Patent ID: 7658421
Filing Date: 2010-02-09
Classification: B21D,B60R

Abstract:
1. A connection member comprising: first and second flange members each having a mounting face to be in contact with a mating face of another member, the first and second flange members being arranged at a distance from each other; a hollow member comprising a pair of ribs connecting the first and second flange members; and an axial member comprising a tubular aluminum alloy material and having both ends fixed to the first and second flange members, respectively, wherein the first and second flange members each have a hole between the pair of ribs, the two ends of the axial member are inserted into the holes and are expanded by electromagnetic forming so as to be in intimate contact with the inner peripheries of the holes, respectively, wherein the holes arranged in the flange members are burred from a front side thereof, and the ends of the axial member spread outward in a radial direction along inner peripheries of the holes, wherein the mounting face of at least one of the flange members is in contact with a mating face of a vehicle bumper reinforcement.