EP0067766A2 - Bombiereinrichtung eines Werkzeugträgers einer Abkantpresse oder dergleichen - Google Patents

Bombiereinrichtung eines Werkzeugträgers einer Abkantpresse oder dergleichen Download PDF

Info

Publication number
EP0067766A2
EP0067766A2 EP82401032A EP82401032A EP0067766A2 EP 0067766 A2 EP0067766 A2 EP 0067766A2 EP 82401032 A EP82401032 A EP 82401032A EP 82401032 A EP82401032 A EP 82401032A EP 0067766 A2 EP0067766 A2 EP 0067766A2
Authority
EP
European Patent Office
Prior art keywords
wedge
screw
transverse
tool holder
tool
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
EP82401032A
Other languages
English (en)
French (fr)
Other versions
EP0067766B1 (de
EP0067766A3 (en
Inventor
Pierre Cros
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.)
Promecam Sisson Lehmann SA
Original Assignee
Promecam Sisson Lehmann SA
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 Promecam Sisson Lehmann SA filed Critical Promecam Sisson Lehmann SA
Priority to AT82401032T priority Critical patent/ATE24128T1/de
Publication of EP0067766A2 publication Critical patent/EP0067766A2/de
Publication of EP0067766A3 publication Critical patent/EP0067766A3/fr
Application granted granted Critical
Publication of EP0067766B1 publication Critical patent/EP0067766B1/de
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
    • B21D5/02—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/309576—Machine frame
    • Y10T409/309744—Machine frame including means to compensate for deformation

Definitions

  • the present invention relates to a bending device of a tool holder of a press brake or the like.
  • a hydraulic press brake has a fixed deck and a movable deck, the fixed deck being supported at its two ends.
  • the movable deck is actuated by jacks which are most often located also at the two ends.
  • the cylinders provide the force necessary to bend the sheet and this, by reaction, causes the deformation of the two decks in the opposite direction.
  • the distance between the two decks therefore does not remain constant over their entire length during work, and this results in an irregularity in the folding angle, which is more open in the center than at the ends. As a result, the sheet is less folded in its central part than at its ends.
  • French patents 1,132,633, 1,362,471 and 1,539,817 provide for mounting jacks in the central part of the press, which makes it possible to obtain deformation curves of the aprons in the same direction and of the same importance, and therefore a regular and precise folding.
  • French patent n ° 2 347 992 (76 10 806) describes a press brake in which one of the aprons is composed of two parts, one of which is supported or actuated at its two ends, while the other part, on which the corresponding working tool is provided, is connected to this first part by one or two common axes arranged symmetrically with respect to the median transverse plane, and relatively close to this plane.
  • the apron produced in two parts may include prestressing means at its ends, which make it possible initially to give the active part of this apron, that is to say that carrying the working tool, a deformation in the same direction and substantially parallel to that undergone by the other deck, when it is subjected to the folding force.
  • French patent . 1 420 380 a system of shims arranged between one of the decks and the corresponding folding punch, these shims having a slope in the longitudinal direction of the tool and being individually adjustable, in order to obtain the desired bending curve.
  • French patent 2,078,874 provides for the use of a single wedge in the form of a sloping longitudinal bar, movable laterally by means of individually adjustable screws.
  • German patent 1 752 346 describes a bending device by means of a series of shims fixed on a support along the deck and bearing on conical surfaces, all these shims having a sloping face in the longitudinal direction of the tool, and which can be adjusted by a common mechanical device placed at one end of the row of shims.
  • Other embodiments provide hydraulic means for obtaining the bending of the tool, French patent 2,200,064 thus describing a press in which one of the tools is supported by several vertical hydraulic cylinders distributed over the length of the press and connected together in a closed hydraulic system.
  • the object of the invention is to produce a particularly simple bending device, which also makes possible a single control, either manual or motorized.
  • the means for controlling the deformation of the shim comprise, at each transverse thrust point, a hollow screw engaged in a socket integral with the tool holder so as to be able to be moved in translation in this socket, a member for fixing the screw to the block, a pinion mounted coaxially to the screw on a thread thereof, in order to be able to drive it in translation in the sleeve and a unique system for controlling the rotation of the assembly of pinions and consequently of the deformation of the entire wedge by the thrusts of the hollow screws on the wedge.
  • This unique long block is easily deformable and particularly simple to make. It follows that the control of the deformation of this wedge requires only a relatively small effort compared to the efforts required in the above-mentioned prior embodiments.
  • the pinion rotation control system comprises a chain engaged with all the pinions and actuated either manually by an end wheel, or by a motor capable of being controlled by a contactor or by program in the case of '' a digital press control.
  • the support member is a second fixed shim extending over the entire length of the tool holder and interposed between the first movable shim and the body of the corresponding deck, and the shims are pierced holes crossed by elements for fixing the tool holder to the body of the bulkhead, for example screws, the holes in the movable wedge being formed so as to reserve transverse play on either side of the fixing elements in order to authorize a transverse movement of the wedge on its support member.
  • the two wedges therefore have sloping faces bearing against one another, extending in the longitudinal direction of the machine, so that the transverse deformation of the movable wedge on the fixed wedge, allows obtaining '' an appropriate corresponding bending curve of the tool holder.
  • FIGs in Figures 1 and 2 show one; press brake comprising a fixed lower deck 1, and a movable upper deck 2, each carrying a folding tool, the deck 2 being slidably mounted on columns 3 and provided with actuating cylinders 4.
  • the jacks 4 develop the force necessary for bending a sheet, not shown, which causes reaction by deformation in the opposite direction of the decks 1 and 2. (Curves in phantom 5a and 5b). As a result, the distance between the latter does not remain constant over their entire length, which causes irregularities in the bending of the sheet.
  • the invention aims to print one of the tools of the press an initial bending, such as that shown by the curve 6 of deformation of the punch of the upper deck 2 ( Figure 2).
  • the bending device provided by the invention comprises a single wedge 7 (FIG. 5) extending over the entire length of one of the tool holders of the aprons, in the occurrence in this example, the lower apron 1 supporting a folding matrix not shown.
  • the wedge 7 is placed between a table 8 forming the tool holder of the folding die, and a support member 9 of the table 8, itself placed on the horizontal upper face 11 of the body of the lower deck 1.
  • the upper face of the wedge 7 is horizontal, while its lower face 7a has an inclination oC on the horizontal, and is placed in abutment on an inclined face 9a of the same slope of the fixed support wedge 9.
  • the inclinations of the lower face 7a and of the upper face 9a are oriented transversely relative to the plane of the body of the deck 1, and therefore to the longitudinal direction of the folding die.
  • the lower shim 9 has the same length as the sloping shim 7, these two shims as well as the upper part of the body of the deck 1 coming to fit into a corresponding housing of the tool holder 8.
  • the wedge 7 is pierced at different places with oblong holes 12 extending in the transverse direction, and which are crossed by elements for fixing the tool holder 8 to the body of the deck 1, constituted by screws 13.
  • the elongation of the holes 12 in the transverse direction reserve on either side of the screws 13 a clearance which allows transverse movement of the wedge 7 by sliding on its support member 9.
  • Each screw 13 thus passes through the table 8, the corresponding hole 12 and that of the fixed wedge 9 to be screwed into the body of the deck 1.
  • Elastic washers 14 are supported between the head of the screw 13 and the annular bottom 15 d '' a recess 16 formed in the table 8.
  • the ends of the wedge 7 are retained at two fixed points 17, between which the wedge 7 can be elastically deformed.
  • the means for exerting transverse thrusts on the wedge 7 comprise, at each thrust point, a hollow screw 18 with grooves 19 parallel to the axis of the screw 18 engaged in corresponding grooves a socket 21 integral with the tool holder 8, so that it can be moved in translation in this socket 21 without turning.
  • the hollow screw 18 is coupled to the wedge 7 by a screw 22 which can be introduced into the axial housing 18a of the screw 18 and screwed into the wedge 7.
  • the head of the screw 22 is suitably sized relative to the diameter of the housing 18a to be able to be introduced with sufficient clearance.
  • the screw 18 can be rotated by a threaded pinion 23, mounted coaxially with the screw 18 in a housing 24 of the table 8, on a corresponding thread 25 of the screw 18.
  • the pinion 23 can itself be rotated by a control system comprising a chain 26 meshing with the teeth 27 of the pinion 23, the rotation of which causes the screw 18 to slide in the socket 21 and consequently the sliding of the wedge 7 on the inclined ramp 9a. Consequently, depending on whether the chain 26 drives the pinion 23 in rotation in one direction or the other, the wedge wedge 7 slides by its inclined face 7a in one direction or the other on the wedge 9, which causes this place a corresponding bending of the table 8 and the folding tool.
  • control devices with screw 18 and pinion 23 of the wedge 7 are thus distributed along the latter, symmetrically on either side of its transverse axis XX, as can be seen in FIG. 5. All the pinions 23 are linked together by the single control chain 26 which can be driven manually by an end crank not shown, or by a motor, such as the motor 28 visible in FIG. 5.
  • the rotation of the pinions 23 allows the simultaneous advance of the screws 22 (the number of which is of course variable as a function of the length of the wedge 7), and therefore the thrust at as many corresponding points on the wedge wedge 7.
  • the motor 28 can be controlled, either by a contactor, or by program in the case of a digital control of the machine.
  • Program control is particularly interesting in that it allows automatic adjustment of the bending when the characteristics of the sheet to be bent and the tools used have been displayed.
  • the horizontal deformation of the wedge wedge 7 is carried out so that it slides by its sloping face 7a on the corresponding sloping face 9a of the wedge 9, progressively between the fixed points 17 of the ends and the machine center. As a result, the wedge 7 also deforms in the vertical plane.
  • the table 8 which is constantly resting on the wedge 7 thanks to the screws 13 and the elastic washers 14, deforms in the same way, as does the folding matrix placed on the table 8.
  • the initial adjustment of the bias wedge 7 makes it possible to compensate for the linearity faults of one or the other of the decks 1, 2, and to obtain a constant distance between them over their entire length.
  • the setting of the screws 18 against the wedge wedge 7 in its original position is done by extracting the grooved sleeve 21 and turning the screw 18 in the desired position. When this is reached, the sleeve 21 is returned to its position and locked in rotation.
  • the movable and deformable upper wedge 37 and its fixed support member 39 are formed by two identical parts extending from one end to the other of the tool holder (8 ).
  • the upper wedge 37 has a lower longitudinal surface 37a with variable slope conjugate with a corresponding longitudinal surface 39a of the fixed lower wedge 39, formed on the upper face thereof.
  • the shims 37 and 39 are pierced with holes, not shown to simplify the drawing, similar to the holes drilled in the shims 7 and 9, and into which the screws 13 penetrate.
  • the two surfaces with variable slope 37a, 39a are complementary so that when the shims 37, 39 are placed one on the other so as to apply one against the other surfaces 37a, 39a, the whole of the two wedges forms a regular parallelipiped, the respective vertical faces 40 and 41 of the wedges 37 to 39 being located in the same vertical plane.
  • Each of the surfaces 37a, 39a is defined by the grid shown in Figure 6 for the surface 39a.
  • the lines 43 to 49 are transverse lines on the surface 39a, extending from one end of the wedge 39 to its middle 0, through which the line 49 passes. More specifically, the lines 43 to 49 are the intersections of planes vertical parallel to each other, with the surface 39a, and it can be seen that the slope of the lines 43 to 49 on the horizontal increases progressively between the end of the wedge 39 and its center, from the value zero to the value alpha at the center of the hold. It is obviously the same between the straight line 49 and the other end of the wedge 39.
  • the movable and deformable shim 37 is placed in abutment on the shim 39 so that the surfaces with variable slope 37a, 39a are applied. one against the other at each of their points.
  • the wedge 37 When exerting transverse thrusts at different points of the wedge 37, by means of the devices of FIG. 4, the wedge 37 undergoes a transverse translation on the wedge 39, and due to the displacement of the surface 37a on the conjugate surface 39a , as well as under the effect of the screws 13 and the electric washers 14, the upper wedge 37 arches to form the desired upper bending 37b (FIG. 7).
  • the advantage of this embodiment consists in the fact that, to obtain the bending of the shim 37, it suffices to subject the latter to a transverse translation as a whole. This makes it possible to eliminate the fixed points at the ends of the wedge 37, and to exercise the transverse thrusts by all identical control members (screws 18 and pinions 23).
  • the invention is not limited to the embodiment described and may include variant embodiments.
  • the screws 18 can have multipan heads instead of the grooves 19, cooperating with corresponding multipan sections of the sockets 21.
  • a deformable shim such as 7 can also be mounted in the upper movable apron instead of the fixed lower apron.
  • the support member 9 can be an integral part of the body 1 and can be machined thereon.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Press Drives And Press Lines (AREA)
  • Braking Arrangements (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)
  • Electrically Operated Instructional Devices (AREA)
  • Adornments (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
EP82401032A 1981-06-16 1982-06-08 Bombiereinrichtung eines Werkzeugträgers einer Abkantpresse oder dergleichen Expired EP0067766B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82401032T ATE24128T1 (de) 1981-06-16 1982-06-08 Bombiereinrichtung eines werkzeugtraegers einer abkantpresse oder dergleichen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8111805 1981-06-16
FR8111805A FR2507507B1 (fr) 1981-06-16 1981-06-16 Dispositif de bombage d'un porte-outil d'une presse plieuse ou analogue

Publications (3)

Publication Number Publication Date
EP0067766A2 true EP0067766A2 (de) 1982-12-22
EP0067766A3 EP0067766A3 (en) 1984-02-22
EP0067766B1 EP0067766B1 (de) 1986-12-10

Family

ID=9259565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401032A Expired EP0067766B1 (de) 1981-06-16 1982-06-08 Bombiereinrichtung eines Werkzeugträgers einer Abkantpresse oder dergleichen

Country Status (10)

Country Link
US (1) US4449389A (de)
EP (1) EP0067766B1 (de)
JP (1) JPS583727A (de)
AT (1) ATE24128T1 (de)
BR (1) BR8203269A (de)
DE (1) DE3274625D1 (de)
ES (1) ES512791A0 (de)
FR (1) FR2507507B1 (de)
PT (1) PT75013B (de)
ZA (1) ZA823876B (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2525146A1 (fr) * 1982-04-16 1983-10-21 Canron Corp Dispositif de compensation de la flexion d'une poutre pour supporter un outil allonge en particulier pour presses a plier
FR2596319A1 (fr) * 1986-03-25 1987-10-02 Amada Co Ltd Appareil de bombage pour plieuse
FR2626802A1 (fr) * 1988-02-05 1989-08-11 Colly Ets A Table a bombe reglable pour presse plieuse, marbre ou autre similaire
EP0330258A1 (de) * 1988-02-24 1989-08-30 Cornelis Hendricus Liet Vorrichtung zum Wölben eines Biegepresswerkzeuges
NL8801808A (nl) * 1988-07-15 1990-02-01 Wila Maschf Bv Kantpers en bombeermiddelen daarvoor.
EP0404269A1 (de) * 1989-06-21 1990-12-27 Machinefabriek Wila B.V. Presse und automatische Kurvenherstellungsvorrichtung dafür
US5009098A (en) * 1989-11-27 1991-04-23 Machinefabriek Wila B.V. Press and curve-forming means therefor
US6725702B2 (en) 2001-10-26 2004-04-27 Ariel Financing Ltd. Apparatus and method for overcoming angular deviations in a workpiece
CN104841732A (zh) * 2015-05-29 2015-08-19 马鞍山市辰兴机械制造有限公司 一种能局部调节的折弯机挠度补偿工作台

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4573895A (en) * 1982-09-20 1986-03-04 Ptx-Pentronix, Inc. Adjustable die and punch assembly for compacting powder material
US4736612A (en) * 1987-02-17 1988-04-12 Power Brake Dies, Inc. Compensating die holder
IT1205097B (it) * 1987-06-25 1989-03-10 Salvagnini Transferica Spa Sistema di accoppiamento di una lama di piegatura al relativo supporto in una macchina piegatrice di fogli di lamiera
US4898015A (en) * 1988-07-18 1990-02-06 Houston David L Press brake deflection compensating device
CH680773A5 (de) * 1989-09-11 1992-11-13 Beyeler Machines Sa
DE4138286A1 (de) * 1991-11-21 1993-05-27 M & S Brugg Ag Presse
DE19736987A1 (de) * 1997-08-26 1999-03-11 Reinhardt Gmbh Maschbau Biegemaschine
US6164114A (en) * 1999-10-04 2000-12-26 Pelech, Jr.; Bruno J. Compensation device for a press brake
US6499330B1 (en) * 2000-09-11 2002-12-31 Bruno J. Pelech, Jr. Displacement indicator device for a press brake compensator
DE10245777A1 (de) * 2002-09-26 2004-04-08 Reinhardt Maschinenbau Gmbh Biegemaschine
US20040237623A1 (en) * 2003-05-29 2004-12-02 Russell Robert L. Compensating die holder
JP4497895B2 (ja) * 2003-11-10 2010-07-07 隆久 山本 脱着式金属板曲げ角度精度調整装置
US8443646B2 (en) * 2011-04-19 2013-05-21 Bruno J. Pelech Compensation device for a press brake
US10486217B2 (en) * 2017-04-25 2019-11-26 Stolle Machinery Company, Llc Unitary body swing lever
US11433445B2 (en) * 2017-04-25 2022-09-06 Stolle Machinery Company, Llc Unitary body swing lever
WO2019089054A1 (en) * 2017-11-06 2019-05-09 Hershberger Nelson Dwayne Bending machine
CN110625030B (zh) * 2019-10-09 2025-01-14 国网冀北电力有限公司廊坊供电公司 一种移动式钢绞线折弯夹紧组合工具

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR783147A (fr) * 1934-03-05 1935-07-08 Weingarten Vorm Hch Schatz Ag Plieuse-cintreuse
DE737550C (de) * 1938-05-01 1943-07-16 Sonntag G M B H R Blechbiegepresse
FR1132633A (fr) * 1955-09-05 1957-03-13 Promecam Soc Perfectionnements aux presses plieuses
FR1362471A (fr) * 1963-02-28 1964-06-05 Promecam Ets Perfectionnements aux presses plieuses
FR1420380A (fr) * 1964-05-22 1965-12-10 Promecan Sisson Lehmann Perfectionnements apportés aux presses plieuses
FR1539817A (fr) * 1967-07-26 1968-09-20 Promecam Sisson Lehmann Soc Machine hydraulique pour la déformation de métaux en feuilles
DE1752346C3 (de) * 1968-05-11 1974-09-12 Scharringhausen Maschinenbau Gmbh, 7526 Rheinsheim Bombiervorrichtung für eine Abkantpresse
DE2007259A1 (en) * 1970-02-18 1971-11-04 Fa. Sagita Tagolsheim, Oberelsaß (Frankreich) Adjusting wedge ledge for sheet metal fold-ing presses
FR2078874A5 (de) * 1970-02-18 1971-11-05 Sagita
FR2119528A5 (de) * 1970-12-25 1972-08-04 Amada Co Ltd
IT968136B (it) * 1972-09-14 1974-03-20 Piccini G Dispositivo idraulico di autocenti natura per presse di stampaggio come presse piegatrici e simili
DE2534664A1 (de) * 1975-08-02 1977-02-10 Fastenrath Fasti Werk Vorrichtung zum konvexen durchbiegen von werkzeugschienen an abkantpressen oder schwenkbiegemaschinen
FR2347992A1 (fr) * 1976-04-13 1977-11-10 Promecan Sisson Lehmann Presse plieuse ou machine analogue
DE2914744A1 (de) * 1979-04-11 1980-10-30 Weinbrenner Paul Maschbau Bombiereinrichtung fuer eine abkantpresse o.dgl.

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2525146A1 (fr) * 1982-04-16 1983-10-21 Canron Corp Dispositif de compensation de la flexion d'une poutre pour supporter un outil allonge en particulier pour presses a plier
FR2596319A1 (fr) * 1986-03-25 1987-10-02 Amada Co Ltd Appareil de bombage pour plieuse
FR2626802A1 (fr) * 1988-02-05 1989-08-11 Colly Ets A Table a bombe reglable pour presse plieuse, marbre ou autre similaire
EP0330258A1 (de) * 1988-02-24 1989-08-30 Cornelis Hendricus Liet Vorrichtung zum Wölben eines Biegepresswerkzeuges
NL8801808A (nl) * 1988-07-15 1990-02-01 Wila Maschf Bv Kantpers en bombeermiddelen daarvoor.
EP0404269A1 (de) * 1989-06-21 1990-12-27 Machinefabriek Wila B.V. Presse und automatische Kurvenherstellungsvorrichtung dafür
US5103665A (en) * 1989-06-21 1992-04-14 Machinefabriek Wila B.V. Press and an automatic curve-forming device therefor
US5009098A (en) * 1989-11-27 1991-04-23 Machinefabriek Wila B.V. Press and curve-forming means therefor
US6725702B2 (en) 2001-10-26 2004-04-27 Ariel Financing Ltd. Apparatus and method for overcoming angular deviations in a workpiece
CN104841732A (zh) * 2015-05-29 2015-08-19 马鞍山市辰兴机械制造有限公司 一种能局部调节的折弯机挠度补偿工作台

Also Published As

Publication number Publication date
US4449389A (en) 1984-05-22
ZA823876B (en) 1983-03-30
JPS583727A (ja) 1983-01-10
EP0067766B1 (de) 1986-12-10
FR2507507B1 (fr) 1986-07-04
DE3274625D1 (en) 1987-01-22
EP0067766A3 (en) 1984-02-22
BR8203269A (pt) 1983-05-24
FR2507507A1 (fr) 1982-12-17
ATE24128T1 (de) 1986-12-15
PT75013B (fr) 1984-01-04
JPH0353078B2 (de) 1991-08-13
ES8303948A1 (es) 1983-03-01
ES512791A0 (es) 1983-03-01
PT75013A (fr) 1982-07-01

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