JPS56165528A - Coining method - Google Patents
Coining methodInfo
- Publication number
- JPS56165528A JPS56165528A JP6885980A JP6885980A JPS56165528A JP S56165528 A JPS56165528 A JP S56165528A JP 6885980 A JP6885980 A JP 6885980A JP 6885980 A JP6885980 A JP 6885980A JP S56165528 A JPS56165528 A JP S56165528A
- Authority
- JP
- Japan
- Prior art keywords
- work
- work zone
- zone
- punch
- coining
- 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
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
PURPOSE: To improve the reduction of area, by forming an annular recess groove along the circumference of a work zone of a work, and by applying a coining work to the work.
CONSTITUTION: A work 5 is pressed by a cylindrical punch 11 having inner diameter d1 equal to the diameter d2 of a round work zone 6; hereby, an annular recess groove 12 is formed along the circumferential edge 7 of the work zone 6. A coining work is then applied to the work zone 6 by pressing with a punch 15 having outer diameter d4 equal to the inner diameter d1 of the punch 11. Hereupon, when the punch 15 presses the work zone 6, the work zone 6 surrounded by the groove 12 causes a plastic deformation and a part of the work zone 6 flows into the groove 12. As a result, the thickness t3 of the work zone 6 is reduced to a prescribed thickness displaying a deformation resistance smaller than that in case of a conventional method. A circumferential embankment 18 formed around the cavity 2 by the said coining work can be eliminated by an additional work.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6885980A JPS56165528A (en) | 1980-05-26 | 1980-05-26 | Coining method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6885980A JPS56165528A (en) | 1980-05-26 | 1980-05-26 | Coining method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56165528A true JPS56165528A (en) | 1981-12-19 |
Family
ID=13385811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6885980A Pending JPS56165528A (en) | 1980-05-26 | 1980-05-26 | Coining method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56165528A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60141462A (en) * | 1983-12-29 | 1985-07-26 | Honda Motor Co Ltd | Grinding of cylindrical member |
WO1987004093A1 (en) * | 1985-12-28 | 1987-07-16 | Falcore Co., Ltd. | Method of preparing metal base for memory disk |
WO1987004094A1 (en) * | 1985-12-28 | 1987-07-16 | Falcore Co., Ltd | Method of preparing base for memory disk |
WO1987004095A1 (en) * | 1985-12-28 | 1987-07-16 | Falcore Co., Ltd. | Method of preparing base for memory disk |
-
1980
- 1980-05-26 JP JP6885980A patent/JPS56165528A/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60141462A (en) * | 1983-12-29 | 1985-07-26 | Honda Motor Co Ltd | Grinding of cylindrical member |
JPH048174B2 (en) * | 1983-12-29 | 1992-02-14 | Honda Motor Co Ltd | |
WO1987004093A1 (en) * | 1985-12-28 | 1987-07-16 | Falcore Co., Ltd. | Method of preparing metal base for memory disk |
WO1987004094A1 (en) * | 1985-12-28 | 1987-07-16 | Falcore Co., Ltd | Method of preparing base for memory disk |
WO1987004095A1 (en) * | 1985-12-28 | 1987-07-16 | Falcore Co., Ltd. | Method of preparing base for memory disk |
GB2194187A (en) * | 1985-12-28 | 1988-03-02 | Falcore Co Ltd | Method of preparing metal base for memory disk |
GB2194188A (en) * | 1985-12-28 | 1988-03-02 | Falcore Co Ltd | Method of preparing base for memory disk |
GB2194189A (en) * | 1985-12-28 | 1988-03-02 | Falcore Co Ltd | Method of preparing base for memory disk |
GB2194189B (en) * | 1985-12-28 | 1990-07-04 | Falcore Co Ltd | Method of manufacturing substrate for memory disc |
GB2194187B (en) * | 1985-12-28 | 1990-07-04 | Falcore Co Ltd | Method of manfacturing metal substrates for disk for memory storage media |
GB2194188B (en) * | 1985-12-28 | 1990-07-04 | Falcore Co Ltd | Method of manufacturing substrate for memory disk |
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