JPS5775241A - Press-forming method of parts having blind hole - Google Patents
Press-forming method of parts having blind holeInfo
- Publication number
- JPS5775241A JPS5775241A JP15169180A JP15169180A JPS5775241A JP S5775241 A JPS5775241 A JP S5775241A JP 15169180 A JP15169180 A JP 15169180A JP 15169180 A JP15169180 A JP 15169180A JP S5775241 A JPS5775241 A JP S5775241A
- Authority
- JP
- Japan
- Prior art keywords
- blind hole
- punch
- formed product
- die
- hole
- 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 prevent occurrence of flaws on the finished surface and improve commercial value by putting a preliminarily formed product having a blind hole in a die, finish-forming with a punch having larger diameter than the blind hole and retreating the punch and thereby pulling out the formed product as it is attached to the punch.
CONSTITUTION: A preliminarily formed product 9 having a raised part continuously from a straight stem and provided with a blind hole 10 at the center is put in a die 34 that has a narrowed inner part continuously from a straight part 55 and provided with an air escape hole 7 at the bottom. A punch that has slightly larger diameter than that of the blind hole 10 of the preliminarily formed product 9 is driven into the blind hole 10 so that preliminarily formed product 9 is swelled out by the difference of diameter of the punch 44 and blind hole 10 to fit the die hole 54. The air is expelled from the air escape hole 7. When the punch 44 is retreated, the finished product 9 having a blind hole comes out from the die 34 being attached to the tip of the punch 44 and shaked down to a stripper 8 without forming flaws on the finished surface as in the case of a knockout pin.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15169180A JPS5932227B2 (en) | 1980-10-28 | 1980-10-28 | Heading method for parts with blind holes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15169180A JPS5932227B2 (en) | 1980-10-28 | 1980-10-28 | Heading method for parts with blind holes |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5775241A true JPS5775241A (en) | 1982-05-11 |
JPS5932227B2 JPS5932227B2 (en) | 1984-08-07 |
Family
ID=15524149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15169180A Expired JPS5932227B2 (en) | 1980-10-28 | 1980-10-28 | Heading method for parts with blind holes |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5932227B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5170655A (en) * | 1991-09-18 | 1992-12-15 | San Shine Hardware Works Co., Ltd. | Method for forming hollow articles |
US6397652B1 (en) | 2000-03-22 | 2002-06-04 | The Sollami Company | Tool body and method of manufacture |
-
1980
- 1980-10-28 JP JP15169180A patent/JPS5932227B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5170655A (en) * | 1991-09-18 | 1992-12-15 | San Shine Hardware Works Co., Ltd. | Method for forming hollow articles |
US6397652B1 (en) | 2000-03-22 | 2002-06-04 | The Sollami Company | Tool body and method of manufacture |
Also Published As
Publication number | Publication date |
---|---|
JPS5932227B2 (en) | 1984-08-07 |
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