Research and control for rolling torque of the heavy plate mill

摘要

Sometimes main driver motors’ torque exceeds the maximum limit in Baosteel’s 5 m heavy plate mill. Experience showed that torque overloaded occurred in cases of some special rolling sequence and special rolling plate dimension.Most of the overloaded occurred only instantaneous at some time point during the rolling pass, which especially easily happened at the bite and motor acceleration time after the bite.This paper analyzes the impact factors for motor torque overload and carefully studies the key details of the mill rolling speed control.The solution to improve the speed control was given at the precondition of keeping production yield.The implementation of the solution significantly reduced the occurrence of torque overloaded times.