METHOD FOR PRODUCTION SCHEDULING IN SMALL-SCALE ROLLING MILL AND SYSTEM THEREOF

摘要

Provided in the present invention is a method for production scheduling in a small-scale rolling mill, which method comprises the steps of: distributing customer orders to corresponding sequences and randomly selected passes according to steel grade groups and product size codes thereof, so as to generate an initial production schedule; sorting the initial production schedule in ascending order according to the delivery dates thereof, and combining two orders for the same steel grade on the basis of a combining algorithm, so as to generate a combined production schedule; arranging repeatedly a new pass for a combined production schedule when the corresponding total production yield thereof is less than a critical threshold, until the corresponding production yield in the production schedule is greater than or equal to a stop value, then outputting a pass-changed production schedule; and selecting a sequence to be treated from the pass-changed production schedule, and inserting another order into this sequence or using it to replace an order in this sequence, so as to generate an order-changed production schedule. Also provided in the present invention is a system for performing this method. The present invention generally solves the scheduling problems during the production of a rolling mill, such as the distribution, arrangement, and cutting optimization of the billets in stock.