Patent ID: 6050474
Filing Date: 2000-04-18
Classification: B23K,B23Q,Y10T

Abstract:
A method of friction stir welding,wherein an end portion of a first member and an end portion of a second member are abutted to each other, to provide an abutted portion of the end portions of the first and second members, said end portion of said first member having a raised part which projects from one surface of the first member, the end portions of the first and second members being abutted to each other in such manner that said end portion of said second member is abutted to at least another part of said end portion of said first member other than said raised part; andwherein relative movement is provided between a rotary body and the first and second members, by rotating the rotary body along said abutted portion, said rotary body having a small diameter portion at a tip end of a large diameter portion, said small diameter portion being inserted to said abutted portion into said at least another part of said end portion of said first member and into the end portion of the second member, said large diameter portion of said rotary body being inserted to said abutted portion including said raised part of said first member, between an extension line of said one surface of said first member and an apex of said raised portion, a boundary between said large diameter portion of said rotary body and said small diameter portion of said rotary body being positioned in the raised part.