EP0067766B1 - Dispositif de bombage d'un porte-outil d'une presse plieuse ou analogue - Google Patents

Dispositif de bombage d'un porte-outil d'une presse plieuse ou analogue Download PDF

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Publication number
EP0067766B1
EP0067766B1 EP82401032A EP82401032A EP0067766B1 EP 0067766 B1 EP0067766 B1 EP 0067766B1 EP 82401032 A EP82401032 A EP 82401032A EP 82401032 A EP82401032 A EP 82401032A EP 0067766 B1 EP0067766 B1 EP 0067766B1
Authority
EP
European Patent Office
Prior art keywords
wedge
transverse
tool
screw
socket
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.)
Expired
Application number
EP82401032A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0067766A2 (fr
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/fr
Publication of EP0067766A3 publication Critical patent/EP0067766A3/fr
Application granted granted Critical
Publication of EP0067766B1 publication Critical patent/EP0067766B1/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
    • B21D5/02—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.
  • 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 consequently a regular and precise folding.
  • French patent 1,420,380 is a system of shims arranged between one of the aprons 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.
  • German patent 1 752 346 describes a bending device by means of a series of wedges fixed on a support along the deck and bearing on conical surfaces, all these wedges 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.
  • German application 2 914 744 describes a device comprising a single transverse block 5, the displacement of which is ensured by a series of members actuated from a single control member, this block having, as in the previous case, an inclined face transversely and which is placed in sliding support on a support member.
  • the movable block controlling the bending of the tool has a transverse slope of constant inclination over its entire length. To obtain the bending of this wedge, it is therefore necessary to impart more accentuated displacements to it in its middle part than at either end. In the case of German application 2 914 744, this is obtained by planning to act at different points along the length of the movable wedge, by means of a series of thrust corners which have different profiles.
  • the present invention relates to a device designed so that the bending of this block can be obtained by exerting on it, thrusts of equal values in different points of its length.
  • the subject of the invention is a device for bending a tool holder of a press brake comprising a fixed apron and a movable apron, intended to keep the distance between the tools fixed on the aprons constant during folding of a sheet between them, comprising a single shim extending over the entire length of one of the apron tool holders, having an inclined face transverse to the folding direction and in sliding support on a support member , and means, controlled by a single control system, and capable of exerting, at various points along this wedge, adjustable transverse thrusts in order to deform it elastically by sliding it by its inclined face and thereby bending the tool holder and the associated tool, characterized in that the movable block and its support member consist of two identical parts extending from one end to the other of the tool holder, and each of these parts has a longitu surface dinal conjugate of the corresponding longitudinal surface of the other wedge and having a variable transverse slope so that, when the upper wedge is turned over on the lower wedge
  • each variable surface has a transverse slope on the horizontal which increases from the ends of the wedge to the middle thereof, by a value of zero at a determined angle.
  • the means capable of exerting transverse thrusts, at different points along the wedge to be deformed comprise, at each thrust point, a hollow screw engaged in a socket integral with the tool holder so as to be able to be displaced in translation in this socket, a member for fixing the screw to the wedge to be deformed, and a pinion mounted coaxially with the screw on a thread of that here, in order to be able to drive it in translation in the sleeve, the various pinions thus provided being actuated by a single control system for the rotation of the assembly of these pinions, and consequently for the deformation of the assembly of the hold by the thrusts of the hollow screws on this hold.
  • Figs 1 and 2 are schematic views of a press brake, respectively showing the deformations undergone by the aprons during folding, and a bending applied initially to one of the tool-carrying aprons.
  • Fig. 3 is a partial cross-sectional view on an enlarged scale, of the lower deck of a press brake according to an embodiment of the invention.
  • Fig. 4 is a partial cross-sectional view similar to FIG. 3, at the location of one of the devices fitted along the wedge to exert transverse thrusts thereon.
  • Fig. 5 is a simplified top view of the deformable mobile block and its deformation control system.
  • Fig. 6 is a perspective view of this deformable wedge and its support member, forming a fixed wedge, these two wedges being constituted by two identical parts and shown turned upside down.
  • Fig. 7 is a perspective view of the two wedges of FIG. 6, the movable upper wedge being applied to the fixed lower wedge with respect to which it has been moved transversely and therefore has a bending.
  • FIGS. 1 and 2 show a 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 object of the invention is to print one of the tools of the press with an initial bending, such as that shown by the curve 6 of deformation of the punch of the upper deck 2 (fig. 2).
  • the bending device provided by the invention comprises a movable and deformable upper wedge 37 and its fixed support member 39 which constitutes a fixed wedge.
  • These two shims consist of two identical parts extending from one end to the other of the tool holder 8.
  • the upper shim 37 has a lower longitudinal surface 37a of variable slope combined with a corresponding longitudinal surface 39a of the lower shim 39 , formed on the upper face thereof.
  • the upper wedge 37 is placed between a table 8 forming the tool holder of the folding die, and the lower wedge 39, itself placed on the horizontal upper face 11 of the body of the lower deck 1.
  • the lower wedge 39 has the same length as the upper wedge 37, these two wedges 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 37 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.
  • Each screw 13 thus passes through the table 8, the corresponding hole 12 and that of the fixed wedge 39 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 chamber 16 provided in table 8.
  • the two variable-slope surfaces 37a, 39a of the shims 37 and 39 are complementary so that when the shims 37, 39 are placed one on the other so as to apply the surfaces 37a against each other, 39a, the assembly 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 FIG. 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 a 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 shim 37 When exerting transverse thrusts at different points of the wedge 37, by means of the devices of fig. 4, the shim 37 undergoes a transverse translation on the shim 39, and due to the displacement of the surface 37a on the mating surface 39a, as well as under the effect of the screws 13 and of the elastic washers 14, the upper shim 37 arches to form the desired upper bending 37b (fig. 7).
  • the advantage of this device consists in the fact that, in order 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 avoid fixed points at the ends of the wedge 37 and to obtain the bending of the latter by transverse thrusts of identical values over the entire length of this wedge.
  • the means for exerting transverse thrusts on the wedge 37 comprise at each thrust point, a hollow screw 18 with grooves 19 parallel to the axis of the screw 18 engaged in corresponding grooves of a socket 21 secured to the holder tool 8, so that it can be moved in translation in this socket 21 without turning.
  • the hollow screw 18 is coupled to the shim 37 by a screw 22 which can be introduced into the axial housing 18a of the screw 18 and screwed into the shim 37.
  • the head of the screw 22 is suitably sized relative to the diameter of the housing 18a for 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 37 on the fixed lower wedge 39.
  • 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 37 on the fixed lower wedge 39.
  • the screw 18 and pinion 23 control devices of the wedge 37 are thus distributed along the latter, symmetrically on either side of its transverse axis X-X, as seen in FIG. 5. All the pinions 23 are connected 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 37), and therefore the thrust at as many corresponding points on the wedge 37.
  • the motor 28 can be controlled either by a contactor or by a program in the case of a digital control of the machine.
  • the 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 table 8 which is constantly resting on the wedge 37 thanks to the screws 13 and the elastic washers 14, deforms in the same way as the latter, as does the folding matrix placed on the table 8.
  • the setting of the screws 18 against the shim 37 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 screws 18 may have multipan heads instead of the grooves 19, cooperating with corresponding multipan sections of the sockets 21.
  • a deformable shim such as 37 can also be mounted in an upper movable apron instead of the fixed lower apron.
  • the support member 39 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, Exchange, And Manufacturing Of Dies (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)
  • Electrically Operated Instructional Devices (AREA)
  • Adornments (AREA)
EP82401032A 1981-06-16 1982-06-08 Dispositif de bombage d'un porte-outil d'une presse plieuse ou analogue Expired EP0067766B1 (fr)

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
FR8111805A FR2507507B1 (fr) 1981-06-16 1981-06-16 Dispositif de bombage d'un porte-outil d'une presse plieuse ou analogue
FR8111805 1981-06-16

Publications (3)

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

Family

ID=9259565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401032A Expired EP0067766B1 (fr) 1981-06-16 1982-06-08 Dispositif de bombage d'un porte-outil d'une presse plieuse ou analogue

Country Status (10)

Country Link
US (1) US4449389A (pt)
EP (1) EP0067766B1 (pt)
JP (1) JPS583727A (pt)
AT (1) ATE24128T1 (pt)
BR (1) BR8203269A (pt)
DE (1) DE3274625D1 (pt)
ES (1) ES8303948A1 (pt)
FR (1) FR2507507B1 (pt)
PT (1) PT75013B (pt)
ZA (1) ZA823876B (pt)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4426873A (en) * 1982-04-16 1984-01-24 Canron Corporation Deflection compensating means for press brakes and the like
US4573895A (en) * 1982-09-20 1986-03-04 Ptx-Pentronix, Inc. Adjustable die and punch assembly for compacting powder material
JPH0688079B2 (ja) * 1986-03-25 1994-11-09 株式会社アマダ プレスブレーキにおけるクラウニング装置
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
FR2626802B1 (fr) * 1988-02-05 1993-12-17 Colly Ets A Table a bombe reglable pour presse plieuse, marbre ou autre similaire
NL8800462A (nl) * 1988-02-24 1989-09-18 Liet Cornelis Hendricus Inrichting voor het bomberen van een werktuig van een buiginrichting.
NL194364C (nl) * 1988-07-15 2002-02-04 Machf Wila B V Kantpers en bombeermiddelen daarvoor.
US4898015A (en) * 1988-07-18 1990-02-06 Houston David L Press brake deflection compensating device
NL8901560A (nl) * 1989-06-21 1991-01-16 Wila Maschf Bv Kantpers en een automatische bombeerinrichting daarvoor.
CH680773A5 (pt) * 1989-09-11 1992-11-13 Beyeler Machines Sa
US5009098A (en) * 1989-11-27 1991-04-23 Machinefabriek Wila B.V. Press and curve-forming means therefor
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
US6725702B2 (en) 2001-10-26 2004-04-27 Ariel Financing Ltd. Apparatus and method for overcoming angular deviations in a workpiece
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
CN104841732B (zh) * 2015-05-29 2018-01-09 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
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
EP3706930B1 (en) * 2017-11-06 2024-06-19 Hershberger, Nelson Dwayne Bending machine

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
FR2078874A5 (pt) * 1970-02-18 1971-11-05 Sagita
DE2007259A1 (en) * 1970-02-18 1971-11-04 Fa. Sagita Tagolsheim, Oberelsaß (Frankreich) Adjusting wedge ledge for sheet metal fold-ing presses
FR2119528A5 (pt) * 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.

Also Published As

Publication number Publication date
PT75013B (fr) 1984-01-04
ES512791A0 (es) 1983-03-01
JPS583727A (ja) 1983-01-10
BR8203269A (pt) 1983-05-24
ES8303948A1 (es) 1983-03-01
ATE24128T1 (de) 1986-12-15
US4449389A (en) 1984-05-22
DE3274625D1 (en) 1987-01-22
JPH0353078B2 (pt) 1991-08-13
FR2507507A1 (fr) 1982-12-17
EP0067766A2 (fr) 1982-12-22
FR2507507B1 (fr) 1986-07-04
EP0067766A3 (en) 1984-02-22
PT75013A (fr) 1982-07-01
ZA823876B (en) 1983-03-30

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