JPS5479347A - Method of forming screw head portion - Google Patents

Method of forming screw head portion

Info

Publication number
JPS5479347A
JPS5479347A JP14506577A JP14506577A JPS5479347A JP S5479347 A JPS5479347 A JP S5479347A JP 14506577 A JP14506577 A JP 14506577A JP 14506577 A JP14506577 A JP 14506577A JP S5479347 A JPS5479347 A JP S5479347A
Authority
JP
Japan
Prior art keywords
screw head
head portion
edge
driver
hole
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
JP14506577A
Other languages
Japanese (ja)
Other versions
JPS5950456B2 (en
Inventor
Shigemi Suzuki
Kimio Ide
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP14506577A priority Critical patent/JPS5950456B2/en
Publication of JPS5479347A publication Critical patent/JPS5479347A/en
Publication of JPS5950456B2 publication Critical patent/JPS5950456B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Forging (AREA)

Abstract

PURPOSE: To improve productivity, by shaping an edge for preventing the slipping- off of a nose of a driver from a groove, to which the nose of the driver is fitted, to a screw head portion simply and integrally, in the screw head portion with said groove and said edge.
CONSTITUTION: When working, a hole 13 is penetrated by using a drilling machine in the vertical direction to an axial from a flank 12 of a cylindrical screw head portion 10 - that is, in the redial direction of the screw head portion 10. A concave portion 16 is formed by boring the screw head portion 10 by employing a lathe from an upper portion of a top surface 11. Thus, an edge 14 is integrally shaped with the screw head portion 10. In this case, a location where said hole 13 is formed is made to be height H from the top surface 11, and the height H is approxinately made equal to the height h of the edge 14 while the value of h is set to ensure that a driver inserting hole 13A with depth d is shaped. The diameter D of the hole 13 is approxinately made identical to the thickness of a nose of a driver.
COPYRIGHT: (C)1979,JPO&Japio
JP14506577A 1977-12-05 1977-12-05 How to form the screw head Expired JPS5950456B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14506577A JPS5950456B2 (en) 1977-12-05 1977-12-05 How to form the screw head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14506577A JPS5950456B2 (en) 1977-12-05 1977-12-05 How to form the screw head

Publications (2)

Publication Number Publication Date
JPS5479347A true JPS5479347A (en) 1979-06-25
JPS5950456B2 JPS5950456B2 (en) 1984-12-08

Family

ID=15376557

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14506577A Expired JPS5950456B2 (en) 1977-12-05 1977-12-05 How to form the screw head

Country Status (1)

Country Link
JP (1) JPS5950456B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5479647B1 (en) * 2012-11-26 2014-04-23 千歳自動車工業株式会社 Groove cutting instrument, groove cutting method and jig

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63137389U (en) * 1987-02-27 1988-09-09

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5479647B1 (en) * 2012-11-26 2014-04-23 千歳自動車工業株式会社 Groove cutting instrument, groove cutting method and jig

Also Published As

Publication number Publication date
JPS5950456B2 (en) 1984-12-08

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