EP0519865A1 - Dispositif pour cintrer du fil ou analogue - Google Patents

Dispositif pour cintrer du fil ou analogue Download PDF

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Publication number
EP0519865A1
EP0519865A1 EP92810439A EP92810439A EP0519865A1 EP 0519865 A1 EP0519865 A1 EP 0519865A1 EP 92810439 A EP92810439 A EP 92810439A EP 92810439 A EP92810439 A EP 92810439A EP 0519865 A1 EP0519865 A1 EP 0519865A1
Authority
EP
European Patent Office
Prior art keywords
bending
turret
tools
feed
feed axis
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.)
Withdrawn
Application number
EP92810439A
Other languages
German (de)
English (en)
Inventor
Rolf Mitschjeta
Franzpeter Brühwiler
Othmar Künzle
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.)
MAX MITSCHJETA AG
Original Assignee
MAX MITSCHJETA 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 MAX MITSCHJETA AG filed Critical MAX MITSCHJETA AG
Publication of EP0519865A1 publication Critical patent/EP0519865A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B21F1/006—Bending wire other than coiling; Straightening wire in 3D with means to rotate the tools about the wire axis

Definitions

  • the invention relates to a device for bending wire or the like according to the preamble of claim 1.
  • bent parts can be produced from wire or similar semi-finished products with bends in different directions.
  • the bending processes are automated so that a specific bent part can be manufactured in series.
  • the rotating bending table enables bending on different bending levels.
  • the rotating bending table enables the finished bent part to be easily ejected after the machining process has been completed.
  • a disadvantage of known devices is that only a single bending tool can be used in each case, which indeed allows bending in the bending plane in two directions and at different angles.
  • the bending radius or the material thickness of the bent part must not be changed. This requires a replacement of the bending tool, which is associated with expensive retrofitting work.
  • the change of the bending tools should in particular also be possible within one machining process.
  • This object is achieved according to the invention with a device which extends the features in claim 1.
  • the turret can hold a certain number of bending tools, which is a wide range of the most common Cover bends and material thicknesses. Since the bending tools can be moved into the bending plane or out of the bending plane with the aid of the lifting device, the turret can be rotated as desired when the bent part is clamped.
  • the lifting and rotating movement of the bending tools can be released particularly easily if they have spline shafts which are held in sleeves with corresponding spline grooves which are held in the turret head in a rotationally drivable manner, and if the lifting device is a pneumatic cylinder with which the spline shafts can be displaced in the sleeves. Large torques can be transmitted via the spline shafts, whereby the axial stroke movement is easily possible.
  • the lifting movement could also be carried out hydraulically or purely mechanically with a camshaft or the like.
  • the bending tools are particularly advantageously biased into a rest position below the bending plane by means of compression springs. This ensures that the bending tools that are not required are always moved back into the turret.
  • the turret and the individual bending tools are driven by two separate drive motors, which are arranged under the bending table. This means that no gear parts have to be switched over and there is the greatest possible freedom when programming the individual movement sequences. In certain applications, it would even be conceivable for the rotation of the turret head also for the Bending process.
  • a space-saving and optimal gear arrangement results if the turret head is driven via a hollow shaft in which a drive shaft for driving the bending tools is mounted coaxially. Since the drive motors and the gearbox rotate together with the bending table around the feed axis, the center of gravity of these parts should be as close as possible to the feed axis. In addition, care must be taken to ensure that the masses do not have to be accelerated to rotate the bending table. The proposed design optimally fulfills these criteria.
  • a cutting device which can be activated at any time, is also particularly advantageously arranged directly on the bending table. This enables very high cycle times in series production.
  • a machine stand 1 carries a roller 3 with a wire 4 wound thereon.
  • This roller can be exchanged as desired.
  • the wire 4 first reaches a straightening device 5, where it is being straightened.
  • the wire is fed via a feed device 2, which feeds the wire in the feed axis 34 in the direction of arrow a, but can also push it back.
  • the feed device consists of drive rollers which are pressed frictionally against the wire, the distance covered e.g. can be measured with an incremental measuring system. The exact and slip-free pushing back and forth of the wire is important in order to obtain dimensionally accurate bent parts.
  • the machine stand 1 also carries a lathe chuck 6, to which a bending table 7 is fastened directly under the feed axis 34.
  • the lathe chuck 6 can be rotated in the direction of arrow b about the wire 4 fixedly clamped in the machine stand 1 by means of a drive motor (not shown here), whereby a change in the bending plane is possible.
  • the rotations can be carried out precisely to a certain angular dimension.
  • a turret 8 with a plurality of bending tools 9 is arranged under the bending table 7 at a certain distance from the lathe chuck 6.
  • the turret can be rotated about an axis 35 in the direction of arrow c, which is at right angles to the feed axis 34.
  • the individual bending tools can be driven in rotation about their axes 36 in the direction of arrow d.
  • the distance of the turret to the lathe chuck 6 or to the machine stand 1 is necessary in order to achieve a certain degree of freedom even with backward bends.
  • a guide or cover 10 ensures that the wire is always held in the feed axis.
  • a cutting device 12 is attached under the bending table 7.
  • the cutting device can be moved from a rest position into the feed axis or into the bending plane.
  • the feed of a bent part is not hindered during the machining process.
  • This control device is preferably designed as a computer on which the operating program for the machine and user-related data for certain bending processes are stored.
  • a gear housing 21 is fastened under the bending table 7 with the aid of a holder 26. Both a hollow shaft 17 and a shaft 18 coaxially in the hollow shaft are mounted in the transmission housing with the aid of roller bearings 31.
  • the gear housing is closed with an end cover 24 and the two shafts are fixed with a nut 25 relative to the housing.
  • the actual turret 8 sits on the hollow shaft 17 and rotates together with the latter about the axis 35.
  • a worm wheel 20 is fastened on the shaft 18 and can be driven by a drive motor 15.
  • a gear 23 is fastened, via which the bending tools 9 can be rotated.
  • sleeves 14 are rotatably mounted about the axis 36.
  • the bushes are provided with an external toothing 22 which meshes with the gear 23.
  • the spline shafts 18 are axially displaceably mounted in the bushes, so that the bending tools 9 are fixed in rotation with the Cans are connected.
  • Figure 3 shows on the left side a bending tool in the operating position and raised to the bending level. All other bending tools are in the lower, inactive position and are partially covered by the bending table 7.
  • Each spline 13 is provided on the underside with a plate 38.
  • a helical compression spring 37 is supported on this plate or on the turret 8 and causes the non-activated bending tools to be prestressed into a rest position below the bending plane.
  • a pneumatic cylinder 27 is arranged in such a way that it can cooperate with the bending tool 9 that is in the operating position on the feed axis 34 (FIG. 1).
  • the piston rod 29 of this pneumatic cylinder is provided with a gripper 30 which engages on the plate 38 and which in this way can push up the spline shaft 13 or the associated bending tool 9.
  • the helical compression spring 37 is pressed together. The control ensures that activation of the pneumatic cylinder 27 is only possible when the turret 8 is correctly positioned.
  • the lower end of the hollow shaft 17 is screwed to the worm wheel 19, which can be driven via a separate drive motor 16.
  • the turret 8 is arranged, which is rotatable in this way.
  • the cutting device 12 is again shown in a highly simplified manner, which can be activated via a separate pneumatic cylinder 28.
  • the scissors elements of the cutting device are arranged such that they remain below the plane of the bending table when the pneumatic cylinder 28 is not activated, so that the feed of the workpiece is not hindered.
  • such cutting devices are known to the person skilled in the art.
  • FIG. 4 shows a typical bending tool 9 with a rectangular anvil 32 and with bending pins or bending rollers 33.
  • FIG. 5 shows an alternative embodiment of a bending tool with which the wire 4 can be bent in a different way.
  • the bending of the wire 4 is not caused here exclusively by the bending tool 9.
  • the two bending rollers 33 are only rotated into a certain position, whereupon the wire 4 is advanced in the direction of the arrow e. This creates a bend with radius R.
  • the turret 8 can be equipped with a plurality of bending tools, which can be used sequentially within one work process.
  • the bending tools in the turret are also interchangeable, so that a turret can be converted to other bending tools.
  • the spline shafts 13 do not have to be dismantled to replace the bending tools.
  • the bending tools can be connected to the spline shaft 13 by means of screws through the opening in the bending table.
  • the control device first 11 the desired bending steps are programmed or an existing work program is read in.
  • the machining process then runs automatically, with the required bending tool being rotated into the operating position and lifted for bending as required.
  • the desired bending plane is selected by rotating the bending table 7 and the bending direction results from the direction of rotation and from the angle of rotation of the bending tools.
  • the finished bent piece is advanced on the wire 4 until it reaches the cutting device 12. There the cutting takes place by extending and closing the cutting device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
EP92810439A 1991-06-18 1992-06-09 Dispositif pour cintrer du fil ou analogue Withdrawn EP0519865A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1803/91 1991-06-18
CH180391 1991-06-18

Publications (1)

Publication Number Publication Date
EP0519865A1 true EP0519865A1 (fr) 1992-12-23

Family

ID=4218967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92810439A Withdrawn EP0519865A1 (fr) 1991-06-18 1992-06-09 Dispositif pour cintrer du fil ou analogue

Country Status (1)

Country Link
EP (1) EP0519865A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999026739A1 (fr) * 1997-11-26 1999-06-03 M.E.P. Macchine Elettroniche Piegatrici S.P.A. Machine de cintrage comportant differents outils de cintrage
ITBO20110293A1 (it) * 2011-05-23 2012-11-24 Schnell Spa Apparecchiatura per la realizzazione di staffe
EP2543452A1 (fr) * 2011-07-08 2013-01-09 WAFIOS Aktiengesellschaft Dispositif de pliage pour pièces usinées en forme de tige
CN103084514A (zh) * 2013-01-28 2013-05-08 李雪玲 变距限位套及应用该套制作的钢筋弯曲机构
WO2013171713A1 (fr) 2012-05-18 2013-11-21 Schnell S.P.A. Procédé et appareil permettant de fabriquer des étriers
ITUD20120160A1 (it) * 2012-09-19 2014-03-20 Omcg S R L Macchina per la piegatura tridimensionale di un prodotto metallico
CN103752722A (zh) * 2011-12-31 2014-04-30 中山市奥美森工业有限公司 一种用于线材折弯机的旋转折弯装置
EP2902132A1 (fr) * 2014-02-04 2015-08-05 Shinko Machinery Co., Ltd. Dispositif de cintrage et machine de fabrication de ressort
DE102008047542C5 (de) * 2008-09-16 2016-02-18 Tracto-Technik Gmbh & Co. Kg Rohrbiegemaschine
DE102016116159A1 (de) 2016-08-30 2018-03-01 Dengler Tubetec Gmbh Verfahren und Vorrichtung zum Biegen von strangförmigen Werkstücken

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1011988A (en) * 1963-03-14 1965-12-01 Slumberland Group Ltd Wire bending machine
GB2172229A (en) * 1985-03-12 1986-09-17 Alpha Maschinenbau Ag Bending apparatus with bending cores on a turret
EP0299857A2 (fr) * 1987-07-16 1989-01-18 Regie Nationale Des Usines Renault Machine de cambrage de fils métalliques
EP0396489A2 (fr) * 1989-04-11 1990-11-07 Anagnostopoulos, Panaghiotis A. Dispositif de pliage additionnel aux machines de formage de fils pour la création de formes tridimensionnelles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1011988A (en) * 1963-03-14 1965-12-01 Slumberland Group Ltd Wire bending machine
GB2172229A (en) * 1985-03-12 1986-09-17 Alpha Maschinenbau Ag Bending apparatus with bending cores on a turret
EP0299857A2 (fr) * 1987-07-16 1989-01-18 Regie Nationale Des Usines Renault Machine de cambrage de fils métalliques
EP0396489A2 (fr) * 1989-04-11 1990-11-07 Anagnostopoulos, Panaghiotis A. Dispositif de pliage additionnel aux machines de formage de fils pour la création de formes tridimensionnelles

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999026739A1 (fr) * 1997-11-26 1999-06-03 M.E.P. Macchine Elettroniche Piegatrici S.P.A. Machine de cintrage comportant differents outils de cintrage
DE102008047542C5 (de) * 2008-09-16 2016-02-18 Tracto-Technik Gmbh & Co. Kg Rohrbiegemaschine
ITBO20110293A1 (it) * 2011-05-23 2012-11-24 Schnell Spa Apparecchiatura per la realizzazione di staffe
WO2012160058A1 (fr) 2011-05-23 2012-11-29 Schnell S.P.A. Équipement pour fabriquer des étriers
EP2543452A1 (fr) * 2011-07-08 2013-01-09 WAFIOS Aktiengesellschaft Dispositif de pliage pour pièces usinées en forme de tige
DE102011106942A1 (de) * 2011-07-08 2013-01-10 Wafios Ag Biegevorrichtung für stabförmige Werkstücke
US9067255B2 (en) 2011-07-08 2015-06-30 Wafios Aktiengesellschaft Bending apparatus for rod-shaped workpieces
CN103752722A (zh) * 2011-12-31 2014-04-30 中山市奥美森工业有限公司 一种用于线材折弯机的旋转折弯装置
WO2013171713A1 (fr) 2012-05-18 2013-11-21 Schnell S.P.A. Procédé et appareil permettant de fabriquer des étriers
ITUD20120160A1 (it) * 2012-09-19 2014-03-20 Omcg S R L Macchina per la piegatura tridimensionale di un prodotto metallico
CN103084514B (zh) * 2013-01-28 2015-09-16 李雪玲 变距限位套及应用该套制作的钢筋弯曲机构
CN103084514A (zh) * 2013-01-28 2013-05-08 李雪玲 变距限位套及应用该套制作的钢筋弯曲机构
EP2902132A1 (fr) * 2014-02-04 2015-08-05 Shinko Machinery Co., Ltd. Dispositif de cintrage et machine de fabrication de ressort
JP2015145025A (ja) * 2014-02-04 2015-08-13 新興機械工業株式会社 曲げ装置及びばね製造機
US9682417B2 (en) 2014-02-04 2017-06-20 Shinko Machinery Co., Ltd. Bending device and spring manufacturing machine
DE102016116159A1 (de) 2016-08-30 2018-03-01 Dengler Tubetec Gmbh Verfahren und Vorrichtung zum Biegen von strangförmigen Werkstücken
DE102016116159B4 (de) 2016-08-30 2018-08-09 Dengler Tubetec Gmbh Verfahren und Vorrichtung zum Biegen von strangförmigen Werkstücken
US10328475B2 (en) 2016-08-30 2019-06-25 DENGLERLANG TUBE TEC GmbH Method and device for bending of strand-shaped workpieces

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