EP0621092B1 - Dispositif de transfert des pièces dans une presse à plusieurs étapes - Google Patents

Dispositif de transfert des pièces dans une presse à plusieurs étapes Download PDF

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Publication number
EP0621092B1
EP0621092B1 EP94103144A EP94103144A EP0621092B1 EP 0621092 B1 EP0621092 B1 EP 0621092B1 EP 94103144 A EP94103144 A EP 94103144A EP 94103144 A EP94103144 A EP 94103144A EP 0621092 B1 EP0621092 B1 EP 0621092B1
Authority
EP
European Patent Office
Prior art keywords
press
cross arm
workpiece
gripper
stage
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
EP94103144A
Other languages
German (de)
English (en)
Other versions
EP0621092A1 (fr
Inventor
Erich Harsch
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.)
Maschinenfabrik Mueller Weingarten AG
Mueller Weingarten AG
Original Assignee
Maschinenfabrik Mueller Weingarten AG
Mueller Weingarten AG
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 Maschinenfabrik Mueller Weingarten AG, Mueller Weingarten AG filed Critical Maschinenfabrik Mueller Weingarten AG
Publication of EP0621092A1 publication Critical patent/EP0621092A1/fr
Application granted granted Critical
Publication of EP0621092B1 publication Critical patent/EP0621092B1/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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
    • B21D43/055—Devices comprising a pair of longitudinally and laterally movable parallel transfer bars

Definitions

  • the invention relates to a device for transporting workpieces in a step press according to the preamble of claim 1.
  • the known device proposes a cross-member between the gripper rails, on which a boom is arranged in the region of the separation point, at the end of which an additional part support is provided.
  • the parts support can also perform an up and down movement by means of a guide carriage in order to reach under the workpiece for transport.
  • a workpiece transport device is also known, in which an additional workpiece support also takes place.
  • the workpiece support primarily does not serve to support cut double parts, but rather to support relatively wide workpieces at high working speeds in order to prevent the workpieces from fluttering.
  • a support slide which is arranged between the gripper tongs and acting parallel to it.
  • a longitudinal displacement of the support slide i. H. a movement transverse to the direction of transport of the parts, provided to position the support slide between the gripper tongs below the workpiece.
  • the invention has for its object to develop a device for transporting workpieces in a step press in such a way that a very simple support option for the workpiece during transport of the same within the press is made possible.
  • the transport device should be as simple and easy as possible insensitive to malfunction and built with low mass.
  • the device according to the invention with the characterizing features of claim 1 has the advantage over the known devices that the simplest possible, but very flexible transport system is created, which is particularly suitable for the use of the transport of separate parts in the last tool stage. Double parts with very different external contours can also be easily detected by means of the device according to the invention, since the additional transport device is designed to be very flexible and universal with regard to workpiece support.
  • the core concept of the transport device according to the invention is that the parts to be transported are supported as close as possible to their separation point.
  • a simple transverse arm extending from the gripper rail is provided, which protrudes into the working space or the tool step and grips under the workpiece to be supported by means of a cantilever extending in the longitudinal direction of the press.
  • a relative movement takes place between the gripper rail and the additional transport device in order to reach under the workpiece.
  • the transport device Due to the very simple design of the holding shoe that grips under the workpiece and its attachment to the gripper rail part that can be uncoupled when the tool is changed, a change of the parts or the associated tools a very simple replacement of these, the support parts under the workpiece possible. Furthermore, the transport device also has very small movable masses, which cause low vibration behavior in the transfer system.
  • the device according to the invention is particularly suitable for supporting the double parts separated in the last tool stage during the further transport of these workpieces. However, it can also be used in other tool stages to support large parts. In this case, the device according to the invention can always be moved out of the tool space during a tool change by means of sliding tables and can be changed with the changed tools.
  • the device according to the invention is designed with a cross arm which is fastened to the gripper rail on a longitudinal guide or curve guide, the cross arm being movable relative to the gripper rail in the horizontal and vertical direction of the step press.
  • An alternative embodiment provides that the boom running in the longitudinal direction of the press performs a one or two-axis movement in order to get below the workpiece with its holding or supporting shoe.
  • the transport device is expediently designed in such a way that opposite transverse arms are fastened to the opposite gripper rails and protrude transversely into the press space to the extent necessary for supporting the parts.
  • a single arm can also be provided which extends beyond at least the center line of the press has appropriate means to reach under the individual parts.
  • the cross arms can of course also be designed telescopically in order to protrude into the press space with variable lengths. In this way, any adaptation to different workpieces can be achieved. In general, however, the cross arms are moved out of the press room by means of the sliding tables when the tool is changed and replaced on a workpiece-specific basis.
  • the embodiment of the invention is a step press, as described in the above-mentioned patent specification No. 37 12 838 of the applicant. Reference is hereby expressly made to the content of this patent specification for explaining a stepped press according to the present invention. The same applies to the problem of removing double parts from the last tool stage that was mentioned there.
  • Figures 1 and 2 show the last tool stage 2 of such a stage press 1 in plan view, Fig. 3 seen in a corresponding end view from the end of the press.
  • Reference number 4 shows a press ram
  • reference number 5 shows a press table for receiving a tool of the tool stage, not shown.
  • the press table 5 is designed as a sliding table and can be moved laterally out of the press.
  • Tool level 2 is limited by the four press stands 6, 6 'and 7, 7'.
  • the entire step press is penetrated by two gripper rails 9, 9 ', which are also referred to as longitudinal transfer bars. As shown schematically in FIGS. 1 and 3 on the gripper rail 9, these are each slidable back and forth both in the longitudinal direction (X-axis), ie in the longitudinal direction of transport, and in the transverse direction (Y-axis). Furthermore, as shown in FIG. 3, the gripper rails can also be moved up and down, which is shown with the Z axis specified there. The longitudinal movement within the press is used to transport the workpieces from tool level to tool level.
  • the gripper rails 9, 9 ' are each formed in gripper rail sections with the separating points 10 in order to at least partially move them out by means of the sliding table during a tool change.
  • the tool stage 2 contains the workpiece 11, which is designed as a double part and comprises two individual parts 12, 13. These individual parts are connected to one another during the entire press run up to the last tool stage via a connecting web 14 or the like, so that the double part can be held in a manner known per se by laterally arranged gripper tongs 15, 16. 1, two gripper tongs 15, 15 'and 16, 16' are arranged laterally of the double part 11 and encompass the workpiece at a suitable point. The gripper tongs are fastened to the gripper rails and carry out the movements of the gripper rails 9, 9 '.
  • the workpiece 11 which is designed as a double part, can be transported in half step steps by means of the gripper rails through the press, the three-dimensional movement of the gripper rails serving to grasp the workpiece in the tool space and to raise the workpiece from the lower tool.
  • the longitudinal movement of the gripper rail then transports the raised workpiece to an empty stage arranged between the press stands or from such an empty stage to the next press station. Before the press stroke is carried out, the gripper rails move out of the tool room to the side.
  • the transport device provides that an additional parts support device 17, 18 is provided on the gripper rails 9, 9 ', which engages under the separate parts 12, 13 and supports them for the transport step.
  • this parts support device 17, 18 is shown in its starting position. It consists in each case of a transverse arm 19 which is arranged transversely to the transport direction (X-axis) and is mounted laterally in a carriage 20.
  • the carriage 20 is in turn slidably mounted in two longitudinal guides 21, 21 'in the longitudinal direction of the press (X-axis), the longitudinal guides 21, 21' being arranged on the gripper rails 9, 9 '.
  • the respective slide 20 can thus be moved relative to the respective gripper rail 9, 9 'over the length l 1 of the longitudinal guide rods 21, 21'.
  • the left transverse arm 19 shown in FIG. 4 executes a longitudinal movement along the distance l 2 and reaches the under-gripping position of the left workpiece 12 shown in FIG. 2.
  • the support or gripping device 23 At the end 22 of the gripper arm 19 there is one in the longitudinal direction of the support or gripping device 23 is provided, which moves as a holding shoe or support arm under the workpiece 12.
  • the workpiece can also be gripped laterally in some other way. Accordingly, the device 23 can also be designed as gripping tongs or the like.
  • the right workpiece 13 has different external dimensions than the left workpiece 12. If the right carriage 20 for displacing the right transverse arm 19 is to carry out the same axial longitudinal displacement as the left carriage 20 for displacing the left transverse arm 19, an additional telescopic arm or bracket 24 is attached to the end 22 of the transverse arm 19 to bridge the differential distance l 3 to carry out a path adjustment.
  • the right-hand slide 20 can optionally carry out a longitudinal movement on the longitudinal guides 21 that is larger by the difference l 3 .
  • the two transverse arms 19 can also perform an upward and downward movement, that is to say a pivoting movement along the arrow 25, the pivot point 26 being in the region of the slide 20.
  • This upward and downward movement serves to properly grip the workpiece and to avoid a collision with the deposited workpieces 12, 13 when the gripper rails 9, 9 'return from the storage station in the swung-up position.
  • the lever arm 19 is extended beyond the pivot point 26 by an amount l 4 to form a rocker-shaped arrangement.
  • the extended arm 31 has at its outer end a guide roller 27 which is arranged in a link guide 28 in a housing 29 which is laterally attached to the gripper rail. In Fig. 5 the side view of this link guide is shown again.
  • the link 28 has a shape or a course which corresponds to the required course of movement of the transverse arm 19, 19 'in this respect, on the one hand from a starting position below to get the workpiece (support and transport position) and on the other hand to get over the workpiece from its interference area when driving back. If the respective slide in FIG.
  • FIG. 4 shows the execution of a transport step for transporting the respective workpieces 12, 13 into the storage stage 8 'arranged between the stands 7, 7'.
  • the two transverse arms 19 move out of engagement with the workpieces 12, 13 through the described two-axis displacement as a relative movement with respect to the gripper rails 9, 9 '.
  • the cross arms 19 then reach the position shown in dashed lines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)

Claims (10)

  1. Dispositif pour transporter des pièces dans une presse à étages, dans lequel les pièces (11 à 13) sont transportées, d'un étage d'outil à l'autre, par des pinces ou analogues fixées à des rails de prise (9,9') déplaçables de façon tridimensionnelle, au moins un bras transversal (19) fixé au rail (9,9'), agencé latéralement à la pièce (11 à 13), et supportant celle-ci étant prévu,
    caractérisé en ce que le bras transversal (19) pénètre dans l'espace de presse et peut être pivoté et/ou déplacé dans la direction de transport par rapport au rail (9,9') ou à la pièce (11 à 13).
  2. Dispositif selon la revendication 1,
    caractérisé en ce que le bras transversal (19) est fixé dans un guide longitudinal (21,21') prévu sur le rail (9,9').
  3. Dispositif selon la revendication 1 ou 2,
    caractérisé en ce que le bras transversal (19) est monté ou guidé dans un chariot (20) longitudinalement déplaçable.
  4. Dispositif selon la revendication 3,
    caractérisé en ce que le bras transversal (19) est monté dans une charnière (26) sur le rail (9,9').
  5. Dispositif selon la revendication 4,
    caractérisé en ce qu'un tronçon de bras (31) faisant saillie au-dessus de la charnière (26) du bras transversal (19) est guidé, à son extrémité, dans un guide à coulisse (28) ou un guide à voie, de sorte que le bras transversal (19) effectue un mouvement de pivotement et/ou longitudinal.
  6. Dispositif selon une des revendications précédentes, caractérisé en ce que le bras transversal présente avantageusement, à son extrémité en regard de l'espace de presse, un patin de maintien (23) tourné vers la pièce dans la direction longitudinale de la presse et/ou une pince de serrage et/ou un organe de prise ou analogue.
  7. Dispositif selon la revendication 6,
    caractérisé en ce que le patin de maintien (23) peut être réglé dans sa position longitudinale par l'intermédiaire d'un bras supplémentaire (24) orienté dans la direction longitudinale de la presse.
  8. Dispositif selon une des revendications précédentes, caractérisé en ce que le bras transversal (19) est réalisé de façon télescopiquement déplaçable sur sa longueur.
  9. Dispositif selon une des revendications précédentes, caractérisé en ce que deux rails de prise opposés (9,9') présentent, à chaque fois, un bras transversal (19), lesquels bras sont différemment réglables en ce qui concerne leur position et sont agencés, de préférence, dans le dernier étage d'outil d'une presse à étages.
  10. Dispositif selon une des revendications précédentes, caractérisé en ce que la pièce (11) est retirée dans le dernier étage de presse et les pièces individuelles (12,13) peuvent être supportées au moyen des bras transversaux (19,19') lors du transport ultérieur.
EP94103144A 1993-04-23 1994-03-03 Dispositif de transfert des pièces dans une presse à plusieurs étapes Expired - Lifetime EP0621092B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4313416 1993-04-23
DE4313416A DE4313416A1 (de) 1993-04-23 1993-04-23 Vorrichtung zum Transport von Teilen in einer Stufenpresse

Publications (2)

Publication Number Publication Date
EP0621092A1 EP0621092A1 (fr) 1994-10-26
EP0621092B1 true EP0621092B1 (fr) 1996-09-18

Family

ID=6486256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94103144A Expired - Lifetime EP0621092B1 (fr) 1993-04-23 1994-03-03 Dispositif de transfert des pièces dans une presse à plusieurs étapes

Country Status (4)

Country Link
US (1) US5595087A (fr)
EP (1) EP0621092B1 (fr)
DE (2) DE4313416A1 (fr)
ES (1) ES2094576T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19542203A1 (de) * 1995-11-13 1997-05-15 Schuler Pressen Gmbh & Co Umrüstbare Mehrstationenpresse
DE19542205A1 (de) * 1995-11-13 1997-05-15 Schuler Pressen Gmbh & Co Presse mit kombinierter Transfereinrichtung
DE19819965A1 (de) * 1998-05-05 1999-11-11 Schuler Pressen Gmbh & Co Traversen-Dreiachstransfer
JP4483306B2 (ja) * 2004-01-16 2010-06-16 トヨタ自動車株式会社 タンデムプレス装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2718646A1 (de) * 1977-04-27 1978-11-09 Schuler Gmbh L Werkstuecktransportvorrichtung
US4693361A (en) * 1982-10-05 1987-09-15 Kabushiki Kaisha Komatsu Seisakusho Transfer press
JPS59163038A (ja) * 1983-03-07 1984-09-14 Nissan Motor Co Ltd トランスフアプレスにおけるワ−ク搬送用フインガ−の位置調整装置
DE3335928A1 (de) * 1983-10-04 1985-04-18 L. Schuler GmbH, 7320 Göppingen Einrichtung zum zufuehren von blechzuschnitten zur ziehstufe einer mehrstufenpresse
DE3507676A1 (de) * 1985-03-05 1986-09-11 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Vorrichtung zum verschieben von greifern auf den greiferschienen einer stufenpresse
DE3537269C2 (de) * 1985-10-19 1993-11-11 Schuler Gmbh L Vorrichtung zum Kuppeln von Leitungen an Transferschienen einer Transferpresse
JPS62101636A (ja) * 1985-10-29 1987-05-12 Nitto Electric Ind Co Ltd 表面保護材
DE3712838A1 (de) * 1987-04-15 1988-11-03 Mueller Weingarten Maschf Vorrichtung zum entnehmen von doppelteilen aus der letzten werkzeugstufe einer stufenpresse
JPH0295620A (ja) * 1988-09-30 1990-04-06 Toppan Printing Co Ltd ローラーコンベア装置

Also Published As

Publication number Publication date
EP0621092A1 (fr) 1994-10-26
ES2094576T3 (es) 1997-01-16
DE4313416A1 (de) 1994-10-27
DE59400660D1 (de) 1996-10-24
US5595087A (en) 1997-01-21

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