摘要:
A method for detecting an eccentricity and phase angle (an angle formed between a predetermined point of a roll and a point at which the maximum eccentricity occurs) of a working or backing roll in a rolling mill without use of detectors directly attached to the peripheral surface of the roll is provided. The rolling pressure is sampled, quantized and fed into an arithmetic unit for calculating the eccentricity and phase angle of the roll based upon the following relations:
摘要:
AN APPARATUS FOR CONTROLLING THE GAGE OF A METAL STRIP FROM ONE STAND OF A MULTISTAND ROLLING MILL HAVING AT LEAST TWO STANDS BY CONTROLLING THE SPEED OF ONE OF THE STANDS IN RESPONSE TO A SIGNAL FROM AN X-RAY GAGE, POSITIONED BETWEEN THESE STANDS, WHICH REPRESENTS DEVIATION FROM EXPECTED GAGE, DELAYED FOR A PERIOD OF TIME EQUAL TO THE TRANSPIORT TIME FOR THAT PORTION OF STRIP CONTAINING THE DEVIATION TO MOVE FROM THE X-RAY GAGE TO THE ROLL BITE OF THE SUCCESSIVE STAND, LESS THE RESPONSE TIME OF THE SPEED REGULATOR OF THE CONTROLLED STAND. THE GAGE DEVIATION SIGNAL IS ADVANCED THROUGH A SHIFT REGISTER CIRCUIT SUCH THAT THE DEVIATION INFORMATION IS STORED WHILE THE STRIP TRAVELS FROM THE X-RAY GAGE TO THE ROLL BITE OF THE STAND. A TACHOMETER PROVIDES A VOLTAGE WHICH CONTROLS THE PULSE RATE-
OF THE SHIFTING PULSES SUCH THAT THE PULSE RATE IS PROPORTIONAL TO THE OUTPUT OF THE TACHOMETER, OR SPEED OF THE STRIP. THE GAGE DEVIATION SIGAL AFTER HAVING BEEN DELAYED IS DIVIDED BY THE GAGE REFERENCE, OR EXPECTED GAGE, SIGNAL FOR PRODUCING A CURRENT SIGNAL WHICH IS PROPORTIONAL TO THE UNIT DEVIATION. THIS SIGNAL IS THEN MULTIPLIED BY THE SPEED REFERENCE SIGNAL TO PRODUCE A VOLTAGE SIGNAL PROPORTIONAL TO THE ABSOLUTE SPEED CHANGE USED FOR ALTERING THE TENSION IN THE STRIP, THE REDUCTION OF THE STRIP BEING CORRECTED SO THAT THE DELIVERED GAGE OF THE STRIP REMAINS CONSTANT.
摘要:
There are provided a work-side position measurement device and a drive-side position measurement device for directly measuring positions of roll chocks in a rolling direction, and positions of upper and lower working rolls and upper and lower backup rolls in the rolling direction are adjusted to zero point or predetermined positions. Alternatively, a change caused in the strip wedge due to a minute crossing of the axes of working rolls and backup rolls is calculated, and the quantities of leveling of a work-side rolling reduction cylinder device and a drive-side rolling reduction cylinder device are adjusted to make the strip edge equal to or smaller than a predetermined value. Accordingly, the bilateral asymmetry (strip wedge) of the thickness distribution of a rolled material is easily adjusted even in the event that the positions of the roll chocks in the rolling direction are changed due to wear on various components.