A METHOD OF MANUFACTURING INTEGRAL WHEEL RIM AND DISC ASSEMBLY OF A 5 TAPER BEAD-SEAT OF FLAT OR SEMI-DROP CENTER RIM AND INTEGRAL WHEEL CONSTRUCTION

摘要

This invention relates to a construction, apparatus and a method of producing integral wheel rim and disc assembly of a 50 taper bead-seat of flat or semi-drop center rim, providing a generally circular steel blank from a sheet stock of pre-determined uniform thickness, the blank is preferably with a center hole pierced to a predetermined size. The blank is preformed in spinning machine to a predetermined profile & shape, such preform is further spun and flow formed in a spinning machine, the preform being positioned between an outer roll & inner mandrel and held against the clamping plate, such inner mandrel comprise of a outboard surface which conforms to the predetermined inner diameter of the rim comprising of gutter portion, the well, the bead-seat and fixed flange and such outer roll comprise of outboard surface which confirms to the final shape and profile of the gutter wall. The preform peripheral portion is then forward & revere spun against the outboard surface of the inner mandrel & outboard surface of the outer roll to a the final profile and shape of the gutter wall and predetermined profile & form of well, bead-seat, fixed flange respectively. The spun rim comprising of gutter, well and bead seat is further spun and flow formed in a spinning machine, being positioned between an outer mandrel and an inner clamping plate, such outer mandrel comprise of a inboard surface which conforms to the final shape of the fixed flange and 50 angle to the bead-seat, is spun and flow formed against the inner surface of the outer mandrel by a shaping roller of predetermined shape to form the final shape of the fixed flange and 50 bead-seat