EP0340167A3 - Method of bending work pieces - Google Patents

Method of bending work pieces Download PDF

Info

Publication number
EP0340167A3
EP0340167A3 EP19890810290 EP89810290A EP0340167A3 EP 0340167 A3 EP0340167 A3 EP 0340167A3 EP 19890810290 EP19890810290 EP 19890810290 EP 89810290 A EP89810290 A EP 89810290A EP 0340167 A3 EP0340167 A3 EP 0340167A3
Authority
EP
European Patent Office
Prior art keywords
bending
workpiece
angle
bending angle
bent
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.)
Withdrawn
Application number
EP19890810290
Other languages
German (de)
French (fr)
Other versions
EP0340167A2 (en
Inventor
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 EP0340167A2 publication Critical patent/EP0340167A2/en
Publication of EP0340167A3 publication Critical patent/EP0340167A3/en
Withdrawn legal-status Critical Current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
    • B21D5/0209—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

Beim Verfahren zum Biegen eines Werkstückes nach einem gegebe­ nen Biegewinkel wird das Werkstück zunächst nach einem etwas grösseren Winkel gebogen als der gegebene Endbiegewinkel, wor­ auf durch eine Entlastung des Biegestempels (5) die Entspannung des vorgebogenen Werkstückes (14) erfolgt. Danach wird der Be­ trag der Rückfederung durch Messung des effektiven Biegewinkels nach der ersten Biegeoperation ermittelt. Nun wird der Matri­ zenboden (22) derart verstellt, dass bei der nachfolgenden, zweiten Biegeoperation ein Biegewinkel resultieren würde, der dem gegebenen Endbiegewinkel minus dem Betrag der Rückfederung entspricht. Nach der Entlastung des Werkstückes nach der zwei­ ten Biegeoperation wird das Werkstück derart zurückfedern, dass es genau den erwünschten Endbiegewinkel besitzt. In the process of bending a workpiece after a given one The workpiece is first bent slightly after a bent larger angle than the given final bending angle, wor on relaxation by relieving the bending punch (5) of the pre-bent workpiece (14). Then the Be resilience by measuring the effective bending angle determined after the first bending operation. Now the Matri zenboden (22) adjusted so that in the subsequent second bending operation would result in a bending angle that the given final bending angle minus the amount of springback corresponds. After relieving the workpiece after the two The bending operation will spring back the workpiece in such a way that it has exactly the desired end bending angle.

EP19890810290 1988-04-25 1989-04-18 Method of bending work pieces Withdrawn EP0340167A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1046/88 1988-04-25
AT0104688A AT390575B (en) 1988-04-25 1988-04-25 METHOD FOR BENDING A WORKPIECE

Publications (2)

Publication Number Publication Date
EP0340167A2 EP0340167A2 (en) 1989-11-02
EP0340167A3 true EP0340167A3 (en) 1990-10-24

Family

ID=3505415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890810290 Withdrawn EP0340167A3 (en) 1988-04-25 1989-04-18 Method of bending work pieces

Country Status (4)

Country Link
US (1) US4966029A (en)
EP (1) EP0340167A3 (en)
JP (1) JP2694617B2 (en)
AT (1) AT390575B (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH072088Y2 (en) * 1988-11-15 1995-01-25 株式会社小松製作所 Tool position controller for bending machine
US5365767A (en) * 1992-03-23 1994-11-22 Steelcase Inc. Brake press arrangement
US5408858A (en) * 1994-01-24 1995-04-25 Amada Engineering & Service Co., Inc. Bending machine utilizing controlled expandable pressure device to apply uniform pressure to work material
WO1996001706A1 (en) * 1994-07-08 1996-01-25 Amada Company, Limited Method for bending with press brake and press brake for use therein
DE19519108C2 (en) * 1995-05-24 1999-03-25 Knupfer Metallverarb Gmbh Method and device for measuring angles, in particular bending angles of sheet metal parts
US6026573A (en) * 1997-05-14 2000-02-22 Dana Corporation Method for manufacturing a side rail for a vehicle frame assembly
IT1311827B1 (en) * 1999-04-16 2002-03-19 Luciano Gasparini SELF-CENTERING TILTING FORK OF THE FORK, PARTICULARLY FOR MEASURING ON FOUR POINTS OF THE
EP1539394B1 (en) * 2002-05-08 2013-03-06 Avure Technologies AB Device and method for expansion forming
US20070056348A1 (en) * 2005-09-09 2007-03-15 David Leland Brake punch inserts
AT512465B1 (en) * 2012-02-10 2014-01-15 Trumpf Maschinen Austria Gmbh PRESSTISCH OR PRESSBALKEN WITH ADJUSTABLE BEAM ELEMENT
CN103406403B (en) * 2013-08-01 2015-05-13 江苏鹏诚钢构有限公司 Pressure flat bending device
CN104056881B (en) * 2013-10-17 2016-02-17 攀钢集团攀枝花钢铁研究院有限公司 Sheet metal bending apparatus
JP6846267B2 (en) * 2017-04-04 2021-03-24 株式会社アマダ Bending method of lower mold device and workpiece
EP3991869A4 (en) * 2019-06-28 2023-07-12 Kawasaki Jukogyo Kabushiki Kaisha Press brake, and method for operating press brake
CN117548532B (en) * 2024-01-11 2024-04-05 沈阳华铁异型材有限公司 Iron ladle strip bending device and bending method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2179958A1 (en) * 1972-04-13 1973-11-23 Haemmerle Ag Maschf Sheet metal working tool - with shock absorbing mounting to reduce tool damage
EP0096211A1 (en) * 1982-06-07 1983-12-21 Hämmerle AG Tool arrangement for a folding press
AT381251B (en) * 1984-10-18 1986-09-25 Haemmerle Ag METHOD FOR CORRECTING THE BENDING ANGLE WHEN BENDING WITH A BENDING STAMP

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3552182A (en) * 1968-11-20 1971-01-05 Wisconsin Machine Corp Press brake with hydraulic ram adjustment
US3760622A (en) * 1972-02-01 1973-09-25 I Mansell Elastomeric forming die
AT311152B (en) * 1972-04-13 1973-11-12 Haemmerle Ag Maschf Bending tool
JPS5311273B2 (en) * 1973-12-27 1978-04-20
US3978706A (en) * 1974-12-24 1976-09-07 Nippon Kokan Kabushiki Kaisha Precision bending work method for metallic materials
NL179349C (en) * 1975-06-24 Haemmerle Ag Maschf BENDING TOOL.
IT1072273B (en) * 1977-02-01 1985-04-10 Selecontrol Sas DEVICE FOR THE DETECTION AND ADJUSTMENT OF BENDING ANGLES PARTICULARLY SUITABLE FOR PRESSES-FOLDERS
JPS54417A (en) * 1977-06-03 1979-01-05 Hayashigumi Kk Method of construction of pressing in presssin pipe
DE2952108C2 (en) * 1979-12-22 1983-11-24 Hämmerle AG, Zofingen Arrangement for height adjustment of the die base of bending tools for bending sheet metal
JPS57202928A (en) * 1981-06-08 1982-12-13 Amada Co Ltd Bender
JPS5992120A (en) * 1982-11-15 1984-05-28 Hitachi Ltd Bending device
EP0166351A3 (en) * 1984-06-27 1986-09-17 Arnold Stucki Device at a machine for deformation work of sheet metals
JPS61129522A (en) * 1984-11-29 1986-06-17 Hitachi Ltd Bending angle detecting, correcting, and working method
JPS61229421A (en) * 1985-04-03 1986-10-13 Mitsubishi Heavy Ind Ltd Bending method for plate like body
US4802357A (en) * 1987-05-28 1989-02-07 The Boeing Company Apparatus and method of compensating for springback in a workpiece
US4864509A (en) * 1987-09-29 1989-09-05 The Boeing Company Method and related apparatus for controlling the operation of a press brake

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2179958A1 (en) * 1972-04-13 1973-11-23 Haemmerle Ag Maschf Sheet metal working tool - with shock absorbing mounting to reduce tool damage
EP0096211A1 (en) * 1982-06-07 1983-12-21 Hämmerle AG Tool arrangement for a folding press
AT381251B (en) * 1984-10-18 1986-09-25 Haemmerle Ag METHOD FOR CORRECTING THE BENDING ANGLE WHEN BENDING WITH A BENDING STAMP

Also Published As

Publication number Publication date
EP0340167A2 (en) 1989-11-02
US4966029A (en) 1990-10-30
JP2694617B2 (en) 1997-12-24
ATA104688A (en) 1989-11-15
AT390575B (en) 1990-05-25
JPH01313112A (en) 1989-12-18

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