四辊PC轧机辊间接触应力及支承辊疲劳损伤分布研究  

RESEARCH ON THE CONTACT STRESS OF ROLLS AND FATIGUE DAMAGE DISTRIBUTION OF BACKUP ROLL IN FOUR HIGH PC MILL

作　　者：徐文博 秦晓峰 徐颖杰 XU WenBo;QIN XiaoFeng;XU YingJie(Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 450052,China;College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]郑州机械研究所有限公司,郑州450052 [2]太原理工大学机械与运载工程学院,太原030024

出　　处：《机械强度》2020年第5期1238-1242,共5页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51805355);山西省回国留学人员科研教研项目(HGKY2019020)资助。

摘　　要：四辊轧机辊系中辊间循环接触应力引起的辊身接触疲劳损伤,会影响辊身的磨损、轧辊的后续磨削及使用寿命;因此分析不同轧制工艺参数情况下辊间接触应力的分布对分析辊身损伤以及现场轧辊维护具有重要的意义,以某厂1880轧线采用的四辊PC轧机为研究对象,采用有限元法分析了不同工艺参数对辊间接触应力分布及分布均匀度的影响规律;基于损伤累积理论建立了轧辊辊身截面损伤分布计算模型并计算了辊身轴向截面内的接触疲劳损伤分布,与现场辊身疲劳硬化测试结果对比表明理论分析结果具有一定的合理性。The contact fatigue damage of the roll body caused by cyclic contact stress between rolls in four high mill will not only influence the wear of it,but also subsequent grinding and using life.It is of great significance to analyze the distribution of contact stress between rolls under different rolling process parameters for analyzing the damage of rolls and roll maintenance.The finite element method was used to study on the influence of different process parameters on the contact stress distribution and stress distribution uniformity of rolls used in a four high PC mill of 1880 rolling line.The fatigue damage distribution in the axial section of roll body was theoretically calculated by model established based on the damage accumulation theory.The tested fatigue hardening distribution was used to comparing with the theoretical distribution and it is revealed that the theoretical results have some rationality.

关 键 词：四辊轧机 接触应力 疲劳损伤 硬化 

分 类 号：TG333.17[金属学及工艺—金属压力加工] TH114[机械工程—机械设计及理论]