Stamping apparatus and method of use
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United States of America Patent
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Sep 1, 2015
Grant Date -
Dec 5, 2013
app pub date -
Jun 1, 2012
filing date -
Jun 1, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A stamping apparatus includes a lower die defining a cavity, with a land portion surrounding the cavity. A movable upper die includes a drawing punch that corresponds to the cavity. A binder movable towards the land portion of the lower die engages an edge portion of the blank, wherein the land portion of the lower die and the movable binder each include a plurality of beads that crimp the edge portion of the blank when the movable binder engages the edge portion of the blank. The plurality of beads are oriented orthogonal to a terminal edge of the edge portion. By orienting the plurality of beads in this manner, the crimped edge portion of the blank is allowed to move inboard towards the cavity when the blank is engaged by the drawing punch before being constrained by a throat portion defined by the binder and the lower die.
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