JPS6411038A - Production of precise metal disk - Google Patents

Production of precise metal disk

Info

Publication number
JPS6411038A
JPS6411038A JP16696887A JP16696887A JPS6411038A JP S6411038 A JPS6411038 A JP S6411038A JP 16696887 A JP16696887 A JP 16696887A JP 16696887 A JP16696887 A JP 16696887A JP S6411038 A JPS6411038 A JP S6411038A
Authority
JP
Japan
Prior art keywords
reducing
mandrel
expanding
blank
diameter
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
JP16696887A
Other languages
Japanese (ja)
Inventor
Atsushi Yamazaki
Akira Saito
Shoichi Sakota
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.)
Fuarukoa Kk
Original Assignee
Fuarukoa Kk
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 Fuarukoa Kk filed Critical Fuarukoa Kk
Priority to JP16696887A priority Critical patent/JPS6411038A/en
Publication of JPS6411038A publication Critical patent/JPS6411038A/en
Pending legal-status Critical Current

Links

Landscapes

  • Forging (AREA)
  • Manufacturing Optical Record Carriers (AREA)

Abstract

PURPOSE:To prevent the defect generation of a product by elastically reducing the diameter of a die ring, elastically expanding the diameter of a mandrel, if necessary, as well and releasing the reducing and expanding states after coining. CONSTITUTION:The die ring 4 regulating the spreading of a blank 3 to the outer peripheral side is provided and a reducing ring 6 is arranged as well. In the case of the blank 3 having a center hole an expanding rod 7 is set up for a mandrel 5. The blank 3 is mounted on a lower die 1, the reducing ring 6 and mandrel 5 are descended and the diameter of the die ring 4 is reduced. The mandrel 5 is then expanded by pushing the expanding rod 7 into the tapered hole of the mandrel 5 and coining is executed in that state. In succession the diameter reducing and expanding states are released to obtain a product disk. Due to the blank 3 being worked in reducing and extending states the defect generation of a roll over, seizure, etc., is prevented.
JP16696887A 1987-07-06 1987-07-06 Production of precise metal disk Pending JPS6411038A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16696887A JPS6411038A (en) 1987-07-06 1987-07-06 Production of precise metal disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16696887A JPS6411038A (en) 1987-07-06 1987-07-06 Production of precise metal disk

Publications (1)

Publication Number Publication Date
JPS6411038A true JPS6411038A (en) 1989-01-13

Family

ID=15840958

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16696887A Pending JPS6411038A (en) 1987-07-06 1987-07-06 Production of precise metal disk

Country Status (1)

Country Link
JP (1) JPS6411038A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002077985A1 (en) * 2001-03-21 2002-10-03 Steag Hamatech Ag Device for joining substrates

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002077985A1 (en) * 2001-03-21 2002-10-03 Steag Hamatech Ag Device for joining substrates
US7182116B2 (en) * 2001-03-21 2007-02-27 Steag Hamatech Ag Device for joining substrates

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