Patent ID: 6473967
Filing Date: 2002-11-05
Classification: B21D,B60B,Y10T

Abstract:
A method for forming a full face fabricated steel vehicle wheel comprising the steps of:(a) providing a partial wheel rim formed from steel and defining a generally horizontal rim axis and including a generally axially extending well portion and a pair of opposed ends, one of the ends including an inboard tire bead seat retaining flange and an inboard tire bead seat, and the other end including an outboard tire bead seat; (b) providing a generally circular wheel disc blank formed from steel and including an inner annular wheel mounting portion and an outer annular portion, the inner annular wheel mounting portion including an inner surface which defines a generally vertical disc axis which is generally perpendicular to the horizontal rim axis; (c) subjecting the wheel disc blank to a series of metal forming operations to produce a finished full face wheel disc having a final profile, the finished full face wheel disc having an outer annular portion, an inner annular wheel mounting portion, and an intermediate portion extending between the outer annular portion and the inner annular portion, the intermediate portion having a generally convex profile with respect to the vertical disc axis as viewed in an outboard facing direction and which extends throughout the entire length thereof from about the outer annular portion to about the inner annular portion, the series of metal forming operations including the steps of: (c1) initially stamping the steel disc blank to produce an initially formed full face steel wheel disc having a generally straight or convex shaped intermediate bowl and defining a first axial distance between an inner surface of the outer annular portion and an inner surface of the inner annular wheel mounting portion; (c2) subjecting the initially formed full face steel wheel disc to an intermediate metal forming operation to produce a partially formed fill face steel wheel disc having a generally convex shaped intermediate bowl and defining a second axial distance between the inner surface of the outer annular portion and the inner surface of the inner annular wheel mounting portion, the second axial distance being greater than the first axial distance; (c3) subjecting the partially formed full face steel wheel disc to a final metal forming operation to produce a fmished full face steel wheel disc having a predetermined disc profile including a generally convex shaped intermediate bowl and defining a third axial distance between the inner surface of the outer annular portion and the inner surface of the inner annular wheel mounting portion, the third axial distance being generally equal to the second axial distance; and (d) joining the finished full face steel wheel disc to the partial steel wheel rim by welding to produce the full face fabricated steel vehicle wheel.