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WO2007133546A3 - Method and apparatus for creep forming of and relieving stress in an elongated metal bar - Google Patents

Method and apparatus for creep forming of and relieving stress in an elongated metal bar Download PDF

Info

Publication number
WO2007133546A3
WO2007133546A3 PCT/US2007/011113 US2007011113W WO2007133546A3 WO 2007133546 A3 WO2007133546 A3 WO 2007133546A3 US 2007011113 W US2007011113 W US 2007011113W WO 2007133546 A3 WO2007133546 A3 WO 2007133546A3
Authority
WO
WIPO (PCT)
Prior art keywords
metal bar
temperature
forming
inch
die
Prior art date
Application number
PCT/US2007/011113
Other languages
French (fr)
Other versions
WO2007133546A2 (en
Inventor
Kuninori Minakawa
Arvind R Keskar
Adrian Barb
Original Assignee
Rti Int Metals Inc
Kuninori Minakawa
Arvind R Keskar
Adrian Barb
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 Rti Int Metals Inc, Kuninori Minakawa, Arvind R Keskar, Adrian Barb filed Critical Rti Int Metals Inc
Priority to EP07794655A priority Critical patent/EP2018234A2/en
Priority to JP2009509813A priority patent/JP2009536880A/en
Publication of WO2007133546A2 publication Critical patent/WO2007133546A2/en
Publication of WO2007133546A3 publication Critical patent/WO2007133546A3/en

Links

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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/02—Bending by stretching or pulling over a die
    • 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
    • B21D37/16—Heating or cooling

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

A hot creep stretch wrap forming method includes heating a metal bar to a forming temperature within a temperature range suitable for creep deformation thereof, applying a stretching force to the metal bar at a strain rate no greater than 0.05 inch/inch/second, and wrapping the metal bar around a die, preferably having a thermally and/or electrically insulative work surface. The stretching force is typically applied to a strain ranging from 0.5% to 15.0%. The metal bar most preferably is a titanium alloy with a forming temperature ranging from 0.45 to 0.60 of its melting temperature. The wrapped metal bar is held in position and its temperature maintained within the temperature range typically for 5 to 120 minutes for stress relief. Preferably, the metal bar is held substantially at the forming temperature throughout the process. Thermal insulation around the die and metal bar reduce heat loss from the metal bar.
PCT/US2007/011113 2006-05-11 2007-05-08 Method and apparatus for creep forming of and relieving stress in an elongated metal bar WO2007133546A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07794655A EP2018234A2 (en) 2006-05-11 2007-05-08 Method and apparatus for creep forming of and relieving stress in an elongated metal bar
JP2009509813A JP2009536880A (en) 2006-05-11 2007-05-08 Method and apparatus for creep forming of elongated metal bars and stress relaxation thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/432,046 2006-05-11
US11/432,046 US20070261462A1 (en) 2006-05-11 2006-05-11 Method and apparatus for creep forming of and relieving stress in an elongated metal bar

Publications (2)

Publication Number Publication Date
WO2007133546A2 WO2007133546A2 (en) 2007-11-22
WO2007133546A3 true WO2007133546A3 (en) 2008-10-23

Family

ID=38683855

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/011113 WO2007133546A2 (en) 2006-05-11 2007-05-08 Method and apparatus for creep forming of and relieving stress in an elongated metal bar

Country Status (6)

Country Link
US (1) US20070261462A1 (en)
EP (1) EP2018234A2 (en)
JP (1) JP2009536880A (en)
KR (1) KR20090007601A (en)
CN (1) CN101443138A (en)
WO (1) WO2007133546A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4866936B2 (en) * 2009-05-15 2012-02-01 日本飛行機株式会社 Titanium alloy strip material bending machine
CN102873145B (en) * 2012-10-19 2015-03-25 中国十九冶集团有限公司 Device and method for machining angle steel of conical bin wall
CN106271441A (en) * 2016-08-30 2017-01-04 北京普惠三航科技有限公司 The thermal creep manufacturing process of machining lightening grooves titanium alloy covering
CN111299376B (en) * 2020-03-07 2022-01-11 公主岭市大鹏航空设备有限公司 Section bar stretch bending device for aircraft manufacturing
CN113245402B (en) * 2021-06-02 2022-01-25 索罗曼(常州)合金新材料有限公司 Low-cost titanium alloy creep shape correcting furnace
CN113560381B (en) * 2021-07-27 2022-03-29 北京航空航天大学 Large-section titanium alloy profile high-temperature creep forming tool and using method thereof
CN114558921A (en) * 2022-03-01 2022-05-31 中国航空制造技术研究院 Electric heating stretch bending die and electric heating stretch bending forming method

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US4354369A (en) * 1980-05-16 1982-10-19 Rockwell International Corporation Method for superplastic forming

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US3021887A (en) * 1956-07-19 1962-02-20 Rohr Aircraft Corp Titanium stretch forming
US2905225A (en) * 1956-09-13 1959-09-22 Romeo A Lalli Stretch former with replaceable heated die and pivotally mounted draw bar
US3169156A (en) * 1960-12-23 1965-02-09 Gen Dynamics Corp Apparatus for the forming and aging of titanium alloys
US3426569A (en) * 1967-01-31 1969-02-11 Cyril Bath Co Stretch forming machine and segmental adjustable die combination
US3452573A (en) * 1967-06-14 1969-07-01 Cyril Bath Co Stretch wrapping fixture and combination thereof with drawing dies and press
US3568490A (en) * 1968-09-27 1971-03-09 Fairchild Hiller Corp Method and apparatus for heat forming elongated metal panels
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US3722068A (en) * 1971-02-22 1973-03-27 Northrop Corp Method for forming titanium sheets
US3934441A (en) * 1974-07-08 1976-01-27 Rockwell International Corporation Controlled environment superplastic forming of metals
US3933020A (en) * 1974-07-18 1976-01-20 Tre Corporation Method for stretch wrapping of panels
US3920175A (en) * 1974-10-03 1975-11-18 Rockwell International Corp Method for superplastic forming of metals with concurrent diffusion bonding
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US4011429A (en) * 1975-10-20 1977-03-08 Northrop Corporation Hot stretch-wrap forming with resistance heating
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US4406393A (en) * 1981-03-23 1983-09-27 Rockwell International Corporation Method of making filamentary reinforced metallic structures
FR2620956A1 (en) * 1987-09-29 1989-03-31 Inst Francais Du Petrole METHOD FOR FORMING TITANIUM OR TITANIUM ALLOY SURFACE SHEET ELEMENT
JPH0445817Y2 (en) * 1988-09-09 1992-10-28
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DE10063287B4 (en) * 2000-12-19 2007-05-03 Airbus Deutschland Gmbh Method for forming a metal sheet
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US7669452B2 (en) * 2005-11-04 2010-03-02 Cyril Bath Company Titanium stretch forming apparatus and method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3927817A (en) * 1974-10-03 1975-12-23 Rockwell International Corp Method for making metallic sandwich structures
US4354369A (en) * 1980-05-16 1982-10-19 Rockwell International Corporation Method for superplastic forming

Also Published As

Publication number Publication date
EP2018234A2 (en) 2009-01-28
JP2009536880A (en) 2009-10-22
WO2007133546A2 (en) 2007-11-22
KR20090007601A (en) 2009-01-19
US20070261462A1 (en) 2007-11-15
CN101443138A (en) 2009-05-27

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