JPS531374A - Producting method of continuous sp iral fin - Google Patents

Producting method of continuous sp iral fin

Info

Publication number
JPS531374A
JPS531374A JP7552376A JP7552376A JPS531374A JP S531374 A JPS531374 A JP S531374A JP 7552376 A JP7552376 A JP 7552376A JP 7552376 A JP7552376 A JP 7552376A JP S531374 A JPS531374 A JP S531374A
Authority
JP
Japan
Prior art keywords
continuous
iral
fin
producting method
producting
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
JP7552376A
Other languages
Japanese (ja)
Inventor
Shizuo Hyodo
Tadashi Sato
Makoto Kikuchi
Toyohiro Toida
Noboru Sakairi
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 JP7552376A priority Critical patent/JPS531374A/en
Publication of JPS531374A publication Critical patent/JPS531374A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To produce a continuous spiral fin extremely simply without creases by continuously spirally cutting out the end of a metal pipe axially while rotating the pipe.
COPYRIGHT: (C)1978,JPO&Japio
JP7552376A 1976-06-28 1976-06-28 Producting method of continuous sp iral fin Pending JPS531374A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7552376A JPS531374A (en) 1976-06-28 1976-06-28 Producting method of continuous sp iral fin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7552376A JPS531374A (en) 1976-06-28 1976-06-28 Producting method of continuous sp iral fin

Publications (1)

Publication Number Publication Date
JPS531374A true JPS531374A (en) 1978-01-09

Family

ID=13578666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7552376A Pending JPS531374A (en) 1976-06-28 1976-06-28 Producting method of continuous sp iral fin

Country Status (1)

Country Link
JP (1) JPS531374A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4937461A (en) * 1972-08-11 1974-04-08

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4937461A (en) * 1972-08-11 1974-04-08

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