METHOD FOR WELDING MEMBER HAVING CLOSED HOLLOW CROSS SECTION

摘要

PROBLEM TO BE SOLVED: To omit a cleaning step of a surface to be joined before a welding process, so that efficiency improvement in operation and welding with no error can be achieved.

SOLUTION: A method for joining a first housing member 2 and a second housing member 3 by welding includes the steps of: preparing the first housing member having a first inside dimension I1; preparing the second housing member having a small cross section part including an outside dimension part A2 smaller than the inside dimension I1 of the first housing member and a large cross section part forming a press bonding part between the first housing member and the second housing member; arranging the second housing member inside the first housing member to form an annular gap 6 between an inner wall of the first housing member and an outer wall of the second housing member; and performing welding of the first housing member and the second housing member in an area of the gap between the first housing member and the second housing member.

COPYRIGHT: (C)2012,JPO&INPIT