EP1165264A1 - Werkzeughaltevorrichtung für abkantbiegepressen - Google Patents

Werkzeughaltevorrichtung für abkantbiegepressen

Info

Publication number
EP1165264A1
EP1165264A1 EP00926785A EP00926785A EP1165264A1 EP 1165264 A1 EP1165264 A1 EP 1165264A1 EP 00926785 A EP00926785 A EP 00926785A EP 00926785 A EP00926785 A EP 00926785A EP 1165264 A1 EP1165264 A1 EP 1165264A1
Authority
EP
European Patent Office
Prior art keywords
channel
fixture
movable body
clamp
groove
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
Application number
EP00926785A
Other languages
English (en)
French (fr)
Other versions
EP1165264B1 (de
Inventor
Gianluca Tarasconi
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.)
Toolspress Srl
Original Assignee
Toolspress Srl
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 Srl filed Critical Toolspress Srl
Publication of EP1165264A1 publication Critical patent/EP1165264A1/de
Application granted granted Critical
Publication of EP1165264B1 publication Critical patent/EP1165264B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)
EP00926785A 1999-04-07 2000-03-31 Werkzeughaltevorrichtung für abkantbiegepressen Expired - Lifetime EP1165264B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT1999RE000039A IT1309745B1 (it) 1999-04-07 1999-04-07 Attrezzatura portautensili ad elementi modulari per presse piegatrici.
ITRE990039 1999-04-07
PCT/EP2000/002857 WO2000059655A1 (en) 1999-04-07 2000-03-31 Tool holding fixture for bending brakes

Publications (2)

Publication Number Publication Date
EP1165264A1 true EP1165264A1 (de) 2002-01-02
EP1165264B1 EP1165264B1 (de) 2003-05-21

Family

ID=11399412

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00926785A Expired - Lifetime EP1165264B1 (de) 1999-04-07 2000-03-31 Werkzeughaltevorrichtung für abkantbiegepressen

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)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7152453B2 (en) * 2004-02-13 2006-12-26 Wilson Tool International, Inc. Press brake tool and tool holder
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
AT520943B1 (de) 2018-02-21 2019-09-15 Trumpf Maschinen Austria Gmbh & Co Kg Fertigungsanlage mit Werkzeugwechseleinheit und Klemmbacke sowie Verfahren zum Werkzeugwechsel
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

Family Cites Families (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
DE8621639U1 (de) * 1986-08-12 1986-10-02 EHT Werkzeugmaschinen GmbH, 79331 Teningen Werkzeughalter insbesondere für eine Gesenkbiegepresse od.dgl.
NL8802402A (nl) * 1988-09-29 1990-04-17 Wila Maschf Bv Kleminrichting, bijv. voor het bovengereedschap van een kantpers.
NL9100034A (nl) * 1991-01-10 1992-08-03 Wila Maschf Bv Kantpersgereedschap, en een adaptor en een kantpers daarvoor.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0059655A1 *

Also Published As

Publication number Publication date
IT1309745B1 (it) 2002-01-30
ATE240798T1 (de) 2003-06-15
DE60002845T2 (de) 2004-01-22
AU4541300A (en) 2000-10-23
WO2000059655A1 (en) 2000-10-12
ITRE990039A1 (it) 2000-10-07
ITRE990039A0 (it) 1999-04-07
DE60002845D1 (de) 2003-06-26
ES2195888T3 (es) 2003-12-16
EP1165264B1 (de) 2003-05-21

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