EP0754509A1 - Dispositif de transfert dans une machine de formage - Google Patents

Dispositif de transfert dans une machine de formage Download PDF

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Publication number
EP0754509A1
EP0754509A1 EP95111326A EP95111326A EP0754509A1 EP 0754509 A1 EP0754509 A1 EP 0754509A1 EP 95111326 A EP95111326 A EP 95111326A EP 95111326 A EP95111326 A EP 95111326A EP 0754509 A1 EP0754509 A1 EP 0754509A1
Authority
EP
European Patent Office
Prior art keywords
press
transfer
transfer device
sheet metal
metal parts
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.)
Withdrawn
Application number
EP95111326A
Other languages
German (de)
English (en)
Inventor
Karl Thudium
Peter Dr.-Ing. Klemm
Hans Hofele
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
Priority to EP95111326A priority Critical patent/EP0754509A1/fr
Publication of EP0754509A1 publication Critical patent/EP0754509A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B21D43/052—Devices having a cross bar

Definitions

  • the invention relates to a transfer press u. Like. Forming machine with a transfer device according to the preamble of claim 1.
  • transfer devices are required in order to transfer sheet metal parts from processing stage to processing stage, possibly with a clipboard.
  • the invention is applicable to various previously known conversion systems, e.g. to those with gripper rails extending through the forming machine and in its longitudinal extent, with active and passive gripping tools as holding means for gripping the sheet metal parts.
  • Another transfer system consists of running rails extending in the longitudinal extent of the forming machine, on which suction bars are slidably mounted as holding means or on which suction bars are fastened so that they can be coupled.
  • a common feature of the different transfer systems is a lifting and lowering movement for lifting the sheet metal parts out of the respective lower tool part or for depositing the sheet metal parts in the subsequent processing step.
  • DE 32 13 381 A1 describes a device for supporting the gripper rails in a transfer press. This device is intended to prevent sagging and vibrating movements of the gripper rails.
  • a crossbar is arranged between two lifting and locking boxes, the form - are connected to the gripper rail drives by a rack and pinion connection. Disadvantages also apply here, and the total mass to be moved is increased significantly.
  • a device for conveying workpieces to be machined in a press with drive means for displacing and lifting gripper rails is known from German Offenlegungsschrift 14 52 769.
  • the drive means are directly assigned to the movements, the drive means for lifting and lowering acting from below through a console carrying the drive means and movement deflection means for the transverse movement, that is to say not directly on the gripper rail.
  • the drive means are fluid-loaded piston-cylinder units that only allow precise infeed via stops or do not allow a change in the basic height.
  • inertia and control and response times of the drives have a negative effect on the number of strokes.
  • the object of the invention is a play-free drive for the lifting-lowering movement with high rigidity due to the use of only one transmission member.
  • the lifting and lowering movement is advantageously freely programmable with synchronous operation of all motors.
  • the use of such servomotors made it possible to overcome the disadvantageous effect of the backlash that was previously found in gear chains, e.g. by pressure cylinder, can only be achieved with great effort.
  • the forming machine shown here a transfer press, has processing stages 1, 2 with rams 4, 5 rising and falling, tool upper parts 10 attached to these and tool lower parts 11 attached to sliding tables 8, 9.
  • Position code number 3 overall identifies a transfer device, each with one in front of and one behind the processing stages in the longitudinal extent of the transfer press 13 extending on the rails, carriages 14, 15 via linkage 20, 21 and movable in the movement curves 30, 31.
  • Carriages located opposite each other in pairs on the running rails are connected by one or more suction bars 16. These form the holding means for the sheet metal parts.
  • the conversion movements of the carriages in the curves 30, 31 have horizontal movement components which are generated by the curve taps by means of cam follower levers 18, 19 and vertical movement components which are produced by raising and lowering the running rails.
  • the lifting and lowering in the direction of the double arrow 26 is effected by servomotors 22, 23, which, as shown, are arranged above the transport plane of the sheet metal parts 17, overall above the height of the lead curve 30.
  • the invention also provides the possibility of arranging the servomotors 22, 23 below the transport plane.
  • the transfer device could be one with gripper rails and gripping tools, in which the lifting and lowering movement can be effected in the same way, moved in two or three axes, by servomotors.
  • the press section shown in FIG. 2 in the area of one of the stands 6, 7 shows the suspension of a running rail 13.
  • Carriages 14, 15 can be displaced on the running rail.
  • Each of the servomotors 22, 23 has a hollow axis, a so-called hollow shaft rotor 29, on which a spindle nut 28 is fixed.
  • the spindle nut which can be a pretensioned spindle nut, interacts with a spindle 24, 25 which is rigidly connected directly to the running rail or, as shown, indirectly via an eccentric structure 27.
  • Eccentric structure serves for an adjustment movement of the running rails outwards and backwards, as is explained in more detail in EP 0 384 188 A2.
  • a kit spindle motor with hollow shaft rotor from Mannesmann Rexroth, Indramat GmbH, which is equipped with a high-resolution encoder, can serve as the servo motor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
EP95111326A 1995-07-19 1995-07-19 Dispositif de transfert dans une machine de formage Withdrawn EP0754509A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95111326A EP0754509A1 (fr) 1995-07-19 1995-07-19 Dispositif de transfert dans une machine de formage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95111326A EP0754509A1 (fr) 1995-07-19 1995-07-19 Dispositif de transfert dans une machine de formage

Publications (1)

Publication Number Publication Date
EP0754509A1 true EP0754509A1 (fr) 1997-01-22

Family

ID=8219445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95111326A Withdrawn EP0754509A1 (fr) 1995-07-19 1995-07-19 Dispositif de transfert dans une machine de formage

Country Status (1)

Country Link
EP (1) EP0754509A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972586A2 (fr) 1998-07-15 2000-01-19 Müller Weingarten AG Procédé pour la commande d' actionnement d'une presse de transfert pour grandes pièces et dispositif pour réaliser ce procédé

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1452769A1 (de) 1963-11-12 1969-05-29 Mueller Fritz Pressenfab Vorrichtung zum Foerdern von durch eine Presse zu bearbeitenden Werkstuecken
DE2632593A1 (de) 1975-07-22 1977-02-03 Aida Eng Ltd Dreidimensionale vorschubvorrichtung fuer eine stufenpresse
DE3213381A1 (de) 1982-04-10 1983-10-20 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Vorrichtung zum unterstuetzen der greiferschienen in einer transfer-presse
EP0384188A2 (fr) 1989-02-18 1990-08-29 SCHULER PRESSEN GmbH & Co. Dispositif de transfert dans une presse de transfert ou machine-outil analogue travaillant le métal par formage
DE4237315A1 (de) * 1992-11-05 1994-05-11 Schuler Gmbh L Presse mit einer Umsetzeinrichtung für Blechteile

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1452769A1 (de) 1963-11-12 1969-05-29 Mueller Fritz Pressenfab Vorrichtung zum Foerdern von durch eine Presse zu bearbeitenden Werkstuecken
DE2632593A1 (de) 1975-07-22 1977-02-03 Aida Eng Ltd Dreidimensionale vorschubvorrichtung fuer eine stufenpresse
DE3213381A1 (de) 1982-04-10 1983-10-20 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Vorrichtung zum unterstuetzen der greiferschienen in einer transfer-presse
EP0384188A2 (fr) 1989-02-18 1990-08-29 SCHULER PRESSEN GmbH & Co. Dispositif de transfert dans une presse de transfert ou machine-outil analogue travaillant le métal par formage
DE4237315A1 (de) * 1992-11-05 1994-05-11 Schuler Gmbh L Presse mit einer Umsetzeinrichtung für Blechteile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972586A2 (fr) 1998-07-15 2000-01-19 Müller Weingarten AG Procédé pour la commande d' actionnement d'une presse de transfert pour grandes pièces et dispositif pour réaliser ce procédé

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