JPS6483910A - Self-drilling screw and manufacture thereof - Google Patents
Self-drilling screw and manufacture thereofInfo
- Publication number
- JPS6483910A JPS6483910A JP24053887A JP24053887A JPS6483910A JP S6483910 A JPS6483910 A JP S6483910A JP 24053887 A JP24053887 A JP 24053887A JP 24053887 A JP24053887 A JP 24053887A JP S6483910 A JPS6483910 A JP S6483910A
- Authority
- JP
- Japan
- Prior art keywords
- cutting edges
- blades
- dice
- edges
- gradient
- 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
Landscapes
- Forging (AREA)
Abstract
PURPOSE: To improve cutting ability against a metal plate or the like for reducing to produce useless burrs to stabilize a diameter of a lower bore by forming vertical cutting edges and gradient cutting edges on cutting surfaces of cutting grooves and forming the gradient cutting edges by striking a pair of blades of dice against together. CONSTITUTION: Gradient cutting edges 7, 11 comprise linear blades formed by striking a pair of blades dice against together, and vertical cutting edges 8, 12 comprise rising blades formed by sliding one blade of dice into another blade of dice. Thereby linear gradient cutting edges 7, 11 are similar to a tip shape of a twist drill to improve cutting ability against a metal plate or the like. The vertical cutting edges 8, 12, which are slid into the blades of dice, have shapes of rising acute blades. And the vertical cutting edges can remove extra materials, prevent producing useless burrs in the area from shoulder sections 21, 22 at screw guiding edges to the vertical cutting edges 8, 12, and stabilize a diameter of the guiding edges and a diameter of a lower bore drilling therewith.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24053887A JPS6483910A (en) | 1987-09-24 | 1987-09-24 | Self-drilling screw and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24053887A JPS6483910A (en) | 1987-09-24 | 1987-09-24 | Self-drilling screw and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6483910A true JPS6483910A (en) | 1989-03-29 |
| JPH0562647B2 JPH0562647B2 (en) | 1993-09-08 |
Family
ID=17061023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24053887A Granted JPS6483910A (en) | 1987-09-24 | 1987-09-24 | Self-drilling screw and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6483910A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100879153B1 (en) * | 2008-04-25 | 2009-01-19 | 주식회사 명화금속 | Self drilling screw |
| KR20170118374A (en) * | 2016-04-15 | 2017-10-25 | 한만진 | Self tapping screw |
-
1987
- 1987-09-24 JP JP24053887A patent/JPS6483910A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100879153B1 (en) * | 2008-04-25 | 2009-01-19 | 주식회사 명화금속 | Self drilling screw |
| KR20170118374A (en) * | 2016-04-15 | 2017-10-25 | 한만진 | Self tapping screw |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0562647B2 (en) | 1993-09-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313532 |
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| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| R371 | Transfer withdrawn |
Free format text: JAPANESE INTERMEDIATE CODE: R371 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |