JPS5677033A - Pipe expanding method - Google Patents

Pipe expanding method

Info

Publication number
JPS5677033A
JPS5677033A JP15387779A JP15387779A JPS5677033A JP S5677033 A JPS5677033 A JP S5677033A JP 15387779 A JP15387779 A JP 15387779A JP 15387779 A JP15387779 A JP 15387779A JP S5677033 A JPS5677033 A JP S5677033A
Authority
JP
Japan
Prior art keywords
pipe
end part
straightness
roundness
expanded
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
JP15387779A
Other languages
Japanese (ja)
Inventor
Atsushi Fujino
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 JP15387779A priority Critical patent/JPS5677033A/en
Publication of JPS5677033A publication Critical patent/JPS5677033A/en
Pending legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

PURPOSE: To lubricatively expand the inside surface of pipe end part based on measured values and improve the dimensional accuracy of the end part of a large- diameter part by expanding the central part of a pipe and measuring the roundness and straightness of the pipe end part not expanded.
CONSTITUTION: First, the central part 4 of a steel pipe 1 is expanded half by half from the right and left by a pipe expander 5 to release the residual stress in the central part 4. Next, in the state that the pipe expanding head 7 provided to the end of the pull rod 6 in the pipe expander 5 is held inserted, the roundness and straightness of the unexpanded pipe end part 3 are measured with a roundness measuring device 8 and a straightness measuring device 9. Thence, based on the measured values, the head 7 is moved in the axial direction of the pipe 1 by way of a control unit. At this time, the pipe end part 3 is expanded while it is being lubricated from the inside by synchronizing the opening and closing of the lubricating oil injection nozzle 11 of the lubricating device 10 of the head 7.
COPYRIGHT: (C)1981,JPO&Japio
JP15387779A 1979-11-28 1979-11-28 Pipe expanding method Pending JPS5677033A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15387779A JPS5677033A (en) 1979-11-28 1979-11-28 Pipe expanding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15387779A JPS5677033A (en) 1979-11-28 1979-11-28 Pipe expanding method

Publications (1)

Publication Number Publication Date
JPS5677033A true JPS5677033A (en) 1981-06-25

Family

ID=15572055

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15387779A Pending JPS5677033A (en) 1979-11-28 1979-11-28 Pipe expanding method

Country Status (1)

Country Link
JP (1) JPS5677033A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6015029A (en) * 1983-07-06 1985-01-25 Nippon Kokan Kk <Nkk> Controlling method of lateral bending for mechanical expander
WO2013075626A1 (en) * 2011-11-24 2013-05-30 贵州安大航空锻造有限责任公司 Method for hot bulge-forming titanium alloy irregularly-shaped ring-rolled workpiece
WO2015032228A1 (en) * 2013-09-05 2015-03-12 无锡双友石化机械有限公司 Expanding head support ring oil path system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6015029A (en) * 1983-07-06 1985-01-25 Nippon Kokan Kk <Nkk> Controlling method of lateral bending for mechanical expander
JPH0248335B2 (en) * 1983-07-06 1990-10-24 Nippon Kokan Kk
WO2013075626A1 (en) * 2011-11-24 2013-05-30 贵州安大航空锻造有限责任公司 Method for hot bulge-forming titanium alloy irregularly-shaped ring-rolled workpiece
WO2015032228A1 (en) * 2013-09-05 2015-03-12 无锡双友石化机械有限公司 Expanding head support ring oil path system

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