TiAl合金低压涡轮叶片榫头磨削温度场研究  

Research on temperature field during grinding of low-pressure turbine blade tenon of TiAl alloys

作　　者：奚欣欣 陈涛[1] 丁文锋[1] XI Xinxin;CHEN Tao;DING Wenfeng(College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《金刚石与磨料磨具工程》2020年第5期17-22,共6页Diamond & Abrasives Engineering

基　　金：江苏省研究生科研与实践创新计划项目(KYCX18_0256)。

摘　　要：TiAl合金低压涡轮叶片榫头磨削过程中温度分布较为复杂,因此采用有限元法模拟温度分布特征。介绍几何模型建立、传入工件的热量比例的确定以及热源的选择和加载等重要细节。最高磨削温度的仿真和试验结果差异约为15%,验证了模型的合理性。仿真结果表明:开始磨削后,工件表面的温度逐渐升高直至稳定。磨削过程的最高温度出现在齿顶圆弧处,比齿根处的最高温度高约30%~40%,原因是型面各处热传导条件存在差异。磨削温度随磨削速度、工件进给速度升高和切深增大而逐渐升高。The temperature distribution,when grinding low-pressure turbine blade tenon of TiAl alloys,is complicated.To study its characteristics,the finite element analysis(FEA)method was used.The main procedure was provided,including the geometric modeling,the determination of energy partition and the selection and the load of the heat source.The feasibility of the model was verified by grinding experiment,with the error between the simulated and measured temperatures of about 15%.Results reveal that the temperature gradually increases and then stays stable.The maximum temperature value appears at the top of the tenon teeth,which is 30%~40%higher than that at the teeth root.This is attributed to the difference of thermal-conduction condition at different regions.The grinding temperature gradually increases with increasing grinding speed,workpiece infeed speed and depth of cut.

关 键 词：TIAL合金 磨削温度 有限元分析 叶片榫头 

分 类 号：TG58[金属学及工艺—金属切削加工及机床]