Title:
PUNCH DIE, AND BURRING METHOD USING THE PUNCH DIE
Document Type and Number:
Japanese Patent JP2001219229
Kind Code:
A
Abstract:
To improve the burring accuracy by machining a V-shaped groove in an outer circumference of a prepared hole in a work.
A punch die P to punch the work W in cooperation with a die D is provided with a V-shaped groove machining blade tip portion 35 at the position corresponding to the outer circumference of the prepared hole A of the work W placed on the die D. The prepared hole A in the work W is punched by using the punch die P, the V-shaped groove 41 is machined in the outer circumference of the prepared hole A, the prepared hole A is protruded to the V-shaped groove 41 side, and a flange F1 is formed to implement the burring.
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Inventors:
SEKI MASAYUKI
Application Number:
JP2000033451A
Publication Date:
August 14, 2001
Filing Date:
February 10, 2000
Export Citation:
Assignee:
AMADA METRECS CO
International Classes:
B21D19/08; B21D28/10; B21D28/34; (IPC1-7): B21D28/10; B21D19/08; B21D28/34
Attorney, Agent or Firm:
Akira Saito
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