METHOD FOR CONTROLLING VELOCITY OF CARRYING TABLE ROLLER IN HOT ROLLING MILL

摘要

PROBLEM TO BE SOLVED: To make a carrying table roller velocity after biting into rolls to a target velocity by obtaining a velocity correcting quantity from a target current value and an actual current value, and outputting a control signal in a thyrister circuit as the last velocity command value after adjusting the velocity correcting quantity. SOLUTION: At the same time of detecting that the rolling material 2 is loaded on the carrying table rollers 4a-4d at the inlet inside with an HMD arranged at the inlet side of a hot rolling mill 1, the correct value I of motors 13a-13d is stored and this value is made to IF. Successively, the target current IR is set, and the actual value I of the motors 13a-13d is comparison-calculated. The velocity corresponding quantityεis obtd. from the current valueΔIa obtd. by comparison-calculating with a correcting arithmetic part and integrated, and the velocity correcting quantity 'εintegrated to the velocity command value SRN the rollers 4a-4d with the velocity correcting part is adjusted to the actual velocity. The velocity command value SR for the carrying table roller at the inlet side is taken in as the control signal in the thyrister circuit of the carrying table rollers 4a-4d at the inlet side.