Patent ID: 8250728
Filing Date: 2012-08-28
Classification: B21J,B23K,F16B,Y10T

Abstract:
1. A method of joining a multiple member work-piece, comprising: stacking members of the work-piece on a die with a first of the members resting on the die; driving a rivet into the stacked members until the rivet penetrates all of the members and extends only partially through said first of the members and deforms to establish a riveted joint; welding the driven rivet to said first of the members to strengthen the riveted joint; wherein the welding includes passing an electrical current through the driven rivet and said first of the members; wherein the die includes a first portion axisymmetric with an annular second portion; and wherein the first portion and second portion are electrically isolated from one another so that the electrical current is passed from the second portion to the first portion through the stacked members and the rivet.