Cup nut mass production process

Details Cup nut mass production process Cup nut mass production process

1974-09-18

1976-05-11

Lanham, C. W.

85 35, B21D 5324

Patent

active

039552314

ABSTRACT:
The present process is especially suitable for economically producing cup nuts in large quantities by conventionally manufacturing the nuts and by deep drawing the cups separately from sheet metal in a single step to provide the cup with an outwardly facing chamfer along its edge surrounding the open end of the cup. In other words, the chamfer is produced as the result of the deep drawing step. The cup and the nut are connected by applying pressure and welding current whereby the pressure is applied just prior to, during and shortly after the welding to produce an intimate bond between the nut and cup. Due to the chamfer the welding bond forms an inwardly facing butt welding seam preferably running all around the edge of the cup, whereby a machining after the welding is avoided.

REFERENCES:
patent: 2183563 (1939-12-01), Hart
patent: 2467391 (1949-04-01), Kerr et al.
patent: 2931888 (1960-04-01), Thome
patent: 3029507 (1962-04-01), Gaggini

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