Patent ID: 6290117
Filing Date: 2001-09-18
Classification: B23K

Abstract:
A method of friction stir welding, comprising:abutting increased thickness portions of two members to be subjected to welding, each member having an increased thickness portion which protrudes from one face thereof at an end portion of said member to be subjected to welding;including a small diameter portion of a rotary body, which has said small diameter portion at a tip end of a large diameter portion, into said increased portions of said members to be subjected to welding to an extent that a boundary face between said large diameter portion and said small diameter portion of said rotary body is positioned between an extension line of said one face of said members to be subjected to welding, including said increased thickness portions, and an apex of said increased thickness portions of said members to be subjected to welding; androtating and moving said rotary body along a welding line while reciprocating said rotary body in a direction orthogonal to said welding line between the two members to be subjected to welding.