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

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.