Metal deforming – With cutting – By composite tool
Patent
1986-03-31
1988-04-12
Crane, Daniel C.
Metal deforming
With cutting
By composite tool
72333, 2915901, 83192, 83465, 83862, 83926R, B21D 5326, B21D 2830
Patent
active
047366117
ABSTRACT:
A method and apparatus for forming bolt and center-pilot mounting openings in vehicle wheels, particularly styled-disc vehicle wheels. A preformed rim and disc assembly is engaged and fixtured around the rim bead seat with the inboard disc face resting on a lower die assembly and without plastic deformation to the rim or disc. An upper die assembly having an array of bolt hole punches is moved into piercing-and-coining engagement with the disc to form the bolt openings continued motion of the upper die assembly against the wheel disc pushes the disc and lower die assembly into shearing engagement with a center punch which forms the center-pilot opening. The axes of the bolt openings and/or center pilot opening and/or bead seats may be aligned or offset from each other.
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patent: 3131972 (1964-05-01), Walton et al.
patent: 3580043 (1971-05-01), Gollwitzer
patent: 3581550 (1971-06-01), Waterbury
patent: 3688373 (1972-09-01), Gregg
patent: 3855837 (1974-12-01), Philipp
patent: 4279287 (1981-07-01), Daudi et al.
patent: 4354407 (1982-10-01), Daudi et al.
Crane Daniel C.
Motor Wheel Corporation
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