EP0644002B1 - Upper tool for press brake - Google Patents
Upper tool for press brake Download PDFInfo
- 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
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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)
Description
- 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. According to this prior art document, 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. Upon rotation of the tool 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.
- As is well known, 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.
- To bend a place like workpiece for instance, 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.
- 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 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.
- 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-tool 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 solved with an upper tool for a press brake as defined in claim 1.
- 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 a contact surface 9F brought into contact with alower end surface 7E of a support plate 7, a slidingsurface 9S brought into slidable contact with afront surface 7F of the support 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); 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 theupper tool 9 between the upper-tool pressing-down and fixingmember 11 and the support 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 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 theupper block portion 5B. To the front surface (on the left side in Fig. 2) of theupper block portion 5B of the holder 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 the
mounting 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 the holder body 5 and the upper table 3 to adjust the vertical position of the holder 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 the holder body 5 will not drop, it is possible to adjust the vertical position of the holder 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 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 theupper tool 9 in cooperation with the support 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 the support 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, aweak coil spring 31 is elastically disposed between the upper-tool pressing-down and fixingmember 11 and the support plate 7 so that the twomembers 11 and 7 are urged to be away form each other. - 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 the support 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 the holder 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 the
fastening 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 the support plate 7 of the holder 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 the holder 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 the support 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 the support 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 the holder body 5. - When the
upper tool 9 is relatively moved gradually toward the holder 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 the
upper tool 9 is brought into contact with thelower end surface 7E of the support 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.
Claims (7)
- Upper tool (9) for a press brake, said upper tool comprising a shank adapted to be clamped to a holder body (5) by a clamping force of a pressing-down and fixing member (11),
wherein said shank has a clamp surface (9C) for engagement with the pressing-down and fixing member (11),
characterized in that
the clamp surface (9C) is inclined in such a way that the shank becomes narrower towards its end directed to the holder body (5) . - Upper tool according to claim 1, characterized in that said inclined clamp surface (9C) terminates in an upper end projection (9P) at the upper end of said shank (9W).
- Upper tool according to claim 1 or 2, characterized in that said shank (9W) further comprises a slide surface (9S) opposite said clamp surface (9C) being inclined with respect to said slide surface (9S).
- Upper tool according to one of claims 1 to 3, characterized by a work processing portion (9M) for processing a workpiece (W) in cooperation with a lower tool (59), said work processing portion (9M) being provided at the lower end of said tool.
- Upper tool according to one of claims 1 to 4 in combination with a press brake, said press brake having a holder body (5) and a pressing-down and fixing member (11) of an upper tool holding device (1) which is to be mounted on an upper table (3) of the press brake, characterized in that the shank (9W) has a contact surface (9F) to be brought into contact with a lower surface (7E) of a support plate (7) provided on the holder body (5), and that the slide surface (9) is adapted to be brought into sliding contact with a vertical surface of said support plate (7), and that the clamp surface (9C) is adapted to be brought into pressure contact with a pressing-down and fixing section (11C) of said upper tool pressing-down and fixing member (11).
- Combination of an upper tool and a press brake according to claim 5, characterized in that the upper end projection (9P) can engage with said pressing-down and fixing section (11C).
- Combination of an upper tool and a press brake according to claim 5 or 6, characterized in that the vertical length of said clamp surface (9C) is greater than a gap between the lower surface (7E) of the holder body (5) and said contact surface (9F) forming a shoulder portion of said upper tool (9) when the upper end projection (9P) engages the pressing-down and fixing member (11).
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 |
---|---|---|---|
EP93107463.7 Division | 1993-05-07 | ||
EP93107463A Division EP0569880B1 (en) | 1992-05-15 | 1993-05-07 | Upper tool holding device for press brake |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0644002A2 EP0644002A2 (en) | 1995-03-22 |
EP0644002A3 EP0644002A3 (en) | 1995-10-18 |
EP0644002B1 true EP0644002B1 (en) | 1999-03-10 |
Family
ID=27314657
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94118710A Expired - Lifetime EP0644002B1 (en) | 1992-05-15 | 1993-05-07 | Upper tool for press brake |
EP93107463A Expired - Lifetime EP0569880B1 (en) | 1992-05-15 | 1993-05-07 | Upper tool holding device for press brake |
Family Applications After (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) | EP0644002B1 (en) |
DE (2) | DE69316263T2 (en) |
Cited By (1)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5513514A (en) * | 1994-05-06 | 1996-05-07 | Amada Metrecs Company, Limited | Upper tool and upper tool holding device for press brake |
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 |
TW249765B (en) * | 1993-05-18 | 1995-06-21 | Amatamedory Kk | |
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 |
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 (en) * | 1995-10-02 | 1999-07-19 | 株式会社アマダメトレックス | Upper die holder device for press brake |
NL1004266C1 (en) * | 1996-10-14 | 1998-04-15 | Cornelis Hendricus Liet | Toolholder for multi=part clamps for setting or folding benches |
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 |
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 |
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 |
EP3906126A4 (en) * | 2018-12-31 | 2022-02-23 | 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 |
Family Cites Families (6)
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 | |
DE3136440A1 (en) * | 1981-09-14 | 1983-03-31 | Paul Weinbrenner Maschinenbau GmbH + Co KG, 7252 Weil der Stadt | Clamping device for clamping tools |
JPH0716713B2 (en) * | 1986-05-14 | 1995-03-01 | 株式会社アマダ | Mold 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 |
FR2609909A1 (en) * | 1987-01-28 | 1988-07-29 | Norlander Goran | Tool-gripping device for a bending press |
FR2643838B1 (en) * | 1989-03-02 | 1991-05-31 | Treillet Jean | RIGID FIXING DEVICE FOR HANGING PARTS SUCH AS BENDING PRESS PUNCHES |
-
1993
- 1993-05-07 EP EP94118710A patent/EP0644002B1/en not_active Expired - Lifetime
- 1993-05-07 DE DE1993616263 patent/DE69316263T2/en not_active Expired - Fee Related
- 1993-05-07 DE DE1993623876 patent/DE69323876T2/en not_active Expired - Fee Related
- 1993-05-07 EP EP93107463A patent/EP0569880B1/en not_active Expired - Lifetime
Cited By (1)
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 |
---|---|
EP0569880A2 (en) | 1993-11-18 |
EP0569880A3 (en) | 1994-01-12 |
DE69323876T2 (en) | 1999-07-01 |
EP0569880B1 (en) | 1998-01-14 |
EP0644002A2 (en) | 1995-03-22 |
EP0644002A3 (en) | 1995-10-18 |
DE69316263D1 (en) | 1998-02-19 |
DE69323876D1 (en) | 1999-04-15 |
DE69316263T2 (en) | 1998-04-30 |
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