JPS5586624A - Bending method for pipe - Google Patents

Bending method for pipe

Info

Publication number
JPS5586624A
JPS5586624A JP15742878A JP15742878A JPS5586624A JP S5586624 A JPS5586624 A JP S5586624A JP 15742878 A JP15742878 A JP 15742878A JP 15742878 A JP15742878 A JP 15742878A JP S5586624 A JPS5586624 A JP S5586624A
Authority
JP
Japan
Prior art keywords
pipe
wall thickness
value
annealing treatment
make
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
JP15742878A
Other languages
Japanese (ja)
Other versions
JPS5613530B2 (en
Inventor
Kazuo Sato
Soji Takahashi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15742878A priority Critical patent/JPS5586624A/en
Publication of JPS5586624A publication Critical patent/JPS5586624A/en
Publication of JPS5613530B2 publication Critical patent/JPS5613530B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To prevent the irregular distribution of wall thickness in the bend pipe, by applying the cold drawing and annealing treatment so as to make the Lankford value Rp of the straight pipe blank to be bent to be higher than a specified value.
CONSTITUTION: When bending the metallic straight pipe made of copper, steel, aluminum, etc., into a U-type, the pipe blank is previously subjected to the cold drawing and annealing treatment so as to make the Lankford value Rp of the pipe blank to be higher than the value, 0.6+5.8(To/Do), in which To and Do respectively mean the wall thickness and outer diameter of the pipe balnk. According to this method, the phenomenon generating irregular distribution of the wall thickness, like as the thinner thickness on the outer side and thicker on the inner side in the bend pipe, can be avoided.
COPYRIGHT: (C)1980,JPO&Japio
JP15742878A 1978-12-22 1978-12-22 Bending method for pipe Granted JPS5586624A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15742878A JPS5586624A (en) 1978-12-22 1978-12-22 Bending method for pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15742878A JPS5586624A (en) 1978-12-22 1978-12-22 Bending method for pipe

Publications (2)

Publication Number Publication Date
JPS5586624A true JPS5586624A (en) 1980-06-30
JPS5613530B2 JPS5613530B2 (en) 1981-03-28

Family

ID=15649412

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15742878A Granted JPS5586624A (en) 1978-12-22 1978-12-22 Bending method for pipe

Country Status (1)

Country Link
JP (1) JPS5586624A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006272451A (en) * 2005-03-30 2006-10-12 Honda Motor Co Ltd Metal bent pipe having cross-sectional shape for parts and method of manufacturing the same
JP2007029961A (en) * 2005-07-22 2007-02-08 Nippon Steel Corp Strain estimation apparatus, method, program, and recording medium in rotary pull bending method
JP2007029997A (en) * 2005-07-27 2007-02-08 Nippon Steel Corp Rotary draw bending control device, method, computer program, and computer-readable recording medium
CN103747546A (en) * 2014-01-17 2014-04-23 华能无锡电热器材有限公司 U-shaped electric heating tube

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58171707U (en) * 1982-05-13 1983-11-16 ヤンマー農機株式会社 Rice transplanter wheel length adjustment device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006272451A (en) * 2005-03-30 2006-10-12 Honda Motor Co Ltd Metal bent pipe having cross-sectional shape for parts and method of manufacturing the same
JP2007029961A (en) * 2005-07-22 2007-02-08 Nippon Steel Corp Strain estimation apparatus, method, program, and recording medium in rotary pull bending method
JP2007029997A (en) * 2005-07-27 2007-02-08 Nippon Steel Corp Rotary draw bending control device, method, computer program, and computer-readable recording medium
CN103747546A (en) * 2014-01-17 2014-04-23 华能无锡电热器材有限公司 U-shaped electric heating tube

Also Published As

Publication number Publication date
JPS5613530B2 (en) 1981-03-28

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