JPS56165526A - Coining method - Google Patents
Coining methodInfo
- Publication number
- JPS56165526A JPS56165526A JP6885780A JP6885780A JPS56165526A JP S56165526 A JPS56165526 A JP S56165526A JP 6885780 A JP6885780 A JP 6885780A JP 6885780 A JP6885780 A JP 6885780A JP S56165526 A JPS56165526 A JP S56165526A
- Authority
- JP
- Japan
- Prior art keywords
- order
- deformation resistance
- work
- working point
- heating
- 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 carry out a coining work with good mass-productivity and improved reduction of area, by heating a working point of a sheet material to be worked with an infrared radiation, etc., in order to lower the plastic-deformation resistance, and then, by pressing with a punch in order to form a cavity.
CONSTITUTION: Infrared rays 18 generated frofm a light source 14 is irradiated from both sides upon the upper surface of a material to be worked 1a laid on a lower die 11 in order to heat a working point 19 and its neighborhood. After heating for a prescribed period of time, a punch 13 is put down in order to press the working point 19 of the work 1a similarly to authorized instances; by thus applying a coining work, a semifinished product 1b having a cavity 2 is prepared. The said heating temperature is set to 200W300°C; at these temperatures, the deformation resistance of a 18W8 stanless steel (SUS304) is about 30% smaller than that at ordinary temperatures. Since the deformation resistance scarecely changes with the temperature change within the said temperature range, the irregularity of thickness (t1-Δt1) of the semifinished product 1b after the coining work is finished is very small.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6885780A JPS56165526A (en) | 1980-05-26 | 1980-05-26 | Coining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6885780A JPS56165526A (en) | 1980-05-26 | 1980-05-26 | Coining method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56165526A true JPS56165526A (en) | 1981-12-19 |
Family
ID=13385754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6885780A Pending JPS56165526A (en) | 1980-05-26 | 1980-05-26 | Coining method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56165526A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01228614A (en) * | 1988-03-09 | 1989-09-12 | Seiko:Kk | Method for working metallic member |
| JPH0425053A (en) * | 1990-05-16 | 1992-01-28 | Mitsui High Tec Inc | Manufacture of lead frame |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4895976A (en) * | 1972-03-22 | 1973-12-08 | ||
| JPS5044568A (en) * | 1973-08-27 | 1975-04-22 |
-
1980
- 1980-05-26 JP JP6885780A patent/JPS56165526A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4895976A (en) * | 1972-03-22 | 1973-12-08 | ||
| JPS5044568A (en) * | 1973-08-27 | 1975-04-22 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01228614A (en) * | 1988-03-09 | 1989-09-12 | Seiko:Kk | Method for working metallic member |
| JPH0425053A (en) * | 1990-05-16 | 1992-01-28 | Mitsui High Tec Inc | Manufacture of lead frame |
| JPH0821660B2 (en) * | 1990-05-16 | 1996-03-04 | 株式会社三井ハイテック | Lead frame manufacturing method |
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