JPS6462226A - Method for forming gimlet form in trimming die - Google Patents
Method for forming gimlet form in trimming dieInfo
- Publication number
- JPS6462226A JPS6462226A JP21676687A JP21676687A JPS6462226A JP S6462226 A JPS6462226 A JP S6462226A JP 21676687 A JP21676687 A JP 21676687A JP 21676687 A JP21676687 A JP 21676687A JP S6462226 A JPS6462226 A JP S6462226A
- Authority
- JP
- Japan
- Prior art keywords
- die
- gimlet
- trimming
- forming
- clearance
- 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
- Punching Or Piercing (AREA)
Abstract
PURPOSE:To reduce the number of stages forming a gimlet-shaped working stock from a plate stock by providing the clearance of the female die of a trimming die for the male die in non-parallel. CONSTITUTION:A square gimlet forming trimming die is composed of the male die 6 consisting of the upper holder 5 holding the stripper 3, etc., pressing via an elastic body 4, the punch 2 pressing a plate stock 1 and the plate stock 1, and the female die 9 consisting of the lower holder 8 supporting the die 7 forming a slope surface. The clearance of the punch 2 of this male die 6 and the die 7 of the female die 9 is formed in non-parallel. This non-parallel can be formed by varying the clearance in linear shape or circular arcuated shape. A slope is thus formed by positively generating a roll over due to punching and the square gimlet 10 capable of obtg. the final shape without executing coining is formed. Also said square gimlet 10 is preferably formed in the length longer than and less than two times the side along the trimming at its side orthogonal with the trimming of the bottom face.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21676687A JPS6462226A (en) | 1987-08-31 | 1987-08-31 | Method for forming gimlet form in trimming die |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21676687A JPS6462226A (en) | 1987-08-31 | 1987-08-31 | Method for forming gimlet form in trimming die |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6462226A true JPS6462226A (en) | 1989-03-08 |
Family
ID=16693571
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21676687A Pending JPS6462226A (en) | 1987-08-31 | 1987-08-31 | Method for forming gimlet form in trimming die |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6462226A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009127654A (en) * | 2007-11-20 | 2009-06-11 | Jatco Ltd | Torque converter and press device |
US20130114984A1 (en) * | 2011-11-09 | 2013-05-09 | Canon Finetech Inc. | Sheet punching device and image forming apparatus |
-
1987
- 1987-08-31 JP JP21676687A patent/JPS6462226A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009127654A (en) * | 2007-11-20 | 2009-06-11 | Jatco Ltd | Torque converter and press device |
US20130114984A1 (en) * | 2011-11-09 | 2013-05-09 | Canon Finetech Inc. | Sheet punching device and image forming apparatus |
US10131070B2 (en) * | 2011-11-09 | 2018-11-20 | Canon Finetech Nisca Inc. | Sheet punching device and image forming apparatus |
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