Spring coiling machine with improved drive means

Metal deforming – With use of control means energized in response to activator... – Sensing tool or tool-linked part

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Details

72 27, 72131, 72140, B21F 302, B21F 3500

Patent

active

040303276

ABSTRACT:
A spring coiling machine with an improved drive means has a pair of feed rolls for advancing wire from a source of supply to a coiling station. Coiling tools at the station obstruct feed movement and form coil springs and a cut-off tool successively severs the springs. The coiling tools and cut-off tool are operated from a camshaft driven by a first electric motor and a second electric motor drives the feed rolls. Continuous rotation for both camshaft and feed rolls is provided by the electric motors and a mechanism operated by the camshaft lifts an upper feed roll to terminate feed roll gripping action on the wire and to thus terminate wire feed at the completion of each spring. The first or camshaft motor serves as a lead motor and the feed roll motor as a follower. A digital feedback from the first motor is introduced to the control system therefor and also as an input to a second control system for the feed roll motor. The second motor also has its own digital feedback and a "ratio set" input is provided through its control system thus accommodating manual selection of motor speed ratio and selection of wire feed length and spring configuration.

REFERENCES:
patent: 2149942 (1939-03-01), Prentice
patent: 2455863 (1948-12-01), Halvorsen
patent: 2902079 (1959-09-01), Costello et al.
patent: 2923343 (1960-02-01), Franks
patent: 3010491 (1961-11-01), Pearson
patent: 3402584 (1968-09-01), Cavagnero
patent: 3610006 (1971-10-01), Scheublein et al.
patent: 3740984 (1973-06-01), Bergevin
patent: 3906766 (1975-09-01), Sato
patent: 3934445 (1976-01-01), Lampietti

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