Patent ID: 6273323
Filing Date: 2001-08-14
Classification: B23K,B61D,Y02T

Abstract:
A method of manufacturing a structural body, comprising the steps of:starting friction stir welding by inserting respective rotary tools into respective welding joints of members to be welded;at a first position, stopping the friction stir welding performed by one of said rotary tools by withdrawing said one of said rotary tools from its welding joint, while continuing movement along said welding joint by said one of said rotary tools accompanying the movement of others of said rotary tools;at a second position, stopping said movement of said respective rotary tools along their welding joints and stopping the friction stir welding of said others of said rotary tools by withdrawing them from their welding joints;inserting said respective rotary tools to a predetermined depth in their respective welding joints; andstarting friction stir welding by starting movement of said respective rotary tools along their respective welding joints.