JPS5641041A - Spherical face forming method of end face of screw blank material - Google Patents
Spherical face forming method of end face of screw blank materialInfo
- Publication number
- JPS5641041A JPS5641041A JP11574479A JP11574479A JPS5641041A JP S5641041 A JPS5641041 A JP S5641041A JP 11574479 A JP11574479 A JP 11574479A JP 11574479 A JP11574479 A JP 11574479A JP S5641041 A JPS5641041 A JP S5641041A
- Authority
- JP
- Japan
- Prior art keywords
- face
- blank material
- cut
- screw blank
- spherical
- 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
Links
Landscapes
- Forging (AREA)
Abstract
PURPOSE: To obtain a spherical face of high surface roughness with good efficiency by once forming the cut face of a blank material into a concave shape then applying predetermined cold forging thereto.
CONSTITUTION: A screw blank material 1a of a predetermined length is cut from a coil material. This is then mounted to the set hole 10 of a die 9 and the cut face 1' is preliminarily formed by a punch 12 of a conically shaped tip to a concave face 13 to expose the new blank surface 14. Thence, the blank material 1d after the preliminary molding is mounted in the set hole of a die 13 and the end face 1' is subjected to cold working by a finishing punch 16 having a concave spherical face 15 of a radius R3 so that the convex spherical face of a radius R3 is formed. After this, an ejector rod 19 is pushed up to extract the screw blank material 1e, which is then remove of burr 18 by finishing.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11574479A JPS5641041A (en) | 1979-09-11 | 1979-09-11 | Spherical face forming method of end face of screw blank material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11574479A JPS5641041A (en) | 1979-09-11 | 1979-09-11 | Spherical face forming method of end face of screw blank material |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5641041A true JPS5641041A (en) | 1981-04-17 |
Family
ID=14669976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11574479A Pending JPS5641041A (en) | 1979-09-11 | 1979-09-11 | Spherical face forming method of end face of screw blank material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5641041A (en) |
-
1979
- 1979-09-11 JP JP11574479A patent/JPS5641041A/en active Pending
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