Method and apparatus for wheel manufacture

Details Method and apparatus for wheel manufacture Method and apparatus for wheel manufacture

B - Operations, Transporting

21

H

26/190, 113/73

B21H 1/02 (2006.01) B21D 22/04 (2006.01) B21D 53/26 (2006.01)

Patent

CA 1332542

Method and apparatus for punch forming center pilot opening or other wheel mounting surfaces in a pierceable metal preformed wheel disc blank mounted internally of the wheel rim. A combination pierce and shave punch forms the disc opening in a single working stroke and produces a one-piece scrap slug containing both the pierced and shaved metal removed from the disc. The punch has a correlated dimensional relationship between disc material thickness, pierce punch diameter, shave punch diameter and shave punch set back from the pierce punch. A smoother, more cylindrical and more dimensionally consistent opening surface is obtained than with conventional pierce- only punches.

613227

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