考虑实时库存的轧制计划调整模型及算法

在冷装工艺生产模式下,不合理的轧制计划将导致不必要的钢坯库倒垛作业,严重时甚至会造成轧制生产的延迟或中断.本文在已知轧制计划和实时钢坯库存堆放情况的前提下,对轧制计划设置了三种调整策略:轧制钢坯替换、轧制单元内钢坯轧制顺序调整以及计划钢坯取消轧制调整.基于调整策略,建立了以最小化调整惩罚及实施计划时的钢坯库倒垛次数的加权平均和为目标的数学模型,并结合问题特征设计了三阶段求解算法(THA).通过基于实际生产数据的实验验证,结果相对于原轧制计划,在满足轧制工艺规程前提下大量减少了钢坯库的倒垛次数,算法和模型是可行且有效的.

Adjustment model and algorithm of rolling plan based on real-time warehouse

Due to the effect of unreasonable rolling plan, there will produce needless shuffles in the billet warehouse, and even bring production delays or interruptions, which particularly prominent in the cold technology production mode. Three adjust strategies are set to adjust the rolling plan under the premise of the real-time billet stacked situation and given rolling plan. They are billet replacement, the adjustment of the rolling billets order and the cancellation of rolling billets respectively. A mathematical model is established with the objective of the weighted average sum of two factors, which minimize the adjustment of penalty and the shuffles of the billet warehouse. A three-phase algorithm is designed to solve the problem and verified by actual production data, the result shows that the shuffles of the billet warehouse are reduced significantly comparing to the original rolling plan with this prerequisite of meeting rolling process. The algorithm and model are feasible and effective.