JPS5770047A - Method for forming self-tap forming screw - Google Patents
Method for forming self-tap forming screwInfo
- Publication number
- JPS5770047A JPS5770047A JP14742780A JP14742780A JPS5770047A JP S5770047 A JPS5770047 A JP S5770047A JP 14742780 A JP14742780 A JP 14742780A JP 14742780 A JP14742780 A JP 14742780A JP S5770047 A JPS5770047 A JP S5770047A
- Authority
- JP
- Japan
- Prior art keywords
- shaft section
- shaped shaft
- area
- screw
- pillar
- 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
Links
Abstract
PURPOSE: To improve the screw-in torque characteristic and to rationalize the advancing attitude of the screw by forming a specified number of flat zones in an area covering the truncated cone-shaped shaft section and the pillar-shaped shaft section, and by transferring the male screw thread to the whole area of base materials for the screw except the end part of the truncated cone-shaped saft section.
CONSTITUTION: Three flat zones 16 are formed at regular intervals in the direction of the circumference and in parallel to the axis of a base material 10 in an area extended from the upper part of an end part of a shaft 15 to a part of a pillar- shaped shaft section 11, by leaving the end part 15 at the end section of a truncated cone-shaped shaft section 14 untouched. In the turncated cone-shaped shaft section 14, the first deltoid area 17 is formed, and, in the pillar-shaped shaft section 11, a rectangular area 18 which is extended along the direction of the axis and the second deltoid area 19 are formed. Then, male screw threads 20 are transferred to the whole area of the truncated cone-shaped shaft section 14 and the pillar-shaped shaft section 11 except the end part 15. Therefore, male threads 21 for cutting the first preparatory female screw are transferred to the truncated cone-shaped shaft section 14 between the first deltoid areas 17, and male threads 22 for cutting the second preparatory female screw are transferred to the pillar-shaped shaft section 11 between rectangular areas 18. Moreover, male threads 22' for cutting the third female screw are transferred to the second deltoid area 19.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14742780A JPS5920410B2 (en) | 1980-10-21 | 1980-10-21 | Forming method for self-tap forming screws |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14742780A JPS5920410B2 (en) | 1980-10-21 | 1980-10-21 | Forming method for self-tap forming screws |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5770047A true JPS5770047A (en) | 1982-04-30 |
| JPS5920410B2 JPS5920410B2 (en) | 1984-05-12 |
Family
ID=15430064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14742780A Expired JPS5920410B2 (en) | 1980-10-21 | 1980-10-21 | Forming method for self-tap forming screws |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5920410B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0615800A1 (en) * | 1993-03-17 | 1994-09-21 | Former | Screw with ogive point and process for its production |
| JP2008095773A (en) * | 2006-10-10 | 2008-04-24 | Topura Co Ltd | Tapping screw |
-
1980
- 1980-10-21 JP JP14742780A patent/JPS5920410B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0615800A1 (en) * | 1993-03-17 | 1994-09-21 | Former | Screw with ogive point and process for its production |
| FR2702689A1 (en) * | 1993-03-17 | 1994-09-23 | Former | Screw with ogival end and method of obtaining. |
| JP2008095773A (en) * | 2006-10-10 | 2008-04-24 | Topura Co Ltd | Tapping screw |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5920410B2 (en) | 1984-05-12 |
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