Title:
GROOVED TUBE MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2005161357
Kind Code:
A
Abstract:
To provide a grooved tube manufacturing method capable of manufacturing a grooved tube at high efficiency.
A plug (i.e., a grooved plug) 2 with unevenness formed on a surface is inserted in a tube, and the tube is fed to a die 3 to perform the punching thereof. Alternatively, the plug is inserted in the tube, and the tube is fed to a die (i.e., a grooved die) with unevenness formed on an inner surface of a hole to perform the punching.
Inventors:
KENMOCHI KAZUHITO
NAGAHAMA TAKUYA
SAKATA TAKASHI
NAGAHAMA TAKUYA
SAKATA TAKASHI
Application Number:
JP2003402887A
Publication Date:
June 23, 2005
Filing Date:
December 02, 2003
Export Citation:
Assignee:
JFE STEEL KK
International Classes:
F28F1/40; B21C1/22; B21C1/26; B21C3/02; B21C3/16; (IPC1-7): B21C1/22; B21C1/26; B21C3/02; B21C3/16; F28F1/40
Attorney, Agent or Firm:
Eiichi Kobayashi
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