FR2334444A1 - Cold forming tool for recessing screw heads - uses sliding punch pin with tip shaped to produce required cross shape - Google Patents

Cold forming tool for recessing screw heads - uses sliding punch pin with tip shaped to produce required cross shape

Info

Publication number
FR2334444A1
FR2334444A1 FR7531605A FR7531605A FR2334444A1 FR 2334444 A1 FR2334444 A1 FR 2334444A1 FR 7531605 A FR7531605 A FR 7531605A FR 7531605 A FR7531605 A FR 7531605A FR 2334444 A1 FR2334444 A1 FR 2334444A1
Authority
FR
France
Prior art keywords
holder
cold forming
recessing
forming tool
cross shape
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
FR7531605A
Other languages
French (fr)
Other versions
FR2334444B1 (en
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.)
Phillips Screw Co
Original Assignee
Phillips Screw Co
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 Phillips Screw Co filed Critical Phillips Screw Co
Priority to FR7531605A priority Critical patent/FR2334444A1/en
Publication of FR2334444A1 publication Critical patent/FR2334444A1/en
Application granted granted Critical
Publication of FR2334444B1 publication Critical patent/FR2334444B1/fr
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
    • 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
    • B21K1/463—Making machine elements bolts, studs, or the like with heads with recessed heads

Landscapes

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

Abstract

A cold forming tool (60) for forming a recess in the head of a screw has a tip (68) shaped to make a cross shaped recess. This tool slides in a holder (30) and consists of shaft (62) and an enlarged diameter part (64). The holder itself slides in a body (16) containing a piston (40) and fitted with a bushing (32). The holder (30) slides in the bushing against the force of spring (46) and has an arresting pin (34) worki ng in conjunction with a flattened part (36) of the holder (30) to keep the holder from being pushed out from the bushing. The rear face (48) of the holder (3) comes to rest against the corresponding face of the impact block (42) when the tool is pressed home on the screw head.
FR7531605A 1975-10-15 1975-10-15 Cold forming tool for recessing screw heads - uses sliding punch pin with tip shaped to produce required cross shape Granted FR2334444A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7531605A FR2334444A1 (en) 1975-10-15 1975-10-15 Cold forming tool for recessing screw heads - uses sliding punch pin with tip shaped to produce required cross shape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7531605A FR2334444A1 (en) 1975-10-15 1975-10-15 Cold forming tool for recessing screw heads - uses sliding punch pin with tip shaped to produce required cross shape

Publications (2)

Publication Number Publication Date
FR2334444A1 true FR2334444A1 (en) 1977-07-08
FR2334444B1 FR2334444B1 (en) 1980-04-30

Family

ID=9161239

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7531605A Granted FR2334444A1 (en) 1975-10-15 1975-10-15 Cold forming tool for recessing screw heads - uses sliding punch pin with tip shaped to produce required cross shape

Country Status (1)

Country Link
FR (1) FR2334444A1 (en)

Also Published As

Publication number Publication date
FR2334444B1 (en) 1980-04-30

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Legal Events

Date Code Title Description
ST Notification of lapse