JPS6453719A - Production of bend pipe - Google Patents

Production of bend pipe

Info

Publication number
JPS6453719A
JPS6453719A JP20731287A JP20731287A JPS6453719A JP S6453719 A JPS6453719 A JP S6453719A JP 20731287 A JP20731287 A JP 20731287A JP 20731287 A JP20731287 A JP 20731287A JP S6453719 A JPS6453719 A JP S6453719A
Authority
JP
Japan
Prior art keywords
forming
outside
advance
forming die
bend pipe
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.)
Granted
Application number
JP20731287A
Other languages
Japanese (ja)
Other versions
JPH0257455B2 (en
Inventor
Terumori Ueda
Tetsuo Yamamoto
Akira Taguchi
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.)
National Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
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 Agency of Industrial Science and Technology filed Critical Agency of Industrial Science and Technology
Priority to JP20731287A priority Critical patent/JPS6453719A/en
Publication of JPS6453719A publication Critical patent/JPS6453719A/en
Publication of JPH0257455B2 publication Critical patent/JPH0257455B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To prevent the crush and thickness reduction of a product by forming a bulging part in advance on the part equivalent to the out side bending part of a blank and executing pressed forming via a core metal between the outside and inside forming dies. CONSTITUTION:A hydraulic bulge forming die 10 is provided in advance and a bulging part 2a is formed at the part equivalent to the outside of a bending part via the compression force by a high liquid pressure P and pressurizing levers 12, 13 on the blank straight pipe. Then formed hollows 23, 26 are respectively formed on an outside forming die 21 and inside forming die 22 and the preforming pipe 2 inserting core metals 28, 28 is set. In this state, an L type bend pipe 3 is subjected to press forming between both forming dies 21, 22 by descending the inside forming die 22 by a press cylinder. Due to the bulging part 2a being formed in advance at the outside part of the bending part, the thickness deviation necessary for the outside forming is executed. Consequently the crush and thickness reduction of a bend pipe 3 are thus prevented.
JP20731287A 1987-08-20 1987-08-20 Production of bend pipe Granted JPS6453719A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20731287A JPS6453719A (en) 1987-08-20 1987-08-20 Production of bend pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20731287A JPS6453719A (en) 1987-08-20 1987-08-20 Production of bend pipe

Publications (2)

Publication Number Publication Date
JPS6453719A true JPS6453719A (en) 1989-03-01
JPH0257455B2 JPH0257455B2 (en) 1990-12-05

Family

ID=16537685

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20731287A Granted JPS6453719A (en) 1987-08-20 1987-08-20 Production of bend pipe

Country Status (1)

Country Link
JP (1) JPS6453719A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0770435A1 (en) * 1995-09-21 1997-05-02 Benteler Ag Method for making a construction part and axle support

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0770435A1 (en) * 1995-09-21 1997-05-02 Benteler Ag Method for making a construction part and axle support

Also Published As

Publication number Publication date
JPH0257455B2 (en) 1990-12-05

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term