JPS5540042A - Fabricating method of fine groove in inside surface of u-pipe - Google Patents

Fabricating method of fine groove in inside surface of u-pipe

Info

Publication number
JPS5540042A
JPS5540042A JP11221578A JP11221578A JPS5540042A JP S5540042 A JPS5540042 A JP S5540042A JP 11221578 A JP11221578 A JP 11221578A JP 11221578 A JP11221578 A JP 11221578A JP S5540042 A JPS5540042 A JP S5540042A
Authority
JP
Japan
Prior art keywords
pipe
tools
rods
rolling
inside surface
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
JP11221578A
Other languages
English (en)
Japanese (ja)
Other versions
JPS628246B2 (enExample
Inventor
Katsuji Uehara
Izumi Ochiai
Masahiro Miyagi
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 JP11221578A priority Critical patent/JPS5540042A/ja
Publication of JPS5540042A publication Critical patent/JPS5540042A/ja
Publication of JPS628246B2 publication Critical patent/JPS628246B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Metal Extraction Processes (AREA)
JP11221578A 1978-09-14 1978-09-14 Fabricating method of fine groove in inside surface of u-pipe Granted JPS5540042A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11221578A JPS5540042A (en) 1978-09-14 1978-09-14 Fabricating method of fine groove in inside surface of u-pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11221578A JPS5540042A (en) 1978-09-14 1978-09-14 Fabricating method of fine groove in inside surface of u-pipe

Publications (2)

Publication Number Publication Date
JPS5540042A true JPS5540042A (en) 1980-03-21
JPS628246B2 JPS628246B2 (enExample) 1987-02-21

Family

ID=14581128

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11221578A Granted JPS5540042A (en) 1978-09-14 1978-09-14 Fabricating method of fine groove in inside surface of u-pipe

Country Status (1)

Country Link
JP (1) JPS5540042A (enExample)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5317545A (en) * 1976-08-02 1978-02-17 Toyota Motor Co Ltd Spot welding machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5317545A (en) * 1976-08-02 1978-02-17 Toyota Motor Co Ltd Spot welding machine

Also Published As

Publication number Publication date
JPS628246B2 (enExample) 1987-02-21

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