EP0251796B1 - Poinçons et presses - Google Patents

Poinçons et presses Download PDF

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Publication number
EP0251796B1
EP0251796B1 EP19870305861 EP87305861A EP0251796B1 EP 0251796 B1 EP0251796 B1 EP 0251796B1 EP 19870305861 EP19870305861 EP 19870305861 EP 87305861 A EP87305861 A EP 87305861A EP 0251796 B1 EP0251796 B1 EP 0251796B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
piston
punch
piston arrangement
assembly
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
Application number
EP19870305861
Other languages
German (de)
English (en)
Other versions
EP0251796A2 (fr
EP0251796A3 (en
Inventor
Rodney Linval
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.)
LINVAL, RODNEY
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0251796A2 publication Critical patent/EP0251796A2/fr
Publication of EP0251796A3 publication Critical patent/EP0251796A3/en
Application granted granted Critical
Publication of EP0251796B1 publication Critical patent/EP0251796B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/007—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen using a fluid connection between the drive means and the press ram
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/32—Perforating, i.e. punching holes in other articles of special shape

Definitions

  • the present invention relates to punches and presses and especially, but not exclusively, to punches for piercing, forming or trimming apertures in sheet metal or other material.
  • the invention is concerned also with auxiliary presses where a moving tool, normally shaped, is moved towards a fixed tool to shape a sheet metal member therebetween. Effectively the difference between punches and auxiliary presses is that the punch pierces the workpiece while the press does not.
  • punches and presses will be referred to as punches.
  • a known system comprises one or more punches which are fixed to a lower non-movable member of a press or press tool and are operated by lowering an upper member of the press or press tool, the sheet material to be punched being placed on the bed of the press.
  • a problem with this system is that the holes may only be punched at a defined angle (normally at right angles) with respect to the workpiece. Where the workpiece is non-planar it often has to be subjected to several operations to achieve apertures in desired positions.
  • a punch assembly adapted for mounting on a press tool including a first piston arrangement adapted to carry a punch for forming a workpiece on said tool and mounted in a first cylinder, a second piston arrangement mounted in a second cylinder, fluid connection means between said first and second cylinders and mounting means for said assembly adapted for mounting said assembly on the press tool with the second piston arrangement in the path of travel of a movable member of the press tool, whereby on movement of said member said second piston arrangement is moved into its cylinder to compress fluid therein and said first piston arrangement is moved out of its cylinder by said fluid, characterised in that the said first piston is attached to a guiding member external of the cylinder and received in a guide bore in the mounting means, the punch being mounted, in use, on the guiding member.
  • a press tool for shaping sheet metal having a profiled fixed member on which the workpiece to be shaped is supportable and a correspondingly shaped member movable towards said fixed member to shape the workpiece and including also a punch assembly for further forming the workpiece by deforming it in a direction angularly displaced from the direction of movement of said movable member, said punch assembly including a first piston arrangement mounted in a first cylinder, a second piston arrangement mounted in a second cylinder, fluid connection means between said first and second cylinders and mounting means adapted for mounting said assembly on said fixed member of the pressing tool with the second piston arrangement in the path of travel of the movable member whereby movement of the movable member causes movement of said second piston arrangement into its cylinder and corresponding movement of the first piston out of its cylinder to cause said further forming of the workpiece, characterised in that the said first piston is attached to a guiding member external of the cylinder and received in a guide bore in the mounting means, the punch being mounted, in use
  • a punch assembly is illustrated in Fig. 1 and comprises a first piston arrangement 10 and a second piston arrangement 20.
  • the first piston arrangement comprises a piston 11 and seal 12 and a piston rod 14 attached to a punch mounting member 16.
  • the piston is spring urged by a return spring 18 into the position as shown.
  • the second piston arrangement 20 comprises an operating plunger or piston 21 with a seal 22 which is operated by a force applied in the direction of arrow 24.
  • the piston 21 is movable in a cylinder 28 arranged substantially at right angles in the same block 13 as the cylinder 15 in which piston 11 is movable.
  • the piston arrangement 20 is driven in operation into the cylinder 28 by a member (not shown) of a press on which the punch assembly is mounted and therefore the speed at which the piston travels is determined by the operating speed of the press.
  • the punch mounting member 16 attached to the end of piston rod 14 by a screw 34 is adapted to mount any commercial headed or ball lock punch retainer (not shown).
  • a hydraulic line may be connected to an inlet 50 (shown blocked off in the embodiment of Fig. 1).
  • the line is connected to a cylinder 28 in a block (not shown) mounted on the press remote from the block housing piston arrangement 10. It will be realised therefore that one piston arrangement 20 can drive several piston arrangement 10.
  • Fig. 1 the piston arrangements 10, 20 are at right angles to each other thereby allowing a vertical operating press to punch holes in a horizontal direction.
  • Figs. 2 and 3 show punch assemblies 102 and 103 in which the first and second piston arrangements 10, 20 may be set at different angles.
  • angle A between the direction of applied force 24 and punch movement 25 is acute ( ⁇ 90°) and in Fig. 3 angle A is obtuse (> 90°).
  • the punch assembly of the invention is therefore extremely versatile being adjustable both in speed, in the angle of punching and in the travel of the punch per unit travelled by the press.
  • a complex shaped channel section 60 is shown with two major front faces 62, 64. Face 62 is inclined at an angle forward of the vertical and face 64 rearward of the vertical.
  • Both faces can be punches perpendicularly to the face.
  • the punch assemblies 102, 103 etc may be operated directly by the upper movable member 66 of a press or may as illustrated, be connected by hydraulic lines 102', 103' to a separate block 52 carrying a piston arrangement 20.
  • the spring 18 is replaced by an air or gas spring.

Landscapes

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

Claims (9)

  1. Ensemble de montage de poinçon prévu pour être monté sur un outillage de presse, comprenant un premier dispositif à piston (10) prévu pour supporter un poinçon de formage d'une pièce sur ledit outillage et monté dans un premier cylindre (15), un second dispositif à piston (20) monté dons un second cylindre (28), des moyens de raccordement pour le passage d'un fluide (30) entre le premier et le second cylindres (15,28) et des moyens de montage (13) pour ledit ensemble, prévus pour le montage de cet ensemble sur l'outillage de presse avec le second dispositif à piston (20) situé sur la trajectoire d'une partie mobile de l'outillage de presse, grâce à quoi lors d'un mouvement de ladite partie le second dispositif à piston (20) est déplacé vers l'intérieur de son cylindre de manière à comprimer le fluide qui s'y trouve et le premier dispositif à piston (10) est déplacé ver l'extérieur de son cylindre (15) par ledit fluide, caractérisé en ce que le premier piston (10) est fixé à un organe de guidage situé à l'extérieur du cylindre (15) et logé dans un alésage de guidage ménagé dans les moyens de montage (13), le poinçon étant, en cours d'utilisation, monté sur l'organe de guidage.
  2. Ensemble de montage de poinçon selon la revendication 1, caractérisé en ce qu'un ressort de rappel (18) est prévu à l'intérieur du premier cylindre (15) pour pousser le premier dispositif à piston (10) vers l'intérieur de ce cylindre.
  3. Ensemble de montage de poinçon selon la revendication 1 ou 2, caractérisé en ce que les premier et second cylindres (15,28) sont formés dans le même bloc de cylindres (13).
  4. Ensemble de montage de poinçon selon l'une quelconque des revendications précédentes, caractérisé en ce que les axes des premier et second cylindres (15,28) sont perpendiculaires l'un à l'autre.
  5. Ensemble de montage de poinçon selon l'une quelconque des revendications précédentes, caractérisé en ce que les diamètres des premier et second cylindres (15,28) sont inégaux.
  6. Outillage de presse pour le formage de tôles métalliques, comportant une partie fixe sur laquelle la pièce à former peut être supportée et une partie mobile de conformation correspondante, déplaçable en direction de ladite partie fixe pour le formage de la pièce et comprenant aussi un ensemble de montage de poinçon prévu pour un formage supplémentaire de la pièce pour déformation de celle-ci dans une direction décalée angulairement par rapport à la direction de déplacement de ladite partie mobile, l'ensemble de montage de poinçon comprenant un premier dispositif à piston (10) monté dans un premier cylindre (15), un second dispositif a piston (20) monté dans un second cylindre (28), des moyens de raccordement pour le passage d'un fluide (30) entre le premier et le second cylindres (15,28) et des moyens de montage (13) prévus pour le montage dudit ensemble sur la partie fixe de l'outillage de presse, le second dispositif à piston (20) étant situé sur la trajectoire de la partie mobile, grâce à quoi un mouvement de cette partie mobile provoque un mouvement du second dispositif à piston (20) vers l'intérieur de son cylindre (28) et un mouvement correspondant du premier piston (10) vers l'extérieur de son cylindre (15) pour provoquer le formage supplémentaire de la pièce, caractérisé on ce que le premier piston (10) est fixé à un organe de guidage situé à l'extérieur du cylindre et logé dans un alésage de guidage ménagé dans les moyens de montage (13), le poinçon étant, en cours d'utilisation, monté sur l'organe de guidage.
  7. Outillage de presse selon la revendication 6, caractérise en ce que l'axe longitudinal du premier cylindre (15) est perpendiculaire à l'axe longitudinal du second cylindre (28).
  8. Outillage de presse selon la revendication 6 ou 7, caractérisé en ce que les premier et second cylindres (15,28) sont formés dans le même bloc (13).
  9. Outillage de presse selon la revendication 6, caractérisé en ce qu'est prévue une pluralité de premiers dispositifs à piston (15) et de premiers cylindres (10), reliés par des lignes hydrauliques à un seul ensemble formé du second piston et du second cylindre.
EP19870305861 1986-06-27 1987-07-02 Poinçons et presses Expired EP0251796B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868615709A GB8615709D0 (en) 1986-06-27 1986-06-27 Punches
GB8615709 1986-06-27

Publications (3)

Publication Number Publication Date
EP0251796A2 EP0251796A2 (fr) 1988-01-07
EP0251796A3 EP0251796A3 (en) 1988-11-30
EP0251796B1 true EP0251796B1 (fr) 1992-04-29

Family

ID=10600189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870305861 Expired EP0251796B1 (fr) 1986-06-27 1987-07-02 Poinçons et presses

Country Status (3)

Country Link
EP (1) EP0251796B1 (fr)
DE (1) DE3778592D1 (fr)
GB (1) GB8615709D0 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2654037B1 (fr) * 1989-11-07 1994-08-05 Renault Outillage de presse avec dispositif hydraulique de commande de coulisseau.
EP0696960B1 (fr) * 1993-04-26 1997-03-26 Danly Corporation Module porte-outils entraine par une presse, notamment unite de decoupage transversal ou de pliage entrainee par une presse
EP0833061B1 (fr) * 1996-09-26 2001-11-14 Simone Bordignon Presse hydraulique avec compensation d'huile automatique
DE19830825B4 (de) * 1998-07-09 2006-10-12 Schnupp Gmbh & Co Hydraulik Kg Umformwerkzeug
KR100391453B1 (ko) * 2000-12-30 2003-07-12 현대자동차주식회사 프레스용 피어싱 장치
KR101072305B1 (ko) 2005-07-15 2011-10-11 현대자동차주식회사 피어싱 프레스
GB2464756B (en) * 2008-10-28 2013-06-05 Linval Rodney Improvements in or relating to punches or presses
JP6197766B2 (ja) * 2014-08-26 2017-09-20 Ｊｆｅスチール株式会社 プレス成形用金型装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2112153A (en) * 1936-05-25 1938-03-22 Midwest Production Engineering Hydraulic punch and die unit
DE1919095C3 (de) * 1969-04-15 1974-03-21 Gabriel, Guenther, 8035 Gauting Hydropneumatische Kolben-Zylinder-Einheit zum Ausüben von Kräften auf Werkstücke
FR2348051A1 (fr) * 1976-04-12 1977-11-10 Polymatic Sa Poinconneuse d'angle hydraulique

Also Published As

Publication number Publication date
EP0251796A2 (fr) 1988-01-07
GB8615709D0 (en) 1986-08-06
EP0251796A3 (en) 1988-11-30
DE3778592D1 (de) 1992-06-04

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