EP1454684B1 - Procédé pour le formage d' une pièce et machine de laminage - Google Patents

Procédé pour le formage d' une pièce et machine de laminage Download PDF

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Publication number
EP1454684B1
EP1454684B1 EP04001862.4A EP04001862A EP1454684B1 EP 1454684 B1 EP1454684 B1 EP 1454684B1 EP 04001862 A EP04001862 A EP 04001862A EP 1454684 B1 EP1454684 B1 EP 1454684B1
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EP
European Patent Office
Prior art keywords
workpiece
rollers
rotational speed
process phase
tools
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
EP04001862.4A
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German (de)
English (en)
Other versions
EP1454684A2 (fr
EP1454684A3 (fr
Inventor
Günter Dipl.Ing. Hofmann
Stellios Dipl.Ing. Katsibardis
Siegfried Dipl.Ing. Hausdörfer
Henry Dipl.Ing. Zwilling
Günter Dipl.Ing. Vogler
Herbert Dipl.Ing. Rüger
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.)
Langenstein and Schemann GmbH
Original Assignee
Langenstein and Schemann 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
Priority claimed from DE10319258A external-priority patent/DE10319258B4/de
Application filed by Langenstein and Schemann GmbH filed Critical Langenstein and Schemann GmbH
Priority to EP11162489.6A priority Critical patent/EP2340898B1/fr
Publication of EP1454684A2 publication Critical patent/EP1454684A2/fr
Publication of EP1454684A3 publication Critical patent/EP1454684A3/fr
Application granted granted Critical
Publication of EP1454684B1 publication Critical patent/EP1454684B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • 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
    • B21B37/58—Roll-force control; Roll-gap control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/18—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling
    • 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
    • B21B31/04—Rolling stand frames or housings; Roll mountings ; Roll chocks with tie rods in frameless stands, e.g. prestressed tie rods
    • 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
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • 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
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/14—Couplings, driving spindles, or spindle carriers specially adapted for, or specially arranged in, metal-rolling mills
    • B21B35/141—Rigid spindle couplings, e.g. coupling boxes placed on roll necks
    • 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
    • B21B37/46—Roll speed or drive motor control

Definitions

  • the invention relates to a method for forming a workpiece.
  • longitudinal rolling the workpiece is moved perpendicular to the axes of rotation of the rollers in a translatory movement and usually without rotation through the gap between the rollers (nip).
  • transverse rolling the workpiece does not translate with respect to the rollers or their axes of rotation, but rotates only about its own axis, which is usually a main axis of inertia, in particular the axis of symmetry in a rotationally symmetrical workpiece.
  • the rollers are usually at an angle to each other and to the workpiece, which is translationally and rotationally moved.
  • Profile cross rolling machines in which two rollers with wedge-shaped profile tools arranged on the outer circumference about mutually parallel axes of rotation Rotate in the same direction, sometimes called cross wedge rolling.
  • the tools have a wedge-shaped or triangular in cross-section geometry and can increase along the circumference in their radial dimension in one direction and / or extend obliquely to the axis of rotation of the rollers.
  • cross wedge or cross-profile rollers allow a variety of forming workpieces in high precision or dimensional accuracy.
  • the wedge-shaped tools can create circumferential grooves and other tapers in the rotating workpiece.
  • the outer diameter of the tool wedges when passing around the axis of rotation can be generated in combination with the oblique arrangement axially extending slopes and continuous transitions between two tapers of different diameters in the workpiece.
  • the wedge shape of the tools allows the production of fine structures through the wedge outer edges or outer surfaces.
  • Particularly suitable are cross wedge rollers for producing elongate, rotationally symmetrical workpieces with constrictions or elevations such as cams or ribs.
  • the forming pressure and the forming temperature depend on the material of which the workpiece is made, as well as the dimensional accuracy and surface quality requirements after forming.
  • the forming is usually carried out at elevated temperatures during rolling in order to achieve the formability or flowability of the material required for forming.
  • These temperatures, in particular occurring during forging can be in the range of room temperature in the case of so-called cold forming, or between 550 ° C. and 750 ° C. in the case of warm forging, and above 900 ° C. in the case of so-called hot forming.
  • the forming or forging temperature is usually also in a temperature range in which recovery and recrystallization processes take place in the material and unwanted phase transformations are avoided.
  • Cross wedge rolling machines are known, in which the workpieces at the beginning of the rolling process by means of a positioning device comprising two positioning supports (so-called guide rulers), in an initial position between the two rollers, which usually corresponds to the geometric center or the center of the nip , positioned. Now, the positioning carriers of the positioning device are withdrawn, so that the workpiece rotates freely between the rollers and is kneaded between the tools in the desired shape. After this rolling or kneading process and the corresponding completion of the workpiece, the workpiece is detected and ejected via a recess in the rotating rolling tool.
  • a positioning device comprising two positioning supports (so-called guide rulers)
  • Out DE 1 477 088 C is a cross wedge rolling machine for the transverse rolling of bodies of revolution or flat workpieces with two rotating in the same direction of rotation work rolls on the roll surfaces wedge tools are arranged interchangeable.
  • the wedge tools each have wedge-shaped or triangular extending from the roll shell to a height adjusted to the produced workpiece end, by knurling or otherwise roughened reduction strips and extending at the same distance from the roll shell, wedge-shaped smooth form surfaces with calibration effect.
  • the wedge tools are formed as deformation segments and extend only over a partial circumference of the associated roll surface. On the workpiece, the mutually facing surfaces and tools of the two work rolls move in opposite directions or in opposite directions to each other.
  • the EP 1 256 399 A1 discloses a cross rolling machine with two parallel operated modules of two rollers rotating in the same direction of rotation, the half-shell-shaped tools having radially projecting tool wedges on its peripheral surface, wherein the deformation of a workpiece requires only the rotation of half the circumference of a pair of rollers. All four rollers are powered by just one drive motor driven in each case via an interposed gear unit and drive shaft.
  • the DE 21 31 300 B discloses a cross rolling machine with two axially parallel horizontal superimposed profiled rollers for forming and cutting rotationally symmetrical workpieces, in which the profile rollers touch the workpieces diametrically opposite circumferential points and the lower profile roller has a recess for discharging the rolled and cut workpieces from the nip.
  • the US 2001/0039820 A1 discloses a rolling machine with a pair of rollers provided with rolling tools.
  • the phase between the rotation angles of the round tools is changed in response to a change in the workpiece diameter during the rolling process, for example, to generate a screw groove.
  • the rotational speed of both rollers is set constant, so the phase between the rotation angles is not changed, but remains the same. Furthermore, a regulation of the working torque is provided.
  • the invention is based on the object of specifying a new method for forming workpieces.
  • forming is understood to mean any transformation of the shape of a workpiece into another form, as also described at the outset, including preforming and finish forming.
  • the dependence of the rotational speed of the rollers on the rotational position of the roller (s) is or is chosen depending on the machined workpiece.
  • an optimum course of the rotational speed adapted to the workpiece is determined in advance and then adjusted during the forming of the workpiece.
  • the method generally comprises at least three process steps or process phases.
  • a first process phase the workpiece is positioned between the rollers.
  • the workpiece is formed between the rotating tools of the rolls.
  • a third process phase the workpiece is removed or ejected again from the space between the rollers.
  • the rotational angle or the angular position of the rollers changes continuously.
  • the rotational speed of the rollers in the first process phase is selected to be lower, at least on average, than during the second process phase.
  • the rotational speed of the rollers during the second process phase is chosen to be greater, at least on average, than during the third process phase.
  • the workpiece is automatically positioned between the rollers during the first process phase by means of a positioning device.
  • the workpiece is preferably detected by a recess in the tools of at least one roller and then rolled during the second process phase between the tools of the two rollers.
  • the rotational speed is now increased in an advantageous embodiment after detecting the workpiece through the recess in the tools of the roller (s).
  • the workpiece is detected by a recess in the tools of at least one roller and ejected from the space between the rollers.
  • the rotational speed of the rollers is now preferably reduced.
  • the rotational speeds when detecting the workpiece at the beginning of the second process phase and at the end of the second process phase are in particular approximately the same.
  • the rotational speed is at least partially kept constant during the second process phase.
  • the rotational speed of the roller (s) can also be changed in the second process phase, in particular if several tools on the roller process the workpiece successively in different sub-process phases of the second process phase.
  • the rotational speed can be reduced at the beginning of a sub-process phase.
  • the rotational speed can also be kept at least partially constant during the first process phase and the positioning of the workpiece.
  • the rotational speed and / or direction of rotation of the rollers are or are set at least in angular or time sections, preferably predominantly, substantially equal to one another, but can also be set at least in sections different from one another.
  • the position detection device preferably comprises at least one angular position incremental encoder or an absolute value encoder and / or an optical, magnetic, inductive or ultrasonic angle position sensor.
  • roller drives In addition to drives with PM motors, hydraulic drives and / or electric drives with other motors, in particular with synchronous or asynchronous motors and / or induction motors, come into consideration as roller drives.
  • the in the 1 to 3 illustrated as a cross wedge roll or cross wedge rolling machine 1 comprises a first work roll 2 which is rotatable about a rotation axis A or a rotating and a second work roll 3, which is rotatable about a rotation axis B or rotating.
  • the sense of rotation of both work rolls 2 and 3 is illustrated and the same with the arrows shown.
  • the axes of rotation A and B are arranged substantially parallel to each other, in the example of 1 to 3 seen in the direction of gravity on top of each other, so that the work rolls 2 and 3 are arranged one above the other.
  • the work rolls have a substantially cylindrical outer surface. The distance between the cylindrical outer surfaces of the two work rolls 2 and 3 is designated by W.
  • wedge-shaped tools 20 and 21 or 30 and 31 are respectively fixed in cross-section, in particular braced.
  • the tools 20 and 21 of the first work roll 2 and the tools 30 and 31 of the second work roll 3 are each arranged obliquely and at an angle to the respective axis of rotation A and B, wherein the tools 20 and 21 of the work roll 2 with respect to the running between the two rolls parallel to the axes of rotation extending, the geometric center defining central axis M axially in are arranged in substantially the same positions.
  • the tools 20 and 21 and 30 and 31 take in the circumferential direction seen in its cross section, wherein the increase of the cross section in the tools 20 and 21 in the same direction of rotation or orientation and in the tools 30 and 31 of the second work roll 3 opposite or opposite directions to which the tools 20 and 21 of the first work roll 2 is.
  • Each work roll 2 and 3 is releasably held in a two-part holding device and can be removed from the holding device in its unlocked state to replace the tools 20 and 21 or 30 and 31 or the entire work rolls 2 and 3 with the tools 20 and 21 and 30 and 31.
  • the holding device for the work roll 2 is denoted by 12 and the holding device for the work roll 3 with 13.
  • a in 1 and 2 The left-hand arranged first part 12A of the holding device 12 comprises a conical receptacle 14 for receiving a axially to the rotation axis A outwardly from the work roll 2 extending frusto-conical extension 24 (stub shaft).
  • the second part 12B accordingly comprises a receptacle 15 for receiving a corresponding conically tapered away from the work roll 2 and axially to the axis of rotation A extending extension 25 of the work roll 2.
  • the work roll 2 is fixed in the receptacles 14 and 15 of the holding device 12 clamped, wherein the axial force is generated on the receptacle 15 in the direction of the axis of rotation A to the work roll 2 towards the support of the work roll 2 by a spring 16 or other an axial force-exerting element.
  • the receptacles 14 and 15 are rotationally symmetrical to the axis of rotation A and stored in unspecified pivot bearings.
  • the receptacle 14 continues as a hollow shaft axially to the axis of rotation A and has in its facing away from the work roll 2 end portion of a gear 18, which as well as a corresponding gear 19, the second work roll 3 is associated with a control gear (pinion, drive gear) 5 is engaged.
  • the control gear 5 is now coupled via an output shaft 45 with a drive motor 4.
  • the control gear 5, the output shaft 45 and the - not shown - rotor of the drive motor 4 are rotatable about a common axis of rotation R or rotating.
  • the built-up of the drive motor 4, the output shaft 45 and the control gear 5 drive for the gears (roller gears) 18 and 19 and thus the synchronously with the gears 18 and 19 rotating work rolls 2 and 3 is thus a direct drive.
  • the mechanical power supplied by the drive motor 4 corresponds to the product of torque and angular velocity or angular frequency ⁇ , the angular frequency ⁇ being equal to the product of 2 ⁇ and the rotational speed n.
  • the drive motor 4 is preferably a torque motor and has a high torque even at a comparatively low speed n of the drive motor 4 for generating the required drive power for the drive rollers 2 and 3.
  • the transmission ratio of the control gear 5 to the gears 18 and 19 can thus be selected in the range of 1, in particular between about 1: 1 and about 1: 2.
  • the drive rollers 2 and 3 rotate twice as fast as that Control gear 5 and the drive motor 4, at a transmission ratio of 1: 1 just as fast.
  • Typical speeds of work rolls 2 and 3 are between about 10 revolutions per minute (RPM) and about 40 RPM, typically at 15 RPM.
  • a preferred embodiment of the drive motor 4 is a permanent magnet motor, in which, usually on the rotor, permanent magnets (permanent magnets) are arranged, which generate a magnetic flux generated in the induction field generated by electromagnets or windings of the stator, wherein by interaction of the magnetic flux of the permanent magnets and the induction field, the rotation of the rotor on the basis of the induction principle or electromotive principle arises.
  • a torque motor is a synchronous motor, that is, the rotor rotates synchronously with the rotating magnetic flux.
  • the induction windings of the stator are usually connected to the phases of a three-phase connection and arranged offset by 120 ° to each other.
  • permanent magnets are used with the highest possible energy product, such as rare earth cobalt magnets.
  • the stator usually has an iron core with the three-phase winding package, while the rotor has a cylindrical iron core with the permanent magnets.
  • Such a torque motor can have a torque of up to 80,000 Nm.
  • the high torque also causes a very fast spin.
  • the permanent magnet motor or torque motor can accelerate the rollers within a rotation angle of only 1 °, preferably even only 0.5 °, to the rated speed, for example 30 rpm. This high dynamics or rotational acceleration of the torque motor allows a very dynamic control of the speed.
  • the control or regulation of the speed n of each other and synchronously rotating work rolls 2 and 3 is now adapted according to the invention with a special control method or control method to the rolling process.
  • the rotational speed n or angular velocity ⁇ of the work rolls 2 and 3 is adapted to the respective rotational position or angular position ⁇ of the work rolls 2 and 3 and controlled in dependence on this rotational position ⁇ .
  • a positioning device for the workpiece 10 is designated 60 and comprises two relatively movable positioning parts (guide rulers) 61 and 62nd
  • FIG. 4 shows a position of the work rolls 2 and 3 before the introduction of the workpiece.
  • the same direction of rotation of the two rollers 2 and 3 about the respective axes of rotation A and B are marked with corresponding arrows.
  • the tool 20 which extends in segments around the outer surface of the work roll 2 and about the axis of rotation A, a recess 23 is provided.
  • a further recess 33 is also provided in the segment-like tool 30.
  • the workpiece 10 is now taught by means of two guide ruler of a positioning device not shown in a position between the work rolls 2 and 3, in which it is detected by the recess 23 in the tool 20 of the first work roll 2.
  • This process phase with incorporated workpiece 10 in the starting position shows FIG. 5 .
  • the mutually facing surfaces of the work rolls 2 and 3 move in opposite directions or opposite to each other.
  • FIG. 7 Finally, the position of the work rolls 2 and 3 is illustrated, in which the workpiece 10 falls into the recess 33 of the tool 30 of the second work roll 3 and; upon further rotation of the work roll 3, is ejected from the space between work rolls 2 and 3.
  • Hz Hertz
  • ⁇ 9 nine consecutive angular positions ⁇ 1 to ⁇ 9 drawn on the ⁇ -axis and between the angular positions ⁇ 1 and ⁇ 9 the rotational speed n as a function of n ( ⁇ ) of the rotational angle ⁇ plotted.
  • K The resulting curve is labeled K.
  • This curve K is in turn subdivided into seven sub-curves K1 to K7, the first sub-curve K1 between the angular positions ⁇ 1 and ⁇ 2, the second sub-curve K2 between the angular positions ⁇ 2 and ⁇ 3, the third sub-curve K3 between the angular positions ⁇ 3 and ⁇ 4, the fourth sub-curve K4 between the angular positions ⁇ 4 and ⁇ 5, the fifth sub-curve K5 between the angular positions ⁇ 5 and ⁇ 6, the sixth sub-curve K6 between the angular positions ⁇ 6 and ⁇ 7 and the seventh sub-curve K7 between the angular positions ⁇ 7 and ⁇ 8.
  • the first part curve K1 and the second part curve K2 show a possible time profile of the rotational speed n of the work rolls 2 and 3 in the first process phase between the angular positions .phi.1 and .phi.3 for preparing and positioning the workpiece 10.
  • a steep increase according to the sub-curve K1 increases the speed from 0 to a first speed n1> 0 and then held substantially constant between the angular positions ⁇ 2 and ⁇ 3, corresponding to the part curve K2.
  • the workpiece 10 is positioned between the work rolls 2 and 3 and finally detected at approximately the angular position ⁇ 3 of the recess 23 of the tool 20 of the first work roll 2.
  • the angular position ⁇ 3 is now the angular position of the first rotary roller 2, in which the workpiece 10 is fixed in the recess 23 and the rolling process can begin.
  • the angular position or rotational position of the second work roll 3 is directly correlated with the angular position of the work roll 2 and changes synchronously, but in opposite directions with the angular position of the first work roll, wherein the rotation of the work rolls 2 and 3 takes place in the same direction. Therefore, it is sufficient to consider the rotational position of the first work roll 2.
  • the angular position of the second work roll 3 are taken as a variable or parameter, of which the speed n is made dependent. In any case, it is sufficient to provide on one of the two work rolls 2 or 3 a position detection device for determining the angle of rotation ⁇ relative to a reference or zero position ⁇ 0, which in the 4 to 7 is selected down and drawn.
  • the rotational speed n is reduced again during the part curve K5 to an angle ⁇ 6 of the first work roll 2 in front of the associated angular position ⁇ 7 of the first work roll 2, preferably again with one high braking acceleration and then with one lower braking acceleration, according to a flatter slope in the part curve K6 between the angular positions ⁇ 7 and ⁇ 8 further lowered. It is therefore carried out the ejection of the workpiece at a lower speed n and a lower spin to gently eject the workpiece.
  • FIG. 9 shows a dependence n ( ⁇ ), during which a more complicated profile is driven during the forming process.
  • a first forming phase with a first tool is now accelerated between the angular positions ⁇ 4 and ⁇ 5 of a speed n2 to a higher speed n8 and maintain this speed n8 up to an angular position ⁇ 6. Then is braked again from the speed n8 to a speed n5 between the angular positions ⁇ 6 and ⁇ 7.
  • the rotational speed n5 is maintained between the angular positions ⁇ 7 and ⁇ 8 and then accelerated again between ⁇ 8 and ⁇ 9 to a rotational speed n7, which is maintained again during a plateau phase between ⁇ 9 and ⁇ 10.
  • This plateau phase between ⁇ 9 and ⁇ 10 with the speed n7 corresponds to another forming phase with another tool.
  • the angle-dependent speed control according to the invention allows a variety of adapted rolling rotational movements for different processes, tools and workpieces.
  • FIG. 1 and 3 further show a worm wheel 9, which is coupled to the gear 18 for the work roll 2 and allows adjustment or adjustment of the relative angular position of the work roll 2 relative to the work roll 3.
  • a worm wheel 9 which is coupled to the gear 18 for the work roll 2 and allows adjustment or adjustment of the relative angular position of the work roll 2 relative to the work roll 3.
  • an adjusting drive not shown, the rotational drive with the permanent magnet motor 4 and the transmission to the output shaft 45 and the control gear 5 relative to can move the two roller gears 18 and 19.
  • an asymmetric engagement or backlash can be corrected.
  • the holding devices 12 and 13 of the two work rolls 2 and 3 are supported by a support means 6 and stored or anchored in this.
  • the support means 6 comprises four columnar support members 6A to 6D arranged in a rectangular arrangement and mounted or fixed on a common floor panel 6E supported on the floor 50.
  • an associated tie rod 7A to 7B is vertically arranged in the longitudinal direction of the respective support member which is fixed to the bottom of the support plate 6E and above by means of an associated lock nut, preferably a hydraulically operated lock nut (9B, 9C in FIG. 3 ) is biased.
  • a slotted Unterlagringsegment is placed under the hydraulic nut when the hydraulic nut is in the released state and then pressed by applying the hydraulic pressure, the nut on the Unterlagsringsegment.
  • the support means forming the frame of the rolling machine can be set under a certain tension. This leads to a stiffening of the roll stand.
  • FIG. 10 and 11 show a further cross wedge rolling machine 1, in which, unlike the rolling machine according to 1 to 3 a first drive 42 for the first work roll 2 and a second, independent of the first drive 42 drive 43 for the second work roll 3.
  • Each drive 42 and 43 includes an associated permanent magnet motor 44 and 45 and a - not shown - gear, for example a, in particular three-stage, gear transmission, for transmitting the torque of the motor to the associated work roll 2 or 3.
  • the reduction ratio of each transmission for example, be 1:35.
  • 10 and 11 are the rotation axis C of the output shaft of the permanent magnet motor 44 of the first drive 42 and the rotation axis D of the output shaft of the permanent magnet motor 45 of the second drive 43 orthogonal to the axes of rotation A and B of the respective work rolls 2 and 3 directed and the motors accordingly laterally Roll stand arranged.
  • Each of the permanent magnet motors 44 and 45 is controlled electronically, in particular via a converter. As a result, the work rolls 2 and 3 can be driven either electronically synchronously or asynchronously.

Claims (11)

  1. Procédé pour le formage d'une pièce (10), dans lequel
    a) ladite pièce (10) est positionnée entre au moins deux cylindres (2, 3) rotatifs, équipés d'outils (20, 21 ; 30, 31),
    b) les vitesses de rotation des cylindres (2, 3) sont sensiblement égales l'une à l'autre,
    c) la position de rotation d'un cylindre (2, 3) est déterminée au moyen d'au moins un dispositif de détection de position,
    d) la vitesse de rotation des cylindres (2, 3) est commandée ou réglée en fonction de la position de rotation (ϕ) d'au moins un des cylindres (2, 3), déterminée par ledit au moins un dispositif de détection de position, selon une dépendance, déterminée au préalable, entre la vitesse de rotation et la position de rotation (ϕ),
    e) la dépendance entre la vitesse de rotation et la position de rotation (ϕ) du/des cylindre(s) (2, 3) étant choisie en fonction de la pièce (10) traitée.
  2. Procédé selon la revendication 1, dans lequel
    a) pendant une première phase du processus, la pièce (10) est positionnée entre les cylindres, de préférence au moyen d'un dispositif de positionnement,
    b) pendant une deuxième phase du processus, ladite pièce est formée entre les outils (20, 21 ; 30, 31) des cylindres, et
    c) pendant une troisième phase du processus, ladite pièce est retirée ou éjectée hors de l'espace intermédiaire entre les cylindres (2, 3).
  3. Procédé selon la revendication 2, dans lequel la vitesse de rotation dans la première phase du processus est inférieure, au moins en moyenne, à celle pendant la deuxième phase du processus, et/ou dans lequel la vitesse de rotation des cylindres (2, 3) pendant la deuxième phase du processus est supérieure, au moins en moyenne, à celle pendant la troisième phase du processus.
  4. Procédé selon la revendication 2 ou la revendication 3, dans lequel la pièce (10), au début de la deuxième phase du processus, est saisie par le ou les outils (20, 21 ; 30, 31) d'au moins un cylindre et, pendant la deuxième phase du processus, est formée entre les outils (20, 21 ; 30, 31) des deux cylindres (2, 3), puis, au début de la troisième phase du processus, est éjectée hors de l'espace intermédiaire entre les cylindres.
  5. Procédé selon la revendication 4, dans lequel la vitesse de rotation est accrue dans la deuxième phase du processus après que la pièce a été saisie par les outils (20, 21 ; 30, 31) des cylindres (2, 3), et/ou dans lequel la vitesse de rotation est diminuée dans la troisième phase du processus avant l'éjection de la pièce (10), et/ou dans lequel la vitesse de rotation est sensiblement identique au début de la deuxième phase du processus lorsque la pièce est saisie et à la fin de la deuxième phase du processus.
  6. Procédé selon une ou plusieurs des revendications 2 à 5, dans lequel la vitesse de rotation des cylindres (2, 3) pendant la deuxième phase du processus est maintenue constante au moins en partie, ou dans lequel la vitesse de rotation des cylindres est modifiée pendant la deuxième phase du processus, en particulier selon une courbe prédéfinie ou une dépendance prédéfinie.
  7. Procédé selon l'une quelconque des revendications 2 à 6, dans lequel la deuxième phase du processus comporte différentes sous-phases, pendant lesquelles de préférence la pièce (10) est formée sur les cylindres par différents outils (20, 21 ; 30, 31), la vitesse de rotation étant modifiée avant ou après une sous-phase et/ou entre les sous-phases et/ou pendant les sous-phases, et/ou la vitesse de rotation étant diminuée avant au moins une ou avant chaque sous-phase.
  8. Procédé selon une ou plusieurs des revendications précédentes, dans lequel les sens de rotation des cylindres (2, 3) sont réglées, au moins par phases, de manière sensiblement identique l'un à l'autre et/ou sont réglées, au moins par phase, différemment l'un par rapport à l'autre.
  9. Procédé selon une ou plusieurs des revendications précédentes, dans lequel la vitesse de rotation est diminuée dans au moins une position de rotation (ϕ), afin d'empêcher une sollicitation excessive de la pièce (10) dans cette position de rotation, et/ou dans lequel la vitesse de rotation est commandée ou réglée dans au moins une position de rotation, de telle sorte que le couple de rotation, exercé sur le cylindre correspondant dans cette position de rotation, accepte ou ne dépasse pas une valeur prédéfinie.
  10. Procédé selon une ou plusieurs des revendications précédentes, dans lequel la position actuelle des outils (20, 21 ; 30, 31) sur les cylindres (2, 3) est déterminée et une position de rotation de référence des cylindres est réglée en fonction de position actuelle déterminée des outils.
  11. Procédé selon une ou plusieurs des revendications précédentes, dans lequel la pièce (10) est formée à froid ou est formée à chaud est formée ou à très haute température, et/ou dans lequel la pièce est constituée par un matériau contenant du fer ou par un matériau métallique sans fer.
EP04001862.4A 2003-03-04 2004-01-29 Procédé pour le formage d' une pièce et machine de laminage Expired - Lifetime EP1454684B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11162489.6A EP2340898B1 (fr) 2003-03-04 2004-01-29 Machine de laminage

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10309536 2003-03-04
DE10309536 2003-03-04
DE10319258 2003-04-28
DE10319258A DE10319258B4 (de) 2003-03-04 2003-04-28 Verfahren zum Umformen eines Werkstückes und Walzmaschine zum Durchführen des Verfahrens

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP11162489.6A Division-Into EP2340898B1 (fr) 2003-03-04 2004-01-29 Machine de laminage
EP11162489.6A Division EP2340898B1 (fr) 2003-03-04 2004-01-29 Machine de laminage

Publications (3)

Publication Number Publication Date
EP1454684A2 EP1454684A2 (fr) 2004-09-08
EP1454684A3 EP1454684A3 (fr) 2005-08-03
EP1454684B1 true EP1454684B1 (fr) 2014-05-07

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EP04001862.4A Expired - Lifetime EP1454684B1 (fr) 2003-03-04 2004-01-29 Procédé pour le formage d' une pièce et machine de laminage

Country Status (5)

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US (2) US7225656B2 (fr)
EP (1) EP1454684B1 (fr)
JP (1) JP3889006B2 (fr)
CN (1) CN1281347C (fr)
DE (1) DE20312485U1 (fr)

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CN102371270A (zh) * 2011-08-31 2012-03-14 杭州星冠机械科技有限公司 一种两辊线材轧制成型箱
CN103752607B (zh) * 2014-01-29 2015-07-15 雷亚夫 采用磁悬浮超导轧机轧制金属板材的轧制工艺
CN104646429B (zh) * 2015-01-23 2016-09-28 合肥市百胜科技发展股份有限公司 换辊装置
CN104668289B (zh) * 2015-01-23 2017-02-22 合肥市百胜科技发展股份有限公司 轧机机架
CN104668290B (zh) * 2015-01-23 2017-01-04 合肥市百胜科技发展股份有限公司 轧机
ITUB20154811A1 (it) * 2015-10-16 2017-04-16 Danieli Off Mecc Gabbia di laminazione per prodotti metallici
JP6967529B2 (ja) * 2016-11-22 2021-11-17 株式会社三共製作所 板材送り装置
PL240329B1 (pl) * 2017-11-02 2022-03-14 Lubelska Polt Narzędzie klinowe do walcowania odkuwek
PL240328B1 (pl) * 2017-11-02 2022-03-14 Lubelska Polt Narzędzie klinowe do dwuetapowego walcowania odkuwek
CN114082781B (zh) * 2021-11-26 2023-11-21 宁夏建龙特钢有限公司 一种螺纹钢精轧加工机械及精轧加工工艺

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Also Published As

Publication number Publication date
US7406853B2 (en) 2008-08-05
EP1454684A2 (fr) 2004-09-08
US20070044533A1 (en) 2007-03-01
US7225656B2 (en) 2007-06-05
JP2004268145A (ja) 2004-09-30
CN1281347C (zh) 2006-10-25
JP3889006B2 (ja) 2007-03-07
EP1454684A3 (fr) 2005-08-03
DE20312485U1 (de) 2003-10-16
CN1530183A (zh) 2004-09-22
US20040231380A1 (en) 2004-11-25

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