EP4028183B1 - Dispositif et procédé de laminage par étirage - Google Patents

Dispositif et procédé de laminage par étirage Download PDF

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Publication number
EP4028183B1
EP4028183B1 EP20772242.2A EP20772242A EP4028183B1 EP 4028183 B1 EP4028183 B1 EP 4028183B1 EP 20772242 A EP20772242 A EP 20772242A EP 4028183 B1 EP4028183 B1 EP 4028183B1
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EP
European Patent Office
Prior art keywords
workpieces
stretch
rolling
manipulator
gripper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20772242.2A
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German (de)
English (en)
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EP4028183A1 (fr
Inventor
Markus Schaprian
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.)
SMS Group GmbH
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SMS Group GmbH
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Publication of EP4028183A1 publication Critical patent/EP4028183A1/fr
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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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
    • 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
    • B21H1/20—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling rolled longitudinally
    • 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
    • B21H1/22—Making articles shaped as bodies of revolution characterised by use of rolls having circumferentially varying profile ; Die-rolling
    • 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
    • B21H9/00—Feeding arrangements for rolling machines or apparatus manufacturing articles dealt with in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
    • B21K27/02—Feeding devices for rods, wire, or strips
    • B21K27/04—Feeding devices for rods, wire, or strips allowing successive working steps

Definitions

  • the invention relates to a stretch-rolling device and a stretch-rolling method for pressure-forming workpieces by rolling.
  • the stretch-rolling device has a pair of work rolls with two rolls, which implement a plurality of stages in the axial direction, which are set up for the gradual deformation of the workpieces, in that the workpieces pass through the stages successively.
  • the stretch rolling process is one of the longitudinal rolling processes in which the rolling stock is transported through the roll gap perpendicularly to the rolling axes and is thereby deformed.
  • This is characterized by the fact that a blank to be rolled, for example a round or square material, is fed to the rolls by a manipulator and in individual stages, which are arranged in the axial direction of the rolls and are also referred to as "passes", “calibres” or “sectors " are designated, is transformed.
  • the steps of the rollers therefore usually have different rolling profiles and the blank to be rolled passes through one after the other, as a result of which the profile cross-section of the blank is changed step by step.
  • Stretch rolling is particularly suitable for the production of intermediate forms, such as semi-finished products or preforms, and in rarer cases also of finished parts.
  • downstream processing steps such as drop forging can be simplified by stretch rolling.
  • stretch rolling is used, for example, to produce intermediate forms for components such as crankshafts, axles and link components.
  • the DE 10 2014 101 150 A1 describes a stretch rolling device which has a pair of rolls with two reversible rolls and two gripping devices for handling the workpieces to be rolled.
  • the two gripping devices are arranged on opposite sides of the pair of rollers.
  • the rollers have at least two rolling tools, ie steps, in the axial direction, the steps being set up for the gradual deformation of the workpiece.
  • the output of the workpieces is in accordance with the DE 10 2014 101 150 A1
  • the technique described is limited in that the handling of the workpieces by the two gripping devices only takes up part of the pair of rollers, ie not all stages are used at the same time.
  • a stretching device according to DE 10 2016 112 946 A1 , which forms the basis for the preamble of claim 1, achieved.
  • a plurality of gripping devices are installed on the opposite sides of the pair of rollers, with two opposite gripping devices forming a pair of gripping devices being assigned to one step and gripping the corresponding workpiece.
  • the stretch-rolling device has a transfer device in order to convey the workpieces in the working cycle of the device from one pair of gripping devices to one pair of gripping devices.
  • the output increase according to the DE 10 2016 112 946 A1 is paid for by a considerable design effort, because two gripping devices are used per step to grip the workpiece at both ends for the parallel assignment of the steps.
  • the parallel rolling of several workpieces is also involves a technical problem resulting from the fact that the workpieces have different lengths due to the deformation at different stages along the axial direction of the rolls. For this purpose, length compensation between the individual gripping devices must be ensured in order to ensure a reliable and high-quality rolling process.
  • More stretching devices are in the DE 1 269 087 A , WO 2018/171828 A1 , DE 10 2014 101 151 A1 and EP 2 316 589 A1 described.
  • One object of the invention is to specify an improved stretch-rolling device and an improved stretch-rolling method, in particular to realize a high output of workpieces with reduced structural complexity.
  • the stretch-rolling device according to the invention is used for pressure forming of workpieces, preferably metallic workpieces, by rolling.
  • the stretch-rolling device has a pair of work rolls with two rolls which can each be rotated about their roll axes and form a roll gap between them.
  • the rollers are set up in such a way that they realize several stages in the axial direction, which are intended to deform the workpieces step by step, the workpieces passing through the stages successively.
  • the work rolls can be reversible in rotation. However, this is not absolutely necessary.
  • the rolled profiles differ at the different stages in order to carry out a gradual deformation of the workpieces.
  • each workpiece goes through all stages, from the lowest stage to the highest stage.
  • stages are omitted or skipped.
  • the designations “successively”, “stepwise” etc. thus do not necessarily limit the processing to a complete run through of all available stages.
  • the stretch-rolling device also has one, preferably precisely one, manipulator with a plurality of gripping devices.
  • the number of gripping devices is equal to the number of steps.
  • the gripping devices preferably all or substantially all of the manipulator, are arranged on a working side of the pair of work rolls and are adapted to grip the workpieces and guide them through the nip at an associated stage in an advance/retract direction.
  • the working side is defined by the position of the pair of working rolls and the gripping devices.
  • the side opposite the working side (relative to the pair of working rolls) can be designed as a tool changing side, via which maintenance work, such as a roll change, can be carried out.
  • the stretch rolling apparatus further comprises a shelf arranged to temporarily support workpieces and transfer them in cooperation with the manipulator to another gripping device, preferably the adjacent gripping device of the next higher stage.
  • the workpieces are transferred from one gripping device to another gripping device, preferably a gripping device of a higher level, for example the next higher level.
  • This transfer of the workpieces normally takes place once per work cycle of the stretching device.
  • the workpiece that has completely gone through the processing preferably the workpiece of the highest level, is ejected. Furthermore, a new workpiece, which is also referred to herein as a blank, is fed to the lowest processing stage.
  • the term "finished work” refers only to the stretch rolling process, ie does not necessarily indicate a finished product or finished part. Rather, the finished workpiece, having passed through all the intended stages of the stretch rolling apparatus, is preferably an intermediate form, such as a stock or preform.
  • the tray is not a manipulator because the tray does not have gripping devices configured to grip the workpieces and feed them through the nip in an advance/retract direction.
  • the tray does not have any gripping devices that enter or pass or can pass through the nip.
  • the deposit can be set up passively in that the workpieces are placed on it for transfer or the deposit supports the workpieces without actively gripping or clamping them.
  • the tray can have retaining means that are set up to temporarily retain or stabilize the workpieces, for example to grip or clamp them.
  • the stretch-rolling device constructed in this way allows several workpieces to be processed at the same time by a parallel occupation of all or at least several stages, for example every second stage.
  • the output of the workpieces, and thus the productivity, can be increased thanks to the parallel allocation.
  • This is achieved without installing two or more manipulators on opposite sides of the pair of work rolls.
  • the manipulator on the working side may only be expanded to include additional gripping devices, such as tongs, as a result of which the improved functionality is achieved without a significant increase in the structural and procedural complexity of the stretching rolling device.
  • the transfer of the workpieces to gripping devices in the course of the process in subsequent stages is realized in connection with a deposit. In this way, a high output is achieved with a comparatively small number of assemblies, which also improves the reliability and maintainability of the stretching rolling device.
  • One or more gripping devices are preferably set up to be rotatable about their own axis in order to enable the corresponding workpieces to be rotated between the individual stages. This means a rotation of the workpieces about their longitudinal axis by a certain angle, for example 90°. The rotation can take place before or after the forming at the respective stage.
  • the gripping means are arranged to grip the workpieces at one end and feed them through the nip at an associated stage, while the workpieces are not gripped at the other end. It is not necessary for the "second" end of the workpiece to be gripped by an additional gripping device of a manipulator, which not only reduces the structural complexity but also the process control.
  • the tray can preferably be moved in the axial direction and/or in the advance/retraction direction.
  • the movability of the storage area can be used to implement or at least support the transfer of the workpieces by transporting them transversely through the storage area.
  • the tray can be set up to be movable in the up/down direction, for example in order to descend during rolling and not to impede the rolling process.
  • the shelf is preferably arranged on the working side.
  • the side opposite the working side which is advantageously designed as a tool changing side, is not obstructed by the shelf or has limited access. This improves the maintainability of the roll-forging device.
  • the number of gripping devices is equal to the number of stages, the assignment of gripping device to stage being a one-to-one assignment.
  • the pair of work rolls can be optimally used along the axial direction, with the nature and control of the individual gripping devices being able to be designed in the best possible way for the associated stage.
  • the gripping devices can preferably be moved by the manipulator in the axial direction and/or feed/retraction direction, with the manipulator itself being particularly preferably moveable relative to the pair of work rolls in the axial direction and/or feed/retraction direction for this purpose.
  • the movability of the gripping devices or the manipulator can be used to carry out the transverse transport, i.e. transport of the workpieces for transfer in the axial direction, either in connection with a stationary deposit or in combination with a deposit that can also be moved.
  • the workpieces of the different stages usually have different lengths.
  • at least one gripping device can preferably be adjusted relative to the manipulator in the advance/retraction direction. This can be realized by means of a length compensation section, which can adjust the gripping means, such as the clamps, of the corresponding gripping device for length compensation in the advance/retraction direction.
  • a length compensation section which can adjust the gripping means, such as the clamps, of the corresponding gripping device for length compensation in the advance/retraction direction.
  • at least N-1 (N denotes the number of stages) gripping devices have such a length compensation section.
  • the increase in length and/or the rate of increase in length may vary from stage to stage.
  • the gripping devices are preferably individually movable.
  • the individual mobility or movability in the advance/retraction direction can be implemented passively, for example spring-loaded, or actively, for example pneumatically, by an electric motor, etc.
  • the deposit has holding means that are set up to temporarily hold the workpieces for transfer to the respectively adjacent gripping device of the next higher level, preferably to clamp them while the gripping devices grip.
  • the retaining means are preferably essentially stationary, i.e. for example apart from a clamping movement, relative to the tray.
  • the object is also achieved by a stretching method for pressure forming of workpieces by means of a stretching device according to the above description solved.
  • the method includes: gripping a plurality of workpieces by a respective gripping device of the manipulator; passing the workpieces through the nip formed by the pair of work rolls at an associated stage in the advancing/retreating direction; rotating the rollers, preferably in opposite directions, and applying pressure to the workpieces through the rollers, thereby deforming the workpieces according to their stage; Transporting the workpieces to a transfer position and supporting the workpieces by the tray, preferably depositing the workpieces onto the tray; releasing the workpieces from the gripping devices; and gripping of workpieces by another gripping device, preferably the adjacent gripping device of the next higher level.
  • the gripping devices of the manipulator grip the workpieces at one end and feed them through the nip at the appropriate step, while the workpieces are not gripped at the other end.
  • One or more workpieces are thus preferably rotated between the individual steps about their longitudinal axes, for example by 90°.
  • the rotation can take place before or after the forming at the respective stage.
  • the deposit In order to transfer the workpieces to another gripping device, the deposit preferably moves in the axial direction and/or in the advance/retraction direction and/or up/down in order to implement or at least support the transfer.
  • the gripping devices move through the manipulator in order to transfer the workpieces to another gripping device in the axial direction and/or in the advance/retraction direction.
  • At least one gripping device is preferably used according to the length of the associated workpiece relative to the manipulator in the feed/retraction direction.
  • the gripping devices are preferably moved individually during rolling, since the increase in length and/or the rate of increase in length can differ from stage to stage. This can be done passively, for example with a spring, or actively, for example pneumatically, with an electric motor, etc.
  • the number of workpieces to be rolled is preferably smaller than the number of stages available, for example approximately half as large.
  • a reduced occupancy of the stages may be favorable or necessary to comply with machine limits with regard to force or energy consumption.
  • the Figures 1a to 1c are schematic plan views of a stretching device 1 in different process stages according to an embodiment.
  • the stretch rolling device 1 is set up for press-forming workpieces W by rolling.
  • the stretch rolling device 1 has a pair of work rolls with an upper and a lower roll 10 .
  • the top roller is omitted from the figures to make the manipulation and transport of the workpieces W easier to see.
  • the rollers 10 are oppositely rotatable. Their direction of rotation can be reversible, but this is not absolutely necessary.
  • the rollers 10 comprise a plurality of stages S1 to S4, which are also referred to as passes, calibers or segments.
  • the rolling profile of the work rolls differs at the different stages S1 to S4.
  • the steps S1 to S4 are used for the gradual reshaping of the workpieces W, such a workpiece W successively passing through the steps S1 to S4 for this purpose.
  • Four stages S1 to S4 are shown as examples in the figures.
  • the workpieces W are preferably rotated through an angle, for example 90°, as indicated by arrows in FIG Figure 1b is indicated.
  • the rotation can take place before or after the forming at the respective step S1 to S4.
  • the stretch-rolling device 1 also has a manipulator 20 with a plurality of gripping devices 21 .
  • the gripping devices 21 are assigned according to the stages S1 to S4, not necessarily a one-to-one assignment is required.
  • a gripping device 21 can be set up to operate several stages.
  • the number of grippers 21 is preferably equal to the number of stages S1 to S4 as shown in the figures, in which case the association is one-to-one.
  • the side on which the manipulator 20 with the gripping devices 21 is located relative to the pair of work rolls is referred to herein as the work side AS.
  • the gripping devices 21 have adjustable clamping jaws, for example, in order to be able to grip the workpieces W securely and release them for transfer.
  • the manipulator 20 is according to the embodiment of Figures 1a to 1c in the axial direction of the rollers 10 (referred to as “axial direction” or “transverse direction”) and in the horizontal radial direction thereof (referred to as “radial direction” or “feed/retreat direction”) thereof, as indicated by arrows in the figures .
  • axial direction or “transverse direction”
  • radial direction or “feed/retreat direction”
  • one or more of the degrees of freedom can also be realized individually by the gripping devices 21 .
  • Individual mobility of the gripping devices 21 or part of the gripping devices 21 (preferably at least three out of four) in the advance/retraction direction, also represented by arrows in the figures, is particularly preferably provided in order to provide a length compensation function for compensating for a change in the length of the workpiece W caused by the to realize different levels S1 to S4.
  • the individual movability in the advance/retraction direction can be implemented passively, for example with a spring, or actively, for example pneumatically, with an electric motor, etc.
  • the gripping devices 21 can be configured to be rotatable about their own axis in order to enable the workpieces W to be rotated between the individual stages S1 to S4.
  • the stretch rolling device 1 also has a shelf 30, according to the embodiment of FIG Figures 1a to 1c is arranged on the side opposite the working side AS.
  • the tray 30 can be set up to be stationary or movable along one or more degrees of freedom.
  • the Tray 30 can be provided passively so that the workpieces W are in a feed position ( Figure 1b , described in detail below) are placed on it or the tray 30 supports the workpieces W without actively gripping or clamping them.
  • the tray 30 can have retaining means 31 which are set up to temporarily retain the workpieces W, for example to grip or clamp them.
  • a separate transfer device for transferring the workpieces W to adjacent gripping devices 21 can be omitted.
  • the stretching device 1 according to the Figure 1a is in a retracted position in which all the workpieces W being processed, held by the respective gripping devices 21, are completely withdrawn from the nip formed by the pair of work rolls.
  • the manipulator 20 moves the workpieces W to the fully advanced position shown in FIG Figure 1b .
  • the gripping devices 21 enter the nip and, if necessary, pass through it with their front ends.
  • no rolling, ie no plastic deformation of the workpieces W by the rollers 10 takes place during this transfer.
  • the purpose of the transfer is to align the workpieces W, positioning them on the tray 30 and optionally rotating one or more of the workpieces W about their own axes, preferably 90°.
  • the transfer to the fully advanced position has an axial component, ie the workpieces are transversely in each shifted to the higher stage S2 to S4 (upward in the figures), as a result of which there is no workpiece W on the first stage S1 at the end of the transfer.
  • a new workpiece/blank Wn is fed to the first stage S1 by a feeder (not shown in the figures) by positioning it on the corresponding position of the tray 30.
  • the supply of a new workpiece Wn is in the Figure 1b represented by an arrow.
  • the feeding device can be implemented by a robot, for example, which takes the workpiece Wn from a storage container, furnace or the like (also not shown in the figures) and places it on the shelf 30 at the stage S1.
  • the feed device can be part of the stretching device or a separate component.
  • the finished workpiece Wf After the transfer into the completely advanced position, the finished workpiece Wf, which has completely passed through the rolling process, is also gripped by a delivery device (not shown in the figures) and discharged or removed from the process.
  • a delivery device (not shown in the figures) and discharged or removed from the process.
  • This step is in the Figure 1c is shown, with the delivery of the finished workpiece Wf being indicated by an arrow.
  • the delivery device can be implemented, for example, by a robot that grips the workpiece Wf and transfers it to a subsequent device, for example a transport device or a storage container.
  • the dispensing device can be part of the stretching device or a separate component.
  • the removal of the finished workpiece Wf by the discharger and the supply of a new workpiece Wn by the feeder may occur simultaneously, substantially simultaneously, or sequentially.
  • the grippers 21 can release their associated workpieces W and the manipulator 20 drives the grippers 21 substantially in the axial direction toward the first stage S1 (downward in the figures), where the first gripper 21 grips the newly fed work Wn and the other grippers 21 grip the adjacent work W of the preceding stage S2 to S4, respectively.
  • the transfer of the workpieces W is based on a comparison of the Figures 1b and 1c out.
  • this process stage can be regarded as the beginning of a work cycle—the workpieces W are rolled.
  • the workpieces W are gripped by the rolled profiles of the corresponding steps S1 to S4 of the rollers 10, transported by rotating the rollers 10 (in the opposite direction of rotation to the transfer into the advanced position) and plastically deformed.
  • the direction of rolling (to the left in the figures) is denoted herein by the reference character WR.
  • the stretching device comes back into the position of Figure 1a .
  • the rollers 10 can be driven continuously at a constant or variable speed.
  • the rollers 10 may be operated in a start/stop mode, such as by means of a direct drive and/or using a clutch and/or brake.
  • FIGS. 2a to 2c are schematic plan views of a stretching device 1 in different process stages according to a further embodiment. Since the structure and the process flows largely with those of the embodiment of Figures 1a to 1c match, essentially only the differences are set out below. This applies equally to the embodiment of Figures 3a to 3c as well as embodiment of Figures 4a to 4c .
  • the stretch rolling device according to Figures 2a to 2c differs from the previous embodiment essentially in that the shelf 30 is arranged on the working side AS.
  • the tray 30 can also be provided passively, so that the workpieces W are placed on it or the tray 30 supports the workpieces W without actively gripping or clamping them.
  • the tray 30 can have retaining means 31 which are set up to temporarily retain the workpieces W, for example to grip or clamp them.
  • the supply and discharge of the workpieces W is realized on the working side AS, as can be seen from FIGS Figures 2b and 2c emerges.
  • the tray 30 can be set up so that it can be moved in the axial direction.
  • Movability in the feed/retraction direction and/or up/down direction can also be implemented, for example to support or not to hinder the transfer of the workpieces W through the nip.
  • an advantage of the present embodiment is that Figures 2a to 2c in that the side opposite the working side AS, which is advantageously designed as a tool changing side, is not obstructed by the shelf 30 or has limited access.
  • the stretch rolling device can be maintained more easily and quickly.
  • Figures 1a to 1c and 2a to 2c implement the transfer of the workpieces W to the next higher level S2 to S4 essentially in that the manipulator 20 and/or its gripping devices 21 are moved in the axial direction.
  • the following two embodiments of the Figures 3a to 3c and 4a to 4c realize the conversion of the workpieces W essentially by moving the tray 30 in the axial direction.
  • the tray 30 is designed to be movable at least in the axial direction. It can be provided passively, so that the workpieces W are placed on it or the tray 30 supports the workpieces W without actively gripping or clamping them. Alternatively, the tray 30 can have retaining means 31 which are set up to temporarily retain the workpieces W, for example to grip or clamp them.
  • the tray 30 can be installed on the working side AS as shown in FIGS Figures 3a to 3c shown. Alternatively, the tray can be arranged on the side opposite the working side AS, as can be seen from FIGS Figures 4a and 4b emerges.
  • the tray 30 can alternatively or additionally be set up so that it can be moved in the advance/retraction direction between the two sides, ie the working side AS and the side opposite the working side AS. Furthermore, several shelves 30 can be provided, as exemplified by FIG Figure 4c emerges, for example if this improves or simplifies the handling of the workpieces W, or in order to be able to implement different process sequences with one and the same stretching rolling device 1 without considerable conversion measures.
  • the workpieces W of stages S1 to S4 usually have slightly different lengths.
  • gripping devices 21 have a length-compensating section 22 .
  • the length-compensating sections 22 can be implemented, for example, by a spring system that can deflect to different extents to compensate for the length of the gripping devices 21 .
  • a plastic deformation of the workpieces by the rollers 10 can also take place during the forward transfer, ie during the transfer into the advanced position.
  • the stretch-rolling concept presented here allows simultaneous occupation of all or at least several stages S1 to S4, for example every second stage. A reduced assignment of stages S1 to S4 may be necessary to comply with machine limits with regard to force or energy consumption. Nevertheless, the stretch-rolling device 1 enables the output of the workpieces W to be optimized due to the parallel configuration. This is achieved without the need for two manipulators on opposite sides of the pair of work rolls.
  • the manipulator on the working side AS is only expanded by further gripping devices 21, such as tongs, as a result of which the improved functionality is achieved without a significant increase in the structural and procedural complexity.
  • the transverse transport ie transport of the workpieces W in the axial direction
  • the transverse transport is implemented, for example, either by an additional transverse transport axis in the manipulator 20 in conjunction with a stationary tray 30 or by combining a stationary manipulator 20 in the axial direction with a tray 30 movable in the axial direction.

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

Claims (15)

  1. Dispositif de laminage par étirage pour le formage par pression de pièces à former (W) par l'intermédiaire d'un laminage, qui présente :
    une paire de cylindres de travail comprenant deux cylindres (10) qui sont respectivement rotatifs autour de leurs axes de cylindres et qui établissent une emprise entre eux; dans lequel les cylindres (10) mettent en oeuvre plusieurs étapes (S1 à S4) dans la direction axiale, qui sont conçues pour le formage pas à pas des pièces à former (W), en faisant en sorte que les pièces à former (W) franchissent de manière successive par les étapes (S1 à S4) ;
    un dispositif de manipulation (20) qui comprend plusieurs mécanismes de préhension (21) qui sont disposés sur un côté de travail (AS) de la paire de cylindres de travail et qui sont conçus pour saisir les pièces à former (W) et pour amener ces dernières à travers l'emprise à une étape correspondante (S1 à S4) dans une direction d'avant en arrière et vice versa ; et
    un dispositif de stockage (30) qui est conçu pour supporter de manière temporaire des pièces à former (W) et pour les transférer, en collaboration avec le dispositif de manipulation (20), à un autre mécanisme de préhension (21), de préférence le mécanisme de préhension voisin (21) de l'étape supérieure qui suit directement (S2 à S4) ; caractérisé
    en ce que les mécanismes de préhension (21) sont conçus pour saisir les pièces à former (W) à une extrémité et pour les amener, à travers l'emprise, à une étape correspondante (S1 à S4), tandis que les pièces à former (W) ne sont pas saisies à l'autre extrémité.
  2. Dispositif de laminage par étirage (1) selon la revendication 1, caractérisé en ce qu'un ou plusieurs mécanismes de préhension (21) sont conçus pour être rotatifs afin de mettre en oeuvre une rotation de la pièce à former (W) qui a été saisie, autour de son axe longitudinal, de préférence en formant un angle de 90°, entre les étapes correspondantes (S1 à S4).
  3. Dispositif de laminage par étirage (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de stockage (30) peut être soumis à un déplacement dans la direction axiale et/ou dans une direction d'avant en arrière et vice versa et/ou dans une direction de haut en bas et inversement ; dans lequel le dispositif de manipulation (20) est de préférence stationnaire.
  4. Dispositif de laminage par étirage (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de stockage (30) est disposé sur le côté de travail (AS) ou sur le côté qui est opposé au côté de travail (AS) dans la direction de laminage.
  5. Dispositif de laminage par étirage (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le nombre des mécanismes de préhension (21) est égal au nombre des étapes (S1 à S4) ; dans lequel l'attribution du mécanisme de préhension (21) à l'étape (S à S4) représente une attribution de un à un.
  6. Dispositif de laminage par étirage (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que les mécanismes de préhension (21) peuvent être soumis à un déplacement dans la direction axiale et/ou dans une direction d'avant en arrière et vice versa, par l'intermédiaire du dispositif de manipulation (20) ; de préférence le dispositif de manipulation (20) peut être soumis à un déplacement par rapport à la paire de cylindres de travail dans la direction axiale et/ou dans la direction d'avant en arrière et vice versa ; et dans lequel le dispositif de stockage (30) est de préférence stationnaire.
  7. Dispositif de laminage par étirage (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un mécanisme de préhension (21) peut être soumis à un déplacement d'une manière individuelle par rapport au dispositif de manipulation dans la direction d'avant en arrière et vice versa, dans le but de compenser un allongement différent des pièces à former (W) aux différentes étapes (S1 àS4).
  8. Dispositif de laminage par étirage (1) selon la revendication 7, caractérisé en ce que la mobilité individuelle des mécanismes de préhension correspondants (21) est mise en oeuvre de manière passive, de préférence à l'intervention d'un ressort, ou de manière active, de préférence par voie pneumatique ou par voie électromotrice.
  9. Dispositif de laminage par étirage (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le mécanisme de stockage (30) présente des moyens de retenue (31) qui sont conçus pour maintenir, de préférence pour agripper les pièces à former (W) d'une manière temporaire à des fins de transfert au mécanisme de préhension respectivement voisin (21) de l'étape supérieure qui suit directement (S2 à S4).
  10. Procédé de laminage par étirage pour le formage par pression de pièces à former (W) au moyen d'un dispositif de laminage par étirage (1) selon l'une quelconque des revendications précédentes, qui présente le fait de :
    saisir plusieurs pièces à former (W) par l'intermédiaire de respectivement un mécanisme de préhension (21) du dispositif de manipulation (20) ;
    amener les pièces à former (W), à travers l'emprise qui est établie par la paire de cylindres de travail, à une étape correspondante (S1 à S4) dans la direction d'avant en arrière et vice versa ;
    soumettre les cylindres (10) à une rotation et exercer une pression sur les pièces à former (W) par l'intermédiaire des cylindres (10), tant et si bien que les pièces à former sont soumises à un formage de manière correspondante à leur étape (S1 à S4) ;
    transporter les pièces à former (W) à une position de transfert et soutenir les pièces à former (W) par l'intermédiaire du dispositif de stockage (30) ;
    libérer les pièces à former (W) par l'intermédiaire des mécanismes de préhension (21) ; et
    saisir des pièces à former (W) par l'intermédiaire d'un autre mécanisme de préhension (21), de préférence le mécanisme de préhension voisin (21) de l'étape supérieure qui suit directement (S2 à S4) ; dans lequel
    les mécanismes de préhension (21) saisissent les pièces à former (W) à une extrémité et, en fonction de l'étape correspondante (S1 à S4), les amènent à travers l'emprise, tandis que les pièces à former (W) ne sont pas saisies à l'autre extrémité.
  11. Procédé de laminage par étirage selon la revendication 10, caractérisé en ce que l'on soumet à une rotation une ou plusieurs pièces à former (W) entre les étapes correspondantes (S1 à S4) autour de leurs axes longitudinaux, de préférence en formant un angle de 90°.
  12. Procédé de laminage par étirage selon la revendication 10 ou 11, caractérisé en ce que, à des fins de transfert des pièces à former (W) à un autre mécanisme de préhension (21), le dispositif de stockage (30) se déplace dans la direction axiale et/ou dans la direction d'avant en arrière et vice versa et/ou de haut en bas et vice versa.
  13. Procédé de laminage par étirage selon l'une quelconque des revendications 10 à 12, caractérisé en ce que, à des fins de transfert des pièces à former (W) à un autre mécanisme de préhension (21), les mécanismes de préhension (21) sont soumis à un déplacement par l'intermédiaire du dispositif de manipulation (20) dans la direction axiale et/ou dans la direction d'avant en arrière et vice versa ; dans lequel, de préférence, le dispositif de manipulation (20) soumis à un déplacement par rapport à la paire de cylindres de travail dans la direction axiale et/ou dans la direction d'avant en arrière et vice versa.
  14. Procédé de laminage par étirage selon l'une quelconque des revendications 10 à 13, caractérisé en ce qu'au moins un mécanisme de préhension (21) est soumis de manière individuelle à un déplacement en conformité avec l'allongement de la pièce à former correspondante (W) par rapport au dispositif de manipulation dans la direction d'avant en arrière et vice versa.
  15. Procédé de laminage par étirage selon la revendication 14, caractérisé en ce que le déplacement individuel des mécanismes de préhension correspondants (21) a lieu de manière passive, de préférence à l'intervention d'un ressort, ou de manière active, de préférence par voie pneumatique ou par voie électromotrice.
EP20772242.2A 2019-09-11 2020-09-10 Dispositif et procédé de laminage par étirage Active EP4028183B1 (fr)

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DE102019213833.0A DE102019213833A1 (de) 2019-09-11 2019-09-11 Reckwalzvorrichtung und Reckwalzverfahren
PCT/EP2020/075271 WO2021048246A1 (fr) 2019-09-11 2020-09-10 Dispositif et procédé de laminage par étirage

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EP4028183B1 true EP4028183B1 (fr) 2023-07-05

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WO (1) WO2021048246A1 (fr)

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US20220362827A1 (en) 2022-11-17
CN120790807A (zh) 2025-10-17
EP4028183A1 (fr) 2022-07-20
WO2021048246A1 (fr) 2021-03-18
DE102019213833A1 (de) 2021-03-11
US12246370B2 (en) 2025-03-11
CN114585459A (zh) 2022-06-03

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