JPS5586621A - Reinforcing method for shoulder part of pipe with irregular diameter - Google Patents

Reinforcing method for shoulder part of pipe with irregular diameter

Info

Publication number
JPS5586621A
JPS5586621A JP16211978A JP16211978A JPS5586621A JP S5586621 A JPS5586621 A JP S5586621A JP 16211978 A JP16211978 A JP 16211978A JP 16211978 A JP16211978 A JP 16211978A JP S5586621 A JPS5586621 A JP S5586621A
Authority
JP
Japan
Prior art keywords
pipe material
possessing
swelled
pipe
die
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
JP16211978A
Other languages
Japanese (ja)
Inventor
Masanobu Nakamura
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP16211978A priority Critical patent/JPS5586621A/en
Publication of JPS5586621A publication Critical patent/JPS5586621A/en
Pending legal-status Critical Current

Links

Landscapes

  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

PURPOSE: To prevent the deterioration of strength at the shoulder part, by inserting the required part of the heated pipe material into the cylindrical die possessing diameter slightly larger than that of the pipe material, and by pressing longitudinally in order to form the swelled part at the inner surface of the required part in the pipe material, and then, by giving a radial contraction to the swelled part.
CONSTITUTION: The required part 2 of the pipe material 1 is heated to temperatures higher than the recrystallization temperature, and is inserted into the cylindrical die 4 possessing diameter slightly larger than the outer diameter 3 of the pipe material 1; a longitudinal press load is impressed to the pipe material 1 under the condition that its one end is striking the backing metal 5; hereby, the swelled part 2' is formed in the inner surface of the required part 2 of the pipe material 1. Next, the forming die 7 possessing a shoulder part 6 is fitted to the pipe material 1 from outside in order to execute the bulging work, the press work with the segmented die, etc., the sholder part 8 of the pipe material 1 formed according to this method, is provided with large wall thickness and uniformly distributed stress, so that the sufficient reinforcing effect is attained.
COPYRIGHT: (C)1980,JPO&Japio
JP16211978A 1978-12-25 1978-12-25 Reinforcing method for shoulder part of pipe with irregular diameter Pending JPS5586621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16211978A JPS5586621A (en) 1978-12-25 1978-12-25 Reinforcing method for shoulder part of pipe with irregular diameter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16211978A JPS5586621A (en) 1978-12-25 1978-12-25 Reinforcing method for shoulder part of pipe with irregular diameter

Publications (1)

Publication Number Publication Date
JPS5586621A true JPS5586621A (en) 1980-06-30

Family

ID=15748394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16211978A Pending JPS5586621A (en) 1978-12-25 1978-12-25 Reinforcing method for shoulder part of pipe with irregular diameter

Country Status (1)

Country Link
JP (1) JPS5586621A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4862660A (en) * 1971-12-06 1973-09-01
JPS4921221U (en) * 1972-05-25 1974-02-22

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4862660A (en) * 1971-12-06 1973-09-01
JPS4921221U (en) * 1972-05-25 1974-02-22

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