JPS57160544A - Cold forging method of hollow cylindrical body - Google Patents

Cold forging method of hollow cylindrical body

Info

Publication number
JPS57160544A
JPS57160544A JP4760581A JP4760581A JPS57160544A JP S57160544 A JPS57160544 A JP S57160544A JP 4760581 A JP4760581 A JP 4760581A JP 4760581 A JP4760581 A JP 4760581A JP S57160544 A JPS57160544 A JP S57160544A
Authority
JP
Japan
Prior art keywords
cylindrical body
projecting part
dies
punch
molded
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
JP4760581A
Other languages
Japanese (ja)
Other versions
JPS6358662B2 (en
Inventor
Ichiro Hattori
Toshiaki Yamashita
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 JP4760581A priority Critical patent/JPS57160544A/en
Publication of JPS57160544A publication Critical patent/JPS57160544A/en
Publication of JPS6358662B2 publication Critical patent/JPS6358662B2/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, further extruding said projecting part forward, and extending it. CONSTITUTION:A material M is set to a fixed position in dies 11, a 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 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 the rough cylindrical body M4, and an intermediate rough cylindrical body M5 which has pierced a through-hole B is pressed and molded. Subsequently, the intermediate rough cylindrical body M5 is taken out from the dies 11 by making the ejector 31 go up, is inserted into dies 12 for molding a finished cylindrical body, which has been prepared separately, the punch 2 which has projected a stepped snap 2a is made to go down, and a finished cylindrical body M6 which has extended said projecting part C by extruding it forward is pressed and molded. In this case, the outside circumferential surface of an extended projecting part D is tapered E.
JP4760581A 1981-03-31 1981-03-31 Cold forging method of hollow cylindrical body Granted JPS57160544A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4760581A JPS57160544A (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
JP4760581A JPS57160544A (en) 1981-03-31 1981-03-31 Cold forging method of hollow cylindrical body

Publications (2)

Publication Number Publication Date
JPS57160544A true JPS57160544A (en) 1982-10-02
JPS6358662B2 JPS6358662B2 (en) 1988-11-16

Family

ID=12779863

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4760581A Granted JPS57160544A (en) 1981-03-31 1981-03-31 Cold forging method of hollow cylindrical body

Country Status (1)

Country Link
JP (1) JPS57160544A (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
JPH04247252A (en) * 1991-02-04 1992-09-03 Iwata Air Compressor Mfg Co Ltd Low-pressure wide-angle pattern spray gun

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
JPS6358662B2 (en) 1988-11-16

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