Improving the accuracy of cutting hot-rolled plate in the mill line

The 2150 plate mill at the Kuznetsk Metallurgical Combine is designed to roll carbon and alloy steels. The plates, which are shipped without heat treatment, are finished in the mill line -- the sides are trimmed on rotary shears, the ends are cropped, and the plate is cut to measured lengths on guillotine shears. The plates arrive at the guillotine shears at different temperatures, depending on the rolling speed and plate thickness. To satisfy the length requirements of GOST 19903-74, it is necessary to take into account the tolerance and plate shrinkage. Plates are presently cut to measured lengths on the guillotine shears using a rule with a marker and a stop. The marker is set with allowance for the GOST tolerance and plate shrinkage from the cutting temperature to 0-20 degree C.