摘要
考虑工件材料物理性能与温度的非线性关系,假定进入工件的热流密度呈抛物线分布,采用圆弧热源模型对一些典型的磨削工况进行三维有限元仿真,研究平面磨削时工件表面因热载荷而引起的温度变化。将计算结果与实验值进行比较,发现有限元仿真值与实验测量值相当接近。根据仿真获得的温度场分布结果,结合工件材料金相组织转变的临界温度,可以预测工件的热影响程度。
The heat flux entering the workpiece was assumed to have a parabolic distribution and the physical properties of the workpiece material were considered non--linear according to the temperature. Three dimensional FEM simulations for some typical grinding conditions were carried out by using the circular arc heat source model to investigate the temperature field in the contact zone due to thermal loading of the workpiece in surface grinding. The simulation results are compared with those obtained from experimental measurements. A good agreement is found between the FEM results and experimental observations. The heat affected zones of the workpiece can be predicted from the temperature fields derived from the simulation, considering the critical temperatures for metallographic transformation.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2009年第5期589-595,共7页
China Mechanical Engineering
基金
国家自然科学基金资助项目(50675063)
关键词
平面磨削
磨削温度
有限元仿真
热量分配
surface grinding
grinding temperature
finite element simulation
energy partitioning
