FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and maybe used for production of wheel fasteners. Billet is cut to pre-head cylindrical head in diameter equal to that of hexagon circumscribing circle at first step of forming. At second step, rod and hexagonal head with edging for flange are reduced. At third step, hexagonal head and flange are finally headed while rod is gaged for thread cutting and facet is formed at its end. All jobs including thread cutting are made at one multi-position cold heading machine.
EFFECT: higher quality of bolts and tool durability, decreased metal input.
1 dwg
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