US20080034825A1 - Forming Tool - Google Patents

Forming Tool Download PDF

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Publication number
US20080034825A1
US20080034825A1 US10/581,865 US58186504A US2008034825A1 US 20080034825 A1 US20080034825 A1 US 20080034825A1 US 58186504 A US58186504 A US 58186504A US 2008034825 A1 US2008034825 A1 US 2008034825A1
Authority
US
United States
Prior art keywords
die
forming die
insert body
permeable
cavity
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.)
Abandoned
Application number
US10/581,865
Other languages
English (en)
Inventor
Kai-Uwe Dudziak
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.)
Daimler AG
Original Assignee
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Assigned to DAIMLERCHRYSLER AG reassignment DAIMLERCHRYSLER AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DUDZIAK, KAI-UWE
Publication of US20080034825A1 publication Critical patent/US20080034825A1/en
Abandoned 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
    • 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
    • B21D26/021—Deforming sheet bodies
    • B21D26/031—Mould construction
    • 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 a forming die of the type that has a recess which forms a shaping space into which a workpiece can be introduced.
  • a forming die of the generic type which is disclosed in German patent document DE 101 39 135 A1 has a vent line which is formed as a passage, runs within a die block of the forming die and connects the shaping space formed by the die cavity to the area surrounding the die.
  • the vent line opens out at the cavity, the opening where it opens out forms an extremely undesirable mark on the workpiece on account of the high contact pressure with which the workpiece is pressed onto the cavity to achieve the required contour accuracy.
  • the opening of the line may even be so large that the workpiece is pressed into the line, where it is undesirably stamped out, which inevitably leads to the part being scrapped.
  • One object of the invention is to provide a forming die of the generic type, which is simple, and which, during the shaping of a workpiece, achieves contours that are unaffected by the arrangement of passages connecting the shaping space to the area surrounding the die.
  • the forming die according to the invention in which a liquid-permeable and gas-permeable insert body is arranged in the forming die, a peripheral region of which forms a portion of the cavity. Due to a fluidic connection of the passage to this insert body, the opening where the passage opens out is covered, so that no imprint of this opening is formed on the workpiece when it is being pressed onto the cavity by the forming process, in particular in the calibration phase. Therefore, the contours of the workpiece remain unaffected during shaping.
  • the insert body Since the insert body is permeable to liquid and gas, the function of the passage, namely that of discharging (and if appropriate also supplying) liquid or a gas, for example air, is completely retained.
  • An insert body of this type is simple to produce and can readily be installed in the die after the recess intended for it has been formed. When a certain state of wear has been reached, the insert body can be exchanged with little difficulty using suitable securing means.
  • the invention also obviates the problem of predetermining the correct position for forming the passage, since the insert body means that the media which are to be discharged from the cavity are captured over a certain area rather than in punctiform fashion, and can pass through the insert body virtually unimpeded until they reach the opening of the passage. As a result, accurate positioning of the passage is no longer necessary; the passage can now open out at any desired position of the insert body.
  • the insert body consists of a porous sintered metal, which ensures that it is able to withstand the contact pressures resulting from the deformation without being damaged.
  • the porosity is effected by simple pores and micropassages through which liquids and gases can penetrate.
  • the insert body is an ultrafine sieve or a diaphragm. If an ultrafine sieve is used, it should be ensured that the mesh is designed to be as rigid and durable as possible, and is kept as small as possible, so that on the one hand the contact pressures can be absorbed and on the other hand an imprint of the meshes on the workpiece is prevented. If a diaphragm is selected, the diaphragm should be rigid in order to cope with the contact pressures. Of course, the diaphragm must also be permeable to liquids and gases. In addition to complete permeability in this respect, semipermeability of the diaphragm is also conceivable.
  • Ultrafine sieves and diaphragms are inexpensive, very simple to produce and particularly simple to apply to the die. In this case, it is also possible for existing forming dies to be retrofitted with an insert body of this type with only a very small amount of effort.
  • the forming die is a hydroforming die
  • the workpiece is formed by a peripherally continuous hollow profiled section.
  • the configuration of the forming die in accordance with the invention is highly advantageous, since it is known that in the hydroforming process extremely high pressures are exerted on the hollow profiled section, which likewise leads to immense contact pressures of the hollow profiled section against the die cavity.
  • the shape of the cavity is highly accurately reproduced on the hollow profiled section; therefore, the way in which the invention prevents imprints of the openings of passages connected to the shaping space is highly important.
  • the outer contour of the hollow profiled section which is of tolerance-free and highly accurate configuration as a result of the hydroforming process, is retained without need to dispense with the supply or removal of liquids or gases from the shaping space or into the shaping space.
  • the single FIGURE is a lateral longitudinal section, which shows a representative embodiment of a forming die according to the invention, with insert bodies arranged at the shaping space.
  • the FIGURE illustrates a hydroforming die formed as forming die 1 , which has a cavity 3 forming a shaping space, into which a workpiece (in this case a hollow profiled section) is introduced.
  • the forming die 1 may also be a deep-drawing die.
  • a plurality of passages 4 , 5 , 6 and 7 which connect the shaping space 2 to the area surrounding the die, have been machined into the forming die.
  • the passages 4 to 7 are used to supply and/or discharge lubricant to the hollow profiled section which has been introduced into the forming die 1 , in order to reduce the friction between the hollow profiled section and the cavity 3 during the forming process.
  • the passages 4 to 7 can also be used to discharge air and pressure medium, which otherwise (on account of being enclosed in the shaping space 2 ) would very substantially impede the forming process.
  • Air and pressurized fluid in the shaping space 2 originate on the one hand from the volume of air which has not been expelled during closure of the forming die 1 and on the other hand, with regard to the pressurized fluid, from two pressurized fluid fractions, namely the pressurized fluid which flows out after removal of a fully shaped hollow profiled section from the forming die 1 and the pressurized fluid which undesirably enters the gap between hollow profiled section and cavity 3 , passing into the shaping space 2 , during filling of the hollow profiled section.
  • a plurality of liquid and gas-permeable insert bodies 8 are integrated in the forming die 1 and are each accommodated in a recess 9 in the die 1 near to the shaping space.
  • the insert bodies 8 in this case consist of a porous sintered metal, it is also possible for them to be formed by an ultrafine sieve or a diaphragm.
  • the peripheral or surface region 10 of the insert bodies 8 which faces the shaping space 2 itself in each case forms a portion of the cavity 3 , so that there are no discontinuities in the profile of the cavity 3 .
  • the passages 4 to 7 which run within the forming die 1 open out at a rear side 11 of the respective insert body 8 outside said peripheral region 10 .
  • the air or pressurized fluid can penetrate through the pores and/or micropassages of the insert body 8 into the passages 4 to 7 , from which they are discharged from the forming die either through the force of gravity or by means of a suitable pump. Therefore, air and pressurized fluid can easily be displaced by the workpiece, which is moving ever closer to the cavity 3 , out of the shaping space 2 into the passages 4 to 7 via the insert bodies 8 , without an imprint of the opening of the passages 4 to 7 being formed after the workpiece comes into contact with the cavity 3 .
  • an insert body 8 which includes relatively large parts of the die cavity 3 and in this case comprises a plurality of regions of the cavity 3 which are prone to inclusions of media and therefore require discharge of air and pressurized fluid. It is sufficient in this case for only a single passage to be connected to this elongate insert body 8 , since on account of the displacement pressure originating from the workpiece which is being shaped, the air and the pressurized fluid can also penetrate through lateral, oblique and/or labyrinth-like micropassages and pores in the insert body 8 in order to enter the passage 4 , 5 , 6 or 7 .
  • the hydroforming die 1 is configured for the widening of plates, in which case the workpiece is formed by two plates on top of one another, which are clamped in the forming die 1 between its upper and lower die blocks.
  • a fluidic internal high pressure is generated between the plates by means of a lance-like plunger which is assigned to the forming die 1 , has at least one axial pressurized fluid passage inside it and is inserted between the plates, with the result that these plates are expanded to form a hollow profiled section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US10/581,865 2003-12-04 2004-11-10 Forming Tool Abandoned US20080034825A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10356534.5 2003-12-04
DE2003156534 DE10356534B3 (de) 2003-12-04 2003-12-04 Umformwerkzeug
PCT/EP2004/012690 WO2005053870A1 (de) 2003-12-04 2004-11-10 Umformwerkzeug

Publications (1)

Publication Number Publication Date
US20080034825A1 true US20080034825A1 (en) 2008-02-14

Family

ID=32842349

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/581,865 Abandoned US20080034825A1 (en) 2003-12-04 2004-11-10 Forming Tool

Country Status (4)

Country Link
US (1) US20080034825A1 (de)
CA (1) CA2548486A1 (de)
DE (1) DE10356534B3 (de)
WO (1) WO2005053870A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012163840A1 (en) * 2011-05-27 2012-12-06 Airbus Operations Gmbh A device for the superplastic forming of a blank

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004056294B4 (de) * 2004-11-22 2007-09-06 Audi Ag Werkzeug zur Umformung eines Werkstücks
CN1295165C (zh) * 2005-03-17 2007-01-17 周石来 一种含汞废水的处理方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3529458A (en) * 1967-12-15 1970-09-22 Pressed Steel Fisher Ltd Method of forming sheet or plate material
US3993727A (en) * 1974-12-18 1976-11-23 Wallace-Murray Corporation Fluid-release mold and the method of manufacturing the same
US4087037A (en) * 1976-07-09 1978-05-02 Mcdonnell Douglas Corporation Method of and tools for producing superplastically formed and diffusion bonded structures
US4301584A (en) * 1980-01-31 1981-11-24 United Technologies Corporation Method of forming fiber and metal matrix composite
US4691857A (en) * 1985-11-07 1987-09-08 Trw Inc. Method of shaping a workpiece
US5085068A (en) * 1991-01-16 1992-02-04 Extrude Hone Corporation Die forming metallic sheet materials
US7086268B2 (en) * 2004-03-16 2006-08-08 Ford Global Technologies, Llc Apparatus and method for removing and cooling a part from a forming tool

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19516064C2 (de) * 1995-05-04 1998-01-29 Rasselstein Ag Verfahren zur Herstellung eines Blechbehälters mit im wesentlichen bauchiger Form
DE10139135A1 (de) * 2001-08-09 2003-02-20 Bayerische Motoren Werke Ag Umformvorrichtung, insbesondere zur Innenhochdruckumformung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3529458A (en) * 1967-12-15 1970-09-22 Pressed Steel Fisher Ltd Method of forming sheet or plate material
US3993727A (en) * 1974-12-18 1976-11-23 Wallace-Murray Corporation Fluid-release mold and the method of manufacturing the same
US4087037A (en) * 1976-07-09 1978-05-02 Mcdonnell Douglas Corporation Method of and tools for producing superplastically formed and diffusion bonded structures
US4301584A (en) * 1980-01-31 1981-11-24 United Technologies Corporation Method of forming fiber and metal matrix composite
US4691857A (en) * 1985-11-07 1987-09-08 Trw Inc. Method of shaping a workpiece
US5085068A (en) * 1991-01-16 1992-02-04 Extrude Hone Corporation Die forming metallic sheet materials
US7086268B2 (en) * 2004-03-16 2006-08-08 Ford Global Technologies, Llc Apparatus and method for removing and cooling a part from a forming tool

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012163840A1 (en) * 2011-05-27 2012-12-06 Airbus Operations Gmbh A device for the superplastic forming of a blank
CN103717324A (zh) * 2011-05-27 2014-04-09 空中客车德国运营有限责任公司 用于坯料超塑性成形的装置
US8844332B2 (en) 2011-05-27 2014-09-30 Airbus Operations Gmbh Device for the superplastic forming of a blank

Also Published As

Publication number Publication date
WO2005053870A1 (de) 2005-06-16
CA2548486A1 (en) 2005-06-16
DE10356534B3 (de) 2004-09-09

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Legal Events

Date Code Title Description
AS Assignment

Owner name: DAIMLERCHRYSLER AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DUDZIAK, KAI-UWE;REEL/FRAME:019344/0637

Effective date: 20070514

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION