摘要
考虑磨粒在砂轮表面随机分布对接触区热流密度分布的影响,基于未变形磨屑厚度的瑞利分布理论,假定流入工件的热流密度呈瑞利分布,建立了瑞利分布热源模型。采用基于有限元法的瑞利分布热源模型对典型磨削工况进行仿真计算,将计算结果与矩形分布及三角形分布仿真结果进行对比,系统地分析了热源模型、磨削液对温度场的影响规律。结合磨削实验测量值,发现基于瑞利分布的热源模型仿真结果与实验测量值吻合较好。
On the basis of Rayleigh＇s probability density function of undeformed chip thickness and considering the influences of grain tips＇ randomness on the heat flux,the heat flux entering the workpiece was assumed to have a Rayleigh distribution,a Rayleigh distribution heat source model was developed to evaluate the temperature field in surface grinding.The FEM simulation for some typical grinding conditions were carried out by using the Rayleigh distribution heat source model,the simulation results were compared with those obtained from triangle heat source model and rectangle heat source model,the influences of heat source model and grinding fluid on the temperature field were investigated.By comparing with experimental results,agood agreement is found between the FEM results obtained from Rayleigh distribution heat source model and experimental results.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2015年第4期484-490,共7页
China Mechanical Engineering
基金
上海市研究生创新基金资助项目(JWCXSL1402)
关键词
热源模型
磨削温度场
有限元仿真
磨削液
heat source model
grinding temperature field
finite element simulation
grinding fluid
