Metal deforming – By deflecting successively-presented portions of work during... – To form helical coil or tube
Patent
1978-07-31
1980-06-03
Combs, Ervin M.
Metal deforming
By deflecting successively-presented portions of work during...
To form helical coil or tube
72143, 140124, B21F 304
Patent
active
042055431
ABSTRACT:
A spring winder includes a base and a mandrel rotatably held against the base by a pair of mounting blocks which include aligned grooves in which the mandrel is seated. Each block is connected to the base by a pair of mounting screws which cooperate with associated compression springs for resiliently holding the mandrel between the mounting blocks and the base with a variable force. A length of spring wire is fed between a cam and washer rotatably mounted on the side of the base by means of an adjustment screw, the wire then being fed through an aperture in the adjacent end of the mandrel. The cam and washer are resiliently urged together by a compression spring for applying a drag to the wire which is variable by adjustment of the associated screw. A pin on the washer rides in a complementary groove in the cam for retaining the wire in position. As the mandrel is rotated the wire is wound thereon against the drag of the cam and washer to form a series of helical coils. The cam has a wedge-shaped camming surface thereon which is insertable between adjacent coils of the wire on the mandrel to establish the spacing between adjacent coils. Rotation of the cam permits adjustment of this spacing. A double-wedge cam is also disclosed for forming either right-hand or left-hand springs.
REFERENCES:
patent: 952582 (1910-03-01), Ritter
patent: 1013239 (1912-01-01), Titus
patent: 1403372 (1922-01-01), Armstrong
patent: 1671983 (1928-06-01), Faust
patent: 2367320 (1945-01-01), Walters
patent: 2592590 (1952-04-01), Oberg
patent: 2650638 (1953-09-01), Johnson et al.
patent: 3423980 (1969-01-01), Ludwig et al.
patent: 3807210 (1974-04-01), Richert et al.
Combs Ervin M.
Snap-on Tools Corporation
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