WO2008142370A3 - Forming multi-walled components - Google Patents

Forming multi-walled components Download PDF

Info

Publication number
WO2008142370A3
WO2008142370A3 PCT/GB2008/001641 GB2008001641W WO2008142370A3 WO 2008142370 A3 WO2008142370 A3 WO 2008142370A3 GB 2008001641 W GB2008001641 W GB 2008001641W WO 2008142370 A3 WO2008142370 A3 WO 2008142370A3
Authority
WO
WIPO (PCT)
Prior art keywords
wall
fluid pressure
forming multi
blank
walled components
Prior art date
Application number
PCT/GB2008/001641
Other languages
French (fr)
Other versions
WO2008142370A2 (en
Inventor
Paul Stuart Slater
Original Assignee
Extex Ltd Liability Partnershi
Paul Stuart Slater
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 Extex Ltd Liability Partnershi, Paul Stuart Slater filed Critical Extex Ltd Liability Partnershi
Publication of WO2008142370A2 publication Critical patent/WO2008142370A2/en
Publication of WO2008142370A3 publication Critical patent/WO2008142370A3/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
    • 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
    • B21D26/051—Deforming double-walled bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • F01N13/141—Double-walled exhaust pipes or housings

Abstract

A method of forming a component having a plurality of walls comprises placing a blank (26) opposite a forming surface (14) of a die (10). The blank (26) comprises an outer wall (30) and an inner wall (28) in mutual contact between an inner side of the outer wall (30) and an outer side of the inner wall (28). Fluid pressure is applied to the inner side of the outer wall (30) to separate the outer wall (30) from the inner wall (28) and to form the outer wall (30) against the forming surface (14) while applying substantially equal fluid pressure to inner and outer sides of the inner wall (28), thus defining a gap between the inner and outer walls (28, 30). Fluid pressure is applied to the outer wall (30) through an aperture defined by an overlap portion (32) of the outer wall (30) extending outwardly beyond an edge of the inner wall (28) to an edge of the outer wall (30).
PCT/GB2008/001641 2007-05-22 2008-05-12 Forming multi-walled components WO2008142370A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0709826A GB2449458B (en) 2007-05-22 2007-05-22 Forming multi-walled components
GB0709826.2 2007-05-22

Publications (2)

Publication Number Publication Date
WO2008142370A2 WO2008142370A2 (en) 2008-11-27
WO2008142370A3 true WO2008142370A3 (en) 2009-01-15

Family

ID=38265176

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2008/001641 WO2008142370A2 (en) 2007-05-22 2008-05-12 Forming multi-walled components

Country Status (2)

Country Link
GB (1) GB2449458B (en)
WO (1) WO2008142370A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106269978B (en) * 2016-08-25 2019-01-25 宁波市沃瑞斯机械科技有限公司 A kind of metal bi multiple tube and its manufacture craft
CN106363070B (en) * 2016-08-25 2018-08-17 宁波市沃瑞斯机械科技有限公司 A kind of processing technology of metal bi multiple tube

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4019899C1 (en) * 1990-06-22 1991-12-19 Benteler Ag, 4790 Paderborn, De
US5170557A (en) * 1991-05-01 1992-12-15 Benteler Industries, Inc. Method of forming a double wall, air gap exhaust duct component
JPH1052721A (en) * 1996-08-08 1998-02-24 Sango Co Ltd Manufacture of double tube
US5836065A (en) * 1995-08-31 1998-11-17 Benteler Automotive Corporation Extended jacket end, double expansion hydroforming

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5363544A (en) * 1993-05-20 1994-11-15 Benteler Industries, Inc. Multi-stage dual wall hydroforming
US6254488B1 (en) * 1999-07-13 2001-07-03 Daimlerchrysler Corporation Hydroformed drive shaft and method of making the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4019899C1 (en) * 1990-06-22 1991-12-19 Benteler Ag, 4790 Paderborn, De
US5170557A (en) * 1991-05-01 1992-12-15 Benteler Industries, Inc. Method of forming a double wall, air gap exhaust duct component
US5836065A (en) * 1995-08-31 1998-11-17 Benteler Automotive Corporation Extended jacket end, double expansion hydroforming
JPH1052721A (en) * 1996-08-08 1998-02-24 Sango Co Ltd Manufacture of double tube

Also Published As

Publication number Publication date
GB2449458B (en) 2009-04-29
GB2449458A (en) 2008-11-26
WO2008142370A2 (en) 2008-11-27
GB0709826D0 (en) 2007-07-04

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