EP0039322A1 - Dispositif à plier des feuilles de tôle - Google Patents

Dispositif à plier des feuilles de tôle Download PDF

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Publication number
EP0039322A1
EP0039322A1 EP81890048A EP81890048A EP0039322A1 EP 0039322 A1 EP0039322 A1 EP 0039322A1 EP 81890048 A EP81890048 A EP 81890048A EP 81890048 A EP81890048 A EP 81890048A EP 0039322 A1 EP0039322 A1 EP 0039322A1
Authority
EP
European Patent Office
Prior art keywords
crank arm
lever
articulation point
bending
cylinder
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
EP81890048A
Other languages
German (de)
English (en)
Other versions
EP0039322B1 (fr
Inventor
Hans Aschauer
Günter Funk
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.)
Cessione salvagnini Transferica SpA
Original Assignee
Voestalpine AG
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 Voestalpine AG filed Critical Voestalpine AG
Publication of EP0039322A1 publication Critical patent/EP0039322A1/fr
Application granted granted Critical
Publication of EP0039322B1 publication Critical patent/EP0039322B1/fr
Expired legal-status Critical Current

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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
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B21D5/045—With a wiping movement of the bending blade

Definitions

  • the invention relates to a device for folding sheet metal plates with at least one drivable bending tool which interacts with a counter tool.
  • an upper and a lower bending tool are provided, these bending tools being arranged on the opposite legs of a cross-sectionally C-shaped support and with this support in the vertical direction relative to a pair can be adjusted by counter tools that also serve to clamp the workpiece. Because of the linear drive movement of the bending tools, comparatively high bending forces have to be applied in this known device. More serious, however, is the disadvantage that due to the C-shaped tool carrier in cross section and its vertical drive movement, only certain bending angles can be achieved. The possible design of the workpiece is therefore limited.
  • the invention is therefore based on the object to avoid these deficiencies and to improve a device for folding metal sheets of the type described in such a way that the bending tool is moved in accordance with the desired workpiece shape in an advantageous manner relative to the counter tool, in order to achieve the end with low bending forces to be able to find and on the other hand to ensure extensive freedom with regard to the shaping of the workpiece.
  • the invention solves this problem in that the bending tool can be driven with the aid of a four-bar linkage, which comprises two crank arms mounted in a frame and a coupling connecting the crank arms and carrying the bending tool, and an actuator for displacing the articulation point of a crank arm on the frame or for changing the length a crank arm.
  • a four-bar linkage which comprises two crank arms mounted in a frame and a coupling connecting the crank arms and carrying the bending tool, and an actuator for displacing the articulation point of a crank arm on the frame or for changing the length a crank arm.
  • the decisive advantage is achieved with simple constructional means that the usual working movement of the bending tool, given by the coupling movement, results in this working movement in essential transverse drive movement can be superimposed so that the tool path can be adapted to the most varied bending angles and bending radii.
  • this ensures that the bending tool can always be moved transversely to the workpiece, which ensures a favorable introduction of the bending forces over the entire bending angle. The bending forces can thus be kept comparatively small.
  • the bending tool In the majority of the bends that occur, the bending tool is first moved transversely to the surface of the sheet metal strip to be bent and then must be adjusted in an inclined path in accordance with the desired bending angle, it being sufficient to divide the working movement of the bending tool into two sections, one for the Bend or have the finished bending advantageous course. In a further embodiment of the invention, this can be achieved simply by actuating the actuator for moving the articulation point or for changing the length of one crank arm as a function of the rotational position of the other, drivable crank arm.
  • a bending path composed of two sections for the bending tool cannot produce larger bending angles under the same favorable conditions.
  • a web section for bending and finishing the folding but also a web section for a central area will be required.
  • such a three-part movement path for the bending tool can be realized in that the crank arm, which is adjustable in terms of its articulation point or its length, is adjusted by the other crank arm via the actuating drive after reaching a stop-limited end position.
  • the quadrilateral joint is thus driven exclusively in the sense of a transverse movement of the bending tool, so that the last path section of the bending tool actually runs transverse to the first path section, while the middle path section assumes an intermediate inclination.
  • crank arm in this regard is designed as an actuating cylinder.
  • other constructive solutions are also possible, but these are more complex.
  • the crank arm can be articulated on a lever which is rotatably mounted in the frame in order to shift its articulation point.
  • this lever only has to be pivoted accordingly in order to obtain the desired displacement of the articulation point.
  • the articulation point for the lever forming a crank arm can be designed with two arms and cooperate with a driving lever connected to the other crank arm .
  • the articulation point for the lever forming a crank arm need only be adjusted with the aid of a cylinder if the drive for the other crank arm is switched off, for example by a stop has been.
  • Such an actuating cylinder for the lever used to displace the articulation point may of course be driven by the lever do not hinder the driving lever of the driven crank arm, which could be achieved, for example, by venting this actuating cylinder.
  • this displacement guide for the actuating cylinder can simply be designed as a support cylinder arranged in series with the actuating cylinder. This support cylinder is ventilated during the drive of the lever for displacing the articulation point via the driving lever and is then held in its stroke position by blocking the pressure medium supply and discharge.
  • the tool path depended either only on the usual drive of the four-bar linkage via a crank arm or only on the adjustment of the four-bar linkage by the displacement of the articulation point of a crank arm.
  • it must be possible to interrupt the drive connection between the driver lever of the driven crank arm and the lever for moving the articulation point.
  • the driver lever can be freely moved past the lever for the displacement of the articulation point by a corresponding adjustment of the transmission body, which results in the desired interruption of the drive connection.
  • it can be connected to a cylinder.
  • this measure has the advantage that the support cylinder can be ventilated as a function of the pressure applied to the cylinder interacting with the transmission body.
  • the resulting load on the lever for displacing the articulation point ensures that the bending tool cannot be pushed out of its predetermined path due to the resilient restoring forces of the workpiece after the articulation point displacement has been released.
  • the possibility of movement of the lever for the displacement of the articulation point is only released when the driver lever presses firmly against this lever.
  • the illustrated device for folding sheet metal has a frame 1, in the side walls of which the bending tools 2 and 3 are mounted via four-bar linkages 4.
  • the crank arms 5 and 6 are made from laterally arranged handlebars or the like, so that a free, unobstructed passage between the coupling 7 for the sheet metal plate 8 to be processed is guaranteed iaL.
  • Hydraulic cylinders 9, which are on the one hand on the frame 1 and on the other hand, serve to drive the four-bar linkage 4 are articulated on a radial arm 10 which can be rotated with the crank arm 5 of the four-bar linkage 4 about an axis 11 until the radial arm 10 strikes a stop 12 fixed to the frame, as shown for the upper bending tool 2 in FIG. 2.
  • crank arm 6 is not mounted in the frame 1, but rather on a lever 14 which is seated on a shaft 15 rotatably held in the frame 1.
  • the lever 14 is designed with two arms, a drive connection being able to be established between the lever arm 16 and a driving lever 17 assigned to the crank arm 5 via a transmission body 18 which is adjustable relative to the lever arm 16.
  • the driver lever 17 strikes the transmission body 18 after a corresponding rotary adjustment of the crank arm 5 and pivots the lever 14 in accordance with the given transmission ratios.
  • the additional displacement of the articulation point 13 of the crank arm 6 causes a change in the path of movement for the bending tool 2.
  • the bending tool covers a path corresponding to the coupling movement via the crank arm 5, which is designated in Fig. 4 with 20, this web 20 superimposed by the pivoting of the lever 14 transverse movement, so that by pivoting the lever 14, the bending tool 2 from the position shown in phantom in Fig.
  • the ones from Bending tool 2 covered path is designated 21.
  • the bending tool 2 can thus be moved along two path sections 20 and 21, which first cause the sheet metal plate 8 clamped between two holders 22 serving as counter-tools to be bent into the dot-dash position and then to finish bending with a modified path of movement.
  • the bending forces exerted by the bending tool 2 on the sheet 8 therefore always act in a favorable manner on the sheet, so that the comparatively small bending forces are sufficient.
  • an additional possibility of movement for the bending tool is required, as shown in FIG. 5, in a direction transverse to the movement path 20.
  • This additional possibility of movement of the bending tool can be achieved by simply adjusting the crank arm 6 via the lever 14.
  • the shaft 15 is articulated via an arm 23 to an actuating cylinder 24 which, when subjected to a corresponding action, pivots the lever 14 further when the radial arm 10 abuts the stop 12 and the drive for the crank arm 5 is thereby interrupted.
  • the crank arm 5 is held in place, the rotary movement of the lever 14 results in a transverse movement for the bending tool, as is indicated in FIG. 5 by the track section 25.
  • the bending angles can therefore be freely selected in a wide range.
  • the actuating cylinder 24 is therefore not articulated to the frame 1, but via a support cylinder 26 which is in series with the actuating cylinder 24 and is connected to it in a manner such that it cannot move. If the support cylinder 26 is ventilated, the displaceable support of the actuating cylinder 24 is ensured due to the free displaceability of its piston. When the cylinder 26 is locked by closing the pressure medium lines, there is a firm support for the actuating cylinder 24, so that the arm 23 and the shaft 15 can be pivoted.
  • transition points between the individual movement path sections 20, 21 and 25 can be clearly predetermined by the stop of the driving lever 17 on the lever arm 16 of the lever 14 and by the stop of the radial arm 10 on the stop 12.
  • the movement paths of the bending tools can therefore also be adapted precisely to certain conditions.
  • the support cylinder 26 needs to be determined in its stroke position, which can be done simply by shutting off the pressure medium lines. If the support cylinder 26 is ventilated in an uncontrolled manner when the driving lever 17 strikes the transmission body 18 of the lever arm 16, the bending tool may give way under certain circumstances due to the resilient restoring forces of the partially bent edge strip of the metal sheet 8. This yielding can be effectively suppressed if the support cylinder 26 is ventilated as a function of the application pressure of the cylinder 19 interacting with the transmission body 18. The support cylinder 26 is therefore only released when a corresponding force from the driving lever 17 acts on the lever arm 16, which consequently no longer counteracts the drive can move meaningfully.
  • the cylinder 19 also allows the transmission body 18 to be withdrawn from the movement path of the driving lever 17, so that the path section 21 can be skipped. This ensures an even greater freedom with regard to the shape of the metal sheets 8 to be folded.
  • the bending tools 2 and 3 not only work together with the brackets 22 that clamp the metal sheets 8 to be bent, but if the bending tools 2 and 3 are used for a common bending process, grooves or folds can also be bent, as shown in FIGS. 6 and 7 is shown.
  • a groove is produced in the metal sheet 8 according to FIG. 6, the bending tool 3 not being used as a counter-tool for the bending tool 2, but the bending tool 3.
  • the sheet 8 is not bent back around a counter tool, but freely, which is only possible if one of the two bending tools can take over the task of a holder for the sheet. Due to the movement possibilities of the bending tools 2 and 3, this is easily possible, so that folds can also be bent.
  • crank arm 6 can be changed in length by means of an actuator.
  • the crank arm 6 consists of an actuating cylinder 27 which again the coupling 7 can be provided on both sides.
  • the bending tool 2 is forced in a comparable manner to a movement component which runs essentially transversely to the movement path which is caused solely by the drive of the four-bar linkage 4 via the crank arm 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP81890048A 1980-04-24 1981-03-16 Dispositif à plier des feuilles de tôle Expired EP0039322B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0220380A AT363757B (de) 1980-04-24 1980-04-24 Vorrichtung zum abkanten von blechtafeln
AT2203/80 1980-04-24

Publications (2)

Publication Number Publication Date
EP0039322A1 true EP0039322A1 (fr) 1981-11-04
EP0039322B1 EP0039322B1 (fr) 1983-10-12

Family

ID=3529912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81890048A Expired EP0039322B1 (fr) 1980-04-24 1981-03-16 Dispositif à plier des feuilles de tôle

Country Status (8)

Country Link
US (1) US4411148A (fr)
EP (1) EP0039322B1 (fr)
JP (1) JPS56168913A (fr)
AR (1) AR228054A1 (fr)
AT (1) AT363757B (fr)
BR (1) BR8102468A (fr)
DE (1) DE3161151D1 (fr)
MX (1) MX152290A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000766A1 (fr) * 1983-08-02 1985-02-28 Joseph Rhodes Limited Ameliorations a des plieuses
EP0353680A2 (fr) * 1988-08-03 1990-02-07 Rolf Nagel Dispositif pour obtenir des rebords de tôle par pliage
EP0418114A2 (fr) * 1989-09-11 1991-03-20 Toolsystem Oy Appareil et procédé de pliage de tôles minces
FR2686276A1 (fr) * 1992-01-20 1993-07-23 Dimeco Alipresse Plieuse pour flans metalliques.
DE4209259A1 (de) * 1992-03-21 1993-09-23 Anton Rappl Biegevorrichtung
NL1000459C2 (en) * 1995-05-31 1996-12-03 Cornelis Hendricus Liet Device for bending metal sheet
EP0745442A1 (fr) * 1995-05-31 1996-12-04 Cornelis Hendricus Liet Appareil pour plier de la tÔle
WO2000043140A1 (fr) * 1999-01-19 2000-07-27 Reinhardt Maschinenbau Gmbh Cintreuse
EP1057547A1 (fr) * 1999-05-27 2000-12-06 SALVAGNINI ITALIA S.p.A. Outil de cintrage et de pliage pour une plieuse et plieuse utilisant cet outil
CN1295478C (zh) * 1999-10-26 2007-01-17 利乐拉瓦尔集团及财务有限公司 管式换热器中的一种布置方式
CN108698102A (zh) * 2016-02-18 2018-10-23 澳尔玛公司 镶板机床的弯曲组件

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4590784A (en) * 1984-07-27 1986-05-27 Nippon Kokan Kabushiki Kaisha Press brake
JPH0685941B2 (ja) * 1986-08-29 1994-11-02 株式会社アマダ 折曲げ機械
JPH0685942B2 (ja) * 1986-08-29 1994-11-02 株式会社アマダ 折曲げ機械
US5083355A (en) * 1990-04-30 1992-01-28 Utica Enterprises, Inc. Hemming apparatus
JPH06226354A (ja) * 1993-01-29 1994-08-16 Amada Co Ltd 板材折曲げ加工装置
IT1292259B1 (it) * 1997-04-15 1999-01-29 Antonio Codatto Pressa piegatrice per lamiere.
US7258030B2 (en) * 2003-01-21 2007-08-21 Syron Engineering & Manufacturing, Llc Failsafe element for rotary cam unit used in a flanged die
ATE505274T1 (de) * 2003-02-06 2011-04-15 Kyowa Machine Co Ltd Plattenbiegemaschine
US7622066B2 (en) * 2004-07-26 2009-11-24 The Boeing Company Methods and systems for manufacturing composite parts with female tools
US7306450B2 (en) * 2004-09-29 2007-12-11 The Boeing Company Apparatuses, systems, and methods for manufacturing composite parts
ES2322594T3 (es) * 2004-10-22 2009-06-23 Finn-Power Oy Sistema cinematico para el desplazamiento de unidades de trabajo de maquinas para doblar y conformar chapas metalicas.
US8557165B2 (en) 2008-10-25 2013-10-15 The Boeing Company Forming highly contoured composite parts
US7527759B2 (en) * 2005-04-13 2009-05-05 The Boeing Company Method and apparatus for forming structural members
US8601694B2 (en) 2008-06-13 2013-12-10 The Boeing Company Method for forming and installing stringers
EP1777017A1 (fr) * 2005-10-21 2007-04-25 Arcelor Steel Service Centres Dispositif de pliage à bras de pliage positif et négatif indépendants
US7655168B2 (en) * 2006-01-31 2010-02-02 The Boeing Company Tools for manufacturing composite parts and methods for using such tools
JP5233682B2 (ja) * 2009-01-08 2013-07-10 アイシン・エィ・ダブリュ株式会社 曲げ加工機
ITVR20110061A1 (it) * 2011-03-30 2012-10-01 Finn Power Italia S R L Meccanismo di movimentazione per struttura portalame di macchina pannellatrice per l'esecuzione di piegature su fogli di lamiera metallica
ITVR20110232A1 (it) * 2011-12-22 2013-06-23 Finn Power Italia S R L Meccanismo di movimentazione a motori indipendenti per gruppo portalame di macchina pannellatrice
DE102012210960B4 (de) * 2012-06-27 2024-02-29 Bayerische Motoren Werke Aktiengesellschaft Füllschieberanordnung für ein pressengebundenes Blechbearbeitungswerkzeug und pressengebundenes Blechbearbeitungswerkzeug mit solcher Füllschieberanordnung
CN117324438B (zh) * 2023-12-01 2024-02-06 广东铝享家家居有限公司 一种铝制柜体弧形件折弯机

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB584575A (en) * 1945-01-04 1947-01-17 Norman Isherwood And Company L Improvements in crimping machines
GB958671A (en) * 1960-08-31 1964-05-21 British Federal Welder Clinching apparatus
DE1909623U (de) * 1964-12-05 1965-02-11 British Fed Welder And Machine Boerdel- bzw. falzvorrichtung.
FR1432302A (fr) * 1965-05-05 1966-03-18 Steelweld Ltd Presse à plier les pièces en tôle
DE1923675A1 (de) * 1968-10-04 1970-04-30 Willi Mueller Abkantmaschine
DE2614177A1 (de) * 1975-04-16 1976-10-28 Andre Lamendour Vorrichtung zum biegen von blechen
DE2839978A1 (de) * 1977-09-19 1979-03-29 Salvagnini Transferica Spa Maschine zur herstellung von rechteckigen blechteilen mit gebogenen kanten
DE2825591A1 (de) * 1977-11-14 1979-05-17 Thalmann Konstruktionen Ag Biegemaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1135534A (en) * 1914-12-31 1915-04-13 Bliss E W Co Flanging device for sheet-metal blanks.
US3054437A (en) * 1960-01-29 1962-09-18 Laxo Ed Can body blank forming machine
US3561248A (en) * 1968-05-21 1971-02-09 Kawasaki Juko Kk Apparatus for forming curved metal bars as automobile bumpers
JPS5236270B2 (fr) * 1973-08-13 1977-09-14

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB584575A (en) * 1945-01-04 1947-01-17 Norman Isherwood And Company L Improvements in crimping machines
GB958671A (en) * 1960-08-31 1964-05-21 British Federal Welder Clinching apparatus
DE1909623U (de) * 1964-12-05 1965-02-11 British Fed Welder And Machine Boerdel- bzw. falzvorrichtung.
FR1432302A (fr) * 1965-05-05 1966-03-18 Steelweld Ltd Presse à plier les pièces en tôle
DE1923675A1 (de) * 1968-10-04 1970-04-30 Willi Mueller Abkantmaschine
DE2614177A1 (de) * 1975-04-16 1976-10-28 Andre Lamendour Vorrichtung zum biegen von blechen
DE2839978A1 (de) * 1977-09-19 1979-03-29 Salvagnini Transferica Spa Maschine zur herstellung von rechteckigen blechteilen mit gebogenen kanten
DE2825591A1 (de) * 1977-11-14 1979-05-17 Thalmann Konstruktionen Ag Biegemaschine

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000766A1 (fr) * 1983-08-02 1985-02-28 Joseph Rhodes Limited Ameliorations a des plieuses
GB2154165A (en) * 1983-08-02 1985-09-04 Rhodes Joseph Ltd Improvements in bending machines
US4658624A (en) * 1983-08-02 1987-04-21 Joseph Rhodes Limited Bending Machines
EP0353680A2 (fr) * 1988-08-03 1990-02-07 Rolf Nagel Dispositif pour obtenir des rebords de tôle par pliage
EP0353680A3 (en) * 1988-08-03 1990-11-28 Rolf Nagel Apparatus for producing plate flanges by bending
EP0418114A2 (fr) * 1989-09-11 1991-03-20 Toolsystem Oy Appareil et procédé de pliage de tôles minces
EP0418114A3 (en) * 1989-09-11 1991-04-17 Toolsystem Oy Apparatus and method for bending of thin sheet metals
FR2686276A1 (fr) * 1992-01-20 1993-07-23 Dimeco Alipresse Plieuse pour flans metalliques.
DE4209259A1 (de) * 1992-03-21 1993-09-23 Anton Rappl Biegevorrichtung
NL1000459C2 (en) * 1995-05-31 1996-12-03 Cornelis Hendricus Liet Device for bending metal sheet
EP0745442A1 (fr) * 1995-05-31 1996-12-04 Cornelis Hendricus Liet Appareil pour plier de la tÔle
US5743128A (en) * 1995-05-31 1998-04-28 Liet; Cornelis Hendricus Apparatus for bending metal sheet
WO2000043140A1 (fr) * 1999-01-19 2000-07-27 Reinhardt Maschinenbau Gmbh Cintreuse
US6427511B1 (en) 1999-01-19 2002-08-06 Reinhardt Maschinenbau Gmbh Bending machine
EP1057547A1 (fr) * 1999-05-27 2000-12-06 SALVAGNINI ITALIA S.p.A. Outil de cintrage et de pliage pour une plieuse et plieuse utilisant cet outil
US6470727B1 (en) 1999-05-27 2002-10-29 Salvagnini Italia S.P.A. Bending and squeezing blade for sheet metal bending and squeezing machine and machine utilizing the aforesaid blade
CN1295478C (zh) * 1999-10-26 2007-01-17 利乐拉瓦尔集团及财务有限公司 管式换热器中的一种布置方式
CN108698102A (zh) * 2016-02-18 2018-10-23 澳尔玛公司 镶板机床的弯曲组件

Also Published As

Publication number Publication date
US4411148A (en) 1983-10-25
JPH0117770B2 (fr) 1989-04-03
AT363757B (de) 1981-08-25
DE3161151D1 (en) 1983-11-17
MX152290A (es) 1985-06-21
AR228054A1 (es) 1983-01-14
BR8102468A (pt) 1982-01-05
JPS56168913A (en) 1981-12-25
ATA220380A (de) 1981-01-15
EP0039322B1 (fr) 1983-10-12

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