EP1466680A1 - Verfahren zum Umformen von rohrförmigen Werkstücken mit einem segmentierten Werkzeug - Google Patents

Verfahren zum Umformen von rohrförmigen Werkstücken mit einem segmentierten Werkzeug Download PDF

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Publication number
EP1466680A1
EP1466680A1 EP04101367A EP04101367A EP1466680A1 EP 1466680 A1 EP1466680 A1 EP 1466680A1 EP 04101367 A EP04101367 A EP 04101367A EP 04101367 A EP04101367 A EP 04101367A EP 1466680 A1 EP1466680 A1 EP 1466680A1
Authority
EP
European Patent Office
Prior art keywords
segments
tool
piece
retaining elements
inserts
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
EP04101367A
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English (en)
French (fr)
Other versions
EP1466680B1 (de
Inventor
Jonas Bjuhr
Tomas Nilsson
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.)
Sapa Profilbockning AB
Original Assignee
Sapa Profiler AB
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 Sapa Profiler AB filed Critical Sapa Profiler AB
Priority to PL04101367T priority Critical patent/PL1466680T3/pl
Publication of EP1466680A1 publication Critical patent/EP1466680A1/de
Application granted granted Critical
Publication of EP1466680B1 publication Critical patent/EP1466680B1/de
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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/02—Die constructions enabling assembly of the die parts in different ways
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/047—Mould construction

Definitions

  • the invention relates to the forming of tubular work-pieces by internal pressure created by a fluid, i e hydroforming, and in particular to a segmented tool used for said forming operation.
  • the hydroforming process is described in "Hydroforming - Umformen mit Wirkmedien im Automobilbau, Verlag Moderne Industrie, Landsberg, 2002".
  • tubes formed to final shape by insertion in a tool where the tubes are expanded by applying an internal pressure to the inside of the tube using a fluid.
  • the tubes may be straight or pre-bent depending on the final requirements.
  • Hydroforming of large work-pieces, such as side-members for car body structures presents significant problems due to the difficulty of handling the very heavy tools that are required as moulds during forming.
  • segmented tool inserts i e tools that consists of two or more parts, are sometimes used, which considerably facilitates the handling and makes it possible to exchange parts of the inserts if the insert has been damaged or worn, without replacing the whole tool.
  • the base block may be manufactured in one part or may comprise a base and vertical supports fixed to it. The disadvantage of this arrangement is the high cost for the base blocks and the fact that these base blocks are even heavier and more difficult to handle than single piece inserts.
  • An object of the present invention is to provide a simplified tool for hydroforming of tubular work-pieces, where the use of very large tooling blocks can be prevented.
  • the invention is particularly useful when small series or prototypes are manufactured.
  • a tool comprising a pair of upper and lower tool inserts having open axial ends and defining an elongated cavity there between when said tool inserts are forced together.
  • the upper and/or lower tool inserts are composed of segments that are attached to the upper and a lower base plates by bolts.
  • Retaining elements such as pins, are introduced into holes in the base plates from where they extend thorough the base plate and continue into cavities formed in the segmented insert (or extend from the insert into holes in the baseplate). This prevents the insert segments from moving during the forming operation.
  • the retaining elements normally have a round or a conical shape for easier guidance into the cavities and a tight tolerance to the cavities to minimise movement of the segments. In this way the use of base blocks may be omitted.
  • guide columns are used to guide the tool inserts to the desired position on the base plate.
  • the guide columns are attached to the upper base plate and extend through the base plate and the insert.
  • the guide columns and the retaining elements may also be attached or form part of the inserts and extend through the base plate into the
  • the retaining elements may act as guide columns, or separate guide columns may be used.
  • the tolerances has to be tight between pin and the hole in the base plate to assure the non-movement of the insert segments.
  • the friction force between the base plate and the insert may be high enough to prevent axial movement of the segments, and in this case the retaining elements may be omitted.
  • a pair of mandrels adjacent the axial open ends of the elongated cavity retain the tubular work-piece in the cavity and forms a sealed closure of the ends of the tubular work-piece.
  • Work-piece material is forced axially inwardly during forming of the work-piece and hydroforming liquid is entered through the mandrel into the work-piece for hydroforming the work-piece into the final shape.
  • the pressurising of the work-piece may be done either before of after the closure of the tool.
  • the method of the present invention allows the elimination of the very large and heavy base blocks that has been a prerequisite in previously used methods. In this way production times may be shortened and the costs reduced.
  • FIG 1 a segmented tool according to the state of the art is shown.
  • Vertical supports (V) fixed to the base block, prevents movement of the segments.
  • a hydroforming tool comprising a base plate (A) and a segmented insert (B), having through holes for guide columns (C) and smaller diameter holes (D) for the retaining elements (pins not shown in figure).
  • the retaining elements are snugly fitted into the base plate, which makes attachment of the elements superfluous.
  • the tool is free from vertical supports acting on the outer surface of the insert.
  • the guide columns assure the guiding of the tool parts to their exact position.
  • pressure is applied to the hydroforming liquid, high forces act on the tool parts, some of these in directions that would cause separation of the segments of the inserts if no opposed forces counteract them.
  • the number of segments may be varied freely, it is however common for the number of segments to exceed two.
  • the invention provides a method of hydroforming hollow work-pieces by providing a pair of upper and lower tool inserts (B) having open axial ends and defining an elongated cavity (E) there between when said tool inserts are forced together, said upper and/or lower tool inserts being composed of at least two segments that are in a locked position in all directions (X, Y, Z) during the forming of the work-piece and in contact with a base plate (A) on the side opposite to the cavity and
  • a hydroforming tool comprising an upper punch, base plates with a pair of upper and lower tool inserts attached to them is used for forming of a tubular work-piece made from extruded aluminium.
  • the inserts have open axial ends and define an elongated cavity between them when the tool is closed.
  • the inserts are each composed of at least two segments that are screwed onto the base plates. Retaining elements are introduced into holes in the base plate and partially through the segments of the inserts. Guide columns extending through and from the base plates are introduced into cavities formed in the segmented inserts when the upper punch is lowered.
  • a tubular work-piece was put in said cavity and the upper and lower tool inserts moved together to deform portions of the work-piece.
  • the ends of the tubular work-piece were sealed and the work-piece filled with liquid through an inlet in the mandrels while supplying work-piece material axially inwardly.
  • a hydroforming tool as in example 1, but without retaining elements, is used for forming a tubular work-piece made from extruded aluminium.
  • the tubular work-piece is put in said cavity and the upper and lower tool inserts are moved together to deform portions of the work-piece while supplying work-piece material axially inwardly.
  • Pressure of 1500 tonnes is applied to the tool parts by the tool punch.
  • Pressure is then applied to the inside of the work-piece by increasing the pressure on said liquid to 1000 bar.
  • the tool is opened and the formed pieces are removed. No movement of the segments could be observed

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Turning (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP04101367A 2003-04-09 2004-04-02 Verfahren zum Umformen von rohrförmigen Werkstücken mit einem segmentierten Werkzeug Expired - Lifetime EP1466680B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04101367T PL1466680T3 (pl) 2003-04-09 2004-04-02 Sposób kształtowania rurowych elementów poddawanych obróbce z wykorzystaniem narzędzia segmentowanego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0301056 2003-04-09
SE0301056A SE0301056D0 (sv) 2003-04-09 2003-04-09 Method for forming of tubular work-pieces using a segmented tool

Publications (2)

Publication Number Publication Date
EP1466680A1 true EP1466680A1 (de) 2004-10-13
EP1466680B1 EP1466680B1 (de) 2007-01-03

Family

ID=20290983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04101367A Expired - Lifetime EP1466680B1 (de) 2003-04-09 2004-04-02 Verfahren zum Umformen von rohrförmigen Werkstücken mit einem segmentierten Werkzeug

Country Status (5)

Country Link
EP (1) EP1466680B1 (de)
AT (1) ATE350178T1 (de)
DE (1) DE602004003986T2 (de)
PL (1) PL1466680T3 (de)
SE (1) SE0301056D0 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006062079B4 (de) * 2006-11-08 2017-06-01 Hyundai Motor Co. Vorrichtung zum Hydroformen zur Herstellung von U-förmigen Teilen
CN108356130A (zh) * 2018-04-02 2018-08-03 苏州柏仕非奥自动化设备科技有限公司 制造车用异形界面管件的内高压成型装置
CN108356129A (zh) * 2018-04-02 2018-08-03 苏州柏仕非奥自动化设备科技有限公司 空心管件内高压成型用模具
CN110052525A (zh) * 2019-06-05 2019-07-26 哈尔滨奔马液压成型零部件有限公司 一种空间轴线薄壁管的一模多件整体成形模具及其方法
WO2020120049A1 (de) * 2018-12-12 2020-06-18 Endress+Hauser SE+Co. KG Verfahren zur herstellung von metallischen rohrmembranen für druckmittler
EP2873472B1 (de) * 2013-11-14 2021-04-14 Bombardier Transportation GmbH Verfahren zur Herstellung eines rohrförmigen Ausstattungselements für ein Schienenfahrzeug

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017004570A1 (de) * 2017-05-11 2018-11-15 Technische Universität Dortmund Werkzeug für das Innenhochdruckumformen aus einzeln austauschbaren, formgebenden Segmenten

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19618626A1 (de) * 1996-05-09 1997-11-13 Daimler Benz Ag Unlösbare Verbindung und eine Anordnung zur Herstellung derselben
US5815901A (en) * 1993-08-16 1998-10-06 Ti Corporate Services Apparatus for expansion forming of tubing forming of tubing
DE19854114A1 (de) * 1998-11-24 2000-05-25 Volkswagen Ag Innenhochdruck-Umformwerkzeug
US6164108A (en) * 1998-07-21 2000-12-26 Aquaform, Inc. Hydro compression tube forming die apparatus and method for making the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5815901A (en) * 1993-08-16 1998-10-06 Ti Corporate Services Apparatus for expansion forming of tubing forming of tubing
DE19618626A1 (de) * 1996-05-09 1997-11-13 Daimler Benz Ag Unlösbare Verbindung und eine Anordnung zur Herstellung derselben
US6164108A (en) * 1998-07-21 2000-12-26 Aquaform, Inc. Hydro compression tube forming die apparatus and method for making the same
DE19854114A1 (de) * 1998-11-24 2000-05-25 Volkswagen Ag Innenhochdruck-Umformwerkzeug

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006062079B4 (de) * 2006-11-08 2017-06-01 Hyundai Motor Co. Vorrichtung zum Hydroformen zur Herstellung von U-förmigen Teilen
EP2873472B1 (de) * 2013-11-14 2021-04-14 Bombardier Transportation GmbH Verfahren zur Herstellung eines rohrförmigen Ausstattungselements für ein Schienenfahrzeug
CN108356130A (zh) * 2018-04-02 2018-08-03 苏州柏仕非奥自动化设备科技有限公司 制造车用异形界面管件的内高压成型装置
CN108356129A (zh) * 2018-04-02 2018-08-03 苏州柏仕非奥自动化设备科技有限公司 空心管件内高压成型用模具
WO2020120049A1 (de) * 2018-12-12 2020-06-18 Endress+Hauser SE+Co. KG Verfahren zur herstellung von metallischen rohrmembranen für druckmittler
CN110052525A (zh) * 2019-06-05 2019-07-26 哈尔滨奔马液压成型零部件有限公司 一种空间轴线薄壁管的一模多件整体成形模具及其方法

Also Published As

Publication number Publication date
ATE350178T1 (de) 2007-01-15
DE602004003986D1 (de) 2007-02-15
EP1466680B1 (de) 2007-01-03
DE602004003986T2 (de) 2007-04-26
SE0301056D0 (sv) 2003-04-09
PL1466680T3 (pl) 2007-05-31

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