Title:
METAL TUBE HAVING A PLURALITY OF FLOW PASSAGES AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JPH11254032
Kind Code:
A
Abstract:
To obtain a metal tube whose inside is partitioned with partition walls extending in the axial direction of a tube.
In this metal tube, the inside of the tube is partitioned into plural flow passages D1, D2 with partition walls t2, t3 extending in the axial direction of the tube. The partition walls t2, t3 are formed by closing an extending part t1 and welding t5 it. When the extending part t1 is welded with a facing internal surface, the flow passages D1, D2 are formed into mutually closed flow passages. The flow passages D1, D2 are also formed by extending the wall t0 of the tube from the opposite direction, forming plural extending parts t1 toward the center of the tube and mutually welding the tip of the extending part t1.
Inventors:
NAKAHARA NORIYUKI
NAKAKO TAKEFUMI
INOUE SHOJI
NAKAKO TAKEFUMI
INOUE SHOJI
Application Number:
JP5690398A
Publication Date:
September 21, 1999
Filing Date:
March 09, 1998
Export Citation:
Assignee:
NISSHIN STEEL CO LTD
International Classes:
B21C37/15; B21D17/02; B21D17/04; F28F1/00; (IPC1-7): B21C37/15; B21D17/02; B21D17/04; F28F1/00
Attorney, Agent or Firm:
Wataru Ogura