Title:
SHEARING METHOD FOR COATED STEEL PLATE
Document Type and Number:
Japanese Patent JP2011194549
Kind Code:
A
Abstract:
To provide a shearing method for a coated steel plate, capable of restraining generation of enamel hair even in the case that the coated steel plate has a relatively thick coat in a plate portion to be processed when applying shearing to the coated steel plate.
When shearing is performed by pressing a shearing punch into coated steel plate placed on a die, a spare punch having a corner R on a top end is pressed against to decrease a coating thickness of a shearing portion, and then the shearing punch is pressed into. When the inside of a material is sheared, the spare punch and the shearing punch capable of forming a recessed portion on a flat surface of the top end are used.
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Inventors:
FUNAMOTO KENTA
NAKAMURA TAKAFUMI
MORIKAWA SHIGERU
NAKAMURA TAKAFUMI
MORIKAWA SHIGERU
Application Number:
JP2010067149A
Publication Date:
October 06, 2011
Filing Date:
March 24, 2010
Export Citation:
Assignee:
NISSHIN STEEL CO LTD
International Classes:
B23D15/06; B05D3/12; B21D28/14; B23D35/00
Domestic Patent References:
| JP2005088092A | 2005-04-07 | |||
| JPH09277113A | 1997-10-28 | |||
| JPH09300295A | 1997-11-25 | |||
| JPS605351B2 | 1985-02-09 | |||
| JP2002224770A | 2002-08-13 | |||
| JP2005296998A | 2005-10-27 | |||
| JPH03211266A | 1991-09-17 | |||
| JP3129885U | 2007-03-08 | |||
| JPS4747953B |
Attorney, Agent or Firm:
Okada Manri