JPS5794430A - Die cushion of cushion press - Google Patents

Die cushion of cushion press

Info

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
Application number
JP55170548A
Other languages
Japanese (ja)
Other versions
JPS6347524B2 (en
Inventor
Fumiki Yokota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP55170548A priority Critical patent/JPS5794430A/en
Publication of JPS5794430A publication Critical patent/JPS5794430A/en
Publication of JPS6347524B2 publication Critical patent/JPS6347524B2/ja
Granted legal-status Critical Current

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
JP55170548A 1980-12-03 1980-12-03 Die cushion of cushion press Granted JPS5794430A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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