EP1977842A1 - Machine for shaping sheet metal and shaping method - Google Patents

Machine for shaping sheet metal and shaping method Download PDF

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Publication number
EP1977842A1
EP1977842A1 EP07704735A EP07704735A EP1977842A1 EP 1977842 A1 EP1977842 A1 EP 1977842A1 EP 07704735 A EP07704735 A EP 07704735A EP 07704735 A EP07704735 A EP 07704735A EP 1977842 A1 EP1977842 A1 EP 1977842A1
Authority
EP
European Patent Office
Prior art keywords
sheet
tool
fastening
forming machine
tools
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Withdrawn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
EP07704735A
Other languages
German (de)
English (en)
French (fr)
Inventor
Pedro Pablo Rodriguez Gutierrez
Maria Asuncion Rivero Rastrero
Elixabete Maidagan Onandia
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.)
Fundacion Tecnalia Research and Innovation
Original Assignee
Fundacion Fatronik
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 Fundacion Fatronik filed Critical Fundacion Fatronik
Publication of EP1977842A1 publication Critical patent/EP1977842A1/en
Withdrawn legal-status Critical Current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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/24—Deep-drawing involving two drawing operations having effects in opposite directions with respect to the blank

Definitions

  • the present invention is applicable to the manufacturing of pieces according to an incremental process for the treatment of metal sheets or plates.
  • the object of the invention is a sheet-forming machine and method, which does not use dies and which uses two mobile tools, which act in combination on both sides of the sheet for its localised and progressive deformation to create the final shape of the piece.
  • Pieces produced by deforming metal sheets that are used in industrial sectors such as the automotive and aeronautical sectors, among others, are generally produced by stamping processes.
  • the stamping operation requires the use of a press and two dies, an upper and lower die, which reproduce the shape into which the sheet is to be formed.
  • These dies are particularly expensive and they only pay for themselves when they are used for the mass production of a large volume of pieces.
  • an incremental sheet-forming technology is known, which is based on the localised plastic deformation of a metal sheet by the action of a mobile tool that forms the sheet against a set of supports or dies that have a simpler geometry than that required by stamping dies, which normally have the exact geometry of the piece to be formed.
  • This process is also characterised by its great flexibility, as the fact that it does not require dies with the exact geometry of the piece makes it possible to use the same die to form pieces with different geometries and it is also simpler to change the design of the piece once the dies have been manufactured.
  • the sheet is secured by a peripheral frame and the tool can move across the entire surface of the sheet.
  • This technology is applicable to any sector and the only requirement for its use is that the material must be ductile. Pieces of stainless steel, low-carbon steels and various types of aluminium have been manufactured using this technology.
  • Patent of invention EP 0970764 discloses a sheet-forming apparatus that comprises an upper punch with movements in directions X, Y, Z and a lower die that can be moved in the direction of axis Z to form the piece. This same solution is reflected in patent of invention JP 2002102944 .
  • Patent of invention JP 2003053436 contemplates the lower die being able to move in a vertical direction by the action of a cylinder.
  • Patent of invention JP 7132329 is essentially similar to EP 0970764 , except that the lower die consists of a punch.
  • Patent of invention JP 2000153313 discloses a device equipped with an incremental tool with a rotating movement that is applied under pressure to the outline of the piece to be produced, the underside of which rests on a fixed tool situated opposite to the incremental tool.
  • Patent of invention JP 9085355 also discloses an apparatus with an upper punch that moves in a vertical direction and a lower punch with a movement in the direction of axes X, Y and Z.
  • the sheet to be formed has a relative movement, according to X and Y, in relation to an upper tool and a lower die.
  • the upper tool and the lower die have a vertical movement according to axis Z.
  • the invention disclosed herein is applicable to the formation of metal sheets or plates by means of the progressive or incremental action produced by two tools situated on either side of the sheet, which form the material as they move in coordination over the sheet, following specific paths to produce the final geometry of the piece, causing deformations in the sheet, punching or grooves and even cutting the outer edges of the sheet.
  • the machine of the invention comprises:
  • the first tool has at least three degrees of freedom, corresponding to movements according to axes X, Y and Z
  • the second tool has at least two degrees of freedom, corresponding to movements according to axes X and Y, there being a relative movement according to axis Z between the second tool and the means of fastening.
  • the second tool also has a movement according to axis Z.
  • the means of fastening that acts on the sheet remains fixed.
  • the first tool and the second tool define a combined path on both sides and in contact with the sheet, bringing about the localised deformation of the sheet in each sector according to the design that is to form the final piece.
  • the first and/or second tool can comprise any of the following elements: a punch, a bit, a cutter, a welding head or a laser head, for performing all kinds of operations on the sheet, such as deformations, grooves, holes, cuts, final cutting of the outer edge of the piece and heating or welding of the sheet, until the desired final shape of the piece is achieved.
  • first and/or second tool can rotate on its own axis and for the speed of rotation of the first and second tool to be the same or different.
  • the machine can include a lubrication device that applies lubricant to the sheet, either directly or via the first or second tool, e.g. by means of an internal tube leading to a sphere whose rotating movement distributes the lubricant on the sheet.
  • the machine comprises a means of fastening that grips the perimeter of the sheet, forming a frame with a wide opening that defines the working area wherein the tools move as the piece is being formed.
  • the machine can comprise piezoelectric actuators that grip the sheet at various points and sensors that detect the stresses on the sheet and transmit the information to a controller that acts on the piezoelectric actuators to alter the grip on the sheet, allowing more or less material to flow towards the area that is being formed.
  • the controller will be able to run a program deriving from a 3D CAD/CAM program containing the information about the positions and speeds of the different axes of each of the tools and will therefore act by controlling the path and speed of the first and second tool.
  • the controller can also control the force that must be exerted by the piezoelectric actuators that grip the sheet.
  • the forming process according to the present invention can therefore consist of the following steps:
  • the forming method preferably comprises the movement of the second tool, according to axis Z, whilst the means of fastening remains fixed.
  • the forming method additionally comprises the continuous detection of the stresses on the sheet and actuation of the means of fastening to alter the gripping force thereof, according to the stresses detected.
  • the sheet can flow to a greater or lesser extent according to the stresses detected in the deforming areas.
  • FIG. 1 shows a schematic drawing of the machine of the invention, which comprises:
  • the first tool (3) has at least three degrees of freedom, according to axes X, Y and Z
  • the second tool (3') has at least two degrees of freedom, corresponding to movements according to axes X and Y, there being a relative movement according to axis Z between the second tool (3') and the means of fastening (2).
  • the second tool moves according to axis Z, whilst the means of fastening (2) remains fixed, as shown in figure 2 .
  • the means of fastening (2) of the sheet (1) may comprise piezoelectric actuators (6) that establish how the sheet (1) is secured to the peripheral frame (5) with a variable gripping force, so that depending on the stress generated on the sheet by the deformation that is occurring, the grip on the sheet can be released, allowing it to flow towards the deformation area.
  • the sheet-forming machine includes a controller (7), which is shown in figure 1 , that controls the path and speed of the first tool (3) and the second tool (3') and the force exerted on the sheet (1) by the piezoelectric actuators (6) to regulate the flow of material in the area of the sheet (1) that is being deformed.
  • the first tool (3) and/or the second tool (3') may comprise punches (3, 3'), which can optionally rotate, mounted on corresponding heads (4, 4') that come into contact with either side of the sheet (1), bringing about localised deformations followed by incremental movements to form the whole piece.
  • the first tool (3) and/or the second tool (3') additionally has rotating movements ⁇ , ⁇ around axis X and/or axis Y, respectively.
  • first tool (3) and/or the second tool (3') may comprise a bit, a cutter, a laser head or a welding head.
EP07704735A 2006-01-23 2007-01-19 Machine for shaping sheet metal and shaping method Withdrawn EP1977842A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200600138A ES2318932B1 (es) 2006-01-23 2006-01-23 Maquina para el conformado de chapa y procedimiento de conformado.
PCT/ES2007/000021 WO2007082972A1 (es) 2006-01-23 2007-01-19 Máquina para el conformado de chapa y procedimiento de conformado

Publications (1)

Publication Number Publication Date
EP1977842A1 true EP1977842A1 (en) 2008-10-08

Family

ID=38287296

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07704735A Withdrawn EP1977842A1 (en) 2006-01-23 2007-01-19 Machine for shaping sheet metal and shaping method

Country Status (3)

Country Link
EP (1) EP1977842A1 (es)
ES (1) ES2318932B1 (es)
WO (1) WO2007082972A1 (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101947597A (zh) * 2010-07-26 2011-01-19 浙江工业大学 渐进式无模成形方法
EP2505279A1 (en) 2011-03-29 2012-10-03 Mta Sztaki Device for two sided incremental sheet forming
CN103433346A (zh) * 2013-09-03 2013-12-11 深圳市康铖机械设备有限公司 一种小型数控五轴联动立式高压水成形机
WO2016045651A1 (de) * 2014-09-22 2016-03-31 Technische Universität Dortmund Verfahren und vorrichtung zur kombinierten herstellung von bauteilen mittels inkrementeller blechumformung und additiver verfahren in einer aufspannung
WO2018213162A1 (en) * 2017-05-15 2018-11-22 Northwestern University Method and apparatus for double-sided incremental flanging
CN110722066A (zh) * 2019-09-27 2020-01-24 上海交通大学 一种用于板料单点渐进成形的柔性夹持装置和成形方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8783078B2 (en) 2010-07-27 2014-07-22 Ford Global Technologies, Llc Method to improve geometrical accuracy of an incrementally formed workpiece
US9168580B2 (en) 2011-10-24 2015-10-27 Northwestern University System and method for accumulative double sided incremental forming
US9221091B2 (en) 2011-11-04 2015-12-29 Northwestern University System and method for incremental forming
CN107824677A (zh) * 2017-12-11 2018-03-23 南京航空航天大学 一种快速装夹板料的渐进成形升降台

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4034625A1 (de) 1990-10-31 1992-05-07 Doege Eckart Ziehverfahren
JP3292570B2 (ja) 1993-11-11 2002-06-17 茂夫 松原 板材の成形方法及びその成形装置
JP3787900B2 (ja) * 1995-07-20 2006-06-21 株式会社日立製作所 金属板の逐次張出し成形装置
ES2324063T3 (es) * 1998-01-29 2009-07-29 Amino Corporation Aparato para conformado de materiales de lamina sin matriz.
JP3807856B2 (ja) 1998-11-16 2006-08-09 株式会社豊田中央研究所 インクリメンタル押圧成形装置
JP2002102944A (ja) 2000-09-25 2002-04-09 Honda Motor Co Ltd 逐次張出し成形方法
JP4690596B2 (ja) 2001-08-08 2011-06-01 株式会社アミノ 薄板のダイレス成形方法および装置
US6994386B2 (en) 2002-03-21 2006-02-07 Novartis Ag Gripper
DE10331939B4 (de) * 2003-07-15 2014-09-18 Bayerische Motoren Werke Aktiengesellschaft Blechumformwerkzeug

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007082972A1 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101947597A (zh) * 2010-07-26 2011-01-19 浙江工业大学 渐进式无模成形方法
CN101947597B (zh) * 2010-07-26 2013-03-13 浙江工业大学 渐进式无模成形方法
EP2505279A1 (en) 2011-03-29 2012-10-03 Mta Sztaki Device for two sided incremental sheet forming
CN103433346A (zh) * 2013-09-03 2013-12-11 深圳市康铖机械设备有限公司 一种小型数控五轴联动立式高压水成形机
WO2016045651A1 (de) * 2014-09-22 2016-03-31 Technische Universität Dortmund Verfahren und vorrichtung zur kombinierten herstellung von bauteilen mittels inkrementeller blechumformung und additiver verfahren in einer aufspannung
WO2018213162A1 (en) * 2017-05-15 2018-11-22 Northwestern University Method and apparatus for double-sided incremental flanging
US11338348B2 (en) 2017-05-15 2022-05-24 Northwestern University Method and apparatus for double-sided incremental flanging
US11607719B2 (en) 2017-05-15 2023-03-21 Northwestern University Method and apparatus for double-sided incremental flanging
CN110722066A (zh) * 2019-09-27 2020-01-24 上海交通大学 一种用于板料单点渐进成形的柔性夹持装置和成形方法

Also Published As

Publication number Publication date
ES2318932B1 (es) 2010-02-09
ES2318932A1 (es) 2009-05-01
WO2007082972A1 (es) 2007-07-26

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