Method of wheel manufacture for correcting rotational non-unifor

Details Method of wheel manufacture for correcting rotational non-unifor Method of wheel manufacture for correcting rotational non-unifor

1987-12-14

1989-04-11

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72327, 2915901, 83926R, B21D 5326

Patent

active

048194727

ABSTRACT:
A method and apparatus (50 or 110) for forming bolt and center-pilot mounting openings (36, 30) in vehicle wheels (16 or 112), particularly styled-disc vehicle wheels. A preformed rim and disc assembly is engaged and fixtured around the rim bead seat (20, 22) with the inboard disc face resting on a lower die assembly (82) and without plastic deformation to the rim or disc. An upper die assembly (52) having an array of bolt hole punches (56) is moved into piercing-and-coining engagement with the disc to form the bolt openings. Continued motion of the upper die assembly pushes the disc and lower die assembly into shearing engagement with a center punch (76or 76a or 76b) which forms the center-pilot opening. The axes (BH, CH, BS) of the bolt openings and/or center-pilot opening and/or bead seats may be aligned or offset from each other.

REFERENCES:
patent: 3530717 (1970-09-01), Gregg
patent: 3688373 (1972-09-01), Gregg
patent: 3855837 (1974-12-01), Philipp
patent: 4279287 (1981-07-01), Daudi et al.
patent: 4490079 (1984-12-01), Trevarrow

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