EP0778094A1 - Dispositif de transfert dans presse de formages à postes multiples - Google Patents

Dispositif de transfert dans presse de formages à postes multiples Download PDF

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Publication number
EP0778094A1
EP0778094A1 EP96119403A EP96119403A EP0778094A1 EP 0778094 A1 EP0778094 A1 EP 0778094A1 EP 96119403 A EP96119403 A EP 96119403A EP 96119403 A EP96119403 A EP 96119403A EP 0778094 A1 EP0778094 A1 EP 0778094A1
Authority
EP
European Patent Office
Prior art keywords
gripper
transfer device
rails
fingers
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.)
Granted
Application number
EP96119403A
Other languages
German (de)
English (en)
Other versions
EP0778094B1 (fr
Inventor
Günter Riedisser
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.)
L Schuler GmbH
Original Assignee
L Schuler GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by L Schuler GmbH filed Critical L Schuler GmbH
Publication of EP0778094A1 publication Critical patent/EP0778094A1/fr
Application granted granted Critical
Publication of EP0778094B1 publication Critical patent/EP0778094B1/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
    • 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 transfer device for multi-stage presses, in particular for massive forming, with the features of the preamble of claim 1.
  • the invention relates to a transfer device for step presses, in which forming tools are arranged in a row.
  • Step presses are mostly used for extrusion, in which a desired blank is created from a solid blank through several successive forming steps. Separate tools are required for each forming step. The workpiece must therefore be transported from tool to tool between individual forming steps.
  • multi-stage presses the workpieces are arranged in a row on a common table. Associated top tools are also attached to a ram in a row.
  • the transfer device now has the task of conveying the workpieces from tool to tool in cycles, when the ram releases the tools.
  • massive forming is particularly suitable for mass production, in which large and recurrently identical workpiece lots have to be processed, massive forming is also increasingly being used for smaller workpieceless batches. Since the forming tools are used specifically to produce a single workpiece type, a tool change is required when setting up the multi-stage press on a specific workpiece or when converting.
  • the tool change should, if possible, not be hindered by gripper means which are provided in the area of the tools and which are provided on the transfer device for workpiece transport.
  • the transfer device used for the further transport of the workpieces generally has grippers which are adapted to a specific type of workpiece. In this case, in addition to the workpiece change, a gripper change is also required if the multi-stage press is to be converted.
  • DE 34 43 874 A1 discloses a transfer device for transferring workpieces in a multi-stage press.
  • This transfer device has a set of pliers held parallel to one another.
  • the arms are each arranged approximately at right angles to a line, which is defined by the row of successive workpieces.
  • the pliers are opened and closed at the individual tool positions, for which purpose separate drive devices are used. These have gear means provided on the arms and leading through them, which are driven by cam disks.
  • the pliers are provided with passive spring clamping devices.
  • Individual pliers are provided for the workpiece transfer, the drive and / or adjustment of which can be relatively complex.
  • a multi-stage forming machine for massive forming has a number of tool stages arranged in a row on a carrier, through which a solid blank has to pass.
  • a pair of pliers is used with two pliers boxes, which can be moved translationally synchronously with each other.
  • a plier box with rigid pliers is arranged on one side of the row defined by the tool stages and another plier box with spring-shaped pliers is arranged on the other side.
  • Each pliers box is driven in such a way that, in addition to its translatory movement, it can also perform an angular movement about its translation axis. In this way, opposing and associated pliers halves are moved towards and away from each other.
  • the transfer device should have a simple structure, work precisely, and be easily convertible itself.
  • the carrier means designed as gripper rails are arranged on one side of the tool row and therefore release the other side of the tools (front).
  • flap-like or cheek-shaped carrier means for the grippers are arranged on both sides of the workpieces, access to the tools is significantly easier. This is not paid for by the disadvantage of more complicated gripping devices, as would be the case when using gripping tongs or the like.
  • the basic construction according to claim 1 enables a precise and safe gripping of the workpieces and an exact insertion of the workpiece in the subsequent tool.
  • the gripper means are advantageously formed by grippers, each of which contains two gripper fingers.
  • the first gripper fingers are connected to the first gripper rail and the second gripper fingers are connected to the second gripper rail.
  • a translationally opposite adjustment of the gripper rails in their respective longitudinal direction thus allows all grippers to be opened and closed.
  • the opposite movement with respect to the workpiece enables the clamped workpiece to be held in the same position as the workpiece which is freely seated in the respective tool. In this way, tilting, canting or a slanted insertion of workpieces is reliably excluded.
  • the gripper fingers are designed to be resilient in a certain area, it is advantageous if they are essentially rigidly designed cantilevers which extend away from the respective gripper rail.
  • the gripper fingers have a simple design and the adjustment effort is limited to a minimum.
  • a solution which enables a particularly simple change of gripper is obtained if the gripper fingers are connected to an attachment rail which is detachably held on the gripper rail.
  • To replace the gripper all that is required is to change the top rails, in the simplest case only two screw connections have to be loosened per top rail.
  • the gripper fingers intended for each workpiece type remain firmly connected to the top rail and are pre-adjusted with respect to it.
  • the gripper rails are preferably carried by a common carrier device which is movably mounted in relation to the multi-station press and can be specifically adjusted by means of corresponding drive devices.
  • the carrier device can be raised and lowered and is adjustable in the longitudinal direction.
  • the gripper rails are held on the carrier device via slides or linear guides and are longitudinally adjustable in relation to the latter. As a result, the opening and closing movement of the gripper fingers can be obtained independently of the transport movement which is given to the carrier device as a whole.
  • the carrier device with both gripper rails and the gripper fingers held thereon can be pivoted from the vicinity of the tools into a rest position which is further away from the tools. In such a rest position, free access to the tools is provided, which enables a particularly simple tool change.
  • the carrier device and the gripper rails are preferably pivoted about an axis of rotation which is arranged parallel to the longitudinal extent of the gripper rails.
  • a mechanically particularly reliable, fast-running and precise construction of the transfer device according to the invention has a common drive means for the opposite longitudinal adjustment of the gripper rails for opening and closing the grippers and for the transfer movement, which is given synchronously to the carrier device and thus to both gripper rails.
  • a drive device is, for example, a central shaft with cam disks, which is connected to a worm drive via a gearwheel.
  • the axis of rotation of the worm wheel is also the axis of rotation about which the carrier device is pivoted into and out of its rest position when pivoted. In this way, the carrier device and the drive devices assigned to it can be pivoted about an otherwise stationary drive.
  • the solution is mechanically simple and robust.
  • the translational movement for opening and closing the gripper rails can be obtained in a simple manner by the gripper rails being carried by two crank cores which are mounted on the carrier device.
  • the advantage and the peculiarity of this solution lies in the fact that when the gripper fingers are transferred into the respective gripping position, an arc-shaped feed movement to the individual workpieces is carried out. As a result, the lateral feed movement of the gripper fingers disappears almost completely shortly before the gripper fingers come into contact with the workpiece. In spite of the gripper fingers being fed in laterally, a pure clamping movement with respect to the workpieces is achieved and lateral displacement and tilting of the workpieces is avoided.
  • the gripper rails are preferably driven via a toothed rack, which is mounted parallel to the gripper rails on the carrier device and is driven by a gear pinion. This in turn is over driven by a cardan shaft, which derives its movement from a cam.
  • the cardan shaft enables the translatory movement of the carrier device while driving the gear pinion without twisting it. In this way, the transfer movement (lifting, lowering, feed, ie synchronous movement of both gripper rails) is decoupled from the gripping movement (opposite movement of the gripper rails).
  • a multi-stage press 1 is shown in perspective and highly schematic, as it is used for the massive forming of workpieces over five tool stages.
  • the multi-stage press 1 has a table 2 on which a tool base frame 3 is mounted in a stationary manner.
  • the tool base frame carries a total of five tool stages with matrices 5a to 5e, which are only symbolically indicated on the basis of flat cylinders, which are referred to as matrices 5.
  • a plunger 8 is mounted in a press frame 7 toward and away from the dies 5. This carries the matrices 5a to 5e associated matrices 9a to 9e, which serve as the upper tools for shaping workpieces (not shown further) lying in the matrices 5a to 5e.
  • a transfer device 11 is provided for the further transport of the workpieces from the die 5a to 5d to the die 5b to 5e or for the insertion of the workpieces into the die 5a and for the removal of the finished formed workpiece from the die 5e , 13 and gripper fingers 14 (a to f), 15 (a to f) carried by these are indicated. Six gripper finger pairs are therefore provided for five tool stages.
  • a transfer station 17 which is only indicated schematically by a dash-dotted line and an exit station 18 which is likewise only indicated schematically and which are arranged at the beginning or end of the row of tools defined by the dies 5a to 5e.
  • the gripper rails 12, 13 are mounted on a common carrier 19 which can be moved in the vertical direction (lifting direction) and parallel to the longitudinal extent of the gripper rails 12, 13 (transport direction).
  • the transport direction is illustrated in FIG. 2 by an arrow 21, while the lifting direction is symbolized in FIG. 3 by an arrow 22.
  • the gripper fingers 14 (a to f) are provided at the end with a suitable gripper surface and aligned parallel to one another. At their end facing away from the dies 5, they are each rigidly connected to the gripper rail 12.
  • the gripper fingers 15 (a to f), which are also provided with corresponding gripping surfaces and are parallel to one another, are, however, firmly connected to the gripper rail 13.
  • the gripper rails 12, 13 can be moved with respect to one another.
  • the gripper rail 12 is carried by two crank cores 23, 24, which are rotatably mounted on the carrier 19 about a vertical axis.
  • the crank links 23, 24 thereby define a parallelogram with the gripper rail 12 and guide the gripper rail 12 on a circular path indicated by arrows 25.
  • the ends of the gripper fingers 14 (a to f) carry out a corresponding identical movement.
  • the gripper rail 13 is also carried by crank cores 27, 28 which are rotatably mounted parallel to one another on the carrier 19 and thus define a parallelogram with the carrier rail 13.
  • the length corresponds to the lengths of the crank links 23, 24.
  • the resulting movement of the gripper rail 13 and the gripper fingers 15 (a to f) is illustrated by arrows 29.
  • the crank links 23, 27 and the crank links 24, 28 are each in pairs via gear wheels 31, 32; 33, 34 engaged with each other.
  • the gears are so large and arranged that the crank links 23, 27; 24, 28 rotate in pairs in opposite directions at the same speed when they are driven.
  • a rack 36 is provided, which is mounted on the carrier 19 so as to be longitudinally displaceable.
  • the rack 36 drives the crank link 24 via a gear 38 shown in FIG. 3, which in turn drives the crank link 28 in opposite directions.
  • the toothed rack 36 drives the crank link 23, which in turn drives the crank link 27, via a gear wheel (not shown further).
  • a rotation of the crank links 23, 27; 24, 28 and thus a relative movement of the gripper rails 12, 13 only comes about when the toothed rack 36 is displaced with respect to the carrier 19.
  • a gear pinion 39 is rotatably mounted on the carrier 19 and is in engagement with the rack 36.
  • the gear pinion 39 is connected to a drive source 42 via a cardan shaft 41, the cardan shaft 41 permitting a translational movement of the gear pinion 39 in the direction of the arrow 21 without causing the gear pinion 39 to rotate.
  • a control shaft 43 which is driven by a worm 45 (FIG. 3) via a gear 44, serves as the drive source 42 for the gear pinion 39 and thus for opening and closing the pairs of gripper fingers.
  • the continuously rotating worm 45 drives the control shaft 43 in synchronism with the working strokes of the tappet 8.
  • a cam plate 47 brings about a periodic, targeted movement of the gear pinion 39 via a lever and gear tap, not shown.
  • Further cams 49, 50 effect the transport or feed movement of the carrier 19 in the direction of the arrow 21 via a lever drive (not shown).
  • the lifting and lowering of the carrier 19, on the other hand, is derived from a cam 51 which is seated on the control shaft 43 and via corresponding ones Lever gear causes the lifting and lowering of the carrier 19.
  • the transfer device 11 including the control shaft 42, forms a structural unit which, as indicated in FIG. 3, can be pivoted out of the working position into a rest position.
  • the gripper fingers 14, 15 cover the path 53 indicated by the broken line. Your rest position is indicated at 54.
  • the pivot axis is the axis of rotation of the worm 45, the gear 44 also being pivoted about the worm 45.
  • the multi-stage press 1 described so far operates as follows:
  • the gripper fingers 14, 15 (a to f) are in an almost closed and retracted position.
  • the crank links 23, 27; 24, 28 rotated by approximately 180 ° relative to the respective position shown in FIG. 2.
  • the gripper rails 12, 13 are in their position as far as possible from the dies 5 (a to e).
  • the cam disks 49, 50 cause the carrier 19 to be displaced in the direction of the transfer station 17, ie to the left in FIG. 2.
  • crank links 23, 24 run counterclockwise
  • crank links 27, 28 in FIG. 2 also rotate clockwise from their position facing away from the dies 5 (a to e) into the position shown, to be pointed towards them.
  • the gripper fingers 14, 15 close like pliers each on a circular arc, which is indicated by the arrows 25, 29.
  • the workpieces lying in the transfer station 17 and the subsequent tool stations are gripped and thus clamped by the gripping fingers 14, 15.
  • a slope-free area of the cam plate 47 is reached so that the gear pinion 39 does not continue to rotate.
  • the cam disc 51 now controls a lifting movement, whereby the carrier 19 with the gripper rails 12, 13, the grippers 14, 15 and the workpieces located therein is lifted. Shortly afterwards or overlapping in time, the transfer movement caused by the cam disks 49, 50 begins to the right in FIG. 2, ie toward the failure station 18. The stroke of the transfer movement corresponds exactly to a distance between the matrices 5 (a to e) which are evenly spaced from one another.
  • the carrier 19 is lowered and the crank links 23, 27; via the cam disk 47, the cardan shaft 41, the gear pinion 39 and the toothed rack 36. 24, 28 driven so that the gripper rails 12, 13 are pivoted away from the matrices 5 in opposite arcs.
  • the gripper fingers 14, 15 perform semi-circular opening movements (arrows 25, 29). To Termination of the same, the patrices 9 attached to the plunger 8, which are already moving downward, hit the workpieces and deform them accordingly.
  • the illustrated transfer device 11 With the illustrated transfer device 11, a secure gripping of the workpieces is achieved.
  • the grippers move towards or away from the workpiece in question in almost exactly opposite directions. This means that the workpiece is not given any momentum that could lead to tilting or tilting. Due to the forced guidance of all movements required for workpiece transport, derived from a single drive source (worm 45), a precise execution of all movements is achieved.
  • the entire transfer device 11 forms a unit that can be removed from the tool area in a simple folding movement. This serves both to change the tools and to change the gripper rails 12, 13 or individual gripper fingers 14, 15.
  • the gripper fingers 14, 15 can be held on attachment rails which are carried by the gripper rails 12, 13.
  • Such an embodiment has the advantage that the gripper fingers can be easily replaced with a few simple steps when converting to other workpieces to be machined. This significantly improves the usability of the tool room and makes tool changing easier. Manual removal of the gripper rails is not required if measures are to be carried out on the tools.
  • a transfer device for a multi-stage press has two bearings mounted parallel to one another on a carrier Gripper rails that are movable with the carrier along a transfer curve.
  • the gripper rails carry paired gripper fingers which can be moved towards and away from one another by counter-movement of the gripper rails.
  • the infeed movement is generated by parallelogram gears, which are used to support and drive the gripper rails.
  • the parallelogram gears are driven by a single drive source via a cardan shaft, which enables the transfer movement to be carried out without changing the relative position of the gripper fingers.
  • Such a transfer device is arranged on one side of the row formed by the tools and thus enables good access to the workpieces from the other side. If necessary, the entire transfer device can be removed from the tool area. This is preferably done in a pivoting movement.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Specific Conveyance Elements (AREA)
EP96119403A 1995-12-07 1996-12-04 Dispositif de transfert dans presse de formages à postes multiples Expired - Lifetime EP0778094B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19545570 1995-12-07
DE19545570A DE19545570A1 (de) 1995-12-07 1995-12-07 Transfereinrichtung für Mehrstationenpressen

Publications (2)

Publication Number Publication Date
EP0778094A1 true EP0778094A1 (fr) 1997-06-11
EP0778094B1 EP0778094B1 (fr) 2001-04-04

Family

ID=7779383

Family Applications (1)

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EP96119403A Expired - Lifetime EP0778094B1 (fr) 1995-12-07 1996-12-04 Dispositif de transfert dans presse de formages à postes multiples

Country Status (4)

Country Link
US (1) US5775163A (fr)
EP (1) EP0778094B1 (fr)
DE (2) DE19545570A1 (fr)
ES (1) ES2156609T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2233221A2 (fr) 2009-03-18 2010-09-29 Sacel Srl Dispositif de poinçonnage pour une machine de poinçonnage à coupe continue d'éléments de poinçonnage métalliques
CN117840280A (zh) * 2024-03-08 2024-04-09 山西盛福昌管业有限公司 一种镀锌弯折机
CN117884691A (zh) * 2024-03-14 2024-04-16 山西省平遥县煜盛机械加工有限公司 炉门框专用铣床

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* Cited by examiner, † Cited by third party
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DE19819965A1 (de) * 1998-05-05 1999-11-11 Schuler Pressen Gmbh & Co Traversen-Dreiachstransfer
DE19962607B4 (de) * 1999-12-23 2007-08-02 Schuler Pressen Gmbh & Co. Kg Werkzeugkassette mit federnder Matrize
US6727602B2 (en) * 2001-01-29 2004-04-27 Broadcom Corporation Power supply for controlled parallel charging and discharging of batteries
US7261970B2 (en) * 2004-04-23 2007-08-28 Ovonic Battery Company Inc. Nickel metal hydride battery design
CN104156626B (zh) * 2014-08-29 2017-10-13 长城汽车股份有限公司 传动装置的传动优化方法及系统
CH712401A1 (de) * 2016-04-28 2017-10-31 Hatebur Umformmaschinen Ag Transportvorrichtung zum Umsetzen von Werkstücken in einer mindestens zwei Stufen umfassenden Bearbeitungseinrichtung.
CH712403A1 (de) 2016-04-28 2017-10-31 Hatebur Umformmaschinen Ag Transportverfahren zum Umsetzen von Werkstücken zwischen mehreren aufeinanderfolgenden Stufen einer Bearbeitungseinrichtung.
CN108994235A (zh) * 2018-06-29 2018-12-14 平湖市钱江机械制造有限公司 一种棒料的夹持机构
CN115780646B (zh) * 2023-02-06 2023-04-28 新乡市万新电气有限公司 一种电容器底盖的加工装置及其加工方法
CN117862598A (zh) * 2023-12-25 2024-04-12 江苏旭晟电器成套设备有限公司 一种母线槽直线段防火槽连续开槽设备

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Publication number Priority date Publication date Assignee Title
DE2432194A1 (de) * 1973-07-19 1975-02-06 Vyzk Ustav Tvarecich Stroju Uebertragungsvorrichtung einer automatischen mehrstufenpresse
EP0041690B1 (fr) 1980-06-10 1984-03-28 Hatebur Umformmaschinen AG Machine-outil à plusieurs étages travaillant le métal par formage
DE3443874A1 (de) 1984-12-01 1986-07-10 L. Schuler GmbH, 7320 Göppingen Vorrichtung zum foerdern von werkstuecken in einer mehrstufenpresse fuer die massivumformung

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US2544218A (en) * 1945-08-03 1951-03-06 Burdsall & Ward Co Transfer mechanism
US3165766A (en) * 1961-08-29 1965-01-19 Nat Machinery Co Transfer for metal forming machine
FR2191316B1 (fr) * 1972-06-27 1976-10-29 Jeumont Schneider
SU747588A1 (ru) * 1978-05-03 1980-07-15 Воронежское производственное объединение по выпуску тяжелых механических прессов Устройство дл перемещени заготовок
US4631950A (en) * 1984-05-17 1986-12-30 The National Machinery Company Progressive former with removable tooling
US4898017A (en) * 1988-08-09 1990-02-06 The National Machinery Company Quick-change tooling for progressive formers and the like

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2432194A1 (de) * 1973-07-19 1975-02-06 Vyzk Ustav Tvarecich Stroju Uebertragungsvorrichtung einer automatischen mehrstufenpresse
EP0041690B1 (fr) 1980-06-10 1984-03-28 Hatebur Umformmaschinen AG Machine-outil à plusieurs étages travaillant le métal par formage
DE3443874A1 (de) 1984-12-01 1986-07-10 L. Schuler GmbH, 7320 Göppingen Vorrichtung zum foerdern von werkstuecken in einer mehrstufenpresse fuer die massivumformung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2233221A2 (fr) 2009-03-18 2010-09-29 Sacel Srl Dispositif de poinçonnage pour une machine de poinçonnage à coupe continue d'éléments de poinçonnage métalliques
CN117840280A (zh) * 2024-03-08 2024-04-09 山西盛福昌管业有限公司 一种镀锌弯折机
CN117840280B (zh) * 2024-03-08 2024-05-14 山西盛福昌管业有限公司 一种镀锌弯折机
CN117884691A (zh) * 2024-03-14 2024-04-16 山西省平遥县煜盛机械加工有限公司 炉门框专用铣床
CN117884691B (zh) * 2024-03-14 2024-05-31 山西省平遥县煜盛机械加工有限公司 炉门框专用铣床

Also Published As

Publication number Publication date
ES2156609T3 (es) 2001-07-01
US5775163A (en) 1998-07-07
DE59606707D1 (de) 2001-05-10
DE19545570A1 (de) 1997-06-12
EP0778094B1 (fr) 2001-04-04

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