JPS5794430A - Die cushion of cushion press - Google Patents
Die cushion of cushion pressInfo
- Publication number
- JPS5794430A JPS5794430A JP55170548A JP17054880A JPS5794430A JP S5794430 A JPS5794430 A JP S5794430A JP 55170548 A JP55170548 A JP 55170548A JP 17054880 A JP17054880 A JP 17054880A JP S5794430 A JPS5794430 A JP S5794430A
- Authority
- JP
- Japan
- Prior art keywords
- cushion
- pressure
- pressure room
- operating rod
- die
- 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
- Presses And Accessory Devices Thereof (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
PURPOSE: To improve the yield of a material by suppressing the intrusion of the circumferential part of the material into a forming die by making the 1st pressure room of a two-stage type die cushion independent of the 2nd pressure room and by staggering cushion operation in the 2nd pressure room.
CONSTITUTION: When pressure force operates on a die cushion 10 which has the 1st pressure room 13 and 2nd pressure room 17, the stepped part 15a of an operating rod 15 is separated from a free piston 23, so the depression of the 1st cushion ram permits the operating rod 15 to slide toward the free piston 23. The refore, reaction force which corresponds to the internal pressure of the 1st pressure room 13 operates on a blank holder. When drawing formation advances and the stepped part 15a of the operating rod 15 strikes the free piston 23, the internal pressure of the 2nd pressure room 17 is added to the wrinkling pressure force of the circumferential part of a material. As a result, the intrusion of the circumferential part into a forming die is nearly stopped.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55170548A JPS5794430A (en) | 1980-12-03 | 1980-12-03 | Die cushion of cushion press |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55170548A JPS5794430A (en) | 1980-12-03 | 1980-12-03 | Die cushion of cushion press |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5794430A true JPS5794430A (en) | 1982-06-11 |
JPS6347524B2 JPS6347524B2 (en) | 1988-09-22 |
Family
ID=15906915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55170548A Granted JPS5794430A (en) | 1980-12-03 | 1980-12-03 | Die cushion of cushion press |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5794430A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59129425U (en) * | 1983-02-18 | 1984-08-31 | 佐藤鉄工株式会社 | Press dictation device |
JPS62137623U (en) * | 1986-02-24 | 1987-08-29 |
-
1980
- 1980-12-03 JP JP55170548A patent/JPS5794430A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59129425U (en) * | 1983-02-18 | 1984-08-31 | 佐藤鉄工株式会社 | Press dictation device |
JPS62137623U (en) * | 1986-02-24 | 1987-08-29 |
Also Published As
Publication number | Publication date |
---|---|
JPS6347524B2 (en) | 1988-09-22 |
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