| 摘要 |
PROBLEM TO BE SOLVED: To execute friction agitation welding while preventing cavities from occurring at a welding portion of a material to be welded, when continuity of agitation is interrupted. SOLUTION: While pressing stressσ1,σ2,σ3 having 0.2 times or more bearing forces are applied simultaneously in three directions orthogonal to the material 1 to be welded, an agitation tool 4 is moved along the welding surface 6 as being rotated to execute the friction agitation welding. The occurrence of cavities is suppressed by the pressing stressσ1,σ2,σ3, allowing the friction agitation welding to be executed preventing the generation of the cavities. COPYRIGHT: (C)2003,JPO
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