JPS5666325A - Sheet metal forming method - Google Patents

Sheet metal forming method

Info

Publication number
JPS5666325A
JPS5666325A JP14364279A JP14364279A JPS5666325A JP S5666325 A JPS5666325 A JP S5666325A JP 14364279 A JP14364279 A JP 14364279A JP 14364279 A JP14364279 A JP 14364279A JP S5666325 A JPS5666325 A JP S5666325A
Authority
JP
Japan
Prior art keywords
blank
strip
slit
finished product
straight parts
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
JP14364279A
Other languages
Japanese (ja)
Inventor
Kenichi Maeda
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 Aluminium Co Ltd
Original Assignee
Nippon Aluminium 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 Aluminium Co Ltd filed Critical Nippon Aluminium Co Ltd
Priority to JP14364279A priority Critical patent/JPS5666325A/en
Publication of JPS5666325A publication Critical patent/JPS5666325A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To contrive the reduction of the material cost and the improvement of the dimensional accuracy of the product, by forming a part of circumference of the blank with the side edge of the strip and the slit, and by trimming the half- finished product to finish it into the round shape.
CONSTITUTION: The strip 10 is intermittently fed to the right by a pitch P1 and is blanked by the die; hereby, a roughly round blank 12 in radius R1 is obtained. Hereupon, the upstream side slit 11 and the downstream side scrap part are worked at the same time. This blank 12 includes two straight parts 17 formed by the side edges 16 of the strip 10 and two straight parts 18 formed by the slit 11a formed by the former blanking work, at four positions in the circumference of the blank 12. Thus formed blank 12 is subjected to the press forming work and the half-finished product is obtained; next, this half-finished product is finished by the trimming work into the round shape Q in radius R with the outer circumference touching internally the straight parts 17, 18.
COPYRIGHT: (C)1981,JPO&Japio
JP14364279A 1979-11-05 1979-11-05 Sheet metal forming method Pending JPS5666325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14364279A JPS5666325A (en) 1979-11-05 1979-11-05 Sheet metal forming method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14364279A JPS5666325A (en) 1979-11-05 1979-11-05 Sheet metal forming method

Publications (1)

Publication Number Publication Date
JPS5666325A true JPS5666325A (en) 1981-06-04

Family

ID=15343520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14364279A Pending JPS5666325A (en) 1979-11-05 1979-11-05 Sheet metal forming method

Country Status (1)

Country Link
JP (1) JPS5666325A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61144225A (en) * 1984-12-17 1986-07-01 Honda Motor Co Ltd Method for obtaining blank for product obtained by inside-out drawing cylinder
WO1998051426A1 (en) * 1997-05-09 1998-11-19 Toyo Kohan Co., Ltd. Method for blanking blanks for cupping, blank, and cylindrical can formed from that blank

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61144225A (en) * 1984-12-17 1986-07-01 Honda Motor Co Ltd Method for obtaining blank for product obtained by inside-out drawing cylinder
WO1998051426A1 (en) * 1997-05-09 1998-11-19 Toyo Kohan Co., Ltd. Method for blanking blanks for cupping, blank, and cylindrical can formed from that blank

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