WO2000059655A1 - Tool holding fixture for bending brakes - Google Patents

Tool holding fixture for bending brakes Download PDF

Info

Publication number
WO2000059655A1
WO2000059655A1 PCT/EP2000/002857 EP0002857W WO0059655A1 WO 2000059655 A1 WO2000059655 A1 WO 2000059655A1 EP 0002857 W EP0002857 W EP 0002857W WO 0059655 A1 WO0059655 A1 WO 0059655A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
fixture
movable body
clamp
groove
Prior art date
Application number
PCT/EP2000/002857
Other languages
English (en)
French (fr)
Inventor
Gianluca Tarasconi
Original Assignee
Toolspress S.R.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toolspress S.R.L. filed Critical Toolspress S.R.L.
Priority to EP00926785A priority Critical patent/EP1165264B1/de
Priority to DE60002845T priority patent/DE60002845T2/de
Priority to AU45413/00A priority patent/AU4541300A/en
Priority to AT00926785T priority patent/ATE240798T1/de
Publication of WO2000059655A1 publication Critical patent/WO2000059655A1/en

Links

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
    • 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
    • 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
    • B21D5/0245—Fluid operated

Definitions

  • This invention relates to bending brakes and more particularly to the means for retaining and locking the working utensils used by these brakes.
  • Bending brakes generally comprise a structure supporting two vertically-positioned substantially coplanar opposing toolplates, of which one can move vertically. To the facing edges of the toolplates are fixed the means for retaining and locking the punch and die respectively, each of these being formed from a plurality of tools aligned in succession, they having the same shape but different lengths.
  • one or more tools have also to be changed, this being generally done by withdrawing or inserting the tools laterally in the direction of the edge of the metal sheet.
  • the tool retention and locking means comprise a lower channel into which the upper portion of the tool, also known as the shank, is inserted.
  • the tool can be inserted from below into a seat having the same form as the shank, and locked in position by a plurality of pneumatically operated pistons which enter a longitudinal groove provided in the tool snank.
  • Each tool also has a safety device comprising a lever for operating a peg movable within a hole in the tool shank. When the tool has been inserted into the seat in said retention and locking means, this peg is maintained elastically inserted in a longitudinal cavity in one of tne vertical walls of said seat.
  • the locking pistons are retracted so that the tool is supported only by the peg. At this point the tool can be withdrawn in the direction of the sheet edge, or by pressing said lever it can be withdrawn in the vertical direction.
  • the object of the invention is to overcome the aforementioned drawbacks within the framework of a rational, reliable and low-cost solution.
  • Figure 1 is an isometric schematic view of the brake on which the device of the invention is mounted.
  • Figure 2 is an isometric view of the invention.
  • Figure 3 is a front view in the direction III of Figure 2.
  • Figure 4 is a section on the line IV-IV of Figure 3.
  • Figure 5 is a section on the line V-V of Figure 3.
  • Figure 6 is a section on the line VI-VI of Figure 3.
  • the bending brake i comprises a movable upper toolplate 2 and a fixed lower toolplate 3.
  • the upper toolplate 2 lowerly carries a series of aligned tools 4 having tne same shape but different lengths, they forming overall the punch of the brake i.
  • the fixed lower toolplate 3 carries a series of aligned tools 5 forming the die of the brake 1.
  • the tools 4 forming the punch and the tools 5 forming the die are secured to the respective toolplates 2 and 3 by a series of mutually contacting aligned clamps 6, as shown in Figures
  • each clamp 6 has a length of 50 cm, and consists of a beam 61 having two successive recessed regions indicated by 610 and 611 respectively.
  • Tne recessed region 610 receives a plate 62 fixed to it by screws, not shown.
  • the plate 62 defines with the recessed region 611 a seat 63 for receiving the shanks 41 and 51 of the tools 4 and 5 respectively.
  • the plate 62 comprises a succession of in-line holes 60 each arranged to receive two balls 64 occupying together a space longer than the thickness of the plate 62.
  • a push rod or pin could be conveniently used instead of the balls.
  • each tool 4 and 5 which is inserted into the channel 63, there are provided two opposing longitudinal grooves
  • the beam 61 supports a series of leaf springs 9 fixed in a position inclined towards the beam by a line of bolts 91, and such that their lower portion elastically rests against the line of bails 64.
  • That portion facing the balls 64 is separated by cuts 92, between which individual independent elastic portions 93 of each spring 9 are defined.
  • the beam 61 also comprises a line of holes 100 communicating with a common upper manifold 101 via ducts 102.
  • the holes 100 are dead, with the r opening facing the plate 62.
  • a cup-shaped piston 103 with its axial dimension slightly less than the depth of the holes 100 is inserted into each hole 100.
  • the plate 62 comprises a hole 65 receiving a pin 66 which at one end is received within the piston
  • the beam 61 On the opposite side to that supporting the spring 9, the beam 61 has a central vertical recess 8 extending through its entire height.
  • a shaft 81 which carries two cams 82 close to its ends and is rigid with a central operating lever 83.
  • both the beam 61 and the plate 62 have a through hole 84 receiving a pin 85 which rests against the central spring 9.
  • the tools are inserted from the central position of each clamp 6, in the following manner. Pressurized fluid is fed to ail the pistons 103, to annul the pressure of the springs 9 on tne balls 64.
  • the lever 83 is then operated manually, and a first tool is inserted from below into its retention seat.
  • this embodiment refers to a brake having a movable upper toolplate and a fixed lower toolplate.
  • the upper toolplate can be fixed and the lower toolplate movable, or both toolplates movable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Clamps And Clips (AREA)
PCT/EP2000/002857 1999-04-07 2000-03-31 Tool holding fixture for bending brakes WO2000059655A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP00926785A EP1165264B1 (de) 1999-04-07 2000-03-31 Werkzeughaltevorrichtung für abkantbiegepressen
DE60002845T DE60002845T2 (de) 1999-04-07 2000-03-31 Werkzeughaltevorrichtung für abkantbiegepressen
AU45413/00A AU4541300A (en) 1999-04-07 2000-03-31 Tool holding fixture for bending brakes
AT00926785T ATE240798T1 (de) 1999-04-07 2000-03-31 Werkzeughaltevorrichtung für abkantbiegepressen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999RE000039A IT1309745B1 (it) 1999-04-07 1999-04-07 Attrezzatura portautensili ad elementi modulari per presse piegatrici.
ITRE99A000039 1999-04-07

Publications (1)

Publication Number Publication Date
WO2000059655A1 true WO2000059655A1 (en) 2000-10-12

Family

ID=11399412

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/002857 WO2000059655A1 (en) 1999-04-07 2000-03-31 Tool holding fixture for bending brakes

Country Status (7)

Country Link
EP (1) EP1165264B1 (de)
AT (1) ATE240798T1 (de)
AU (1) AU4541300A (de)
DE (1) DE60002845T2 (de)
ES (1) ES2195888T3 (de)
IT (1) IT1309745B1 (de)
WO (1) WO2000059655A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005080017A1 (en) * 2004-02-13 2005-09-01 Wilson Tool International, Inc. Press brake tool and tool holder
CN111971132A (zh) * 2018-02-21 2020-11-20 特鲁普机械奥地利有限公司及两合公司 具有工具更换单元和夹爪的生产设备以及更换工具的方法
WO2022019755A1 (en) * 2020-07-24 2022-01-27 Wila B.V. Clamping system for a press brake comprising two internally interconnected cavities, press brake comprising such a clamping system, and method of manufacturing an elongate beam for such a clamping system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (5)

* 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
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
EP0256245A2 (de) * 1986-08-12 1988-02-24 Eisen- und Hammerwerk GmbH Werkzeughalter für eine Gesenkbiegepresse od.dgl.
US5022256A (en) * 1988-09-29 1991-06-11 Machinefabriek Wila B.V. Clamping device
EP0494714A1 (de) * 1991-01-10 1992-07-15 Machinefabriek Wila B.V. Presswerkzeug und Adapter und Presse dafür

Patent Citations (5)

* 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
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
EP0256245A2 (de) * 1986-08-12 1988-02-24 Eisen- und Hammerwerk GmbH Werkzeughalter für eine Gesenkbiegepresse od.dgl.
US5022256A (en) * 1988-09-29 1991-06-11 Machinefabriek Wila B.V. Clamping device
EP0494714A1 (de) * 1991-01-10 1992-07-15 Machinefabriek Wila B.V. Presswerkzeug und Adapter und Presse dafür

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005080017A1 (en) * 2004-02-13 2005-09-01 Wilson Tool International, Inc. Press brake tool and tool holder
US7152453B2 (en) 2004-02-13 2006-12-26 Wilson Tool International, Inc. Press brake tool and tool holder
CN111971132A (zh) * 2018-02-21 2020-11-20 特鲁普机械奥地利有限公司及两合公司 具有工具更换单元和夹爪的生产设备以及更换工具的方法
US11992872B2 (en) 2018-02-21 2024-05-28 Trumpf Maschinen Austria Gmbh & Co. Kg Manufacturing facility with a tool-changing unit and clamping jaw, and method for changing a tool
WO2022019755A1 (en) * 2020-07-24 2022-01-27 Wila B.V. Clamping system for a press brake comprising two internally interconnected cavities, press brake comprising such a clamping system, and method of manufacturing an elongate beam for such a clamping system
NL2026131B1 (en) * 2020-07-24 2022-03-28 Wila Bv Clamping system for a press brake comprising two internally interconnected cavities, press brake comprising such a clamping system, and method of manufacturing an elongate beam for such a clamping system

Also Published As

Publication number Publication date
ES2195888T3 (es) 2003-12-16
IT1309745B1 (it) 2002-01-30
ITRE990039A1 (it) 2000-10-07
DE60002845T2 (de) 2004-01-22
EP1165264A1 (de) 2002-01-02
AU4541300A (en) 2000-10-23
DE60002845D1 (de) 2003-06-26
ATE240798T1 (de) 2003-06-15
ITRE990039A0 (it) 1999-04-07
EP1165264B1 (de) 2003-05-21

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