Punch and die apparatus for producing flat stamped contact devic

Details Punch and die apparatus for producing flat stamped contact devic Punch and die apparatus for producing flat stamped contact devic

1992-06-29

1993-11-23

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72335, 72339, 29874, B21D 2814, B21D 2816

Patent

active

052633535

ABSTRACT:
Flat stamped electrical contact device (2) has a contact edge (8,8') which extends from the first major surface (4) to the second major surface (6) of the device. The contact edge surface (8,8') is smooth for substantially its full width and does not have a fractured portion or a burr extending from the second major surface (6). The smooth straight surface is produced by steps of coining the opening produced during the initial punching operation at a location adjacent to the second major surface after the opening has been punched and then shaving the edge to produce the finished contact surface.

REFERENCES:
patent: 2843927 (1958-07-01), Stock
patent: 3327372 (1967-06-01), Berg
patent: 4184242 (1980-01-01), Petrie
patent: 4211099 (1980-07-01), McGonigal
patent: 4857019 (1989-08-01), Brubaker

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