JPS5636320A - Manufacture of steel pipe with polygonal section - Google Patents

Manufacture of steel pipe with polygonal section

Info

Publication number
JPS5636320A
JPS5636320A JP11218279A JP11218279A JPS5636320A JP S5636320 A JPS5636320 A JP S5636320A JP 11218279 A JP11218279 A JP 11218279A JP 11218279 A JP11218279 A JP 11218279A JP S5636320 A JPS5636320 A JP S5636320A
Authority
JP
Japan
Prior art keywords
cone
pipe
segment
polygonal
expander
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
JP11218279A
Other languages
Japanese (ja)
Inventor
Kazuo Kawai
Chihiro Hayashi
Satoshi Kashiwakura
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP11218279A priority Critical patent/JPS5636320A/en
Publication of JPS5636320A publication Critical patent/JPS5636320A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To manufacture the steel pipe with accurate polygonal section shape, by arranging the mechaincal expander provided with the segments divided into number of required angles or more at the outer surface of the cone provided with the inclined plane in the axial direction, and by pressing to shift the cone in the axial direction.
CONSTITUTION: To easily manufacture the polygonal pipe with accurate shape and accurate corners in a small radius. In case of forming the square pipe, for example, the mechaincal expander 1 is constituted as follow; the cone 2 having the wedge type logitudinally inclined plane 3 is placed at the center, and the segment 4 is arranged on the outer surface of the cone 2; hereupon, the segment 4 is divided into the same or more numbers as the number of angles of the desired polygonal pipe P1. The pull rod 7 is firmly set to the cone 2 with the nut 8. The mechanical expander 1 is put in the pipe blank P0, the ring type pressure plate 5 and the tubular outer rod 6 support the end face of the segment 4, the cone 2 is pressed to shift in the arrowed direction, and the outer dimension of the segment 4 is radially expanded to press the pipe blank P0 from inside so as to cause the deformation for finishing the polygonal pipe1.
COPYRIGHT: (C)1981,JPO&Japio
JP11218279A 1979-08-31 1979-08-31 Manufacture of steel pipe with polygonal section Pending JPS5636320A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11218279A JPS5636320A (en) 1979-08-31 1979-08-31 Manufacture of steel pipe with polygonal section

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11218279A JPS5636320A (en) 1979-08-31 1979-08-31 Manufacture of steel pipe with polygonal section

Publications (1)

Publication Number Publication Date
JPS5636320A true JPS5636320A (en) 1981-04-09

Family

ID=14580300

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11218279A Pending JPS5636320A (en) 1979-08-31 1979-08-31 Manufacture of steel pipe with polygonal section

Country Status (1)

Country Link
JP (1) JPS5636320A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60188887U (en) * 1984-05-25 1985-12-14 新明和工業株式会社 Impeller for vortex pump
JPH03285714A (en) * 1990-04-03 1991-12-16 Nippon Steel Corp Forming method for square steel pipe from cylindrical blank tube
JPH0422525A (en) * 1990-05-17 1992-01-27 Nippon Steel Corp Method for forming polygonal steel pipe from cylindrical blank pipe
KR20010048623A (en) * 1999-11-29 2001-06-15 배길훈 Manufacturing method of catalytic converter shell for exhaust system in vehicle
JP2012066268A (en) * 2010-09-22 2012-04-05 Yutaka Giken Co Ltd Method and apparatus for forming deformed cylindrical body
CN107671186A (en) * 2017-11-04 2018-02-09 陈桂芳 A kind of electric tube expander copper pipe flaring machine structure

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60188887U (en) * 1984-05-25 1985-12-14 新明和工業株式会社 Impeller for vortex pump
JPH03285714A (en) * 1990-04-03 1991-12-16 Nippon Steel Corp Forming method for square steel pipe from cylindrical blank tube
JPH0422525A (en) * 1990-05-17 1992-01-27 Nippon Steel Corp Method for forming polygonal steel pipe from cylindrical blank pipe
KR20010048623A (en) * 1999-11-29 2001-06-15 배길훈 Manufacturing method of catalytic converter shell for exhaust system in vehicle
JP2012066268A (en) * 2010-09-22 2012-04-05 Yutaka Giken Co Ltd Method and apparatus for forming deformed cylindrical body
CN107671186A (en) * 2017-11-04 2018-02-09 陈桂芳 A kind of electric tube expander copper pipe flaring machine structure

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