JPS5677028A - Dishing method - Google Patents

Dishing method

Info

Publication number
JPS5677028A
JPS5677028A JP15103980A JP15103980A JPS5677028A JP S5677028 A JPS5677028 A JP S5677028A JP 15103980 A JP15103980 A JP 15103980A JP 15103980 A JP15103980 A JP 15103980A JP S5677028 A JPS5677028 A JP S5677028A
Authority
JP
Japan
Prior art keywords
work
hole
dishing
recess
punch
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
JP15103980A
Other languages
Japanese (ja)
Other versions
JPS597529B2 (en
Inventor
Hiroshi Inagaki
Kanemitsu Kumeta
Sueji Abe
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.)
Nippon Light Metal Co Ltd
Original Assignee
Nippon Light Metal 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 Nippon Light Metal Co Ltd filed Critical Nippon Light Metal Co Ltd
Priority to JP15103980A priority Critical patent/JPS597529B2/en
Publication of JPS5677028A publication Critical patent/JPS5677028A/en
Publication of JPS597529B2 publication Critical patent/JPS597529B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Punching Or Piercing (AREA)

Abstract

PURPOSE: To absorb the metal flow at the dishing and prevent the occurrence of burrs on the back of the work by beforehand forming a predetermined recess to the back of the work to be formed with a dished part having a through-hole.
CONSTITUTION: A recess 16 of a size and shape of absorbing the metal flow at the working is formed on the back of the position of a work 4 where a through-hole 11 is to be pierced, prior to working with a punch 8. Next, a striplike projection 18 fitting to the inside circumferential surface 17 of the recess 16 of the work 4 is formed to a dishing die 2, to prevent the deviation of the work 4 with the dishing die 2 during working. The surface 3 of the die 2 encircled by the projection 18 is formed perpendicularly to a punch lead-in hole 1 and the work recess 16 is closed by the surface 3. Thence, the pierced part 7 of the punch 8 is advanced into the punch lead-in hole 1 at the working, whereby the through-hole 11 is pierced. The dishing part 6 is pressed to the inside surface of the through-hole 11, and the inside surface is formed to a taper surface 10. At this time, the metal flow is perfectly absorbed into the recess 16.
COPYRIGHT: (C)1981,JPO&Japio
JP15103980A 1980-10-28 1980-10-28 Counter drawing method Expired JPS597529B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15103980A JPS597529B2 (en) 1980-10-28 1980-10-28 Counter drawing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15103980A JPS597529B2 (en) 1980-10-28 1980-10-28 Counter drawing method

Publications (2)

Publication Number Publication Date
JPS5677028A true JPS5677028A (en) 1981-06-25
JPS597529B2 JPS597529B2 (en) 1984-02-18

Family

ID=15509957

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15103980A Expired JPS597529B2 (en) 1980-10-28 1980-10-28 Counter drawing method

Country Status (1)

Country Link
JP (1) JPS597529B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5414680A (en) * 1991-08-16 1995-05-09 Olympus Optical Co., Ltd. Apparatus with a compact configuration for supporting an optical pick up device
WO1996009904A1 (en) * 1994-09-29 1996-04-04 Nitto Kohki Co., Ltd. Boring method for forming tapering through hole in work by using press, and boring tool therefor
KR100233637B1 (en) * 1995-08-03 2000-03-02 다카다 모토유키 Method and tool for forming a tapered hole in a cylindrical work by punching extruding
JP2010264474A (en) * 2009-05-14 2010-11-25 Amada Co Ltd Method of forming countersink and dieing die, and punching die

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5414680A (en) * 1991-08-16 1995-05-09 Olympus Optical Co., Ltd. Apparatus with a compact configuration for supporting an optical pick up device
WO1996009904A1 (en) * 1994-09-29 1996-04-04 Nitto Kohki Co., Ltd. Boring method for forming tapering through hole in work by using press, and boring tool therefor
US5816093A (en) * 1994-09-29 1998-10-06 Nitto Kohki Co., Ltd. Method and tool for forming a tapered hole in a cylindrical work by punching extruding
KR100233637B1 (en) * 1995-08-03 2000-03-02 다카다 모토유키 Method and tool for forming a tapered hole in a cylindrical work by punching extruding
JP2010264474A (en) * 2009-05-14 2010-11-25 Amada Co Ltd Method of forming countersink and dieing die, and punching die

Also Published As

Publication number Publication date
JPS597529B2 (en) 1984-02-18

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