EP2505279A1 - Vorrichtung zur zweiseitigen inkrementellen Blechumformung - Google Patents

Vorrichtung zur zweiseitigen inkrementellen Blechumformung Download PDF

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Publication number
EP2505279A1
EP2505279A1 EP11462004A EP11462004A EP2505279A1 EP 2505279 A1 EP2505279 A1 EP 2505279A1 EP 11462004 A EP11462004 A EP 11462004A EP 11462004 A EP11462004 A EP 11462004A EP 2505279 A1 EP2505279 A1 EP 2505279A1
Authority
EP
European Patent Office
Prior art keywords
sheet
forming
moving
forming tool
base plate
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
EP11462004A
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English (en)
French (fr)
Other versions
EP2505279B1 (de
Inventor
Janos Somlo
Imre Paniti
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.)
MTA SZTAKI
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MTA SZTAKI
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Filing date
Publication date
Application filed by MTA SZTAKI filed Critical MTA SZTAKI
Priority to EP20110462004 priority Critical patent/EP2505279B1/de
Publication of EP2505279A1 publication Critical patent/EP2505279A1/de
Application granted granted Critical
Publication of EP2505279B1 publication Critical patent/EP2505279B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D31/00Other methods for working sheet metal, metal tubes, metal profiles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D31/00Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/005Incremental shaping or bending, e.g. stepwise moving a shaping tool along the surface of the workpiece

Definitions

  • the present invention relates to a device for two sided incremental sheet forming (TSISF), comprising a sheet plate clamp frame for gripping a sheet around its perimeter, supports for holding said clamp frame on a base plate, an upper forming tool above the sheet, a lower forming tool below the sheet and means for synchronised moving said tools facing each other, according to the preamble of claim 1.
  • TSISF two sided incremental sheet forming
  • Incremental Sheet Forming can be divided into two groups, depending on the number of contact points between sheet, tool and die.
  • the term Single Point Incremental Forming (SPIF) is used when the bottom contour of the part is supported by a faceplate.
  • SPIF Single Point Incremental Forming
  • the forming tool is drawing contours from the outside inwards, moving the centre of the blank gradually downwards.
  • TPIF Two Point Incremental Forming
  • the forming tool in TPIF is drawing contours from the inside outwards, moving the perimeter of the blank gradually downwards or in the other case the die is moving upwards and the blank-holder is fixed.
  • An alternative and more flexible variant with two synchronized forming tools can also be used to make the desired part.
  • This process variant JP 09-085355
  • JP 09-085355 is an obvious extension of TPIF.
  • a synchronised control needs additional sensors and is expensive.
  • EP 1560668 discloses various configurations, including the use of two robots which needs synchronised control.
  • a process with one controller for two synchronized forming tools, with at least three degrees of freedom, corresponding to movements according to axes X, Y and Z, can be found in EP 1977842 .
  • This variant is also characterised in that it comprises the continuous detection of the stresses on the sheet due to the movement of the first and second tools and the actuation on the means of fastening to alter the gripping force thereof, according to the stresses detected.
  • DSIF requires two forming tool heads opposing one another and moving simultaneously on both sides of a sheet metal.
  • the device consists of a C frame mounted on the spindle saddle of a CNC machine and the tool heads are mounted on the top and bottom bases of the C frame.
  • the drawback in this case is that a C frame mounted on the spindle saddle of a CNC machine is limiting the workspace and therefor the freedom of the forming.
  • the main problem with the prior art devices is that the movement of the lower tool may be influenced by the forces acting on the arm holding the tool and the desired accuracy of the forming may not always be achieved.
  • the load on the mount frame or other means holding the forming tools may be more, than 100 kp, and it is rather difficult to keep the exact position of the tools.
  • the object of the present invention is to eliminate the above drawback and to provide a device for two sided incremental sheet forming, which can ensure an accurate forming of sheet materials by stabilized and reliable guiding both of the forming tools.
  • the device suggested in the present invention comprises a mechanical movement copying device as means for synchronised moving the forming tools, and there are also means for moving the lower forming tool on the surface of a base plate, according to axes X and Y.
  • the upper forming tool is moved in X, Y and Z directions, according to the desired form.
  • the lower forming tool is copying the X and Y motion of the upper forming tool, and this X and Y copying motion is realized with a mechanical copying device, but differently from the prior art, the lower forming tool has a motion in Z direction not together with the copying device but using some touching device (mechanic, pneumatic, hydraulic, electrical or the combination of those), it realizes the X and Y copying independently from the Z axis direction motion of the upper forming tool.
  • This lower touching device is fixed to said means for moving the lower forming tool on the surface of a base plate, with at least one ball transfer unit and with three degrees of freedom, corresponding to movements according to axes X and Y and a rotation around axis Z, on a base plate.
  • the reaction force in the Z direction acting on the lower forming tool and consequently on the pressing device from the pressing of the sheet is transferred to the base plate through the moving device.
  • the moving device is passive or active motion equipment and allows free motion in the X-Y plane, and can stabilize the movement of it.
  • a stabilizer may be constructed according to provide e.g. two rotational motions (see Fig. 3 ), one rotation and one translation motion (see Fig. 4 ) or translation motion in X and Y direction (see Fig. 5 ).
  • active motion any kind of drive can be used.
  • the surface touching the lower forming tool mounting may be stiff, compliant, or regulated.
  • the compliant version is preferred, because it provides the most effective self-adjusting position of the lower forming tool.
  • the sheet-forming device contains at least one ball transfer unit as means for moving the lower forming tool on the surface of the base plate, and the ball transfer unit is provided with an electric, mechanic, pneumatic or hydraulic drive.
  • the mechanical movement copying device may be a mount frame, having a C, O or U shape, or may be a spindle-gear or a belt-pulley slide mechanism.
  • the lower forming tool is movable against spring force according to axe Z in the means for moving the lower forming tool.
  • the lower forming tool is moved by drive means according to axe Z in the means for moving the lower forming tool.
  • the drive means for moving the lower forming tool may be an electric, mechanic, pneumatic or hydraulic drive or a hammering device.
  • the device for two sided incremental sheet forming contains a base plate 1 for holding a sheet plate clamp frame 2 for gripping a sheet 4 to be formed.
  • the sheet is clamped by the frame all around its perimeter.
  • the sheet plate clamp frame 2 is mounted on support rods 3 standing on the base plate.
  • a first forming tool 5 is arranged above the sheet 4 and a second forming tool 6 is arranged below the sheet. Both tools are fixed on a mount frame 7.
  • the mount frame has a C shape, and functions as a mechanical movement copying device ensuring synchronized movement of the upper tool and the lower tool, as known from Cao.
  • This means is here a ball transfer unit 8, which holds the lower forming tool at standard height with respect to the base plate, without having any impact to the movement in X or Y directions.
  • the lower forming tool 6 is provided with means 9 for producing counter force in answer to the forming force of the upper forming tool.
  • This means may be e.g. a spring or a pneumatic or hydraulic cylinder.
  • the hydraulic or pneumatic unit may also provide an active force adjusted by a control unit.
  • the device in Fig. 2 is similar to that in Fig. 1 , except that the mount frame 7 is not C shaped, but has a more rigid O shape.
  • Fig. 3 an embodiment is shown, wherein the ball transfer unit is provided with a stabilizer mechanism 10, which can guide the movement of the lower forming unit and the ball transfer unit on the surface of the base plate 1, increasing the stability of the tool and accuracy of the movement.
  • the stabilizer mechanism 10 in this case is a lever transmission, comprising two arms pivotably connected to each other and to the base plate.
  • the mechanism is here a link mechanism comprising an arm pivotably connected to the base plate and having a slot for receiving the lower forming tool.
  • FIG. 5 A further variant of the stabilizer mechanism is shown in Fig. 5 , wherein slides are guiding the ball transfer unit.
  • a first slide 11 is mounted to the ball transfer unit and is moving on rails 12a and 12b, in X direction.
  • Rails 12a and 12b are fixed to slides 13a and 13b, which in turn are moving on rails 14a and 14b, in Y direction.
  • the mechanisms in Figs 3, 4 and 5 are only stabilizing the movement of the lower forming tool 6 (and that of the upper tool as well), but - according to further preferred embodiments - may be provided with their own drive means.
  • the drive means may be any electric, mechanic, pneumatic or hydraulic drive, or even a CNC machine, which is programmed for the desired forming.
  • the means for synchronised moving said tools facing each other are mount frames according to Figs. 1 to 5 , but any other mechanical copying device for synchronised moving said tools may be applied in the device according to the invention.
  • Figs. 6 and 7 show variants for mechanical copying devices.
  • the device in Fig. 6 comprises slides controlled by spindle-gear connections, meanwhile Fig.7 shows a copying device wherein the slides are controlled by pulleys and cables.
  • a rack mechanism with mating gears may also be a variant, similar to the device in Fig.6 .
  • the device according to the invention enables safe and exact moving of the forming tools without applying sophisticated and expensive constructions.
  • the means for moving the lower forming tool on the surface of the base plate e.g. a ball transfer unit eliminates the non desired movement of the forming tools in the direction of the load, and in this way both the movements in X ⁇ Y directions and along axe Z can be controlled undisturbed.
  • the whole device can be easily mounted and dismounted, and therefore it is especially applicable for producing complicated form pieces even in small series.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP20110462004 2011-03-29 2011-03-29 Vorrichtung zur zweiseitigen inkrementellen Blechumformung Not-in-force EP2505279B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20110462004 EP2505279B1 (de) 2011-03-29 2011-03-29 Vorrichtung zur zweiseitigen inkrementellen Blechumformung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110462004 EP2505279B1 (de) 2011-03-29 2011-03-29 Vorrichtung zur zweiseitigen inkrementellen Blechumformung

Publications (2)

Publication Number Publication Date
EP2505279A1 true EP2505279A1 (de) 2012-10-03
EP2505279B1 EP2505279B1 (de) 2013-07-10

Family

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EP20110462004 Not-in-force EP2505279B1 (de) 2011-03-29 2011-03-29 Vorrichtung zur zweiseitigen inkrementellen Blechumformung

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104607523A (zh) * 2015-02-13 2015-05-13 上海交通大学 一种板料搅拌渐进复合成形装置及方法
CN105107933A (zh) * 2015-07-13 2015-12-02 山东大学(威海) 板料电致塑性渐进成形装置及其工作方法
CN106583538A (zh) * 2017-01-10 2017-04-26 西安理工大学 一种单点增量成形工具头轴向振动装置
EP3858511A1 (de) * 2020-01-31 2021-08-04 The Boeing Company Werkzeug für beidseitigen inkrementellen formen und verfahren zur verwendung des werkzeugs

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104858281B (zh) * 2015-02-12 2017-09-08 上海交通大学 可同时实现成形与整形的板材双面三点增量成形装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3316745A (en) 1965-02-08 1967-05-02 Gen Electric Method of dielessly forming surfaces of revolution
US3342051A (en) 1964-08-10 1967-09-19 Leszak Edward Apparatus and process for incremental dieless forming
JPH0985355A (ja) 1995-07-20 1997-03-31 Hitachi Ltd 金属板の逐次張出し成形方法及びその装置
JPH10180365A (ja) 1996-12-24 1998-07-07 Sumitomo Heavy Ind Ltd 逐次張出し成形用工具ユニットおよび逐次張出し成形機
EP1560668A1 (de) 2002-10-07 2005-08-10 Twincam Oy Verfahren und vorrichtung zum bilden von dreidimensionalenformen in einem blech
DE102006002146A1 (de) * 2006-01-17 2007-07-19 Daimlerchrysler Ag Vorrichtung und Verfahren zur inkrementellen Blechumformung
EP1977842A1 (de) 2006-01-23 2008-10-08 Fundacion Fatronik Maschine zum formen von blech und formverfahren
DE102007056358A1 (de) * 2007-11-16 2009-05-20 Bayerische Motoren Werke Aktiengesellschaft Umformwerkzeug sowie Verfahren zur Herstellung eines solchen Umformwerkzeugs

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3342051A (en) 1964-08-10 1967-09-19 Leszak Edward Apparatus and process for incremental dieless forming
US3316745A (en) 1965-02-08 1967-05-02 Gen Electric Method of dielessly forming surfaces of revolution
JPH0985355A (ja) 1995-07-20 1997-03-31 Hitachi Ltd 金属板の逐次張出し成形方法及びその装置
JPH10180365A (ja) 1996-12-24 1998-07-07 Sumitomo Heavy Ind Ltd 逐次張出し成形用工具ユニットおよび逐次張出し成形機
EP1560668A1 (de) 2002-10-07 2005-08-10 Twincam Oy Verfahren und vorrichtung zum bilden von dreidimensionalenformen in einem blech
DE102006002146A1 (de) * 2006-01-17 2007-07-19 Daimlerchrysler Ag Vorrichtung und Verfahren zur inkrementellen Blechumformung
EP1977842A1 (de) 2006-01-23 2008-10-08 Fundacion Fatronik Maschine zum formen von blech und formverfahren
DE102007056358A1 (de) * 2007-11-16 2009-05-20 Bayerische Motoren Werke Aktiengesellschaft Umformwerkzeug sowie Verfahren zur Herstellung eines solchen Umformwerkzeugs

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FRANZEN V., KWIATKOWSKI L., SEBASTIANI G., SHANKAR R., TEKKAYA A.E., KLEINER M.: "Dyna-die: towards full kinematic incremental forming", PROCEEDINGS ESAFORM, LYON, FRANCE, 23 April 2008 (2008-04-23)
YONGJUN WANG, YING HUANG, JIAN CAO: "Experimental Study on a New Method of Double Side Incremental Forming", PROCEEDINGS OF ASME 2008 CONFERENCE, 7 October 2008 (2008-10-07), pages 601 - 607

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104607523A (zh) * 2015-02-13 2015-05-13 上海交通大学 一种板料搅拌渐进复合成形装置及方法
CN105107933A (zh) * 2015-07-13 2015-12-02 山东大学(威海) 板料电致塑性渐进成形装置及其工作方法
CN105107933B (zh) * 2015-07-13 2017-03-01 山东大学(威海) 板料电致塑性渐进成形装置及其工作方法
CN106583538A (zh) * 2017-01-10 2017-04-26 西安理工大学 一种单点增量成形工具头轴向振动装置
CN106583538B (zh) * 2017-01-10 2018-09-25 西安理工大学 一种单点增量成形工具头轴向振动装置
EP3858511A1 (de) * 2020-01-31 2021-08-04 The Boeing Company Werkzeug für beidseitigen inkrementellen formen und verfahren zur verwendung des werkzeugs
US11484932B2 (en) 2020-01-31 2022-11-01 The Boeing Company Tool for enhanced accuracy in double-sided incremental forming

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