Verfahren zur Herstellung einer Falzverbindung

摘要

A hemming method for performing a 180 degree hem between an inner panel (26) and outer metal panel (24). A curved prehemming tool (54) is then moved in a direction (58) substantially parallel to the plane of the inner and outer panels so that the prehemming tool contacts a protruding coupon (32) on the outer panel and creates a bend line in the coupon at a position spaced outwardly from the outer edge of the inner panel. Thereafter, a final hemming tool (70) moves relative to the panels in a direction substantially parallel to the original plane of the inner and outer panels. This final hemming tool includes a first curved surface (72) which initially contacts the coupon and rolls the coupon such that the edge of the coupon contacts the inner panel. Thereafter, a generally planar wedge section (76) of the final hemming tool contacts the coupon and compresses the coupon against the inner panel thus completing the hemming operation.