Process and apparatus for the production of oval chain links fro

Details Process and apparatus for the production of oval chain links fro Process and apparatus for the production of oval chain links fro

1985-11-07

1987-07-21

Spruill, Robert L.

Chain, staple, and horseshoe making

Chain making

Bending

59 23, 59 351, B21L 102

Patent

active

046809260

ABSTRACT:
The chain links are bent in a single bending station, using a single mandrel. Pieces of wire of a given uniform length are bent into a V-shape between a holder and a suitably shaped recess in the mandrel. A wire feed sleeve and a wire receiving sleeve are disposed opposite one another defining a wire path between the holder and mandrel. Wire guides having guide surfaces guide the wire in its feed path from the feed sleeve to the receiving sleeve. The receiving sleeve has an abutment member provided with a support surface which, with the feed sleeve, prevents the leading and trailing ends of the wire piece from moving in a direction perpendicular to the direction of wire feed during the V shape bend. The two sleeves, each of which is formed together with a bending tool, are then retracted to free the wire ends, and the bending tools are moved perpendicular to the wire feed direction to bend the wire ends around the mandrel into a C-shape. The wire ends are then bent around the same mandrel to bend the wire ends into an O-shape to close the link.

REFERENCES:
patent: 2533325 (1950-12-01), Miller et al.
patent: 3714776 (1973-02-01), Lange
patent: 3811268 (1974-05-01), Rahn
patent: 3961474 (1976-06-01), Esser
German publication "Draht", vol. 12, pp. 632, 633, 12/1976.

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