Metal deforming – By use of non-deforming work-gripping clamp and relatively... – With interrelated clamp closer and tool mover
Patent
1993-02-19
1994-05-31
Crane, Daniel C.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
With interrelated clamp closer and tool mover
72452, 2924358, B21D 3902
Patent
active
053158555
ABSTRACT:
A workpiece engaging apparatus forms a hem at the edges of two overlapping sheets or workpieces. A plurality of guide members are pivotally interconnected at one end and have selectively shaped cams formed therein which are traversed by a cam follower driven by a linear drive. The cams and cam follower interact to pivot a hold down member mounted on one of the guide members into engagement with the overlapping workpieces to stationarily hold the workpieces during the hemming operation prior to the engagement of a hem bar attached to another of the guide members with an upstanding edge on one of the workpieces. Pivotal movement of the guide member having the hem bar attached thereto bends the flange of one of the workpieces around and over the edge of the adjacent workpiece to form a hem between the workpieces.
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