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JPS549149A - Method of controlling apparatus for uniformly expanding pipe - Google Patents

Method of controlling apparatus for uniformly expanding pipe

Info

Publication number
JPS549149A
JPS549149A JP7433777A JP7433777A JPS549149A JP S549149 A JPS549149 A JP S549149A JP 7433777 A JP7433777 A JP 7433777A JP 7433777 A JP7433777 A JP 7433777A JP S549149 A JPS549149 A JP S549149A
Authority
JP
Japan
Prior art keywords
controlling apparatus
expanding pipe
uniformly expanding
liquid pressure
point
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
JP7433777A
Other languages
Japanese (ja)
Inventor
Takao Okamura
Tomio Kubota
Tadashi Takada
Keiji Omura
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 JP7433777A priority Critical patent/JPS549149A/en
Publication of JPS549149A publication Critical patent/JPS549149A/en
Pending legal-status Critical Current

Links

Landscapes

  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

PURPOSE: To accomplish an prompt, easy working of pipe expansion through automatic switchin gof liquid pressure to the releasing point in a certain time after a specified value of the liquid pressure reached in supply to the expansion point.
COPYRIGHT: (C)1979,JPO&Japio
JP7433777A 1977-06-24 1977-06-24 Method of controlling apparatus for uniformly expanding pipe Pending JPS549149A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7433777A JPS549149A (en) 1977-06-24 1977-06-24 Method of controlling apparatus for uniformly expanding pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7433777A JPS549149A (en) 1977-06-24 1977-06-24 Method of controlling apparatus for uniformly expanding pipe

Publications (1)

Publication Number Publication Date
JPS549149A true JPS549149A (en) 1979-01-23

Family

ID=13544195

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7433777A Pending JPS549149A (en) 1977-06-24 1977-06-24 Method of controlling apparatus for uniformly expanding pipe

Country Status (1)

Country Link
JP (1) JPS549149A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5641033A (en) * 1979-09-14 1981-04-17 Hitachi Ltd Pipe expanding device
JPS5650734A (en) * 1979-10-01 1981-05-08 Hitachi Ltd Method and device for automatic operation of uniform pipe expanding apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5641033A (en) * 1979-09-14 1981-04-17 Hitachi Ltd Pipe expanding device
JPS5650734A (en) * 1979-10-01 1981-05-08 Hitachi Ltd Method and device for automatic operation of uniform pipe expanding apparatus
JPH0215295B2 (en) * 1979-10-01 1990-04-11 Hitachi Ltd

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