EP0644002B1 - Outil supérieur pour presse plieuse - Google Patents

Outil supérieur pour presse plieuse Download PDF

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Publication number
EP0644002B1
EP0644002B1 EP94118710A EP94118710A EP0644002B1 EP 0644002 B1 EP0644002 B1 EP 0644002B1 EP 94118710 A EP94118710 A EP 94118710A EP 94118710 A EP94118710 A EP 94118710A EP 0644002 B1 EP0644002 B1 EP 0644002B1
Authority
EP
European Patent Office
Prior art keywords
tool
upper tool
pressing
fixing member
press brake
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
EP94118710A
Other languages
German (de)
English (en)
Other versions
EP0644002A3 (fr
EP0644002A2 (fr
Inventor
Susamu Kawano
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.)
Amada Metrecs Co Ltd
Original Assignee
Amada Metrecs Co 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
Priority claimed from JP4133511A external-priority patent/JP2500247B2/ja
Priority claimed from JP4331318A external-priority patent/JPH0813379B2/ja
Application filed by Amada Metrecs Co Ltd filed Critical Amada Metrecs Co Ltd
Publication of EP0644002A2 publication Critical patent/EP0644002A2/fr
Publication of EP0644002A3 publication Critical patent/EP0644002A3/fr
Application granted granted Critical
Publication of EP0644002B1 publication Critical patent/EP0644002B1/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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • B21D5/0236—Tool clamping

Definitions

  • the present invention relates to an upper tool for a press brake, said upper tool comprising a shank adapted to be clamped to a holder body by a clamping forced of a pressing-down and fixing member, wherein the shank has a clamp surface for engagement with the pressing-down and fixing member.
  • Such a tool for a press brake is previously known from EP-A-0 387 121.
  • the tool to be introduced into a clamp needs to be rotated to be engaged with a lever, which co-operates with a spring actuated cam.
  • a spring is released so as to urge the lever and to turn into a position where the tool and press brake are ready for operation.
  • a press brake is provided with an upper table (referred to as an upper apron, sometimes) and a lower cable (referred to as a lower apron, sometimes) arranged in such a way as to be opposed to each other, and either of the upper or lower cable is disposed movably in the vertical direction.
  • an upper table referred to as an upper apron, sometimes
  • a lower cable referred to as a lower apron, sometimes
  • an upper tool is mounted on the lower part of the upper cable, and a lower tool is mounted on the upper part of the lower cable. Therefore, when the movable side table is moved up and down so that the upper and lower cools can be engaged with each other, a workpiece positioned between the upper and lower tools is to be bent.
  • a number of upper tool holders are mounted on the lower part of the upper table to exchange the upper tool with an appropriate one according to the bending shape of the workpiece.
  • the upper tools are supported by a number of upper holders so as to be exchanged.
  • the structure is such that an upper-tool pressing-down and fixing member is mounted on a holder body attached to the lower part of the upper table, and the upper-tool pressing-down and fixing member is fastened with fastening bolts to tightly fasten and fix the upper part of the upper tool between the holder body and the upper tool clamp.
  • An upper tool according to a preferred embodiment of the present invention is generally indicated by the reference numeral 9.
  • the upper tool 9 exchangeably mounted on the upper holding device 1 as described later on is formed with a wedge portion 9W having a contact surface 9F brought into contact with a lower end surface 7E of a support plate 7, a sliding surface 9S brought into slidable contact with a front surface 7F of the support plate 7, and a clamp surface 9C brought into tight contact with a push member 33 of an upper-tool pressing-down and fixing member 11.
  • the wedge portion 9W is so formed as to provide a thin walled portion in an upward direction by forming the clamp surface 9C as an inclined surface. Further, the wedge portion 9W is formed with a projection portion 9P engageable with the pressing-down and fixing section 11C of the upper-tool pressing-down and fixing member 11.
  • the upper tool 9 is formed with a lower end work processing portion 9M for bending a workpiece W in co-operation with a lower tool 59 mounted on a lower table 57 of the press brake.
  • the upper holding device includes a holder body 5 removably mounted on the lower part of an upper table 3 of a press brake (not shown); the support plate 7 formed integral with the lower part of the holder body 5; the upper-tool pressing-down and fixing member 11 for pressing-down and fixing the upper tool 9 between the upper-tool pressing-down and fixing member 11 and the support plate 7; a clamping-force producing device 13 for producing the clamping force of the upper-tool pressing-down and fixing member 11, and a clamp releasing device 15 for releasing the upper tool 9 from the upper-tool pressing-own and fixing member 11.
  • the holder body 5 is formed with an upper block portion 5B having a hick wall in the front and rear direction (in the right and left direction in Fig. 2).
  • the support plate 7 is formed integral with the lower part of the upper block portion 5B.
  • a mounting plate 19 projecting upward is mounted with the use of a plurality of bolts 17 (see Fig. 1).
  • the holder body 5 can be mounted on the upper table 3 by bringing the mounting plate 19 into contact with the front lower portion of the upper table 3 and by fastening a clamp jaw 23 with the use of fastening bolts 21 screwed into the upper table 3.
  • a wedge member 25 is interposed between the upper surface of the holder body 5 and the upper table 3 to adjust the vertical position of the holder body 5.
  • the upper-tool pressing-down and fixing member 11 is formed with a plate-shaped member having a width roughly the same as that of the holder body 5 in the right and left direction in Fig. 1, and pivotally supported by the holder body 5 so as to fix the upper tool 9 in cooperation with the support plate 7.
  • the upper-tool pressing-down and fixing member 11 is formed with through holes 11H at roughly the middle portion (in the vertical direction) thereof (see Fig. 2), and pivotally supported by a plurality of mounting bolts 27 passed through the through holes 27H and screwed in the horizontal direction into the support plate 7.
  • a spherical washer 29 is interposed between a head portion 27H of each of the mounting bolts 27 and the upper-tool pressing-down and fixing member 11.
  • a weak coil spring 31 is elastically disposed between the upper-tool pressing-down and fixing member 11 and the support plate 7 so that the two members 11 and 7 are urged to be away form each other.
  • two pressing-down and fixing sections 11C are projectingly formed to press the upper tool 9 against the support plate 7 for clamping the upper tool 9.
  • a push member 33 for pressing the upper tool 9 is mounted on the pressing-down and fixing section 11C with a bolt 35.
  • the clamp releasing device 15 is provided on the upper portion of the upper-tool pressing-down and fixing member 11 to release the upper tool 9 clamped by the pressing-down and fixing section 11C of the upper-tool pressing-down and fixing member 11.
  • the clamp releasing device 15 includes a fastening screw 37 screwed into the upper portion of the upper-tool pressing-down and fixing member 11, and a lever 39 is attached to this fastening screw 37.
  • the clamping-force producing device 13 includes an adjust screw 45 engaged with a nut member 43 for relative positional adjustment, a ring member 47 fitted to the adjust screw 45 so as to be movable in the axial direction, a strong elastic member 49 (a coil spring or a disk spring or urethane rubber) elastically interposed between the head portion 45H of the adjust screw 45 and the ring member 47, as shown in Fig. 2.
  • the clamping-force producing device 13 is disposed in a horizontal inner hollow portion 5H formed in the upper block portion 5B of the holder body 5.
  • a contact member 51 in contact with the front end portion of the fastening screw 37 is formed integral with the ring member 47.
  • a head portion 45H of the adjust screw 45 is in contact with the side wall of the hollow portion 5H.
  • a plurality of small piece members 53 are attached to the holder body 5 with bolts 55 so as to be brought into contact with the upper surface of the upper-tool pressing-down and fixing member 11, in order to guide the pivotal motion of the upper-tool pressing-down and fixing member 11 and further to restrict the upward movement of the upper-tool pressing-down and fixing member 11. Accordingly, the upper-tool pressing-down and fixing member 11 can press down and fix the upper tool 9 without moving in the vertical direction.
  • the upper tool 9 is mounted on the upper tool holding device 1 in accordance with the following procedure:
  • the lever 39 of the clamp releasing device 15 is pivoted in the clockwise direction to hold the fastening screw 37 in the fastened condition. Even under the condition that the fastening screw 37 is fastened as described above, the push member 33 formed at the lower portion of the upper-tool pressing-down and fixing member 11 is kept away from the support plate 7.
  • the movable side of the upper or lower table 3 or 57 is moved up and down to engage the upper tool 9 with the lower tool 59, with the result that the upper tool 9 is moved upward relative to the holder body 5.
  • the upper tool 9 can be removed from the upper tool holding device 1 as follows:
  • the lever 39 of the clamp releasing device 15 is pivoted in the counterclockwise direction to loosen the fastening force of the fastening screw 37, so that the upper tool 9 is released from the upper-tool pressing-down and fixing member 11.
  • the projection 9P of the wedge portion 9W of the upper tool 9 is engaged with the clamp portion 11C of the upper-tool pressing-down and fixing member 11, so that it is possible to prevent the upper tool 9 from being dropped.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Claims (7)

  1. Outil supérieur (9) pour une plieuse, ledit outil supérieur comportant une tige prévue pour être serrée sur un corps de support (5) par une force de serrage d'un élément d'appui et de fixation (11),
    ladite tige ayant une surface de serrage (9C) pour engagement avec l'élément d'appui et de fixation (11),
    caractérisé en ce que
    la surface de serrage (9C) est inclinée d'une manière telle que la tige devient plus étroite en direction de son extrémité dirigée vers le corps de support (5).
  2. Outil supérieur selon la revendication 1, caractérisé en ce que ladite surface de serrage inclinée (9C) se termine par une saillie d'extrémité supérieure (9P) à l'extrémité supérieure de ladite tige (9W).
  3. Outil supérieur selon la revendication 1 ou 2, caractérisé en ce que ladite tige (9W) comporte en outre une surface de glissement (9S) opposée à ladite surface de serrage (9C) qui est inclinée par rapport à ladite surface de glissement (9S).
  4. Outil supérieur selon l'une des revendications 1 à 3, caractérisé par une partie de travail (9M) destinée à traiter une pièce (W) en coopération avec un outil inférieur (59), ladite partie de travail (9M) étant prévue à l'extrémité inférieure dudit outil.
  5. Outil supérieur selon l'une des revendications 1 à 4 en combinaison avec une plieuse, ladite plieuse ayant un corps de support (5) et un élément d'appui et de fixation (11) d'un dispositif de support d'outil supérieur (1) qui doit être monté sur une table supérieure (3) de la plieuse, caractérisé en ce que la tige (9W) a une surface de contact (9F) devant être amenée en contact avec une surface inférieure (7E) d'une plaque de support (7) prévue sur le corps de support (5), et en ce que la surface de glissement (9) est prévue pour être amenée en contact de glissement avec une surface verticale de ladite plaque de support (7), et en ce que la surface de serrage (9C) est prévue pour être amenée en contact de pression avec une section d'appui et de fixation (11C) dudit élément d'appui et de fixation d'outil supérieur (11).
  6. Combinaison d'un outil supérieur et d'une plieuse selon la revendication 5, caractérisée en ce que la saillie d'extrémité supérieure (9P) peut engager ladite section d'appui et de fixation (11C).
  7. Combinaison d'un outil supérieur et d'une plieuse selon la revendication 5 ou 6, caractérisée en ce que la longueur verticale de ladite surface de serrage (9C) est plus grande qu'un espace entre la surface inférieure (7E) du corps de support (5) et ladite surface de contact (9F) formant une partie d'épaulement dudit outil supérieur (9) lorsque la saillie d'extrémité supérieure (9P) engage l'élément d'appui et de fixation (11).
EP94118710A 1992-05-15 1993-05-07 Outil supérieur pour presse plieuse Expired - Lifetime EP0644002B1 (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP123183/92 1992-05-15
JP12318392 1992-05-15
JP4133511A JP2500247B2 (ja) 1992-05-26 1992-05-26 プレスブレ―キ用上型
JP133511/92 1992-05-26
JP331318/92 1992-12-11
JP4331318A JPH0813379B2 (ja) 1992-05-15 1992-12-11 プレスブレーキ用金型ホルダ
EP93107463A EP0569880B1 (fr) 1992-05-15 1993-05-07 Support d'outil supérieur pour une presse

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP93107463.7 Division 1993-05-07
EP93107463A Division EP0569880B1 (fr) 1992-05-15 1993-05-07 Support d'outil supérieur pour une presse

Publications (3)

Publication Number Publication Date
EP0644002A2 EP0644002A2 (fr) 1995-03-22
EP0644002A3 EP0644002A3 (fr) 1995-10-18
EP0644002B1 true EP0644002B1 (fr) 1999-03-10

Family

ID=27314657

Family Applications (2)

Application Number Title Priority Date Filing Date
EP93107463A Expired - Lifetime EP0569880B1 (fr) 1992-05-15 1993-05-07 Support d'outil supérieur pour une presse
EP94118710A Expired - Lifetime EP0644002B1 (fr) 1992-05-15 1993-05-07 Outil supérieur pour presse plieuse

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP93107463A Expired - Lifetime EP0569880B1 (fr) 1992-05-15 1993-05-07 Support d'outil supérieur pour une presse

Country Status (2)

Country Link
EP (2) EP0569880B1 (fr)
DE (2) DE69316263T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7296457B2 (en) 2004-06-25 2007-11-20 Wilson Tool International Inc. Thermally-actuated press brake tool holder technology

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5619885A (en) * 1992-05-15 1997-04-15 Amada Metrecs Company, Limited Upper tool holder apparatus for press brake and method of holding the upper tool
US5513514A (en) * 1994-05-06 1996-05-07 Amada Metrecs Company, Limited Upper tool and upper tool holding device for press brake
US5507170A (en) * 1993-05-18 1996-04-16 Amada Metrecs Company, Limited Upper tool for press brake
TW249765B (fr) * 1993-05-18 1995-06-21 Amatamedory Kk
JP3004597U (ja) * 1993-05-18 1994-11-22 株式会社アマダメトレックス プレスブレーキ用上型
US5685191A (en) * 1994-05-06 1997-11-11 Amada Metrecs Company, Limited Upper tool for press brake
TW365857U (en) * 1994-05-17 1999-08-01 Amada Metrecs Co Upper tool and upper tool holder apparatus for press brake
JP2921741B2 (ja) * 1995-10-02 1999-07-19 株式会社アマダメトレックス プレスブレーキにおける上型ホルダ装置
NL1004266C1 (nl) * 1996-10-14 1998-04-15 Cornelis Hendricus Liet Gereedschaphouder voor het uit een aantal delen bestaande klemgereedschap van een zet- of vouwbank of dergelijke, alsmede zet- of vouwbank of dergelijke voorzien van een dergelijke gereedschaphouder.
US6003360A (en) * 1997-07-01 1999-12-21 Wilson Tool International, Inc. Press brake tool holder
US6450004B1 (en) 2001-10-09 2002-09-17 Douglas E. Edmondson Press brake punch holder
US7721586B2 (en) 2005-02-08 2010-05-25 Wilson Tool International Inc. Press brake tool seating technology
US7308817B2 (en) 2005-02-08 2007-12-18 Wilson Tool International Inc. Push plate tool holder for press brakes
US7596983B2 (en) 2005-07-11 2009-10-06 Wilson Tool International Inc. Press brake clamp incorporating tool-seating mechanism
CN101417303B (zh) * 2008-12-01 2010-11-10 米路加（深圳）科技发展有限公司 一种模具夹具
CN108067543B (zh) * 2017-11-23 2019-08-20 马鞍山市国菱机械刃模有限公司 一种夹持效果好的上模固定装置
US20220080486A1 (en) * 2018-12-31 2022-03-17 Durmazlar Makina Sanayi Ve Ticaret Anonim Sirketi An auxiliary bending tool for bending machines
CN115213263B (zh) * 2022-09-20 2022-12-13 烟台精锐模具有限公司 一种可微调的打印机内弹片冲压机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE749638C (de) * 1939-09-22 1944-11-28 Schnitt- und Biegewerkzeug mit Saeulenfuehrungsgestell und auswechselbaren Schnitt- und Biegeelementen
DE3136440A1 (de) * 1981-09-14 1983-03-31 Paul Weinbrenner Maschinenbau GmbH + Co KG, 7252 Weil der Stadt Spannvorrichtung zum spannen von werkzeugen
JPH0716713B2 (ja) * 1986-05-14 1995-03-01 株式会社アマダ 曲げ加工機の金型クランプ装置
FR2598946A1 (fr) * 1986-05-20 1987-11-27 Promecan Sisson Lehmann Dispositif de fixation d'un poincon ou d'une matrice sur un tablier d'une presse plieuse
FR2609909A1 (fr) * 1987-01-28 1988-07-29 Norlander Goran Dispositif serre-outil pour presse plieuse
FR2643838B1 (fr) * 1989-03-02 1991-05-31 Treillet Jean Dispositif de fixation rigide pour des pieces suspendues telles que poincons de presse-plieuse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7296457B2 (en) 2004-06-25 2007-11-20 Wilson Tool International Inc. Thermally-actuated press brake tool holder technology

Also Published As

Publication number Publication date
EP0644002A3 (fr) 1995-10-18
EP0569880A2 (fr) 1993-11-18
EP0569880A3 (fr) 1994-01-12
DE69316263D1 (de) 1998-02-19
DE69316263T2 (de) 1998-04-30
EP0569880B1 (fr) 1998-01-14
DE69323876T2 (de) 1999-07-01
EP0644002A2 (fr) 1995-03-22
DE69323876D1 (de) 1999-04-15

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