轧辊随机磨损模型及其最优更换策略研究  

Research on Stochastic Wear Model of Roller and Its Optimal Replacement Policy

作　　者：张炯[1] 张晓红[1] 曾建潮[1] 赵静[1] 

机构地区：[1]太原科技大学工业与系统工程研究所,太原030024

出　　处：《太原科技大学学报》2016年第5期379-384,共6页Journal of Taiyuan University of Science and Technology

基　　金：国家自然科学基金(61573250);山西省自然科学基金资助项目(2014011019-2)

摘　　要：轧辊是轧机上使得轧件产生塑性变形的主要功能部件以及轧制过程中的主要消耗零部件,其磨损程度直接影响着轧制产品的产量与合格率。由于现有轧辊的定期更换周期来源于轧辊厂商的实验或轧钢厂的长期运行经验,容易导致轧辊的过早或过晚维修。针对这一问题,以某厂1780 mm热连轧轧辊为对象,从概率论和可靠性理论的角度出发,利用轧辊每次更换和检测所得的大量修磨数据,研究并建立轧辊磨损的随机可靠度模型,并在此基础上建立以平均最小更换成本为目标的最优更换模型。通过实例计算得到了符合实际生产状况的轧辊最优更换周期,检验了所建模型的可行性和有效性。Roller is an important tool for rolling plastic deformation and is the mill＇s main consumption part, its wear degree directly influences the production and the qualified rate of rolled products. The existing regular replacement cycle of roller that easily leads to maintenance too early or too late is got from roll manufacturers＇ experiments or rolling mill＇s long-term running experiences. The optimal replacement model of the minimum average replacement cost is established based on the random reliability model of roll wear which takes the factory 1780mm hot strip roll- ing roll as an object and uses the roller grinding data from each replacement and test data of roll grinding from the perspective of probability theory and reliability theory. The feasibility and effectiveness of the model are verified by an example to calculate the optimal replacement cycle of roll that conforms to actual production situation.

关 键 词：轧辊表面磨损 随机磨损建模 可靠度 更换策略优化 

分 类 号：TG331[金属学及工艺—金属压力加工]