| 摘要 |
PROBLEM TO BE SOLVED: To provide a tip for ultrasonic pressure welding which can obtain a firm joint portion having soundness and reliability without causing any cracks and sticking in the joint portion after ultrasonic pressure welding, and also without causing any deformation in the surface layer portion of the joint portion, and to provide an ultrasonic pressure welding method using the tip. SOLUTION: An aluminum sheet and a steel sheet which are stacked are arranged as a stacked base material between a cylindrical tip and an anvil in a ultrasonic pressure welding apparatus, the stacked base material is pressurized with the tip and anvil, and ultrasonic waves are applied to the tip, thus they are subjected to ultrasonic pressure welding. The point part of the tip is formed so as to be a convex shape continuously continuously changing from the shoulder part. COPYRIGHT: (C)2005,JPO&NCIPI |
