JPS57103741A - Method for stepping constriction work of pipe material - Google Patents

Method for stepping constriction work of pipe material

Info

Publication number
JPS57103741A
JPS57103741A JP18046880A JP18046880A JPS57103741A JP S57103741 A JPS57103741 A JP S57103741A JP 18046880 A JP18046880 A JP 18046880A JP 18046880 A JP18046880 A JP 18046880A JP S57103741 A JPS57103741 A JP S57103741A
Authority
JP
Japan
Prior art keywords
pipe
pipe material
small diameter
die
diameter part
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
JP18046880A
Other languages
Japanese (ja)
Inventor
Hiroshi Kobayashi
Tomiji Umemura
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.)
UMEMURA KOGYO KK
Mitsubishi Heavy Industries Ltd
Original Assignee
UMEMURA KOGYO KK
Mitsubishi Heavy Industries 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 UMEMURA KOGYO KK, Mitsubishi Heavy Industries Ltd filed Critical UMEMURA KOGYO KK
Priority to JP18046880A priority Critical patent/JPS57103741A/en
Publication of JPS57103741A publication Critical patent/JPS57103741A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make a step part at right angles in the stepping constriction work of a pipe material, by forming the pipe material into a stepped pipe having a small diameter part and constricting the pipe material by a die, which has a step part perpendicular to the axial line, while applying pressure to the end face of the small diameter part in the axial direction.
CONSTITUTION: Not only the number of rotations of a pipe material 5 is controlled but also a die 6 whose sliding speed is controlled is caused to approach the pipe material 5 to form a small diameter part 7a of a prescribed length by the primary constriction work. While applying a load from the end face of the small diameter part 7a of a blank pipe 7 formed in this manner in the axial direction by a pressure applying device 9, the sliding speed of a die 8 where a step part is formed on a plane perpendicular to the axial direction of the blank pipe 7 is controlled to cause the die 8 to approach the blank pipe 7 for the secondary constriction work. In respect to a product 4 subjected to the secondary constriction work, a step part 4b has a face perpendicular to the axial direction of the pipe 4 and is connected to the small diameter part 4a.
COPYRIGHT: (C)1982,JPO&Japio
JP18046880A 1980-12-22 1980-12-22 Method for stepping constriction work of pipe material Pending JPS57103741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18046880A JPS57103741A (en) 1980-12-22 1980-12-22 Method for stepping constriction work of pipe material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18046880A JPS57103741A (en) 1980-12-22 1980-12-22 Method for stepping constriction work of pipe material

Publications (1)

Publication Number Publication Date
JPS57103741A true JPS57103741A (en) 1982-06-28

Family

ID=16083742

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18046880A Pending JPS57103741A (en) 1980-12-22 1980-12-22 Method for stepping constriction work of pipe material

Country Status (1)

Country Link
JP (1) JPS57103741A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5546647A (en) * 1993-04-06 1996-08-20 Pruna; Alberto N. Method of making an ejector tube for molds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5546647A (en) * 1993-04-06 1996-08-20 Pruna; Alberto N. Method of making an ejector tube for molds

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