COLD PRESSURE WELDING CONSTRUCTION METHOD AND COLD PRESSURE WELDING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a cold pressure welding construction method which prevents a material to be joined from warping up due to pressurization thereto, and also promotes plastic deformation of a joined interface of the superposed materials to be joined to secure high joint strength, and to provide a cold pressure welding apparatus.;SOLUTION: The cold pressure welding construction method includes steps of: squeezing the materials 7a, 7b to be joined that are superposed on a die 6 by pressurizing with a projection 11 of a punch 10; holding the circumference of the pressurized part by a shoulder part 12 of the punch overhanging outward in a direction perpendicular to the proceeding direction thereof from a proximal part of the projection, after squeezing part of the materials be joined by the projection; and completing the squeezing operation by the punch 10 while a gap G is left in a region that is surrounded by an inner corner part 11a defined by the projection 11 and the shoulder part 12 of the punch 10, and the upper material 7a to be joined.;COPYRIGHT: (C)2013,JPO&INPIT