EP0190640A2 - Umformung durch Pressen - Google Patents

Umformung durch Pressen Download PDF

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Publication number
EP0190640A2
EP0190640A2 EP86101065A EP86101065A EP0190640A2 EP 0190640 A2 EP0190640 A2 EP 0190640A2 EP 86101065 A EP86101065 A EP 86101065A EP 86101065 A EP86101065 A EP 86101065A EP 0190640 A2 EP0190640 A2 EP 0190640A2
Authority
EP
European Patent Office
Prior art keywords
preform
forming
tool
sheet metal
pressure box
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Withdrawn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
EP86101065A
Other languages
English (en)
French (fr)
Other versions
EP0190640A3 (de
Inventor
Anthony Green
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.)
TKR International Ltd
Original Assignee
TKR International Ltd
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 TKR International Ltd filed Critical TKR International Ltd
Publication of EP0190640A2 publication Critical patent/EP0190640A2/de
Publication of EP0190640A3 publication Critical patent/EP0190640A3/de
Withdrawn legal-status Critical Current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
    • 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
    • B21D26/053—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 characterised by the material of the blanks
    • B21D26/055—Blanks having super-plastic properties

Definitions

  • THIS INVENTION concerns the pressing of contoured shapes in sheet metal, using the technique of superplastic forming.
  • An object of the present invention is to provide a process and equipment for pressing contoured shapes from sheet metal that avoids various disadvantages of the known techniques.
  • the present invention provides a process for the superplastic forming of sheet metal into contoured shapes, comprising establishing a preform of superplastically deformable sheet metal; sealingly securing the periphery of said preform in a pressure box and, with the preform at a temperature appropriate for superplastic forming, engaging said preform with a forming tool to support the face of the preform external of the pressure box; and applying fluid pressure to said pressure box to effect superplastic deformation of the preform into conformity with the forming tool.
  • Preferably sold forming tool Is a male tool and Is thrust into engagement with the preform to accomplish a preliminary -forming of the latter, e.g. to accomplish partial stretch-forming of the preform.
  • This procedure is especially desirable when a preform of single curvature is to be formed to a final product having compound curvature
  • the process may be applied to the forming of any superplastically deformable sheet metal, for example, titanium and titanium alloy sheet, and stainless steel sheet.
  • the invention is especially applicable to the production of extended, non-linear, saddle-section shapes, such as erosion shields for helicopter rotor blades having leading edges that exhibit spanwise non-linearity.
  • a suitable preform of the sheet metal to be formed is constructed, using hot or cold forming techniques as appropriate to the metal and to the preform shape required.
  • the preform is then, if necessary, heated to the required temperature for superplastic forming either in situ adjacent to the pressure box or externally in a pre-heating chamber such as an infra-red oven. If external pre-heating is employed, the pre-heated preform, at the forming temperature, is transferred to the pressure box and secured therein.
  • the preform is next engaged by the forming tool and then is superplastically deformed into conformity with the configuration of the tool, by causing the preform to move towards the tool by the application of fluid pressure to the pressure box.
  • the invention also provides apparatus for performing the process thereof.
  • apparatus for forming sheet metal comprising a pressure box and means for sealingly securing the periphery of a superplastically deformable sheet metal preform therein; a forming tool for engaging the face of the preform external of the pressure box; and means for applying fluid pressure to said pressure box to effect superplastic deformation of the preform into conformity with the forming tool.
  • the apparatus shown in the drawings comprises an essentially rigid male forming tool I adapted to be mounted directly or indirectly on a lower platen of a suitable press (not shown).
  • a pressure box 2 of a configuration providing clearance over the tool I is carried by the upper press platen (not shown) so as to be movable into position over the tool and be held by the press, to retain the tool I and pressure box 2 in fixed relative positions during a forming operation.
  • the apparatus further comprises a clamping frame 3 that has a sealing surface 4 complementary to the periphery of the pressure box 2 and serves to sealingly secure the periphery of a sheet metal preform in the pressure box 2.
  • a preform 5 is first fabricated to the arched shape illustrated in Figures I and 2, for instance by heating a sheet of the required metal to a suitably high temperature and deforming the sheet by simple pressing.
  • the preform 5 is then introduced into the pressure box 2 and clamped in place by means of the clamping frame 3.
  • the preform is raised to an appropriate temperature either before being introduced into the pressure box 2, or while in situ therein, e.g. by radiant heating.
  • Figure 2 illustrates the apparatus components and the preform configuration at this stage in the operation.
  • FIG. 3 illustrates the apparatus components and the preform configuration at this stage in the operation.
  • the temperature required in the forming operation depends upon the metal of the preform. In the case of titanium sheet, a forming temperature of about 930°C is appropriate to develop the required superplasticity.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP86101065A 1985-02-04 1986-01-27 Umformung durch Pressen Withdrawn EP0190640A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8502772 1985-02-04
GB858502772A GB8502772D0 (en) 1985-02-04 1985-02-04 Pressing contoured shapes

Publications (2)

Publication Number Publication Date
EP0190640A2 true EP0190640A2 (de) 1986-08-13
EP0190640A3 EP0190640A3 (de) 1987-04-01

Family

ID=10573900

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86101065A Withdrawn EP0190640A3 (de) 1985-02-04 1986-01-27 Umformung durch Pressen

Country Status (3)

Country Link
EP (1) EP0190640A3 (de)
JP (1) JPS61182826A (de)
GB (1) GB8502772D0 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0648555A1 (de) * 1991-10-03 1995-04-19 Rockwell International Corporation Formung von intermetallischem Material mit gewöhnlicher Blechbearbeitungseinrichtung
WO1999062653A1 (en) * 1998-06-02 1999-12-09 General Motors Corporation Superplastic forming process

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5715768B2 (ja) * 2010-05-19 2015-05-13 東プレ株式会社 熱間プレス装置及び熱間プレス製品
JP6029902B2 (ja) * 2012-09-14 2016-11-24 株式会社Uacj 成形方法および成形装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974673A (en) * 1975-04-07 1976-08-17 Rockwell International Corporation Titanium parts manufacturing
CH611815A5 (en) * 1976-05-21 1979-06-29 T I Superform Ltd Process and apparatus for producing a shaped body
DE2839469A1 (de) * 1978-09-11 1980-03-20 Rockwell International Corp Verfahren zur herstellung eines metallgebildes
GB2096513A (en) * 1981-04-10 1982-10-20 Superform Metals Ltd Dual motion press

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974673A (en) * 1975-04-07 1976-08-17 Rockwell International Corporation Titanium parts manufacturing
CH611815A5 (en) * 1976-05-21 1979-06-29 T I Superform Ltd Process and apparatus for producing a shaped body
DE2839469A1 (de) * 1978-09-11 1980-03-20 Rockwell International Corp Verfahren zur herstellung eines metallgebildes
GB2096513A (en) * 1981-04-10 1982-10-20 Superform Metals Ltd Dual motion press

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0648555A1 (de) * 1991-10-03 1995-04-19 Rockwell International Corporation Formung von intermetallischem Material mit gewöhnlicher Blechbearbeitungseinrichtung
WO1999062653A1 (en) * 1998-06-02 1999-12-09 General Motors Corporation Superplastic forming process
AU741012B2 (en) * 1998-06-02 2001-11-22 Gm Global Technology Operations, Inc. Superplastic forming process

Also Published As

Publication number Publication date
GB8502772D0 (en) 1985-03-06
EP0190640A3 (de) 1987-04-01
JPS61182826A (ja) 1986-08-15

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Inventor name: GREEN, ANTHONY