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Title:
CHAMFERING METHOD, PUNCH DIE, AND DIE
Document Type and Number:
Japanese Patent JP2007111753
Kind Code:
A
Abstract:

To provide a chamfering method for easily chamfering a product even when a work is a thick plate, and a die.

In the chamfering method for chamfering the end face of a plate-like product, space parts 39A, 39B are provided in parallel with the contour part of a part 37A to be the product of a plate-like work W. By driving the tip part of the punch with the tip party formed in an acute angle in the contour part of the part to be the product, a run-off part 41 for suppressing any transverse movement of the punch on the side of the space parts 39A, 39B, and the part to be the product is chamfered. The die has a chamfering blade part 27 of the predetermined length having a nearly triangular cross section which has a tip part formed in an acute angle and inclined surfaces 25A, 25B on both sides thereof on the lower end of a punch body 9 which is freely vertically movable in a punch guide 7. The die also has a plate-like transverse movement regulating member 29 which is protruded below the chamfering blade part 27 at the position close to the chamfering blade part 27.


Inventors:
OKAMOTO TAKUYA
SUGIZAKI FUMITAKA
Application Number:
JP2005307023A
Publication Date:
May 10, 2007
Filing Date:
October 21, 2005
Export Citation:
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Assignee:
AMADA CO LTD
International Classes:
B21D19/00
Domestic Patent References:
JPH07185704A1995-07-25
JPH07185704A1995-07-25
JPH0542330A1993-02-23
JPH01153814U1989-10-23
JPH03204124A1991-09-05
Attorney, Agent or Firm:
Hidekazu Miyoshi
Iwa Saki Kokuni
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu