JPS57134231A - Formation for conical part - Google Patents

Formation for conical part

Info

Publication number
JPS57134231A
JPS57134231A JP1763081A JP1763081A JPS57134231A JP S57134231 A JPS57134231 A JP S57134231A JP 1763081 A JP1763081 A JP 1763081A JP 1763081 A JP1763081 A JP 1763081A JP S57134231 A JPS57134231 A JP S57134231A
Authority
JP
Japan
Prior art keywords
punch
tip
hole
conical
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
JP1763081A
Other languages
Japanese (ja)
Inventor
Masao Murakoshi
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 JP1763081A priority Critical patent/JPS57134231A/en
Publication of JPS57134231A publication Critical patent/JPS57134231A/en
Pending 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
    • B21K1/00—Making machine elements
    • B21K1/44—Making machine elements bolts, studs, or the like
    • B21K1/46—Making machine elements bolts, studs, or the like with heads

Landscapes

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

Abstract

PURPOSE:To form a conical part having a smooth surface at the end of a material by forming a hole at the center of an end face of a metallic round bar and drawing by applying pressure from outside to inside. CONSTITUTION:An opening 20 of small diameter is formed at the tip of a blank 11 of metallic round bar by using the first die 12 and the first punch 16. At the same time, a hexagonal part 21 is formed in the middle part. Next, a hole 33 of specified depth is formed at the tip 20 of the material 11 with the second die 25 and a punch 29. The second punch 29 is then removed and a conical concave blockage forming part 35 having a hole 38 is pressed and fitted. Further, the peripheral wall 40 of a hole 33 at the opening of the tip of the material is drawn to a conical form and a blocking part 41 as a conical part is formed at the tip of the opening 20. At the same time, the hexagonal part 21 is formed to a perfect shape. Next, the material 11 is taken out from the die and the punch, and protruding burrs of the hexagonal part are removed. Thus, air bleeder screws for automobiles can be manufactured in quantities.
JP1763081A 1981-02-09 1981-02-09 Formation for conical part Pending JPS57134231A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1763081A JPS57134231A (en) 1981-02-09 1981-02-09 Formation for conical part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1763081A JPS57134231A (en) 1981-02-09 1981-02-09 Formation for conical part

Publications (1)

Publication Number Publication Date
JPS57134231A true JPS57134231A (en) 1982-08-19

Family

ID=11949175

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1763081A Pending JPS57134231A (en) 1981-02-09 1981-02-09 Formation for conical part

Country Status (1)

Country Link
JP (1) JPS57134231A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007045512A (en) * 2005-08-12 2007-02-22 Dainippon Printing Co Ltd Composite container

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007045512A (en) * 2005-08-12 2007-02-22 Dainippon Printing Co Ltd Composite container

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