JPS5522439A - Blanking method for hole in square pipe - Google Patents

Blanking method for hole in square pipe

Info

Publication number
JPS5522439A
JPS5522439A JP9471578A JP9471578A JPS5522439A JP S5522439 A JPS5522439 A JP S5522439A JP 9471578 A JP9471578 A JP 9471578A JP 9471578 A JP9471578 A JP 9471578A JP S5522439 A JPS5522439 A JP S5522439A
Authority
JP
Japan
Prior art keywords
square pipe
blade
plate
fixed
press
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
JP9471578A
Other languages
Japanese (ja)
Inventor
Hajime Higuchi
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.)
KYOEI KIKO KK
KYOEI KIKOU KK
Original Assignee
KYOEI KIKO KK
KYOEI KIKOU 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 KYOEI KIKO KK, KYOEI KIKOU KK filed Critical KYOEI KIKO KK
Priority to JP9471578A priority Critical patent/JPS5522439A/en
Publication of JPS5522439A publication Critical patent/JPS5522439A/en
Pending legal-status Critical Current

Links

Landscapes

  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Punching Or Piercing (AREA)

Abstract

PURPOSE: To blank various holes on one side plate without using female dies and considerably improve workability by inserting a blade made of thin steel plate given with a shear angle on the bottom face into a square pipe from its one side.
CONSTITUTION: A flat plate form blade 1 given with a shear angle α at the bottom face of a thin steel plate of a square shape of a suitable size is prepared. This blade 1 is fixed by means of a keep plate 4 and set rivets 5 to the flat square form block 3 fixed to the die plate 2 of a press to form a blanking die. Next, the square pipe 6 to be blanked is fixed on the press table and the press is lowered, whereby the blade 1 is contacted and lowered to the square pipe 6, thus a desired hole 7 may be blanked in one process. Since no female dies are used, there is no need for removing the female dies after blanking, thus workability may be considerably improved.
COPYRIGHT: (C)1980,JPO&Japio
JP9471578A 1978-07-31 1978-07-31 Blanking method for hole in square pipe Pending JPS5522439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9471578A JPS5522439A (en) 1978-07-31 1978-07-31 Blanking method for hole in square pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9471578A JPS5522439A (en) 1978-07-31 1978-07-31 Blanking method for hole in square pipe

Publications (1)

Publication Number Publication Date
JPS5522439A true JPS5522439A (en) 1980-02-18

Family

ID=14117826

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9471578A Pending JPS5522439A (en) 1978-07-31 1978-07-31 Blanking method for hole in square pipe

Country Status (1)

Country Link
JP (1) JPS5522439A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5189A (en) * 1974-06-20 1976-01-05 Sakuhei Fujita Magaripaipuniokeru anaakehoho
JPS5246385B2 (en) * 1972-04-15 1977-11-24

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5246385B2 (en) * 1972-04-15 1977-11-24
JPS5189A (en) * 1974-06-20 1976-01-05 Sakuhei Fujita Magaripaipuniokeru anaakehoho

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