EP1961502A3 - Method and device for bending workpieces - Google Patents

Method and device for bending workpieces Download PDF

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Publication number
EP1961502A3
EP1961502A3 EP08405039.2A EP08405039A EP1961502A3 EP 1961502 A3 EP1961502 A3 EP 1961502A3 EP 08405039 A EP08405039 A EP 08405039A EP 1961502 A3 EP1961502 A3 EP 1961502A3
Authority
EP
European Patent Office
Prior art keywords
bending
workpiece
angle
punch
die
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
EP08405039.2A
Other languages
German (de)
French (fr)
Other versions
EP1961502A2 (en
EP1961502B1 (en
Inventor
Gerrit Gerritsen
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.)
Bystronic Laser AG
Original Assignee
Bystronic Laser AG
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Filing date
Publication date
Application filed by Bystronic Laser AG filed Critical Bystronic Laser AG
Publication of EP1961502A2 publication Critical patent/EP1961502A2/en
Publication of EP1961502A3 publication Critical patent/EP1961502A3/en
Application granted granted Critical
Publication of EP1961502B1 publication Critical patent/EP1961502B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B21D5/004—Bending sheet metal along straight lines, e.g. to form simple curves with program control
    • 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
    • B21D5/006—Bending sheet metal along straight lines, e.g. to form simple curves combined with measuring of bends

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

Es wird ein Verfahren zum Biegen von Werkstücken (20) mit Hilfe einer einen Biegestempel (5) sowie eine Matrize (13) umfassenden Biegevorrichtung (1) vorgeschlagen. Vor dem eigentlichen Biegevorgang wird zumindest eine Referenzbiegung durchgeführt, bei der während des Biegevorgangs verschiedene Biegewinkel zusammen mit der zugehörigen Eindringtiefe des Stempels (5) in die Matrize (13) sowie der Biegekraft erfasst werden. Zusätzlich wird für verschiedene Biegewinkel auch die Schenkellänge und/oder die Schenkellängenveränderung des Werkstücks (20) bestimmt und abgespeichert. Alternativ oder ergänzend kann auch noch der k-Faktor und der Biegeinnenradius für das Werkstück (20) berechnet und abgespeichert werden. Die erfassten Werte werden derart abgespeichert, dass bei nachfolgenden Biegevorgängen darauf zurückgegriffen werden kann, um die für einen bestimmten Sollbiegewinkel notwendige Eindringtiefe des Stempels (5) in die Matrize (13) zu berechnen. Zur Bestimmung des Biegewinkels wie auch der Schenkellänge ist die Biegevorrichtung mit einem Messsystem (16) ausgerüstet, das zumindest eine Lichtquelle sowie eine Kamera aufweist. Die Lichtquelle projiziert zur Bestimmung des Biegewinkels einen linienförmigen Lichtstrahl (17) derart auf das Werkstück (20), dass mittels einer Kamera die Lage der auf die Oberfläche des Werkstücks (20) gerichteten Linie gemessen und aufgrund des zwischen Licht und Kameraachse eingeschlossenen Winkels der Biegewinkel berechnet werden kann.

Figure imgaf001
A method for bending workpieces (20) by means of a bending device (1) comprising a bending punch (5) and a die (13) is proposed. Before the actual bending operation, at least one reference bend is performed, during which different bending angles are detected together with the associated penetration depth of the punch (5) into the die (13) and the bending force during the bending process. In addition, the leg length and / or the leg length change of the workpiece (20) is determined and stored for different bending angles. Alternatively or additionally, the k-factor and the bending inner radius for the workpiece (20) can also be calculated and stored. The detected values are stored in such a way that subsequent bending processes can be used to calculate the penetration depth of the punch (5) into the die (13) which is necessary for a specific desired bending angle. To determine the bending angle as well as the leg length, the bending device is equipped with a measuring system (16) which has at least one light source and a camera. To determine the bending angle, the light source projects a line-shaped light beam (17) onto the workpiece (20) in such a way that the position of the line directed onto the surface of the workpiece (20) is measured by means of a camera and due to the angle of the bending angle enclosed between the light and the camera axis can be calculated.
Figure imgaf001
EP20080405039 2007-02-23 2008-02-14 Method and device for bending workpieces Active EP1961502B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH3112007 2007-02-23

Publications (3)

Publication Number Publication Date
EP1961502A2 EP1961502A2 (en) 2008-08-27
EP1961502A3 true EP1961502A3 (en) 2013-09-11
EP1961502B1 EP1961502B1 (en) 2014-10-22

Family

ID=38229057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080405039 Active EP1961502B1 (en) 2007-02-23 2008-02-14 Method and device for bending workpieces

Country Status (2)

Country Link
EP (1) EP1961502B1 (en)
PT (1) PT1961502E (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT508357B1 (en) 2009-06-29 2011-01-15 Trumpf Maschinen Austria Gmbh METHOD AND DEVICE FOR LASER-ASSISTED BENDING OF WORKPIECES
AT508356B1 (en) * 2009-06-29 2011-01-15 Trumpf Maschinen Austria Gmbh DEVICE AND METHOD FOR BENDING A WORKPIECE
AT508355B1 (en) * 2009-06-29 2011-01-15 Trumpf Maschinen Austria Gmbh METHOD AND DEVICE FOR BENDING A WORKPIECE
US8683834B1 (en) * 2009-07-16 2014-04-01 Robert Macaulay Determining and exporting K-factors and bend allowance based on measured bend radius
AT508857B1 (en) * 2009-10-14 2011-07-15 Trumpf Maschinen Austria Gmbh METHOD FOR DETERMINING THE THICKNESS OF A WORKPIECE WITH A BENDING MACHINE
DE102010009811B4 (en) 2010-03-02 2013-05-16 Mtu Aero Engines Gmbh Bending device for bending a blade of a blade ring
ES2694144T3 (en) 2012-10-12 2018-12-18 Nivora Ip B.V. System and measurement method to measure an angle
AT515671B1 (en) * 2014-06-23 2015-11-15 Trumpf Maschinen Austria Gmbh Bending angle measuring device for a bending press
CN104942045A (en) * 2015-06-24 2015-09-30 苏州边桐传感科技有限公司 Bending processing device based on pressure inductive control
CN104942076A (en) * 2015-06-25 2015-09-30 苏州边桐传感科技有限公司 Sheet metal bending system and method with angle regulating and controlling function and phased bending function
AT520563B1 (en) * 2017-12-22 2019-05-15 Trumpf Maschinen Austria Gmbh & Co Kg Determination of the bending shortening of a sheet metal workpiece to be bent
CN108941261B (en) * 2018-06-06 2020-06-26 中山市特达机械科技有限公司 Steel plate bending device
CN109500156B (en) * 2018-12-28 2023-06-20 天津航天长征火箭制造有限公司 Bending forming device and method for inner grid wall plate with high rib thickness ratio
AT523360B1 (en) * 2019-12-19 2022-05-15 Trumpf Maschinen Austria Gmbh & Co Kg Bending machine and control device
CN112536344B (en) * 2020-11-03 2023-04-07 江苏威莱特科技有限公司 Panel angle control system of bending
CN114309149B (en) * 2022-01-05 2024-02-02 河北省送变电有限公司 Real-time sensing device and real-time sensing method for bending angle of power transmission tower plate

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4564765A (en) * 1982-04-29 1986-01-14 Karl Mengele & Sohne Gmbh & Co. Optoelectronic method and apparatus for measuring the bending angle of materials
JPS6321505A (en) * 1986-07-16 1988-01-29 Amutetsuku:Kk Clinometer
EP1398094A1 (en) * 2002-09-11 2004-03-17 Trumpf Werkzeugmaschinen GmbH + Co. KG Method and device for determining the arm length of bent products
DE102005012384A1 (en) * 2005-03-17 2006-07-13 Siemens Ag Free bending of workpiece such as sheet useful in sheet bending operations involves construction of bending and correction curves and application of the corrections to further bending

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT389829B (en) 1988-05-03 1990-02-12 Haemmerle Ag METHOD FOR BENDING SHEET PIECES WITH THE AID OF A BENDING DEVICE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4564765A (en) * 1982-04-29 1986-01-14 Karl Mengele & Sohne Gmbh & Co. Optoelectronic method and apparatus for measuring the bending angle of materials
JPS6321505A (en) * 1986-07-16 1988-01-29 Amutetsuku:Kk Clinometer
EP1398094A1 (en) * 2002-09-11 2004-03-17 Trumpf Werkzeugmaschinen GmbH + Co. KG Method and device for determining the arm length of bent products
DE102005012384A1 (en) * 2005-03-17 2006-07-13 Siemens Ag Free bending of workpiece such as sheet useful in sheet bending operations involves construction of bending and correction curves and application of the corrections to further bending

Also Published As

Publication number Publication date
EP1961502A2 (en) 2008-08-27
PT1961502E (en) 2014-11-06
EP1961502B1 (en) 2014-10-22

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