METHOD OF MAKING WHEEL DISC Russian patent published in 2016 - IPC B21D53/26 B21D22/02 

FIELD: machine building.

SUBSTANCE: invention relates to cold stamping and can be used for making parts like wheel discs and other cylindrical parts with holes, made drawing or moulding. Method comprises cutting a sheet workpiece with punching of holes, from which during further shaping parts of ventilation openings are formed. Further, method comprises drawing, cutting, punching central and fastening holes and final shaping. Punching holes in sheet workpiece, from which during further shaping ventilation holes are formed, is performed completely in flat workpiece with chasing of radii along their edges on outer surface of workpiece, then chasing radii is performed on inner surface of workpiece, drawing operation is performed to leave flat flange, required for further cutting of said flange along outline. Operation of cutting is performed at complex outline with due allowance for producing during final shaping a uniform end of disc, on which it is welded with rim. Final shaping operation is performed to obtain uniformly arranged zones of increased thickness.

EFFECT: reduced radial runout of discs.

1 cl, 15 dwg