EP0370956A3 - Method and apparatus for bending metal sheet sections - Google Patents

Method and apparatus for bending metal sheet sections Download PDF

Info

Publication number
EP0370956A3
EP0370956A3 EP19890810882 EP89810882A EP0370956A3 EP 0370956 A3 EP0370956 A3 EP 0370956A3 EP 19890810882 EP19890810882 EP 19890810882 EP 89810882 A EP89810882 A EP 89810882A EP 0370956 A3 EP0370956 A3 EP 0370956A3
Authority
EP
European Patent Office
Prior art keywords
bending
metal sheet
plungers
plunger
cylinder units
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
EP19890810882
Other languages
German (de)
French (fr)
Other versions
EP0370956A2 (en
EP0370956B1 (en
Inventor
Eduard Hänni
Vaclav Zbornik
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.)
Haemmerle AG Maschinenfabrik
Original Assignee
Haemmerle AG Maschinenfabrik
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 Haemmerle AG Maschinenfabrik filed Critical Haemmerle AG Maschinenfabrik
Publication of EP0370956A2 publication Critical patent/EP0370956A2/en
Publication of EP0370956A3 publication Critical patent/EP0370956A3/en
Application granted granted Critical
Publication of EP0370956B1 publication Critical patent/EP0370956B1/en
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
    • B21D5/0272—Deflection compensating 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

Abstract

The method of bending metal sheet sections is carried out with a bending punch and a bending die (27) which has an adjustable base (28). The die holder (26), with an elastic table plate (25) in between, rests on a number of plungers (13, 14), arranged side-by-side, of plunger-cylinder units (12, 13, 14) which can be individually pressure-loaded. Before the bending process, the plunger-cylinder units (12, 13, 14) are loaded with a pressure which is greater than the air-bending force required for the bending. As a result, the said plungers (13, 14) strike a stop (17). After the air bending is complete, the bending force increases and the plungers (13, 14) located in the area of the metal sheet section to be bent are forced back. The metal sheet section is uniformly shaped along the elastic line of the punch edge. Here, the two outermost plunger-cylinder units on the left and right strike stops which compensate for the metal sheet thickness lacking at these locations provided the metal sheet section to be worked is shorter than the length of the die. <IMAGE>
EP89810882A 1988-11-21 1989-11-20 Method and apparatus for bending metal sheet sections Expired - Lifetime EP0370956B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0284288A AT392023B (en) 1988-11-21 1988-11-21 METHOD FOR BENDING SHEET PIECES
AT2842/88 1988-11-21

Publications (3)

Publication Number Publication Date
EP0370956A2 EP0370956A2 (en) 1990-05-30
EP0370956A3 true EP0370956A3 (en) 1991-05-02
EP0370956B1 EP0370956B1 (en) 1993-09-08

Family

ID=3541164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810882A Expired - Lifetime EP0370956B1 (en) 1988-11-21 1989-11-20 Method and apparatus for bending metal sheet sections

Country Status (6)

Country Link
US (1) US5097694A (en)
EP (1) EP0370956B1 (en)
JP (2) JPH02160120A (en)
AT (2) AT392023B (en)
DE (1) DE58905534D1 (en)
ES (1) ES2043097T3 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0624411A1 (en) * 1993-05-13 1994-11-17 Hämmerle Ag Method of bending plates and press brake for carrying out the method
FR2708219B1 (en) * 1993-07-27 1995-10-20 Amada Europ Sa Process for compensating deformations of hydraulic press platforms, hydraulic platforms and presses thus equipped.
US5969973A (en) * 1994-11-09 1999-10-19 Amada Company, Ltd. Intelligent system for generating and executing a sheet metal bending plan
EP0841106A1 (en) * 1996-11-12 1998-05-13 Maru Kikai Kogyo Co., Ltd. Press brake
US20070056348A1 (en) * 2005-09-09 2007-03-15 David Leland Brake punch inserts
AT507809B1 (en) * 2009-01-27 2010-11-15 Trumpf Maschinen Austria Gmbh BENDING PEG WITH A MULTIPLE PRESSING BAR
NL2006854C2 (en) * 2011-05-26 2012-12-05 Wila Bv METHOD AND DEVICE FOR COMPENSATING DEVIATIONS IN A DEFORMING OPERATION BETWEEN TWO BARS OF A PRESS
AT512465B1 (en) * 2012-02-10 2014-01-15 Trumpf Maschinen Austria Gmbh PRESSTISCH OR PRESSBALKEN WITH ADJUSTABLE BEAM ELEMENT
CN116475307B (en) * 2023-04-23 2024-03-19 宝玛克(合肥)科技有限公司 Online hole flanging die for rolling part and application method of online hole flanging die

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3677009A (en) * 1970-11-12 1972-07-18 Kelso Marine Inc Control arrangement for the male die of a hydraulic press brake
FR2315334A1 (en) * 1975-06-24 1977-01-21 Haemmerle Ag Maschf BENDING TOOL
DE2714958A1 (en) * 1977-04-02 1978-10-05 Siempelkamp Gmbh & Co Hydraulic forming press for sheets of variable width - uses hydraulic flow monitor to feed computer for control of travelling cross beam
DE3245755A1 (en) * 1982-12-10 1984-06-14 Dorstener Maschinenfabrik Ag, 4270 Dorsten Method for correcting the bending line of the bending tool of a bending press, in particular a folding press

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2119528A5 (en) * 1970-12-25 1972-08-04 Amada Co Ltd
AT332703B (en) * 1974-05-27 1976-10-11 Haemmerle Ag Maschf WORK TABLE ON SHEET METAL WORKING MACHINES
AT343435B (en) * 1976-04-02 1978-05-26 Haemmerle Ag Maschf BENDING PRESS WITH WORK TABLE
DE2631292A1 (en) * 1976-07-12 1978-01-19 Bauer Guenter Bending machine for plates used in building construction - has channel section bending web hinged to fixed clamping beam
JPS54417A (en) * 1977-06-03 1979-01-05 Hayashigumi Kk Method of construction of pressing in presssin pipe
JPS59212121A (en) * 1983-05-17 1984-12-01 Amada Co Ltd Folding method in press brake
JPS6037195U (en) * 1983-08-19 1985-03-14 三洋電機株式会社 Electromagnetic cooker
GB2160799B (en) * 1984-03-30 1987-07-22 Amada Co Ltd A bending machine and a die changing system therefor
IT1204521B (en) * 1986-04-11 1989-03-03 Amada Co Ltd BENDING MACHINE FOR SHEETS
JPS63157800A (en) * 1987-11-06 1988-06-30 Amino Tekkosho:Kk Device for maintaining dynamic balance accuracy of slide in press machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3677009A (en) * 1970-11-12 1972-07-18 Kelso Marine Inc Control arrangement for the male die of a hydraulic press brake
FR2315334A1 (en) * 1975-06-24 1977-01-21 Haemmerle Ag Maschf BENDING TOOL
DE2714958A1 (en) * 1977-04-02 1978-10-05 Siempelkamp Gmbh & Co Hydraulic forming press for sheets of variable width - uses hydraulic flow monitor to feed computer for control of travelling cross beam
DE3245755A1 (en) * 1982-12-10 1984-06-14 Dorstener Maschinenfabrik Ag, 4270 Dorsten Method for correcting the bending line of the bending tool of a bending press, in particular a folding press

Also Published As

Publication number Publication date
EP0370956A2 (en) 1990-05-30
ATE94095T1 (en) 1993-09-15
AT392023B (en) 1991-01-10
DE58905534D1 (en) 1993-10-14
JPH08537U (en) 1996-03-26
EP0370956B1 (en) 1993-09-08
ES2043097T3 (en) 1993-12-16
US5097694A (en) 1992-03-24
JP2518512Y2 (en) 1996-11-27
JPH02160120A (en) 1990-06-20
ATA284288A (en) 1990-07-15

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