JPS63230222A - Manufacture of dissimilar pipe - Google Patents

Manufacture of dissimilar pipe

Info

Publication number
JPS63230222A
JPS63230222A JP6229787A JP6229787A JPS63230222A JP S63230222 A JPS63230222 A JP S63230222A JP 6229787 A JP6229787 A JP 6229787A JP 6229787 A JP6229787 A JP 6229787A JP S63230222 A JPS63230222 A JP S63230222A
Authority
JP
Japan
Prior art keywords
pipe
product
outer diameter
die
stand
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
JP6229787A
Other languages
Japanese (ja)
Other versions
JPH08254B2 (en
Inventor
Masayasu Kojima
Kyoji Nakao
Keizo Takahashi
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
Benkan Kikoh Corp
Original Assignee
Sumitomo Metal Industries Ltd
Sumikin Kikoh Co 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, Sumikin Kikoh Co Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP6229787A priority Critical patent/JPH08254B2/en
Publication of JPS63230222A publication Critical patent/JPS63230222A/en
Publication of JPH08254B2 publication Critical patent/JPH08254B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE: To improve the accuracy in a product and to reduce manufacturing cost by subjecting both ends of pipe stock with circular crosssection to drawing up to the end part outer diameter of a product pipe and performing rough forming and finishing forming by pushing them into a loosely rolling roll stand.
CONSTITUTION: The circular sectional pipe stock 11 having the outer peripheral length larger than that of the angular sectional part of a product dissimilar pipe is prepd. and set to a pair of the right and left drawing dies 12 to perform the drawing of both end parts by a pressurizing device. The die hole 13 of the die 12 is made equal to the outer diameter D of the product pipe end at its outlet port and to the outer diameter D0 of the pipe stock 11 at its inlet port. The semi-product pipe subjected to drawing is then roll-formed in angular sectional shape at its large diameter part at the rough forming stand 18-1 having four loosely rolling rolls to perform finishing forming at the similar finishing stand. Since a punch, die, etc. are disused and no springback is caused as well the dimentional accuracy of a product is improved and manufacturing cost is reduced.
COPYRIGHT: (C)1988,JPO&Japio
JP6229787A 1987-03-16 1987-03-16 Shaped tube manufacturing method Expired - Fee Related JPH08254B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6229787A JPH08254B2 (en) 1987-03-16 1987-03-16 Shaped tube manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6229787A JPH08254B2 (en) 1987-03-16 1987-03-16 Shaped tube manufacturing method

Publications (2)

Publication Number Publication Date
JPS63230222A true JPS63230222A (en) 1988-09-26
JPH08254B2 JPH08254B2 (en) 1996-01-10

Family

ID=13196043

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6229787A Expired - Fee Related JPH08254B2 (en) 1987-03-16 1987-03-16 Shaped tube manufacturing method

Country Status (1)

Country Link
JP (1) JPH08254B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013119103A (en) * 2011-12-07 2013-06-17 Somic Ishikawa Inc Method for manufacturing arm
CN113617943A (en) * 2021-08-25 2021-11-09 燕山大学 Drawing die for rectangular-section deep-cylinder thin-wall metal part and machining process thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013119103A (en) * 2011-12-07 2013-06-17 Somic Ishikawa Inc Method for manufacturing arm
CN113617943A (en) * 2021-08-25 2021-11-09 燕山大学 Drawing die for rectangular-section deep-cylinder thin-wall metal part and machining process thereof

Also Published As

Publication number Publication date
JPH08254B2 (en) 1996-01-10

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees