| 摘要 |
PROBLEM TO BE SOLVED: To devise a friction agitation joining method which prevents the seizure of metal to a bed as a result of the penetration of the front end of a joining pin through extruded profiles and chipping of the bed surface by the front end of the joining pin and the occurrence of an unjoined part by the non-arrival of the front end of the joining pin regardless of a change in the sheet-metal gage by the fabrication errors of the thicknesses of the profiles and a butt structure of the profiles. SOLUTION: The friction agitation joining method for butting the plate ends of the extruded profiles against each other and joining their butt surfaces is presumed, in which the plate end of the one extruded profile to be butted at the plate ends against each other is formed to an L shape in section and the plate end of the other extruded profile is superposed on the flat plate part of the L shape in section of the other extruded profile. When the front end face thereof is butted against the end face of the plate end of the L shape in section, the top surfaces of both plate ends are made flush with each other and the under surfaces of both profiles are made flush with each other. The butt surfaces are friction agitation joined by a friction agitation joining tool provided with the joining pin of the length equal to the thickness of the maximum tolerance of the plate ends of the extruded profiles. COPYRIGHT: (C)2004,JPO
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