EP0569880B1 - Oberwerkzeugträger für eine Presse - Google Patents

Oberwerkzeugträger für eine Presse Download PDF

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Publication number
EP0569880B1
EP0569880B1 EP93107463A EP93107463A EP0569880B1 EP 0569880 B1 EP0569880 B1 EP 0569880B1 EP 93107463 A EP93107463 A EP 93107463A EP 93107463 A EP93107463 A EP 93107463A EP 0569880 B1 EP0569880 B1 EP 0569880B1
Authority
EP
European Patent Office
Prior art keywords
tool
pressing
fixing member
holder body
clamping force
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
EP93107463A
Other languages
English (en)
French (fr)
Other versions
EP0569880A3 (de
EP0569880A2 (de
Inventor
Susumu 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
Priority to EP94118710A priority Critical patent/EP0644002B1/de
Publication of EP0569880A2 publication Critical patent/EP0569880A2/de
Publication of EP0569880A3 publication Critical patent/EP0569880A3/xx
Application granted granted Critical
Publication of EP0569880B1 publication Critical patent/EP0569880B1/de
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 holding device for a press brake, according to the preamble of claim 1 and as disclosed in FR-A-2 609 909.
  • a press brake is provided with an upper table (referred to as an upper apron, sometimes) and a lower table (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 table is disposed movably in the vertical direction.
  • an upper table referred to as an upper apron, sometimes
  • a lower table referred to as a lower apron, sometimes
  • an upper tool is mounted on the lower part of the upper table, and a lower tool is mounted on the upper part of the lower table. Therefore, when the movable side table is moved up and down so that the upper and lower tools 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 holding device for a press brake by which an upper tool can be easily exchanged and which can prevent the upper tool from being dropped when the tool is mounted in the holder before being finally clamped or when the upper tool is released.
  • the upper holding device related to the first embodiment includes a holder body 5 removably mounted on the lower part of an upper table 3 of a press brake (not shown); a support plate 7 formed integral with the lower part of the holder body 5; an upper-tool pressing-down and fixing member 11 for pressing-down and fixing an 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-down and fixing member 11.
  • the holder body 5 is formed with an upper block portion 5B having a thick 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 exchangeably mounted on the upper holding device 1 as described above is formed with a wedge portion 9W having a contact surface 9F brought into contact with a lower end surface 7E of the 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 the push member 33 of the upper-tool pressing-down and fixing member 11.
  • the wedge portion 9W is so formed as to provide a thin walled portion in the 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 cooperation with a lower tool 59 mounted on a lower table 57 of the press brake.
  • 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.
  • FIG. 3 A second embodiment of the upper tool holding device 1 according to the present invention will be described hereinbelow with reference to Figs. 3 to 5.
  • another upper tool 9 can be further clamped on the rear surface of the support plate 7.
  • a point different from the first embodiment is that a rear-side upper-tool pressing-down and fixing member 61 is attached to the rear surface of the support plate 7 in order to clamp the other upper tool 9 on the rear surface of the support plate 7.
  • a stud 63 formed with a semispherical head portion 63H is attached horizontally to the rear surface of the support plate 7 of the holder body 5 with the use of a mounting bolt 65.
  • the rear-side upper-tool pressing-down and fixing member 61 is pivotally supported by this stud 63.
  • the front side upper-tool pressing-down and fixing member 11 is formed with a tool hole 11T, and a locking pin 67 engaged with a groove 61G formed in the rear-side upper-tool pressing-down and fixing member 61 is attached to the head portion 63H of the stud 63. Accordingly, when the mounting bolt 65 is rotated, the stud 63 will not be rotated.
  • the clamping-force producing device 13 In order to use the clamping-force producing device 13 in common for both the front-side upper-tool pressing-down and fixing member 11 and the rear-side upper-tool pressing-down and fixing member 61, the clamping-force producing device 13 is housed in the holder body 5, and a small diameter hole 69 is formed in the rear wall of an inner hollow portion 5H. Further, a contact member 71 mounted on the upper portion of the rear-side upper-tool pressing-down and fixing member 61 is passed through the small diameter hole 69 so as to be brought into contact with a head portion 45H of an adjust screw 45.
  • a ring nut 73 is screwed into left side (in Fig. 5) of the inner hollow portion 5H in order to restrict the movement of the contact member 51 of the clamp adjusting device 13.
  • front-side upper-tool pressing-down and fixing member 11 is kept under the condition that an appropriate member is sandwiched between the support plate 7 and the lower end of the front-side upper-tool pressing-down and fixing member 11 (to hold the front-side upper-tool pressing-down and fixing member 11 at a fixed condition relative to the support plate 7), it is possible to fasten and release the upper tool 9 by use of the rear-side upper-tool pressing-down and fixing member 61 by operating the lever 39.
  • two upper tools 9 can be fixed (both sides of each upper tool 9 are reversed) to the front and rear side surfaces of the support plate 7 of the holder body 5 according to the bending shape of the workpiece W, and in addition it is possible to exchange the upper tools 9 easily in the same way as with the case of the first embodiment.
  • an upper tool or upper tools 9 can be exchanged easily in spite of the simple structure, and in addition it is possible to prevent the upper tool 9 from being dropped even when the upper tool holding device 1 is released from the fixed upper tool 9, thus improving the safety of the press brake.

Claims (5)

  1. Oberwerkzeughaltevorrichtung (1) für eine Presse zur lösbaren Befestigung eines Oberwerkzeuges (9) an einem oberen Tisch (3) der Presse, die aufweist:
    einen an dem oberen Tisch (3) befestigten Haltekörper (5);
    eine an einem unteren Abschnitt des Haltekörpers (5) vorgesehene Stützplatte (7);
    ein Oberwerkzeugniederdrück- und -befestigungsteil (11), das an dem Haltekörper (5) angebracht ist, zum festen Niederhalten eines oberen Abschnittes eines Oberwerkzeuges (9) in Zusammenwirkung mit der Stützplatte (7);
    eine Klemmkrafterzeugungsvorrichtung (13) zur Beaufschlagung des Oberwerkzeugniederdrück- und -befestigungsteils (11); und
    eine Klemmentlastungsvorrichtung (15) zur Freigabe des Niederdrückens des Oberwerkzeuges (9), wobei die Klemmentlastungsvorrichtung (15) an einem oberen Abschnitt des Oberwerkzeugniederdrück- und -befestigungsteils (11) vorgesehen ist,
       dadurch gekennzeichnet, daß
    die Klemmkrafterzeugungsvorrichtung (13) ein elastisches Teil (49) aufweist, das die Klemmkraft erzeugt, wobei das elastische Teil (49) verstellbar ist, um dessen elastische Kraft und dadurch die Klemmkraft des Oberwerkzeugniederdrück- und - befestigungsteils (11) zu ändern,
    das elastische Teil (49) mit der Klemmentlastungsvorrichtung (15) zusammenwirkt, und
    die Klemmentlastungsvorrichtung (15) ausgebildet ist, um zwischen einem Befestigungszustand, in dem das elastische Teil (49) zumindest teilweise zusammengedrückt ist und in der ein Werkzeug (9) angekoppelt oder gehalten werden kann, und einem Entlastungszustand, in dem das Werkzeug entfernt werden kann, bewegt zu werden.
  2. Oberwerkzeughaltevorrichtung (1) für eine Presse nach Anspruch 1, bei der das Oberwerkzeugniederdrück- und -befestigungsteil (11) von dem Haltekörper (5) schwenkbar abgestützt ist, wobei der obere Abschnitt des Oberwerkzeugniederdrück- und -befestigungsteils (11) durch die Klemmkrafterzeugungsvorrichtung (13) beaufschlagt ist in einer Richtung, um von dem Haltekörper (5) getrennt zu werden, um einen Niederdrück- und Befestigungsabschnitt (11c), der an einem unteren Abschnitt des Oberwerkzeugniederdrück- und -befestigungsteils (11) vorgesehen ist, in Richtung der Stützplatte (7) zu beaufschlagen, die Klemmentlastungsvorrichtung (15) eine durch einen Hebel (39) drehbare Befestigungsschraube (37) aufweist, und ein Ende der Befestigungsschraube (37) in Berührung mit der Klemmkrafterzeugungsvorrichtung (13) gebracht ist.
  3. Oberwerkzeughaltevorrichtung (1) für eine Presse nach Anspruch 1 oder 2, bei der die Klemmkrafterzeugungsvorrichtung (13) eine Einstellschraube (45) aufweist, die mit einem Mutterelement (43) in Eingriff steht, um eine Anlageposition zwischen zwei Teilen einzustellen, ein Ringteil (47), das auf die Einstellschraube (45) aufgesetzt ist, um in Axialrichtung verschiebbar zu sein, und das elastische Teil (49), das zwischen einem Kopfabschnitt (45H) der Einstellschraube (45) und dem Ringteil (47) angeordnet ist.
  4. Oberwerkzeughaltevorrichtung (1) nach Anspruch 1 oder 2, bei der zwei Oberwerkzeugniederdrück- und -befestigungsteile (11) an beiden Seitenwänden des Haltekörpers (5) schwenkbar abgestützt sind, und die Klemmkrafterzeugungsvorrichtung (13) gemeinsam für beide Oberwerkzeugniederdrück- und -befestigungsteile (11) eingesetzt ist.
  5. Oberwerkzeughaltevorrichtung (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Klemmkrafterzeugungsvorrichtung (13) in einem Horizontalinnenhohlabschnitt (5H), der in einem oberen Blockabschnitt (5B) des Haltekörpers (5) ausgebildet ist, angeordnet ist.
EP93107463A 1992-05-15 1993-05-07 Oberwerkzeugträger für eine Presse Expired - Lifetime EP0569880B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94118710A EP0644002B1 (de) 1992-05-15 1993-05-07 Oberes Werkzeug für Biegepresse

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP123183/92 1992-05-15
JP12318392 1992-05-15
JP133511/92 1992-05-26
JP4133511A JP2500247B2 (ja) 1992-05-26 1992-05-26 プレスブレ―キ用上型
JP4331318A JPH0813379B2 (ja) 1992-05-15 1992-12-11 プレスブレーキ用金型ホルダ
JP331318/92 1992-12-11

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP94118710.6 Division-Into 1993-05-07
EP94118710A Division EP0644002B1 (de) 1992-05-15 1993-05-07 Oberes Werkzeug für Biegepresse

Publications (3)

Publication Number Publication Date
EP0569880A2 EP0569880A2 (de) 1993-11-18
EP0569880A3 EP0569880A3 (de) 1994-01-12
EP0569880B1 true EP0569880B1 (de) 1998-01-14

Family

ID=27314657

Family Applications (2)

Application Number Title Priority Date Filing Date
EP93107463A Expired - Lifetime EP0569880B1 (de) 1992-05-15 1993-05-07 Oberwerkzeugträger für eine Presse
EP94118710A Expired - Lifetime EP0644002B1 (de) 1992-05-15 1993-05-07 Oberes Werkzeug für Biegepresse

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP94118710A Expired - Lifetime EP0644002B1 (de) 1992-05-15 1993-05-07 Oberes Werkzeug für Biegepresse

Country Status (2)

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EP (2) EP0569880B1 (de)
DE (2) DE69323876T2 (de)

Families Citing this family (19)

* 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
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
US5507170A (en) * 1993-05-18 1996-04-16 Amada Metrecs Company, Limited Upper tool for press brake
TW249765B (de) * 1993-05-18 1995-06-21 Amatamedory Kk
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
US7296457B2 (en) 2004-06-25 2007-11-20 Wilson Tool International Inc. Thermally-actuated press brake tool holder technology
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3136440A1 (de) * 1981-09-14 1983-03-31 Paul Weinbrenner Maschinenbau GmbH + Co KG, 7252 Weil der Stadt Spannvorrichtung zum spannen von werkzeugen
FR2609909A1 (fr) * 1987-01-28 1988-07-29 Norlander Goran Dispositif serre-outil pour presse plieuse

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* 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
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
FR2643838B1 (fr) * 1989-03-02 1991-05-31 Treillet Jean Dispositif de fixation rigide pour des pieces suspendues telles que poincons de presse-plieuse

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3136440A1 (de) * 1981-09-14 1983-03-31 Paul Weinbrenner Maschinenbau GmbH + Co KG, 7252 Weil der Stadt Spannvorrichtung zum spannen von werkzeugen
FR2609909A1 (fr) * 1987-01-28 1988-07-29 Norlander Goran Dispositif serre-outil pour presse plieuse

Also Published As

Publication number Publication date
EP0644002A2 (de) 1995-03-22
DE69316263T2 (de) 1998-04-30
EP0569880A3 (de) 1994-01-12
EP0644002B1 (de) 1999-03-10
DE69316263D1 (de) 1998-02-19
DE69323876D1 (de) 1999-04-15
EP0569880A2 (de) 1993-11-18
EP0644002A3 (de) 1995-10-18
DE69323876T2 (de) 1999-07-01

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