JPS56165528A - Coining method - Google Patents

Coining method

Info

Publication number
JPS56165528A
JPS56165528A JP6885980A JP6885980A JPS56165528A JP S56165528 A JPS56165528 A JP S56165528A JP 6885980 A JP6885980 A JP 6885980A JP 6885980 A JP6885980 A JP 6885980A JP S56165528 A JPS56165528 A JP S56165528A
Authority
JP
Japan
Prior art keywords
work
work zone
zone
punch
coining
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
Application number
JP6885980A
Other languages
Japanese (ja)
Inventor
Tetsuo Nishimura
Tatsuya Adachi
Takayuki Sato
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6885980A priority Critical patent/JPS56165528A/en
Publication of JPS56165528A publication Critical patent/JPS56165528A/en
Pending legal-status Critical Current

Links

Landscapes

  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

PURPOSE: To improve the reduction of area, by forming an annular recess groove along the circumference of a work zone of a work, and by applying a coining work to the work.
CONSTITUTION: A work 5 is pressed by a cylindrical punch 11 having inner diameter d1 equal to the diameter d2 of a round work zone 6; hereby, an annular recess groove 12 is formed along the circumferential edge 7 of the work zone 6. A coining work is then applied to the work zone 6 by pressing with a punch 15 having outer diameter d4 equal to the inner diameter d1 of the punch 11. Hereupon, when the punch 15 presses the work zone 6, the work zone 6 surrounded by the groove 12 causes a plastic deformation and a part of the work zone 6 flows into the groove 12. As a result, the thickness t3 of the work zone 6 is reduced to a prescribed thickness displaying a deformation resistance smaller than that in case of a conventional method. A circumferential embankment 18 formed around the cavity 2 by the said coining work can be eliminated by an additional work.
COPYRIGHT: (C)1981,JPO&Japio
JP6885980A 1980-05-26 1980-05-26 Coining method Pending JPS56165528A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6885980A JPS56165528A (en) 1980-05-26 1980-05-26 Coining method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6885980A JPS56165528A (en) 1980-05-26 1980-05-26 Coining method

Publications (1)

Publication Number Publication Date
JPS56165528A true JPS56165528A (en) 1981-12-19

Family

ID=13385811

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6885980A Pending JPS56165528A (en) 1980-05-26 1980-05-26 Coining method

Country Status (1)

Country Link
JP (1) JPS56165528A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60141462A (en) * 1983-12-29 1985-07-26 Honda Motor Co Ltd Grinding of cylindrical member
WO1987004093A1 (en) * 1985-12-28 1987-07-16 Falcore Co., Ltd. Method of preparing metal base for memory disk
WO1987004094A1 (en) * 1985-12-28 1987-07-16 Falcore Co., Ltd Method of preparing base for memory disk
WO1987004095A1 (en) * 1985-12-28 1987-07-16 Falcore Co., Ltd. Method of preparing base for memory disk

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60141462A (en) * 1983-12-29 1985-07-26 Honda Motor Co Ltd Grinding of cylindrical member
JPH048174B2 (en) * 1983-12-29 1992-02-14 Honda Motor Co Ltd
WO1987004093A1 (en) * 1985-12-28 1987-07-16 Falcore Co., Ltd. Method of preparing metal base for memory disk
WO1987004094A1 (en) * 1985-12-28 1987-07-16 Falcore Co., Ltd Method of preparing base for memory disk
WO1987004095A1 (en) * 1985-12-28 1987-07-16 Falcore Co., Ltd. Method of preparing base for memory disk
GB2194187A (en) * 1985-12-28 1988-03-02 Falcore Co Ltd Method of preparing metal base for memory disk
GB2194188A (en) * 1985-12-28 1988-03-02 Falcore Co Ltd Method of preparing base for memory disk
GB2194189A (en) * 1985-12-28 1988-03-02 Falcore Co Ltd Method of preparing base for memory disk
GB2194189B (en) * 1985-12-28 1990-07-04 Falcore Co Ltd Method of manufacturing substrate for memory disc
GB2194187B (en) * 1985-12-28 1990-07-04 Falcore Co Ltd Method of manfacturing metal substrates for disk for memory storage media
GB2194188B (en) * 1985-12-28 1990-07-04 Falcore Co Ltd Method of manufacturing substrate for memory disk

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