Rolling mill eccentricity compensation using actual measurement

Details Rolling mill eccentricity compensation using actual measurement Rolling mill eccentricity compensation using actual measurement

1985-08-30

1987-03-10

Larson, Lowell A.

Metal deforming

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

Including plural sensors or sensor responsive to comparison...

72 8, B21B 3702

Patent

active

046482571

ABSTRACT:
A method of controlling a rolling mill in which eccentricity of one or more of the rolls of the mill ordinarily cause cyclic change in the thickness of the material exiting the mill. The method includes the steps of locating a device for measuring thickness downstream from the mill, and using the device to measure directly cyclic change in the thickness of the mill due to roll eccentricity. Samples of the cyclic change in thickness are provided during a time period defined by a revolution of at least one of the rolls. The samples are processed by characterizing them as frequency, magnitude and phase angle components of the change in thickness. These components are then directed to an update algorithm to provide a current estimate of the change in thickness. The delay between the occurrence of the change in thickness in the mill and the occurrence of the measurement of the change by the thickness measuring device is calculated and translated into a phase angle component. The current estimate of the phase angle is modified by the angle due to the delay in actual measurement of thickness such that the results of the step of measuring thickness are made coincident with the occurrence of the thickness change in the mill. The current estimate of thickness change is now processed in a manner that returns the estimate to time-based values; such values are then used to correct roll eccentricity by controlling the working gap of the mill in a manner that offsets the effects of roll eccentricity.

REFERENCES:
patent: 3928994 (1975-12-01), Ichiryu et al.
patent: 4220025 (1980-09-01), Baba et al.
patent: 4545228 (1985-10-01), Yamaguti et al.

Affiliated with

Also associated with

Rating

Rolling mill eccentricity compensation using actual measurement does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rolling mill eccentricity compensation using actual measurement , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rolling mill eccentricity compensation using actual measurement will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1015521