V there shown may be considered as constituting, for example, the retarding rollers a a
  • the initial tension of the strip ahead of the input roller is t and designating by t t t t the successive tension values in the strip as measured immediately beyond the rollers :1 a a in
  • the theoretical values of the retarding torques which the rollers would have to apply in order to produce the incremental tension variations are In these expressions C C C C are the torques applied by the retarding rollers and R is the common roller radius.
  • each of the tension values t t t I is related to the preceding tension value by the following equations where f is the friction coefiicient of the strip on the roller surface, the alphas are the winding angles of the strip around the rollers (see FIG. 3), and e is the base of natural logarithms.
  • the initial tension t can, if desired, be expressed in terms of the final tension L; by applying the relations (2).
  • the above torque values C C C C can easily be calculated in each particular instance, and the slip couplings of each roller set a and b can then be preset in accordance with the calculated values to provide optimal operation, wherein: (a) a prescribed degree of elongation can be accurately imparted to the strip by controlling the rate of rotation of the differential spider i, (b) the strip will be free of any damaging slippage during its contact with any of the rollers, and (c) the power input of the system is utilized with maximum efiiciency.
  • the slip couplings used are of the type wherein the yield torque is proportional to the energizing current applied to the coupling.
  • all the slip couplings of each set are advantageously controlled through a common current control circuit such as the one shown in FIG. 4.
  • this circuit 13 14, 15, 16 represent the energizing windings of the four slip couplings m, connected in series with related variable resistors or potentiometers 17, 18, 19, 20.
  • the four series combinations are connected in parallel across a pair of energizing lines connected by way of a general adjustment potentiometer 12 with a constant current source 11.
  • resistors 1720 can be individually adjusted in accordance with the torque values as computed from Equations 3, whereby the desired operation will be obtained.
  • means are provided for automatically varying the values of the energizing current for the slip couplings m of each set in accordance with the tension applied to the strip, while maintaining said current values at all times proportional to the optimal yield torque values as determined by Equations 3.
  • the torque applied to the rigidly mounted roller of either (or each) set i.e. the output roller a of the retarding set or/ and the input roller b of the driving set, is measured directly on the roller shaft, as by means of a strain-gauge or other suitable torque-measuring device.
  • the resulting torque signal which is a measure of the final tension present in the strip beyond roller 12;, or ahead of roller b is applied as a control signal to vary the energizing currents to the slip couplings, without altering the proportionality relationships therebetween.
  • the left-hand shaft 0 represents either of the rigidly coupled shafts in FIG. 2, e.g. the shaft carrying the output retarding roller a
  • a torque-measuring device is illustrated as an assembly of four strain-gauges n bonded to a surface of the shaft between the roller and drive gear, and arranged in a balanced bridge circuit having its one (or input) diagonal connected by way of slip-rings O with a voltage source shown as including a DC source u and potentiometer p.
  • the other (output) diagonal of the strain-gauge bridge circuit is connected to sliprings 0 for providing an output voltage signal proportional to the torsional strain of the shaft as sensed by the strain gauges.
  • the output signal is applied to a first differential amplifier 11 which has one of its inputs connected to one of the sliprings 0 directly, and its other input connected to the other slipring 0 by way of a voltage source a" and potentiometer p", for conventional balancing purposes.
  • n Connected with the output of amplifier n are four potentiometers in parallel, p 7 1 2 only 2 being shown in the drawing. These four potentiometers are respectively associated with the energizing windings of the four slip couplings In.
  • slip couplings is shown at m in FIG. 5 mounted on its related shaft (cg. one of shafts u n, in FIG. 2), and only the connection of this slip coupling with its potentiometer will be described, it being understood that similar circuits are provided in respect to the other three slip couplings and related otentiometers.
  • Potentiometer 17 has its resistance terminal remote from the terminal connected to amplifier n grounded, and has its adjustable tap connected to one input of a further difierential amplifier q The output of amplifier q is connected to one input of a suitable firing circuit 1, having its other input grounded.
  • the firing circuit 1 has a pair of outputs connected with the control electrodes of respective controlled rectifier diodes r.
  • the diodes r have terminals of similar denomination connected to the ends of the secondary winding of a supply transformer, whose primary is connected across an A-C supply.
  • the other terminals of controlled diodes r are connected in common to a slipring O, which is connected with one end of the energizing winding, not shown, of slip coupling m. The other end of said energizing winding is connected through another slipring O to ground.
  • a midtap of the secondary of the supply transformer is connected through a shunt resistor s to ground, and is also connected to the second input of differential amplifier q to provide a stabilizing feedback connection.
  • a voltage signal from the strain gauge device representative of the torque of the rigid shaft of roller (1 and hence the final tension in the strip, is applied, after amplification in 12 to all four potentiometers p 12 11 p, in parallel.
  • a portion of this voltage signal, as determined by the setting of each said potentiometer, is applied through amplifier 1 to firing circuit t.
  • the firing circuit operates to control the rectifier diodes in proportion with the voltage applied to its input, and the rectifiers apply unidirectional current of accurately regulated intensity from the supply transformer to the control winding of slip coupling in.
  • differential gearing shown provides a preferred means for imparting the desired differential angular velocities to the positively driven rollers of the respective sets
  • other positive drive means capable of driving said rollers at the desired speeds
  • the yieldingly driven rollers may be connected with the source of mechanical power through other forms of drive transmission, provided these include the yielding connections or slip-couplings which form an essential feature of this invention.
  • Strip tensioning apparatus comprising:
  • positive drive means connected for rotating a roller in each set at accurately determinable different speeds so as to feed said strip past said sets while imposing a prescribed elongation to the strip as determined by the difference in said speeds;
  • Strip tensioning apparatus comprising:
  • two sets of rotatable rollers arranged to have a strip fed over a sinuous path in frictional engagement with the rollers of first one then the other set; a source of mechanical power; a positive drive connection from the power source to a roller of one of the sets;
  • differential gearing having an input connected to be positively driven from the power source and having an output connected for positively driving a roller of the other set, and having another input rotatable to impart a selectable speed differential to the speeds of said positively driven rollers;
  • drive means connected for rotating the remaining rollers from the power source, and including yielding connections whereby said remaining rollers will participate in feeding and tensioning the strip in a substantially slip-free manner.
  • Strip tensioning apparatus comprising:
  • positive drive means connected to the power source for rotating a roller in each set at determinable different speeds so as to feed the strip past said sets while imposing a prescribed elongation to the strip as determined by the difference in said speeds;
  • other drive means connected to the power source for rotating the remaining rollers of both sets;
  • slip coupling means interposed in said other drive means connected to each said remaining roller, including means for individually setting the maximum value of transmitted torque in each of said slip coupling means.
  • the apparatus defined in claim 4 including means for simultaneously varying said maximum transmitted 9 torque values in all of said slip coupling means while maintaining said values proportional to preset quantities. 6.
  • said positively driven rollers comprise an output roller of said first set and an input roller of said second set.
  • each of sensing means and with each of said slip coupling means 5 said positively driven rollers is slightly smaller in difor simultaneously varying said maximum transmitted torque value in all of said slip coupling means in proportion to the sensed strip tension, and means for maintaining the said values proportional to preset quantities.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Metal Rolling (AREA)
US466899A 1964-07-03 1965-06-25 Strip tensioning apparatus Expired - Lifetime US3362202A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR980609A FR1426137A (fr) 1964-07-03 1964-07-03 Perfectionnements aux dispositifs destinés à la mise sous tension en continu de bandes métalliques

Publications (1)

Publication Number Publication Date
US3362202A true US3362202A (en) 1968-01-09

Family

ID=8833845

Family Applications (1)

Application Number Title Priority Date Filing Date
US466899A Expired - Lifetime US3362202A (en) 1964-07-03 1965-06-25 Strip tensioning apparatus

Country Status (5)

Country Link
US (1) US3362202A (de)
BE (1) BE666342A (de)
DE (1) DE1527944C3 (de)
FR (1) FR1426137A (de)
GB (1) GB1113667A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783667A (en) * 1971-04-14 1974-01-08 Ungerer Irma Apparatus for straightening metal by stretching
US3796080A (en) * 1971-05-13 1974-03-12 Ungerer Irma Combined stretch-type straightening apparatus for metal strips
FR2567427A1 (fr) * 1984-07-10 1986-01-17 Mitsubishi Heavy Ind Ltd Procede de commande d'un equipement d'egalisation de tension destine a la correction d'une deformation sur un produit lamine en bande
US4651549A (en) * 1981-11-13 1987-03-24 Sumitomo Metal Industries, Ltd. Method for correcting rolled material
US4680952A (en) * 1984-02-17 1987-07-21 Max Kammerer Gmbh Process and apparatus for the production of strands for Bowden cables
WO2010020488A1 (de) * 2008-08-20 2010-02-25 Siemens Aktiengesellschaft Verfahren zur steuerung/oder regelung einer antriebslast eines eine rolle eines rollenverbunds antreibenden motors, steuer- und/oder regeleinrichtung, maschinenlesbarer programmcode, speichermedium und industrieanlage
EP2958688B1 (de) 2013-02-19 2018-04-04 F.I.M.I. - Fabbrica Impianti Machine Industriali - S.p.A. Rollenrichtanlage für bleche und verfahren zum nivellieren eines blech damit

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE791015A (fr) * 1972-07-21 1973-03-01 Bwg Bergwerk Walzwerk Dispositif de tension pour bandes a circulation continue
BE793477A (fr) * 1972-11-28 1973-04-16 Bwg Dispositif de tension pour bandes a circulation
DE3026129A1 (de) * 1980-07-10 1982-02-04 Erwin Kampf Gmbh & Co Maschinenfabrik, 5276 Wiehl Metallbandreckanlage
FR2486540A1 (fr) * 1980-07-11 1982-01-15 Pechiney Aluminium Procede d'obtention de pieces embouties a caracteristiques mecaniques ameliorees en aluminium et ses alliages
US8893537B2 (en) 2007-11-07 2014-11-25 The Bradbury Company, Inc. Methods and apparatus to drive material conditioning machines
CN115647053B (zh) * 2022-12-07 2023-03-21 河北纵横集团丰南钢铁有限公司 一种精轧机组

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1943005A (en) * 1928-05-26 1934-01-09 United Eng Foundry Co Strip mill
US2287380A (en) * 1940-10-15 1942-06-23 Clarence J Klein Metal rolling
US2526296A (en) * 1943-08-12 1950-10-17 United Eng Foundry Co Method and apparatus for processing strip metal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1943005A (en) * 1928-05-26 1934-01-09 United Eng Foundry Co Strip mill
US2287380A (en) * 1940-10-15 1942-06-23 Clarence J Klein Metal rolling
US2526296A (en) * 1943-08-12 1950-10-17 United Eng Foundry Co Method and apparatus for processing strip metal

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783667A (en) * 1971-04-14 1974-01-08 Ungerer Irma Apparatus for straightening metal by stretching
US3796080A (en) * 1971-05-13 1974-03-12 Ungerer Irma Combined stretch-type straightening apparatus for metal strips
US4651549A (en) * 1981-11-13 1987-03-24 Sumitomo Metal Industries, Ltd. Method for correcting rolled material
US4680952A (en) * 1984-02-17 1987-07-21 Max Kammerer Gmbh Process and apparatus for the production of strands for Bowden cables
FR2567427A1 (fr) * 1984-07-10 1986-01-17 Mitsubishi Heavy Ind Ltd Procede de commande d'un equipement d'egalisation de tension destine a la correction d'une deformation sur un produit lamine en bande
WO2010020488A1 (de) * 2008-08-20 2010-02-25 Siemens Aktiengesellschaft Verfahren zur steuerung/oder regelung einer antriebslast eines eine rolle eines rollenverbunds antreibenden motors, steuer- und/oder regeleinrichtung, maschinenlesbarer programmcode, speichermedium und industrieanlage
EP2958688B1 (de) 2013-02-19 2018-04-04 F.I.M.I. - Fabbrica Impianti Machine Industriali - S.p.A. Rollenrichtanlage für bleche und verfahren zum nivellieren eines blech damit

Also Published As

Publication number Publication date
GB1113667A (en) 1968-05-15
BE666342A (de) 1966-01-03
FR1426137A (fr) 1966-01-28
DE1527944A1 (de) 1971-11-11
DE1527944C3 (de) 1974-04-11
DE1527944B2 (de) 1973-09-06

Similar Documents

Publication Publication Date Title
US3362202A (en) Strip tensioning apparatus
US4365496A (en) Rolling process
US4893489A (en) Drive system for a bending machine
US4385511A (en) Method of rolling metal articles
GB1351074A (en) Rolling mills
US3427848A (en) Devices for cold-rolling and planishing metal sheet
US3962894A (en) Method of and apparatus for stretching a metal strip
US3764050A (en) Differential drive for tension rollers
US3626737A (en) Bridles
US3332292A (en) Method and apparatus for rolling strip
DE3574346D1 (en) Rolling mill drive
US3200624A (en) Apparatus and process for processing strip material
US3312091A (en) Control system for material reducing apparatus
US3641797A (en) Stretcher leveling system
US3212310A (en) Automatic gauge and tension control system
US3783667A (en) Apparatus for straightening metal by stretching
USRE28602E (en) Differential drive for tension rollers
US3777533A (en) Apparatus for straightening metal by stretching
US3162069A (en) Method and apparatus for metal rolling
US3389591A (en) Bridle
JPS6330091B2 (de)
US3415090A (en) Stand for helical rolling
EP0161223B1 (de) Vorrichtung zum Regeln der Bandspannung in einem Warmwalzwerk
JPS54107855A (en) Method and apparatus for controlling cold rolling mill
US3174317A (en) Gage-control system for strip mill