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EP0650782A1 - Press brake - Google Patents

Press brake Download PDF

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Publication number
EP0650782A1
EP0650782A1 EP94115354A EP94115354A EP0650782A1 EP 0650782 A1 EP0650782 A1 EP 0650782A1 EP 94115354 A EP94115354 A EP 94115354A EP 94115354 A EP94115354 A EP 94115354A EP 0650782 A1 EP0650782 A1 EP 0650782A1
Authority
EP
European Patent Office
Prior art keywords
stop
press brake
bending line
clamping
switch
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
EP94115354A
Other languages
German (de)
English (en)
Other versions
EP0650782B1 (fr
Inventor
Werner Dilger
Friedrich Kilian
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.)
Trumpf SE and Co KG
Original Assignee
Trumpf SE and Co KG
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 Trumpf SE and Co KG filed Critical Trumpf SE and Co KG
Publication of EP0650782A1 publication Critical patent/EP0650782A1/fr
Application granted granted Critical
Publication of EP0650782B1 publication Critical patent/EP0650782B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21D5/002—Positioning devices
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/26—Stops

Definitions

  • the invention relates to a press brake for folding workpieces along a bending line with an operating area located in front of the bending line, with a stop area located behind the bending line, with a drive for the lifting movement of a bending tool, with a lifting actuating device activating the drive and a switch-on locking device for the Lift actuation device, with a stop device arranged in the stop area, which has a rail that can be moved and positioned perpendicularly to the bending line by a controllable drive, on which at least two stop fingers that can be moved and positioned by hand along the rail and can be fixed via a clamping device are arranged.
  • Press brakes are known in a wide variety of embodiments.
  • each press brake has a back stop, against which the workpiece to be bent is placed before folding, in order to be able to carry out the bending in a precise position.
  • These back gauges are in the X axis, i.e. in the plane of the workpiece and perpendicular to the bending line, as well as in the R axis, i.e. perpendicular to the plane of the workpiece, adjustable. This adjustment must be carried out manually in some embodiments and can be carried out by motor, pneumatically or hydraulically in other press brakes.
  • some press brakes have a front stop and possibly even side stops, via which the position of the workpiece in the operating area can be determined and possibly even changed.
  • the backgauge is designed either as a one-piece stop bar or in the form of several individual stop fingers.
  • both the stop bar and the individual stop fingers can be adjusted either manually or by a suitable drive.
  • the individual stop fingers can be adjusted in the Z-axis, ie in the direction of the bending line, and in particular the distance between the individual stop fingers can be adjusted to be changed. This can also be done either using a suitable drive or manually.
  • the drive for the lifting movement of the bending tool is activated by a lifting actuating device. If the bending tool is in its rest position, the stroke actuating device is locked by a switch-on blocking device until this switch-on blocking device is deliberately deactivated by the operator, so that actuation of the stroke actuating device only activates the drive. In this way, an unintentional actuation of the stroke actuation device is to be prevented.
  • the invention has for its object to develop a press brake of the type mentioned in such a way that the position of the individual stop fingers can be changed manually without risk.
  • a locking device is provided for releasing the clamping device and that the stop device can be moved into a position in which the stop fingers protrude beyond the bending line into the operating area of the press brake, the switch-on locking device is effective and the locking device for releasing the clamping device are ineffective.
  • the bending tool In the press brake according to the invention, the bending tool is thus in its rest position and the stroke actuating device for the drive is locked by the switch-on blocking device, which is switched on or effective.
  • the switch-on blocking device In this position of the bending tool, the stop fingers can be moved out of the stop area over the bending line into the operating area and are therefore more accessible to the operator.
  • the greatest advantage is that the operator no longer has to reach over the bending line into the stop area to move the individual stop fingers, so that the individual stop fingers can be safely moved manually in the press brake according to the invention. Since the switch-on blocking device is effective for the stroke actuating device, there is also no danger that the bending tool will perform a stroke movement and thereby cause hazards or damage.
  • the clamping device is formed by a clamping piece which, when activated, clamps the fingers with the rail.
  • This clamping piece is permanently activated and is only deactivated when the stop fingers overlap the bending line and at the same time the stroke actuating device for driving the bending tool is locked by the switch-on blocking device.
  • the jamming of the finger with the rail also ensures that each individual stop finger executes the feed movement of the rail.
  • the clamping piece has at least one element or a corresponding section which presses against the rail and the stop fingers when activated. This allows the stop finger to be clamped to the rail in a simple manner.
  • the clamping piece is formed by a compressed air cylinder, a magnet or the like.
  • This compressed air cylinder is either tensioned or released by applying compressed air, a high level of safety being obtained by the compressed air cylinder e.g. is biased by the force of a biasing spring and thereby the clamping effect is achieved, the compressed air cylinder assuming its release position by pressurization.
  • This can also be the case with a magnet that applies the clamping effect when it is de-energized and only releases the clamping when a voltage is applied.
  • the clamping piece can be changed in position and / or shape by the application of a fluid.
  • the fluid can be both a gas and a liquid.
  • the clamping piece consists of a hose that can be filled with a fluid, for example a compressed air hose, the cross-sectional shape of which and / or the position of which can be changed by the internal pressure.
  • a fluid for example a compressed air hose
  • the clamping effect can be brought about by applying compressed air, for example.
  • the switch-on blocking device has a switch which interrupts the energy supply to the stroke actuating device. This switch is usually permanently switched on and must be consciously switched off in order to produce the energy supply to the stroke actuating device.
  • the locking device for releasing the clamping device has a switch which interrupts the energy supply for releasing the clamping device, here too the switch assumes a position in which it interrupts the energy supply, the switch only then switching position changes when, as already mentioned at the beginning, the stop fingers overlap the bending line and the switch-on blocking device for the stroke actuating device is activated.
  • a release device for releasing the clamping device, the locking device deactivating the release device.
  • the release of the clamping device does not have to be carried out manually.
  • the stop fingers can immediately after the deactivation of the locking device can be moved manually.
  • FIG. 2 shows a perspective view of a press brake, in particular a press brake of a known type.
  • This press brake which is designated as a whole by 20, has a frame which, for example, comprises two stands 1 and 2, on which an upper beam 3 is guided. Press cylinders 4 and 5, which serve as drive 21, move this upper beam 3 in the direction of arrow 6 downwards and in the opposite direction upwards. At least this stroke movement of the press brake 20 is activated and controlled by a stroke actuation device 7.
  • a stroke actuation device 7 On the upper cheek 3 there is a holder 8 for a bending tool 9, for example a bending die which interacts with a bending die 10. 2, the bending tool 9 is essentially strip-shaped and the bending die 10 is bar-shaped accordingly.
  • FIG. 2 Also shown in FIG. 2 is a sheet metal plate 14 serving as a workpiece 22, which is inserted in the direction of arrow 18 into the press brake 20 until the line labeled 19 is aligned with the bending line 23. If the workpiece 22 is in this position, then the bending tool 9 with its cutting edge 15 lies above the line 19 and the bending die 10 with its V-shaped one lies below the line 19 of the workpiece 22 Exception 16.
  • the area in front of the bending line 23 is defined as the operating area 17 and the area behind the bending line 23 is defined as the stop area 24.
  • the operator, who guides the workpiece 22 and inputs commands on a control panel 25, is usually in the operating area 17.
  • the control panel 25 also has a switch-on blocking device which, when activated, locks the stroke actuating device 7 so that the drive 21 or the press cylinders 4 and 5 cannot be actuated.
  • the upper beam 3 is then locked in the position shown in FIG. 2.
  • the press brake 20 shown in FIG. 2 has a stop device 26 designed as a back stop, which is not shown in FIG. 2, but is shown in another known press brake 20, which is shown in FIG. 3.
  • This stop device 26 shown in FIG. 3 essentially consists of a rail 27 on which two stop fingers 28 and 29 are arranged. These stop fingers 28 and 29 can be moved on the rail 27 in the direction of the arrows 30, which represent the Z direction.
  • the stop fingers 28 and 29 extend in the direction of the bending line 23 and lie on the rear edge, ie on the edge of the workpiece located in the stop region 24 22 on. In this way, the position of the workpiece 22 in the direction of the X axis (arrow 31) can be determined.
  • the switch-on locking device When the workpiece 22 is correctly aligned, the switch-on locking device is deactivated, as a result of which the stroke actuating device 7 is unlocked, so that when it is actuated, the bending tool 9 executes a stroke movement in the direction of the double arrow 32.
  • the workpiece 22 is bent at the bending line 23 and assumes the position shown with a solid line. If the bending tool 9 moves away from the bending die 19, the workpiece 22 falls back in the direction of the arrow 33 onto a support table (not shown).
  • FIG. 1 shows a preferred embodiment of the press brake 20 according to the invention with its individual components.
  • the support bracket 34 for the workpiece 22 which is not shown here for the sake of clarity.
  • Below the control 25 there is a two-hand / foot switch 35 with which the stroke actuating device 7 can be activated.
  • a hydraulic system 36 for the drive 21 of the upper beam 3 of the bending tool 9 is located above the stop area 24.
  • the stop device 26 has moved completely out of the stop area 24 to the rear (on the left in FIG. 1).
  • the stop device 26 is shown enlarged in FIGS.
  • This has a carriage 37 which is mounted on a rail 38 which extends in the X direction, i.e. extends perpendicular to the bending line 23, is movable. In this way, the stop fingers 28, 29 can be moved towards the workpiece 22, not shown, or in the direction of the bending line 23.
  • the stop fingers 28, 29 are shown in a starting position in which they have been completely retracted, i.e. lie at a maximum distance from the bending line 23.
  • the stop fingers designated 128, 129 have advanced so far into the stop region 24 that they do not yet touch the bending line 23.
  • the stop fingers designated 228, 229 are connected via a further drive 39 which e.g. a spindle 40 moves in height, i.e. in the R direction.
  • the stop fingers designated 328, 329 which are only shown broken off, are also offset downward in the R axis.
  • a stop finger is also shown at 428. This position is taken up by the stop finger 428 when the operator is to reposition it in the Z-axis (see FIG. 5).
  • the upper cheek 3 is in its maximum upper position and the stroke actuating device 7 is locked via the switch-on blocking device, so that also at Untimely actuation of the two-hand / foot switch 35, no bending stroke can take place.
  • the fingers 28, 29 are displaceably mounted on a rail 27 so that they can be repositioned when they assume the position as indicated by the reference number 428. This is done manually.
  • the stop fingers 28, 29 are fixed to the rail 27 via a clamping device 42, which is shown in FIG. 6. 6 that the stop fingers 28, 29 consist of a holding part 43 which engages on the rail 27 and a pivotable part 44 which is fastened to the holding part 43 via a joint 45. In the rest position, which is shown in FIG. 6, the part 44 assumes a horizontal position. By pressurizing an expandable element 46, the part 44 can be pivoted upward, as is indicated in FIG. 4.
  • a compressed air hose 47 is provided, which is arranged in an essentially C-shaped profile part 48. Between the compressed air hose 47 and the upper leg of the profile part 48, a spring element 49 engages, which is fastened, for example by means of a screw, to the holding part 43 of the stop finger 28 and moves it the rail 27 follows.
  • the compressed air hose 47, the profile part 48 and the spring element 49 form the clamping device 42, which lock the stop finger 28 on the rail 27.
  • the compressed air hose 47 is pressurized with compressed air so that it inflates and the spring element 49 clamps between it and the profile part 48.
  • the stop finger 28 is fixed in its position.
  • the blowing off of the compressed air from the compressed air hose 47 is controlled by a release device, not shown.
  • This release device is preceded by a locking device which activates or deactivates the release device. If the stop finger 28 is in the position shown in FIG. 6, in which it overlaps the bending line 23, then the locking device is ineffective, so that the compressed air can be blown out of the compressed air hose 47 via the release device and the clamping effect can thereby be released, so that the stop finger 28 on the rail 27 can be moved into the desired position.
  • the stroke actuating device 7 for the upper beam 3 is blocked by the switch-on blocking device.
  • the locking device for the release device is activated so that after the stop finger 28 has been clamped in the desired position, the air from the compressed air hose 47 can no longer be blown off.
  • the stop finger 28 is thus only in the position in which it overlaps the bending line 23 on the rail 27, whereby the clamping device 42 can be released so that the spring element 49 can be moved between the compressed air hose 47 and the profile part 48.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Braking Arrangements (AREA)
EP94115354A 1993-10-08 1994-09-29 Presse plieuse Expired - Lifetime EP0650782B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9315209U DE9315209U1 (de) 1993-10-08 1993-10-08 Abkantpresse
DE9315209U 1993-10-08

Publications (2)

Publication Number Publication Date
EP0650782A1 true EP0650782A1 (fr) 1995-05-03
EP0650782B1 EP0650782B1 (fr) 2000-12-13

Family

ID=6899065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94115354A Expired - Lifetime EP0650782B1 (fr) 1993-10-08 1994-09-29 Presse plieuse

Country Status (5)

Country Link
US (1) US5501095A (fr)
EP (1) EP0650782B1 (fr)
JP (1) JP3012184U (fr)
AT (1) ATE198058T1 (fr)
DE (2) DE9315209U1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2825036A1 (fr) * 2001-05-23 2002-11-29 Amada Europ Sa Presse plieuse pour toles, munie d'un dispositif mobile de butee
US6564442B2 (en) * 2000-12-04 2003-05-20 Trumpf Gmbh + Co. Workpiece bending and joining machine
AT509857A4 (de) * 2010-08-05 2011-12-15 Trumpf Maschinen Austria Gmbh Biegepresse mit einer werkteil-positionier- vorrichtung sowie ein verfahren zum betrieb
WO2012119175A1 (fr) * 2011-03-07 2012-09-13 Trumpf Maschinen Austria Gmbh & Co. Kg. Procédé de positionnement d'une pièce sur une presse plieuse
AT514930B1 (de) * 2013-12-04 2015-05-15 Trumpf Maschinen Austria Gmbh Hinteranschlageinheit für Biegemaschine
CN106853472A (zh) * 2015-12-08 2017-06-16 财团法人金属工业研究发展中心 冲压装置及其冲压方法
AT519203A1 (de) * 2016-10-14 2018-04-15 Trumpf Maschinen Austria Gmbh & Co Kg Hinteranschlag für eine Biegemaschine
CN110774307A (zh) * 2019-12-31 2020-02-11 汇网电气有限公司 基于模块化机械臂的充气柜折弯生产线及模块联动方法
CN112742912A (zh) * 2020-12-21 2021-05-04 南京斯伯克数控装备有限公司 一种高效的带有后挡料调节的折弯机

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5657656A (en) * 1995-12-29 1997-08-19 Aeroquip Corporation Automatic positioning system for a hose assembly and method therefor
WO1998005442A1 (fr) * 1996-08-05 1998-02-12 Amada Co., Ltd. Dispositif de butee arriere
US6082164A (en) * 1998-01-24 2000-07-04 Palmer; Steven E. Method and apparatus for supporting and positioning a workpiece in relation to a machine
DE10163498C1 (de) 2001-12-21 2003-02-20 Eht Werkzeugmaschinen Gmbh Biegemaschine, insbesondere Gesenk- oder Abkantpresse, mit einem verstellbaren Unterwerkzeug
CN100391641C (zh) * 2006-03-20 2008-06-04 上海圣诺机床有限公司 可拆装组合式后定位结构
ITVI20110331A1 (it) * 2011-12-22 2013-06-23 Codatto Internat S P A Macchina industriale per la piegatura di elementi metallici piani
CN102699653B (zh) * 2012-05-22 2016-04-20 大明重工有限公司 一种多厚度金属板材拼焊折弯方法
CN102950203A (zh) * 2012-10-27 2013-03-06 安徽多达皖晶新能源有限公司 一种加工外筒对合搭接口处的折弯机专用模具结构
CN108326169A (zh) * 2018-01-10 2018-07-27 邓瑜 一种箱包胚料双边四角同步折弯机
CN109108655B (zh) * 2018-10-16 2024-02-23 珠海市艾森工匠科技有限公司 端子折弯机构及其折弯方法、汽车线圈绕线点焊流水线
CN114192613B (zh) * 2021-12-01 2022-10-25 湖南沁峰机器人有限公司 折弯机上下料装置
JP7386306B1 (ja) 2022-10-13 2023-11-24 株式会社アマダ 突き当て機構の動作制御方法、突き当て機構の動作制御プログラム及び突き当て機構の動作制御装置

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US4089200A (en) * 1976-08-18 1978-05-16 Dynamics Research Corporation Gaging system
JPS5794428A (en) * 1980-12-05 1982-06-11 Hitachi Ltd Back gauge device for press brake
EP0102852A2 (fr) * 1982-09-07 1984-03-14 Hurco Manufacturing Company, Inc. Arrêt pour une machine à plier la tôle
DE3739949C1 (en) * 1987-11-25 1989-03-16 Hewlett Packard Gmbh Stop device for a plate-bending machine

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US4486841A (en) * 1980-12-09 1984-12-04 Amada Company, Limited Bending press
US4411150A (en) * 1981-10-21 1983-10-25 Houdaille Industries, Inc. Backgauge structure
JP2849428B2 (ja) * 1990-01-24 1999-01-20 株式会社アマダ 板材加工装置のバックゲージ装置
JPH04190924A (ja) * 1990-11-26 1992-07-09 Mitsubishi Electric Corp プレス装置
DE4109028A1 (de) * 1991-03-20 1992-09-24 Peddinghaus Rolf Vorrichtung zum positionieren von werkstuecken

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4089200A (en) * 1976-08-18 1978-05-16 Dynamics Research Corporation Gaging system
JPS5794428A (en) * 1980-12-05 1982-06-11 Hitachi Ltd Back gauge device for press brake
EP0102852A2 (fr) * 1982-09-07 1984-03-14 Hurco Manufacturing Company, Inc. Arrêt pour une machine à plier la tôle
DE3739949C1 (en) * 1987-11-25 1989-03-16 Hewlett Packard Gmbh Stop device for a plate-bending machine

Non-Patent Citations (1)

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PATENT ABSTRACTS OF JAPAN vol. 6, no. 187 (M - 158) 25 September 1982 (1982-09-25) *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6564442B2 (en) * 2000-12-04 2003-05-20 Trumpf Gmbh + Co. Workpiece bending and joining machine
FR2825036A1 (fr) * 2001-05-23 2002-11-29 Amada Europ Sa Presse plieuse pour toles, munie d'un dispositif mobile de butee
EP1264647A1 (fr) * 2001-05-23 2002-12-11 Amada Europe Presse plieuse pour tôles, munie d'un dispositif mobile de doigts de butée
US9278383B2 (en) 2010-08-05 2016-03-08 Trumpf Maschinen Austria Gmbh & Co. Kg. Bending press with a workpiece positioning device and an operating method
AT509857B1 (de) * 2010-08-05 2011-12-15 Trumpf Maschinen Austria Gmbh Biegepresse mit einer werkteil-positionier- vorrichtung sowie ein verfahren zum betrieb
AT509857A4 (de) * 2010-08-05 2011-12-15 Trumpf Maschinen Austria Gmbh Biegepresse mit einer werkteil-positionier- vorrichtung sowie ein verfahren zum betrieb
WO2012119175A1 (fr) * 2011-03-07 2012-09-13 Trumpf Maschinen Austria Gmbh & Co. Kg. Procédé de positionnement d'une pièce sur une presse plieuse
AT514930B1 (de) * 2013-12-04 2015-05-15 Trumpf Maschinen Austria Gmbh Hinteranschlageinheit für Biegemaschine
AT514930A4 (de) * 2013-12-04 2015-05-15 Trumpf Maschinen Austria Gmbh Hinteranschlageinheit für Biegemaschine
CN106853472A (zh) * 2015-12-08 2017-06-16 财团法人金属工业研究发展中心 冲压装置及其冲压方法
CN106853472B (zh) * 2015-12-08 2018-12-11 财团法人金属工业研究发展中心 冲压装置及其冲压方法
AT519203A1 (de) * 2016-10-14 2018-04-15 Trumpf Maschinen Austria Gmbh & Co Kg Hinteranschlag für eine Biegemaschine
AT519203B1 (de) * 2016-10-14 2018-10-15 Trumpf Maschinen Austria Gmbh & Co Kg Hinteranschlag für eine Biegemaschine
CN110774307A (zh) * 2019-12-31 2020-02-11 汇网电气有限公司 基于模块化机械臂的充气柜折弯生产线及模块联动方法
CN110774307B (zh) * 2019-12-31 2020-04-28 汇网电气有限公司 基于模块化机械臂的充气柜折弯生产线及模块联动方法
CN112742912A (zh) * 2020-12-21 2021-05-04 南京斯伯克数控装备有限公司 一种高效的带有后挡料调节的折弯机

Also Published As

Publication number Publication date
EP0650782B1 (fr) 2000-12-13
DE59409607D1 (de) 2001-01-18
ATE198058T1 (de) 2000-12-15
JP3012184U (ja) 1995-06-13
US5501095A (en) 1996-03-26
DE9315209U1 (de) 1995-02-16

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