Title:
BRAZED PIPE AND PRODUCTION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2007/114366
Kind Code:
A1
Abstract:
A method of producing a brazed pipe including steps A-D. In step A, a first inclined surface
(21) inclined downwardly from the above toward the right end is formed on the top
surface of the right-side edge of a blank plate (20) having brazing filler metal
layers on the opposite surfaces, and a first flat surface (22) is formed between
the first inclined surface (21) and the bottom surface. In step B, a second inclined
surface (24) inclined upwardly from the below toward the left end is formed on
the bottom surface of the left-side edge of a blank plate (20), and a second flat
surface (25) is formed between the second inclined surface (24) and the bottom surface.
In step C, the blank plate (20) is formed in a tubular shape, and the both inclined
surfaces (21, 24) are brought into surface-contact and the both flat surfaces
(22, 25) are brought into contact to obtain a brazed pipe-use tubular body (34).
In step D, the both inclined surfaces (21, 24) at the opposite-side edges of the
blank plate (20) and the both flat surfaces (22, 25) are respectively brazed to
each other by using the brazing filler metal layers of the blank plate (20). The
above method can provide a brazed pipe free from step difference on the outer surface.
Inventors:
NUMASAWA MAKOTO (JP)
NOBUSUE MITSURU (JP)
SANADA HIROKAZU (JP)
NOBUSUE MITSURU (JP)
SANADA HIROKAZU (JP)
Application Number:
PCT/JP2007/057194
Publication Date:
October 11, 2007
Filing Date:
March 30, 2007
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
NUMASAWA MAKOTO (JP)
NOBUSUE MITSURU (JP)
SANADA HIROKAZU (JP)
NUMASAWA MAKOTO (JP)
NOBUSUE MITSURU (JP)
SANADA HIROKAZU (JP)
International Classes:
B23K1/16; F28F9/02; B23K101/14
Foreign References:
JPS63170073U | 1988-11-04 | |||
JPH0248268U | 1990-04-03 | |||
JP2002151612A | 2002-05-24 |
Attorney, Agent or Firm:
HIBI, Norihiko et al. (3rd Floor Inaba Building, 13-18, Nishishinsaibashi 1-chome, Chuo-ku, Osaka-sh, Osaka 86, JP)
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