Title:
HIGHLY EFFICIENT MANUFACTURING METHOD FOR TUBE WITH HIGH DIMENSIONAL PRECISION
Document Type and Number:
Japanese Patent JP2006061932
Kind Code:
A
Abstract:
To provide a method for manufacturing a tube having high dimensional precision, with high efficiency over the extensive range of requested tube size.
In this manufacturing method, ultrasonic waves of the frequency of 10-180 kHz are applied to a die in use in the direction substantially orthogonal to or substantially parallel to a drawing direction, or the direction orthogonal to an inner surface of an inclined portion of the die when manufacturing the tube having high dimensional precision by punching in which a plug is inserted in the tube, and the tube is pressed in the hole of the die.
Inventors:
KENMOCHI KAZUHITO
NAGAHAMA TAKUYA
SAKATA TAKASHI
OKITA KOICHI
NAGAHAMA TAKUYA
SAKATA TAKASHI
OKITA KOICHI
Application Number:
JP2004246072A
Publication Date:
March 09, 2006
Filing Date:
August 26, 2004
Export Citation:
Assignee:
JFE STEEL KK
International Classes:
B21C1/00; B21C1/26; B21C3/16
Attorney, Agent or Firm:
Eiichi Kobayashi
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