Patent ID: 6810707
Filing Date: 2004-11-02
Classification: B21D,Y10T

Abstract:
A tool for forming a hem on a sheet metal assembly comprising an inner panel having an outwardly extending flange and an outer panel having a bendable flange that is initially oriented generally perpendicular to an outer peripheral portion of the outer panel, the tool comprising:a supporting surface on which the outer panel and inner panel are located; a roller having a cylindrical surface and a shaped portion, the cylindrical surface being oriented to contact an inner portion of the bendable flange of the outer panel, the cylindrical surface pressing the bendable flange inwardly toward the outwardly extending flange of the inner panel in a first direction, the shaped portion extending from a first circumferential line at the intersection of the shaped portion and the cylindrical surface to a second circumferential line axially spaced from the first circumferential line and formed by at least two surfaces that together define a cavity relative to a chord extending between the first and second circumferential lines, and wherein the shaped portion engages an intermediate portion of the bendable flange between a bight portion and the inner portion of the flange and applies a force to the intermediate portion at an angle relative to the first direction to compress the hem radially as the cylindrical surface presses against the inner portion of the flange.