Method for manufacturing coil springs

Details Method for manufacturing coil springs Method for manufacturing coil springs

1992-09-29

1993-09-14

Echols, P. W.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

72138, 140103, B21F 3500

Patent

active

052437469

ABSTRACT:
A method of manufacturing coil springs being performed by giving priority to the free length of coil springs with a feature that the length of wire material used for forming initial- and main-coiling sections and an end coiling section of a single coil spring is measured and checked if the used wire material is within a predetermined length so that the resulted coil springs have a high rate of satisfactory products with a high level of precision.

REFERENCES:
patent: 3427838 (1969-02-01), Rimmer
patent: 4112721 (1978-09-01), Takase et al.
patent: 4991277 (1991-02-01), Itaya

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