Continuous extrusion of metals

Details Continuous extrusion of metals Continuous extrusion of metals

1984-01-27

1986-08-12

Larson, Lowell A.

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

72256, 72257, 425 79, B21C 3502

Patent

active

046048804

ABSTRACT:
A continuous extrusion product issuing from a continuous extrusion apparatus is threaded through a treatment die (to change its cross-section) and is continuously drawn therethrough by a tensioning device controlled by a system which (a) senses the temperature of the product as it leaves the extrusion apparatus, (b) converts (in a function generator) a temperature signal so produced into a tension reference signal, (c) compares a tension feedback signal (derived from a sensor adjacent the extrusion apparatus) with that tension reference signal, and (d) controls the tensioning device in accordance with the difference of the tension reference and feedback signals so as to prevent the sensed tension in the product (extending between the extrusion apparatus and the treatment die) from exceeding a safe value which is less than the yield stress tension of that product at the sensed temperature.

REFERENCES:
patent: 2830643 (1958-04-01), Harris
patent: 3122434 (1964-02-01), Reed et al.
patent: 3212309 (1965-10-01), Wilson
patent: 3277527 (1966-10-01), Essers et al.
patent: 3540248 (1970-11-01), Hostetter et al.
patent: 3683471 (1972-08-01), Lemelson
patent: 4101253 (1978-07-01), Etherington

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