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JPS5739037A - Formation for tube - Google Patents

Formation for tube

Info

Publication number
JPS5739037A
JPS5739037A JP11368280A JP11368280A JPS5739037A JP S5739037 A JPS5739037 A JP S5739037A JP 11368280 A JP11368280 A JP 11368280A JP 11368280 A JP11368280 A JP 11368280A JP S5739037 A JPS5739037 A JP S5739037A
Authority
JP
Japan
Prior art keywords
tube
concave part
chuck
bend
arrow
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.)
Pending
Application number
JP11368280A
Other languages
Japanese (ja)
Inventor
Kenji Sato
Takashi Shimoishi
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.)
Yamaha Motor Co Ltd
Yamaha Shatai Kogyo KK
Original Assignee
Yamaha Motor Co Ltd
Yamaha Shatai Kogyo KK
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 Yamaha Motor Co Ltd, Yamaha Shatai Kogyo KK filed Critical Yamaha Motor Co Ltd
Priority to JP11368280A priority Critical patent/JPS5739037A/en
Publication of JPS5739037A publication Critical patent/JPS5739037A/en
Pending legal-status Critical Current

Links

Landscapes

  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

PURPOSE: To prevent generation of creases in a bend by forming a concave part in side of the bend when or prior to bending of a tube.
CONSTITUTION: A tube material 26 is subjected to pressing force and fixed by moving a pusher die 32 in the direction of the arrow P. Next, a chuck 16B is moved in the direction of the arrow Q and thrusted against a block 16A and fixed. The tube material 26 is bent by θ1 by pressing force of the chuck 16B, and a concave part 40 is formed in the inside of the bent part of the tube material 26 by a projection 24 formed on the roll 10 by movement of the pusher 32 in the direction of the arrow P. Then, bending is performed by turning the roll 10 clockwise under the state that the tube material 26 is held by the block 16A and the chuck 16B. As the concave part 40 extends on the inner side of the bend of the tube parallel to the axial line of the tube, generation of creases is prevented by the concave part 40.
COPYRIGHT: (C)1982,JPO&Japio
JP11368280A 1980-08-19 1980-08-19 Formation for tube Pending JPS5739037A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11368280A JPS5739037A (en) 1980-08-19 1980-08-19 Formation for tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11368280A JPS5739037A (en) 1980-08-19 1980-08-19 Formation for tube

Publications (1)

Publication Number Publication Date
JPS5739037A true JPS5739037A (en) 1982-03-04

Family

ID=14618497

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11368280A Pending JPS5739037A (en) 1980-08-19 1980-08-19 Formation for tube

Country Status (1)

Country Link
JP (1) JPS5739037A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070162A1 (en) * 2001-03-07 2002-09-12 Komatsu Ltd. Bending method and bending device for non-circular tube, structural member formed of non-circular tube, and structure using the structural member
JP2006218503A (en) * 2005-02-10 2006-08-24 Nissan Motor Co Ltd Method and apparatus of hydroforming
JP2007185697A (en) * 2006-01-13 2007-07-26 Nippon Steel Corp Metal tube processing method and processing apparatus
JP2008087067A (en) * 2006-10-05 2008-04-17 Sankei Kogyo Kk Method of working metallic pipe
WO2010025883A3 (en) * 2008-09-04 2010-06-17 Uni Siegen Method and bending tool for bending pipes over a mandrel with an adjustable mandrel retainer means beading tool and rotating bending tool with such a beading tool

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53135872A (en) * 1977-04-30 1978-11-27 Mitsuboshi Seisakusho R bending process of double exhaust pipe for internal combustion engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53135872A (en) * 1977-04-30 1978-11-27 Mitsuboshi Seisakusho R bending process of double exhaust pipe for internal combustion engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070162A1 (en) * 2001-03-07 2002-09-12 Komatsu Ltd. Bending method and bending device for non-circular tube, structural member formed of non-circular tube, and structure using the structural member
JP2006218503A (en) * 2005-02-10 2006-08-24 Nissan Motor Co Ltd Method and apparatus of hydroforming
JP2007185697A (en) * 2006-01-13 2007-07-26 Nippon Steel Corp Metal tube processing method and processing apparatus
JP2008087067A (en) * 2006-10-05 2008-04-17 Sankei Kogyo Kk Method of working metallic pipe
WO2010025883A3 (en) * 2008-09-04 2010-06-17 Uni Siegen Method and bending tool for bending pipes over a mandrel with an adjustable mandrel retainer means beading tool and rotating bending tool with such a beading tool

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