Automatic control on strip continuous processing lines

Metal deforming – With use of control means energized in response to activator... – Metal deforming by use of roller or roller-like tool element

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226 8, B21B 3700

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active

046336940

ABSTRACT:
Gradual acceleration/deceleration of continuous strip processing lines is achieved by suspending manual selected acceleration/deceleration control in favor of predetermined low acceleration/deceleration rates when the line speed is below a pre-established value. Line speed is monitored as a function of the amplitude of a control signal used to drive an amplitude-responsive, variable speed motor. The control signal is derived from an integrator used to integrate a command signal level representing the operator-selected acceleration/deceleration rate. When the control signal amplitude is below a pre-established value, a reference signal level, representing a lower acceleration/deceleration rate than that selected by the operator, is applied to the integrator in lieu of the command signal. A plurality of gradually increasing acceleration rates may be automatically effected until the speed of the continuous strip processing line achieves a pre-established level.

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