EP0399337B1 - Porte-outil multiple pour poinçons - Google Patents

Porte-outil multiple pour poinçons Download PDF

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Publication number
EP0399337B1
EP0399337B1 EP90109135A EP90109135A EP0399337B1 EP 0399337 B1 EP0399337 B1 EP 0399337B1 EP 90109135 A EP90109135 A EP 90109135A EP 90109135 A EP90109135 A EP 90109135A EP 0399337 B1 EP0399337 B1 EP 0399337B1
Authority
EP
European Patent Office
Prior art keywords
tool carrier
ram
punch
punches
multitool
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
EP90109135A
Other languages
German (de)
English (en)
Other versions
EP0399337A1 (fr
Inventor
Victor L. Chun
James R. Hunter
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.)
Murata Machinery Ltd
Original Assignee
Murata Machinery Ltd
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 Murata Machinery Ltd filed Critical Murata Machinery Ltd
Publication of EP0399337A1 publication Critical patent/EP0399337A1/fr
Application granted granted Critical
Publication of EP0399337B1 publication Critical patent/EP0399337B1/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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/12—Punching using rotatable carriers
    • 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
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/12—Punching using rotatable carriers
    • B21D28/125—Punching using rotatable carriers with multi-tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/028—Loading or unloading of dies, platens or press rams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/08—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with moulds carried by a turntable

Definitions

  • This invention concerns tool holders and, more particularly, holders for carrying punches in punch presses, particularly punch presses having rotary turrets carrying punches to enable automated punch changing.
  • punch presses having upper and lower turret plates respectively carrying a circumferential array of punches and mating dies able to be selectively indexed to a punch ram. This enables automated changing of punches and dies in the operation of the punch press.
  • the punches have also been mounted and driven to enable indexing about their own axis in order to change the orientation of the punch for a given punching operation.
  • An example of such indexed tool holder is described in US-A-4 412 469.
  • punch holders be able to generate sufficient stripping forces to insure reliable punching, i.e., to exert punch withdrawl forces after punch penetration of the workpiece has occurred.
  • WO-A1-88/09232 describes a multitool punch holder of the rotary indexing type according to the generic part of claim 1 in which a tool carrier cylinder is provided mounted in an axially fixed sleeve rotatable about its axis by an indexing drive.
  • the problem to be solved by the invention is to provide a multitool punch holder assembly with a multitool selection, but of a simple and reliable configuration, and at the same time generate adequate punch stripping forces.
  • the tool carrier is formed with a plurality of axial bores arranged about the carrier rotary axis, each bore adapted to slidably receive a punch stem rod, each having a punch at the lower end thereof.
  • Each punch stem is formed with a plunger portion protruding above the tool carrier and indexable beneath a protruberance formed on the punch ram so as to be selectively driven as the ram is reciprocated.
  • a stripper spring surrounding each punch stem resists advancing by the ram stroke, and acts as a stripping spring to withdraw the associated punch after workpiece penetration.
  • the ram is secured to the tool carrier by a head member telescoped into the tool carrier, axially movable therein against the resistance of a compression spring serving to maintain each punch stem rod below the ram drive feature during indexing of the tool holder.
  • a stripper plate is mounted to the lower face of the tool carrier, and engages the workpiece as the ram strokes to initiate driving of a selected stem and punch beneath the ram drive feature.
  • FIGURES 1 and 2 illustrate the multitool punch holder 10 according to a preferred form of the present invention, shown installed in the upper turret plate 12 of a rotary turret punch press.
  • the press ram 14 is formed with a tee slot 16 which received a tee shaped head 18 of a tee member 20 included in the holder assembly 10.
  • the tee member 20 is telescopically received into a cylindrical tool carrier 22 by a mounting rod 24 threaded at 25 into the lower end of tee member 20, having a head 26 seated against an endwall 28 in a bore 30 formed in the tool carrier 22 slidably receiving the mounting rod 24.
  • a return compression spring 32 encircles the mounting rod 24 and is seated against endwall 34 of the bore 36 slidably receiving the tee member 20. This urges the tool carrier 22 downwardly to be lowered away from the ram 14 prior to stroking of the ram, as shown in FIGURE 1.
  • the tool carrier 22 is mounted in an index sleeve 40 so as to be axially movable therein, but locked against relative rotation by a key 42 secured to the tool carrier 22 with a screw 44, and mating with a keyway slot 46 formed in the index sleeve 40.
  • the tool carrier 22 is formed with a series of twelve axial bores 48 spaced radially outward from the centerline of the tool carrier, in a circumferential array.
  • Each bore 48 is adapted to receive a punch stem rod 50, extending parallel to each other, having an upper plunger end 52 guided through a bronze bushing 54 and protruding above the upper end face of the tool carrier 22.
  • a retainer plate 56 is secured to the end face 56 with screws 58, keeps the punch stem rods 50 in position in the bores 48.
  • a stripper spring 62 encircles each punch stem rod 50, and is seated against a thrust washer 64 abutting a shoulder 66 in the lower section of bore 48 and shoulder 68 of the stem rod 50.
  • the stripper springs 62 also act against a thrust washer 70 beneath the bronze bushing 54. Downward movement of the stem rods 50 is resisted by compression of the stripper springs 62 by snap rings 60 acting on thrust washer 72 and bushing 54 and thrust washer 70.
  • the stem rods 50 each include a threaded section 74 received in a punch 76.
  • the stem rods 50 and punches 76 may be made one piece to reduce costs.
  • An antirotation dowel 78 maintains the orientation of the punch 76.
  • a urethane stripper end cap 80 is secured with capscrews 82 and dowels 84 to the lower end face 86 of the tool carrier with punch openings 88 alinged with each punch 76, preferably formed by the punches themselves in the initial cycle of operation.
  • the index sleeve 40 is rotatably received in a bushing sleeve 90 fixed in the upper turret plate 12 with capscrews 92.
  • the index sleeve 40 is restrained axially by means of a flange 94 resting on flange 96 of the bushing sleeve 90, but free to rotate.
  • the tool carrier 22 rotates with the index sleeve 40, but is axially movable therein.
  • a series of spring plunger assemblies 98 yieldably retains the tool carrier 22 axially within the index sleeve 40.
  • the index sleeve 40 is adapted to be rotationally driven to index each stem rod end 52 beneath an asymetric ram engagement feature 100 extending radially out from the main shape of the ram 14 to lie above a single stem rod end 52. This thereby enables selective punching by ram descending motion with a single selected punch 78 indexed to that position.
  • index drive arrangement 103 mating with a vee block drive feature 102 attached to the upper side of flange 94
  • index drive 103 could include a drive wedge axially movable on a plate to seat in the vee block drive feature 102, the drive wedge driven by a worm to enable rotation to index the tool carrier 22.
  • a "home" detent comprised of a spring plunger assembly 110 seats in a pocket 112 in the flange 96 of bushing 90.
  • the punch holder assembly 10 is located initially by seating of the spring plunger 110, which prevents unintended movement out of the home position even if a considerably delay occurs prior to the initial indexing cycle.
  • the turret plate 12 is rotated to engage the ram 14 with the head member 20.
  • the indexing drive is activated to bring a selected one of the stem rod 50 beneath the ram engagement feature 100.
  • the ram 16 is then stroked, causing tool carrier 22 to descend with the head member 20 until the stripper plate 80 engages the surface of a workpiece.
  • the head member 20 continues to descend with the ram, telescoping by sliding into the bore 36 against the resistance of compression spring 32.
  • the ram feature 100 descends to engage the protruding end 52 of the stem rod 50 located therebelow. This causes the attached punch 76 to be driven through the workpiece against the resistance of the encircling stripper spring 62.
  • the stripper spring 62 forces the stem rod 50 upward to withdraw the attached punch 76 from the workpiece.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)

Claims (4)

  1. Porte-poinçon multi-outils (10) pour une presse de découpage présentant une structure de support de poinçon, qui comporte une plaque (12) de tourelle rotative et un vérin (14) mobile verticalement, en vue d'entraîner un poinçon (76) sélectionné, ledit porte-poinçon comportant un porte-outils (22) monté dans ladite plaque (12) de tourelle rotative, à rotation autour d'un axe, un moyen accouplant ledit porte-outils (22) audit vérin (14) en vue d'un entraînement, et comportant un élément de tête (20) présentant une partie (18) coopérant avec ledit vérin (14) et logée à coulissement dans un alésage (36) dudit porte-outils (22), ledit porte-outils (22) présentant une distribution circonférentielle d'alésages (48) s'étendant axialement, distribués autour dudit axe de rotation dudit porte-outils (22), et une pluralité de poinçons (76) montés chacun dans un alésage de la pluralité d'alésages (48) dudit porte-outils (22); la rotation dudit porte-outils (22) dans ladite plaque (12) de tourelle rotative permettant de placer chacun desdits poinçons (76) dans une position active déterminée par la position en rotation dudit porte-outils (22) dans ladite plaque (12) de tourelle rotative, lesdits moyens (20, 32) accouplant ledit porte-outils (22) et ledit vérin (14) comportant des moyens fournissant un déplacement de descente limité dudit porte-outils (22) et des poinçons (76) qui sont portés dans celui-ci, ensemble avec le vérin (14), et un moyen (100) pour entraîner un seul desdits poinçons (76) se trouvant dans ladite position active, par la poursuite de la descente dudit vérin (14), caractérisé en ce que, en utilisation, ledit déplacement dudit porte-outils (22) est arrêté par contact avec une pièce d'oeuvre, après une longueur prédéterminée du parcours de descente dudit vérin (14), et ledit moyen accouplant ledit vérin (14) audit porte-outils (22) permettant la poursuite de la descente dudit vérin (14), après l'arrêt du déplacement dudit porte-outils (22), chacun desdits poinçons (76) étant formé d'un barreau (50) de tige de poinçon repoussé vers le haut par un ressort de dégagement (62) qui l'entoure, et présentant une extrémité supérieure (52) débordant au-dessus dudit porte-outils (22), ledit vérin (14) étant configuré avec un élément radial (100) aligné sur ledit poinçon (76) unique sélectionné, lorsque ledit porte-outils (22) se trouve dans une position de fonctionnement donnée dans ladite plaque de tourelle (12), et un ressort (32) agissant entre ledit élément de tête (20) et ledit porte-outils (22), en s'opposant à un mouvement axial relatif entre eux.
  2. Porte-poinçon multi-outils (10) pour une presse de découpage selon la revendication 1, comportant en outre une plaque de séparation (80) fixée à la face inférieure dudit porte-outils (22) et adaptée pour entrer en contact avec ladite pièce d'oeuvre lors de la course vers le bas dudit vérin (14).
  3. Porte-poinçon multi-outils (10) pour une presse de découpage selon la revendication 1 ou 2, comportant en outre un manchon (40) de repérage, monté à rotation dans ladite structure porte-poinçons (12) de ladite presse de découpage, mais empêché de s'y déplacer axialement, ledit porte-outils (22) étant mobile axialement dans ledit manchon (40) de repérage, mais étant solidaire de celui-ci en rotation; et comportant en outre des moyens d'entraînement (102, 103) en vue de faire tourner ledit manchon (40) de repérage.
  4. Porte-poinçon multi-outils (10) pour une presse de découpage selon la revendication 3, comportant en outre un moyen plongeur (98) à ressort, limitant de manière élastique un déplacement axial dudit porte-outils (22) dans ledit manchon (40) de repérage.
EP90109135A 1989-05-22 1990-05-15 Porte-outil multiple pour poinçons Expired - Lifetime EP0399337B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US35525289A 1989-05-22 1989-05-22
US355252 1989-05-22

Publications (2)

Publication Number Publication Date
EP0399337A1 EP0399337A1 (fr) 1990-11-28
EP0399337B1 true EP0399337B1 (fr) 1994-08-10

Family

ID=23396783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90109135A Expired - Lifetime EP0399337B1 (fr) 1989-05-22 1990-05-15 Porte-outil multiple pour poinçons

Country Status (4)

Country Link
EP (1) EP0399337B1 (fr)
JP (1) JP2720576B2 (fr)
CA (1) CA2016724C (fr)
DE (1) DE69011411T2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7326008B2 (en) * 2004-12-10 2008-02-05 Danly Iem, Llc Servo tapping unit with built in shock protection
CN102806280B (zh) * 2012-08-20 2015-05-06 福建先海电气设备有限公司 一种数控转塔冲床
CN106573287B (zh) * 2014-08-12 2019-12-06 帕斯斯坦兹特奇尼克股份有限公司 复式工具
DE102015219416B3 (de) 2015-10-07 2017-03-02 Pass Stanztechnik Ag Mehrfachwerkzeug für eine Stanzvorrichtung und Stanzvorrichtung mit einem entsprechenden Mehrfachwerkzeug

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3241046A1 (de) * 1982-11-06 1984-05-10 Trumpf GmbH & Co, 7257 Ditzingen Stanzmaschine, deren stanzstempel als mehrfachstempel ausgebildet ist
GB8712222D0 (en) * 1987-05-22 1987-06-24 Tower Machine Tools Ltd Multi-tool indexing station
DE3720777C2 (de) * 1987-06-24 1993-10-07 Behrens Ag C Revolverschneidpresse

Also Published As

Publication number Publication date
JPH0390225A (ja) 1991-04-16
DE69011411T2 (de) 1995-03-30
JP2720576B2 (ja) 1998-03-04
CA2016724A1 (fr) 1990-11-22
DE69011411D1 (de) 1994-09-15
CA2016724C (fr) 1999-04-27
EP0399337A1 (fr) 1990-11-28

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