JPS57160543A - Cold forging method of hollow cylindrical body - Google Patents

Cold forging method of hollow cylindrical body

Info

Publication number
JPS57160543A
JPS57160543A JP4760481A JP4760481A JPS57160543A JP S57160543 A JPS57160543 A JP S57160543A JP 4760481 A JP4760481 A JP 4760481A JP 4760481 A JP4760481 A JP 4760481A JP S57160543 A JPS57160543 A JP S57160543A
Authority
JP
Japan
Prior art keywords
cylindrical body
dies
projecting part
punch
ejector
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
JP4760481A
Other languages
Japanese (ja)
Other versions
JPS6358661B2 (en
Inventor
Terumoto Yamaguchi
Katsumi Kimura
Satoru Nagano
Ichiro Hattori
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.)
Tokai Rika Co Ltd
Original Assignee
Tokai Rika 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 Tokai Rika Co Ltd filed Critical Tokai Rika Co Ltd
Priority to JP4760481A priority Critical patent/JPS57160543A/en
Publication of JPS57160543A publication Critical patent/JPS57160543A/en
Publication of JPS6358661B2 publication Critical patent/JPS6358661B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/08—Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

PURPOSE:To prevent a trouble such as seizure of dies, breakdown of a punch, etc., by piercing a through-hole on a projecting part of a rough cylindrical body formed by composite extrusion, and subsequently, forming a tapered part on said projecting part. CONSTITUTION:A material M of prescribed dimensions is set to a fixed position in dies 11, a stepped punch 2 is made to go down from the upper part, simultaneously a ram 32 is made to go up from an ejector 31, and a rough cylindrical body M4 on which a linear projecting part C has been formed by means of composite extrusion is pressed and molded. Subsequently, a punch 2c being somewhat thick is made to go down to said rough cylindrical body M4, and an intermediate rough cylindrical body M5 which has pierced a short through-hole D on said projecting part C is pressed and molded. Subsequently, said intermediate rough cylindrical body M5 is taken out from the dies 11 by making the ejector 11 go up, is inserted into dies 12 for molding a finished cylindrical body, which has been prepared separately, and said linear projecting part C is formed to a tapered part E by making the punch 2 go down. After that, a finished cylindrical body M6 is taken out from the dies 12 by making an ejector 33 go up.
JP4760481A 1981-03-31 1981-03-31 Cold forging method of hollow cylindrical body Granted JPS57160543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4760481A JPS57160543A (en) 1981-03-31 1981-03-31 Cold forging method of hollow cylindrical body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4760481A JPS57160543A (en) 1981-03-31 1981-03-31 Cold forging method of hollow cylindrical body

Publications (2)

Publication Number Publication Date
JPS57160543A true JPS57160543A (en) 1982-10-02
JPS6358661B2 JPS6358661B2 (en) 1988-11-16

Family

ID=12779835

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4760481A Granted JPS57160543A (en) 1981-03-31 1981-03-31 Cold forging method of hollow cylindrical body

Country Status (1)

Country Link
JP (1) JPS57160543A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59199142A (en) * 1983-04-27 1984-11-12 Tokai Rika Co Ltd Cold forging method of hollow cylindrical body

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0232957U (en) * 1988-08-19 1990-03-01

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59199142A (en) * 1983-04-27 1984-11-12 Tokai Rika Co Ltd Cold forging method of hollow cylindrical body
JPH0258020B2 (en) * 1983-04-27 1990-12-06 Tokai Rika Co Ltd

Also Published As

Publication number Publication date
JPS6358661B2 (en) 1988-11-16

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