EP0644002A2 - Upper tool for press brake - Google Patents
Upper tool for press brake Download PDFInfo
- Publication number
- EP0644002A2 EP0644002A2 EP94118710A EP94118710A EP0644002A2 EP 0644002 A2 EP0644002 A2 EP 0644002A2 EP 94118710 A EP94118710 A EP 94118710A EP 94118710 A EP94118710 A EP 94118710A EP 0644002 A2 EP0644002 A2 EP 0644002A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- pressing
- upper tool
- 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.)
- Granted
Links
Images
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 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).
Abstract
Description
- The present invention relates to an upper tool for a press brake, comprising a shank to be clamped to a support body mounted on an upper table by a clamping force of a pressing-down and fixing member.
- As is well known, a press brake is provided with an upper table (referred to as an upper apron, sometimes) and a lover 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 cable is disposed movably in the vertical direction.
- To bend a plate like workpiece for instance, 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 lover tools can be engaged with each other, a workpiece positioned between the upper and lower tools is to be bent.
- Further, in the above-mentioned press brake, 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, In other words, the upper tools are supported by a number of upper holders so as to be exchanged.
- In the prior art upper tool holder, the structure is such that in 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.
- Therefore, when the upper tool is required to be exchanged with another one, since a number of fastening bolts provided for a number of upper tool holders must be loosened, there exists a problem in that the exchanging work of the upper tool is extremely complicated and therefore troublesome.
- To overcome the above-mentioned problem, a structure such that air cylinders are mounted on the upper tool holders to fasten and loosen the upper-tool pressing-down and fixing members has been developed.
- In the above-mentioned structure, however, since an air cylinder must be provided for each of a number of the upper tool holders and additionally an air source is required, there raises another problem in that the structure is further complicated and therefore costly.
- Further, in the prior art structure, there exists such a danger that when the pressing-down and fixing of the upper tool by means of the upper-tool pressing-down and fixing member is loosened, the upper tool drops. Further, when the upper tool is mounted on the upper tool holder, the upper-tool pressing-down and fixing member must be fastened tightly under the conditions that the upper-cool pressing-down and fixing member is fastened slightly to such an extent that the upper tool will not drop and thereafter the upper and lower tools are aligned with respect to each other, thus causing a problem in that the upper tool exchanging work is troublesome.
- With these problems in mind, therefore, it is an objective of the present invention to provide an improved upper tool for a press brake, which can be easily and quickly exchanged in an upper tool holder.
- According to the present invention, the aforementioned objective is performed in that said shank is formed with an inclined surface for gradually increasing the clamping force of the pressing-down and fixing member to said upper tool by relative movement of said upper tool to the support body.
- Preferred embodiments of the invention are laid down in the subclaims.
- Hereinafter, the present invention is illustrated and explained in greater detail by means of a preferred embodiment thereof and accompanying drawings, wherein:
- Fig. 1 is a front view showing an upper tool according to an embodiment of the present invention, the upper tool being clamped to a holding device;
- Fig. 2 is a cross-sectional view taken along the lines 200-200 shown in figure 1.
- An upper tool according to a preferred embodiment of the present invention is generally indicated by the
reference numeral 9. - As shown in Fig. 2, the
upper tool 9 exchangeably mounted on the upper holding device 1 as described later on, is formed with awedge portion 9W having acontact surface 9F brought into contact with a lower end surface 7E of asupport plate 7, a slidingsurface 9S brought into slidable contact with afront surface 7F of thesupport plate 7, and aclamp surface 9C brought into tight contact with apush member 33 of an upper-tool pressing-down and fixingmember 11. - The
wedge portion 9W is so formed as to provide a thin walled portion in an upward direction by forming theclamp surface 9C as an inclined surface. Further, thewedge portion 9W is formed with aprojection portion 9P engageable with the pressing-down and fixingsection 11C of the upper-tool pressing-down and fixingmember 11. - Further, the
upper tool 9 is formed with a lower endwork processing portion 9M for bending a workpiece W in co-operation with alower tool 59 mounted on a lower table 57 of the press brake. - In the following the upper holding device is briefly elucidated, so as to make the interaction between the
upper tool 9 and the upper holding device 1 and the tool exchange procedure better understandable. - As shown in Figs. 1 and 2, 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); thesupport plate 7 formed integral with the lower part of theholder body 5; the upper-tool pressing-down and fixingmember 11 for pressing-down and fixing theupper tool 9 between the upper-tool pressing-down and fixingmember 11 and thesupport plate 7; a clamping-force producing device 13 for producing the clamping force of the upper-tool pressing-down and fixingmember 11, and aclamp releasing device 15 for releasing theupper tool 9 from the upper-tool pressing-own and fixingmember 11. - In more detail, the
holder body 5 is formed with anupper block portion 5B having a hick wall in the front and rear direction (in the right and left direction in Fig. 2). Thesupport plate 7 is formed integral with the lower part of theupper block portion 5B. To the front surface (on the left side in Fig. 2) of theupper block portion 5B of theholder body 5, amounting 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 themounting plate 19 into contact with the front lower portion of the upper table 3 and by fastening aclamp jaw 23 with the use of fasteningbolts 21 screwed into the upper table 3. - A
wedge member 25 is interposed between the upper surface of theholder body 5 and the upper table 3 to adjust the vertical position of theholder body 5. - In the structure as described above, under the condition that the
clamp jaw 23 is slightly fastened against themounting plate 19 to such an extent that theholder body 5 will not drop, it is possible to adjust the vertical position of theholder body 5 finely in the downward direction by striking thewedge member 25 slightly. - 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 theholder body 5 in the right and left direction in Fig. 1, and pivotally supported by theholder body 5 so as to fix theupper tool 9 in cooperation with thesupport plate 7. - In more detail, the upper-tool pressing-down and fixing
member 11 is formed with throughholes 11H at roughly the middle portion (in the vertical direction) thereof (see Fig. 2), and pivotally supported by a plurality ofmounting bolts 27 passed through the throughholes 27H and screwed in the horizontal direction into thesupport plate 7. To facilitate the pivotal motion thereof, aspherical washer 29 is interposed between ahead portion 27H of each of themounting bolts 27 and the upper-tool pressing-down and fixingmember 11. In addition, a weak coil spring 31 is elastically disposed between the upper-tool pressing-down and fixingmember 11 and thesupport plate 7 so that the twomembers - On the lower portion of the upper-tool pressing-down and fixing
member 11, two pressing-down and fixingsections 11C are projectingly formed to press theupper tool 9 against thesupport plate 7 for clamping theupper tool 9. In addition, apush member 33 for pressing theupper tool 9 is mounted on the pressing-down and fixingsection 11C with abolt 35. - The
clamp releasing device 15 is provided on the upper portion of the upper-tool pressing-down and fixingmember 11 to release theupper tool 9 clamped by the pressing-down and fixingsection 11C of the upper-tool pressing-down and fixingmember 11. - The
clamp releasing device 15 includes a fasteningscrew 37 screwed into the upper portion of the upper-tool pressing-down and fixingmember 11, and alever 39 is attached to thisfastening screw 37. - Accordingly, when the
lever 39 is pivoted, it is possible to fasten and unfasten thefastening screw 37. Further, to limit the operational (pivotal) range of thelever 39, two right andleft limit pins 41 are implanted on themounting plate 19. - The clamping-
force producing device 13 includes anadjust screw 45 engaged with anut member 43 for relative positional adjustment, aring member 47 fitted to theadjust 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 thehead portion 45H of theadjust screw 45 and thering member 47, as shown in Fig. 2. The clamping-force producing device 13 is disposed in a horizontal innerhollow portion 5H formed in theupper block portion 5B of theholder body 5. - In the above-mentioned structure, it is possible to adjust the elastic force (the compressive condition) of the
elastic member 49 by adjusting the engage position between theadjust screw 45 and thenut member 43. - Further, a
contact member 51 in contact with the front end portion of thefastening screw 37 is formed integral with thering member 47. Ahead portion 45H of theadjust screw 45 is in contact with the side wall of thehollow portion 5H. - In the structure as described above, under the condition that the
upper tool 9 is clamped between thesupport plate 7 of theholder body 5 and the upper-tool pressing-down and fixingmember 11 as shown in Fig. 2, when thelever 39 of theclamp releasing device 15 is pivoted clockwise to a position R in Fig. 1 to fasten thefastening screw 37, because of theelastic member 49 being further compressed, the elastic force of thiselastic member 49 is further increased, so that it is possible to fasten theupper tool 9 by a still stronger fastening force. - In contrast with this, when the
lever 39 is pivoted counterclockwise to a position L in Fig. 1 to unfasten thefastening screw 37, it is possible to release the fixedupper tool 9 from the fixed condition. - As described above, when the
lever 39 is pivoted to fix or release theupper tool 9, the upper-tool pressing-down and fixingmember 11 is pivoted in the right and left directions in Fig. 2 on themounting bolts 27 acting as pivot centers. - As shown in Fig. 1, a plurality of
small piece members 53 are attached to theholder body 5 withbolts 55 so as to be brought into contact with the upper surface of the upper-tool pressing-down and fixingmember 11, in order to guide the pivotal motion of the upper-tool pressing-down and fixingmember 11 and further to restrict the upward movement of the upper-tool pressing-down and fixingmember 11. Accordingly, the upper-tool pressing-down and fixingmember 11 can press down and fix theupper tool 9 without moving in the vertical direction. - In the structure as described above, the
upper tool 9 is mounted on the upper tool holding device 1 in accordance with the following procedure: - First, the
lever 39 of theclamp releasing device 15 is pivoted in the clockwise direction to hold the fasteningscrew 37 in the fastened condition. Even under the condition that thefastening screw 37 is fastened as described above, thepush member 33 formed at the lower portion of the upper-tool pressing-down and fixingmember 11 is kept away from thesupport plate 7. - Accordingly, as shown by phantom lines in Fig. 2, it is possible to insert the upper thin walled portion of the
wedge portion 9W of theupper tool 9 into between thesupport plate 7 and the upper-tool pressing-down and fixingmember 11 in the horizontal direction so that anupper projection portion 9P of theupper tool 9 is engaged with the pressing-down and fixingsection 11C of the upper-tool pressing-down and fixingmember 11. - Thereafter, the movable side of the upper or lower table 3 or 57 is moved up and down to engage the
upper tool 9 with thelower tool 59, with the result that theupper tool 9 is moved upward relative to theholder body 5. - When the
upper tool 9 is relatively moved gradually toward theholder body 5, because of thepush member 33 of the upper-tool pressing-down and fixingmember 11 being pushed toward the left in Fig. 2 by theinclined clamp surface 9C of theupper tool 9, the upper-tool pressing-down and fixingmember 11 is pivoted in the clockwise direction in Fig. 2, so that theelastic member 49 of the clampforce adjusting device 13 is compressed gradually. - Accordingly, when the
contact surface 9F of theupper tool 9 is brought into contact with the lower end surface 7E of thesupport plate 7, it is possible to obtain such a condition that thewedge portion 9W of theupper tool 9 is fastened and fixed strongly by the upper-tool pressing-down and fixingmember 11 which is urged in the counterclockwise direction by the elastic force of theelastic member 49. Therefore, it is possible to easily mount theupper tool 9 on the upper tool holding device 1. - The
upper tool 9 can be removed from the upper tool holding device 1 as follows: - First, the
lever 39 of theclamp releasing device 15 is pivoted in the counterclockwise direction to loosen the fastening force of thefastening screw 37, so that theupper tool 9 is released from the upper-tool pressing-down and fixingmember 11. When the fastened condition of theupper tool 9 is released and therefore theupper tool 9 is moved downward by its weight, theprojection 9P of thewedge portion 9W of theupper tool 9 is engaged with theclamp portion 11C of the upper-tool pressing-down and fixingmember 11, so that it is possible to prevent theupper tool 9 from being dropped. - As described above, under the condition that the
upper tool 9 is released from the fastening or fixed condition, when theupper tool 9 is moved in the horizontal direction, it is possible to easily remove theupper tool 9 from the upper tool holding device 1. - In other words, in the embodiment according to the present invention, it is possible to easily exchange the
upper tool 9 clamped by the upper holding device 1 with another upper tool, in spite of such a simple structure as described above, without use of any tools.
Claims (6)
- An upper tool (9) for a press brake, comprising a shank to be clamped to a support body (5) mounted on an upper table (3) by a clamping force of a pressing-down and fixing member (11), characterised in that said shank is formed with an inclined surface (9c) for gradually increasing the clamping force of the pressing-down and fixing member (11) to said upper tool (9) by relative movement of said upper tool (9) to the support body (5).
- An upper tool (9) for a press brake according to claim 1, wherein said pressing-down and fixing member (11) is attached to the support body (5) by an attaching member (27) so that the pressing-down and fixing member (11) can pivot on the attaching member (27), and said pressing-down and fixing member (11) presses and fixes said upper tool (9) to said support body (5) by being urged by a clamping-force producing device (13).
- An upper tool (9) for a press brake according to claim 1 or 2, wherein a dimension of said inclined surface in a vertical direction, when an upper projection portion (9P) of said upper tool engages the pressing-down and fixing member (11), is more than a gap between a lower surface (7E) of the support body (5) and a shoulder portion (9F) of said upper tool (9).
- An upper tool (9) for a press brake, adapted to be attached on an upper tool holding device (1) mounted on an upper table (3) of the press brake, comprising a work processing portion (9M) for processing a workpiece (W) in co-operation with a lower tool (59), characterised by a wedge portion (9W) having a contact surface (9F) brought into contact with a lower surface (7E) of a support plate (7) provided on a holder body (5) of the upper tool holding device (1), a slide surface (9S) slidably brought into contact with a front or rear surface of the support plate (7), and a clamp surface (9C) brought into pressure contact with a pressing-down and fixing section (11C) of an upper-tool pressing-down and fixing member (11) of the upper tool holding device (1).
- Upper tool (9) for a press brake according to claim 4 or 5, wherein said wedge portion (9W) is formed, on the upper side thereof, with a projecting portion (9P) engageable with the pressing-down and fixing section (11C) of the upper-tool pressing-down and fixing member (11).
- Upper tool for a press brake according to claim 4 or 5, wherein said clamp surface (9C) is inclined with respect to said slide surface (9S), such that said wedge portion (9W) tapers continuously towards the upper side thereof.
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP123183/92 | 1992-05-15 | ||
JP12318392 | 1992-05-15 | ||
JP133511/92 | 1992-05-26 | ||
JP4133511A JP2500247B2 (en) | 1992-05-26 | 1992-05-26 | Upper mold for press brake |
JP4331318A JPH0813379B2 (en) | 1992-05-15 | 1992-12-11 | Mold holder for press brake |
JP331318/92 | 1992-12-11 | ||
EP93107463A EP0569880B1 (en) | 1992-05-15 | 1993-05-07 | Upper tool holding device for press brake |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93107463A Division EP0569880B1 (en) | 1992-05-15 | 1993-05-07 | Upper tool holding device for press brake |
EP93107463.7 Division | 1993-05-07 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0644002A2 true EP0644002A2 (en) | 1995-03-22 |
EP0644002A3 EP0644002A3 (en) | 1995-10-18 |
EP0644002B1 EP0644002B1 (en) | 1999-03-10 |
Family
ID=27314657
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93107463A Expired - Lifetime EP0569880B1 (en) | 1992-05-15 | 1993-05-07 | Upper tool holding device for press brake |
EP94118710A Expired - Lifetime EP0644002B1 (en) | 1992-05-15 | 1993-05-07 | Upper tool for press brake |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93107463A Expired - Lifetime EP0569880B1 (en) | 1992-05-15 | 1993-05-07 | Upper tool holding device for press brake |
Country Status (2)
Country | Link |
---|---|
EP (2) | EP0569880B1 (en) |
DE (2) | DE69323876T2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1005108C2 (en) * | 1996-10-14 | 1998-04-15 | Cornelis Hendricus Liet | Tool holder for the multi-part clamping tool of a folding or folding bench or the like, as well as a folding or folding bench or the like provided with such a tool holder. |
US5794486A (en) * | 1995-10-02 | 1998-08-18 | Amada Metrecs Company, Limited | Upper tool holder apparatus for press brake |
US6003360A (en) * | 1997-07-01 | 1999-12-21 | Wilson Tool International, Inc. | Press brake tool holder |
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 |
US7721586B2 (en) | 2005-02-08 | 2010-05-25 | Wilson Tool International Inc. | Press brake tool seating technology |
Families Citing this family (13)
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 (en) * | 1993-05-18 | 1994-11-22 | 株式会社アマダメトレックス | Upper mold for press brake |
US5507170A (en) * | 1993-05-18 | 1996-04-16 | Amada Metrecs Company, Limited | Upper tool for press brake |
TW249765B (en) * | 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 |
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 |
CN101417303B (en) * | 2008-12-01 | 2010-11-10 | 米路加(深圳)科技发展有限公司 | Die clamp |
CN108067543B (en) * | 2017-11-23 | 2019-08-20 | 马鞍山市国菱机械刃模有限公司 | A kind of fixed device of the upper mold of good clamping effect |
US20220080486A1 (en) * | 2018-12-31 | 2022-03-17 | Durmazlar Makina Sanayi Ve Ticaret Anonim Sirketi | An auxiliary bending tool for bending machines |
CN115213263B (en) * | 2022-09-20 | 2022-12-13 | 烟台精锐模具有限公司 | Fine-adjustable stamping machine for inner elastic sheet of printer |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE749638C (en) * | 1939-09-22 | 1944-11-28 | Cutting and bending tool with column guide frame and exchangeable cutting and bending elements | |
JPS62267019A (en) * | 1986-05-14 | 1987-11-19 | Amada Co Ltd | Metal die clamping device for bending machine |
FR2598946A1 (en) * | 1986-05-20 | 1987-11-27 | Promecan Sisson Lehmann | Device for fixing a punch or a die onto a table (deck, apron) of a bending press |
EP0387121A1 (en) * | 1989-03-02 | 1990-09-12 | Amada S.A. | Clamping device for a long piece such as a punch, a die or such a tool on a table of a press bending machine |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3136440A1 (en) * | 1981-09-14 | 1983-03-31 | Paul Weinbrenner Maschinenbau GmbH + Co KG, 7252 Weil der Stadt | Clamping device for clamping tools |
FR2609909A1 (en) * | 1987-01-28 | 1988-07-29 | Norlander Goran | Tool-gripping device for a bending press |
-
1993
- 1993-05-07 EP EP93107463A patent/EP0569880B1/en not_active Expired - Lifetime
- 1993-05-07 DE DE1993623876 patent/DE69323876T2/en not_active Expired - Fee Related
- 1993-05-07 DE DE1993616263 patent/DE69316263T2/en not_active Expired - Fee Related
- 1993-05-07 EP EP94118710A patent/EP0644002B1/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE749638C (en) * | 1939-09-22 | 1944-11-28 | Cutting and bending tool with column guide frame and exchangeable cutting and bending elements | |
JPS62267019A (en) * | 1986-05-14 | 1987-11-19 | Amada Co Ltd | Metal die clamping device for bending machine |
FR2598946A1 (en) * | 1986-05-20 | 1987-11-27 | Promecan Sisson Lehmann | Device for fixing a punch or a die onto a table (deck, apron) of a bending press |
EP0387121A1 (en) * | 1989-03-02 | 1990-09-12 | Amada S.A. | Clamping device for a long piece such as a punch, a die or such a tool on a table of a press bending machine |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 012 no. 145 (M-693) ,6 May 1988 & JP-A-62 267019 (AMADA CO LTD) 19 November 1987, * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5794486A (en) * | 1995-10-02 | 1998-08-18 | Amada Metrecs Company, Limited | Upper tool holder apparatus for press brake |
NL1005108C2 (en) * | 1996-10-14 | 1998-04-15 | Cornelis Hendricus Liet | Tool holder for the multi-part clamping tool of a folding or folding bench or the like, as well as a folding or folding bench or the like provided with such a tool holder. |
US6003360A (en) * | 1997-07-01 | 1999-12-21 | Wilson Tool International, Inc. | Press brake tool holder |
US7308817B2 (en) | 2005-02-08 | 2007-12-18 | Wilson Tool International Inc. | Push plate tool holder for press brakes |
US7721586B2 (en) | 2005-02-08 | 2010-05-25 | Wilson Tool International Inc. | Press brake tool seating technology |
US7596983B2 (en) | 2005-07-11 | 2009-10-06 | Wilson Tool International Inc. | Press brake clamp incorporating tool-seating mechanism |
US7669454B2 (en) | 2005-07-11 | 2010-03-02 | Wilson Tool International Inc. | Press brake tool holder incorporating tool-seating mechanism |
Also Published As
Publication number | Publication date |
---|---|
DE69316263T2 (en) | 1998-04-30 |
EP0569880A3 (en) | 1994-01-12 |
EP0569880B1 (en) | 1998-01-14 |
EP0644002B1 (en) | 1999-03-10 |
DE69316263D1 (en) | 1998-02-19 |
DE69323876D1 (en) | 1999-04-15 |
EP0569880A2 (en) | 1993-11-18 |
EP0644002A3 (en) | 1995-10-18 |
DE69323876T2 (en) | 1999-07-01 |
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