Puncher

Details Puncher Puncher

B - Operations, Transporting

21

D

B21D 28/34 (2006.01)

Patent

CA 2603350

A puncher is used when piercing a workpiece with a piercing punch while the workpiece is kept pressed by a stripper. The cover provided on the puncher is made of metal and a diameter of a cover portion at and near a tip end side is smaller than that of the other cover portion other than the cover portion. The other cover portion of the cover receives a biasing member. The cover portion at a tip end side gradually reduces its diameter toward the tip end to form a tapered portion. The puncher provides a long lifetime, guarantees sufficient pressing force onto a workpiece, and punches a hole at a position near and nearer a corner of the workpiece having adjacent metal plate surfaces forming an angle of from 90 degrees to 95 degrees at the corner.

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