JPS55103933A - Molding method of large thickness portion of flanged pipe - Google Patents

Molding method of large thickness portion of flanged pipe

Info

Publication number
JPS55103933A
JPS55103933A JP1185079A JP1185079A JPS55103933A JP S55103933 A JPS55103933 A JP S55103933A JP 1185079 A JP1185079 A JP 1185079A JP 1185079 A JP1185079 A JP 1185079A JP S55103933 A JPS55103933 A JP S55103933A
Authority
JP
Japan
Prior art keywords
mold
large thickness
thickness portion
pipe
extrusion
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
JP1185079A
Other languages
Japanese (ja)
Other versions
JPS5746939B2 (en
Inventor
Koreaki Suzuki
Hideichiro Wakasa
Shinichi Ono
Hideo Iwazawa
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.)
Japan Steel Works Ltd
Original Assignee
Japan Steel Works 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 Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to JP1185079A priority Critical patent/JPS55103933A/en
Publication of JPS55103933A publication Critical patent/JPS55103933A/en
Publication of JPS5746939B2 publication Critical patent/JPS5746939B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Extrusion Of Metal (AREA)
  • Forging (AREA)

Abstract

PURPOSE: To mold a flange and a large thickness portion, which is at the opposite side of the flange, of a flanged pipe without causing the pipe to be constricted, by using as a restriction member a multi-divided cylinder slidingly movable into a mold, whereby an extrusion left-over material is extruded into a large thickness portion molding space in the mold.
CONSTITUTION: After a flange has been molded, a pipe body 1 extruded to obtain a pipe 15 which an extrusion left-over material D remaining in a mold 10. The pipe 15 is inserted into the mold 10 containing the material D therein. An extrusion punch 14 is then forced into the mold 10 to allow the left-over material D to be moved into a large thickness portion molding space 13 until the large thickness portion has a diameter (d). The extrusion punch 14 is further forced into the mold to extrude a large thickness portion T while raising members 12, 12' of a multi-divided cylinder. The molding operation is conducted in the above-described manner. When the tip 14' of the punch 14 passes a joint portion E, a sudden variation in contraction percentage of area may occur. However, the members 12, 12' of multi-divided cylinder work as restriction members. Accordingly, the extruded product is never constricted.
COPYRIGHT: (C)1980,JPO&Japio
JP1185079A 1979-02-06 1979-02-06 Molding method of large thickness portion of flanged pipe Granted JPS55103933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1185079A JPS55103933A (en) 1979-02-06 1979-02-06 Molding method of large thickness portion of flanged pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1185079A JPS55103933A (en) 1979-02-06 1979-02-06 Molding method of large thickness portion of flanged pipe

Publications (2)

Publication Number Publication Date
JPS55103933A true JPS55103933A (en) 1980-08-08
JPS5746939B2 JPS5746939B2 (en) 1982-10-06

Family

ID=11789190

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1185079A Granted JPS55103933A (en) 1979-02-06 1979-02-06 Molding method of large thickness portion of flanged pipe

Country Status (1)

Country Link
JP (1) JPS55103933A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102699090A (en) * 2012-05-17 2012-10-03 太仓奥科机械设备有限公司 Multi-pass connector processing device
CN106583485A (en) * 2016-12-22 2017-04-26 南昌工程学院 Forming method for large-diameter flange air cylinder

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61279948A (en) * 1985-06-05 1986-12-10 Yokogawa Electric Corp Debug device for microprocessor
CA2316449A1 (en) 2000-01-26 2001-07-26 Taiho Industries Co., Ltd. Surface treating device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102699090A (en) * 2012-05-17 2012-10-03 太仓奥科机械设备有限公司 Multi-pass connector processing device
CN106583485A (en) * 2016-12-22 2017-04-26 南昌工程学院 Forming method for large-diameter flange air cylinder

Also Published As

Publication number Publication date
JPS5746939B2 (en) 1982-10-06

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