Abstract: The significance of normalizing temperature field in grinding is succinctly analyzed. The integrity and homogeneity of the inherent physical quantities was destroyed according to the time dimensionless parameters advanced by previous scholars, which can lead to disordered distributions of the peak and valley temperatures in calculation though using those parameters in normalization. A new kind of time dimensionless parameters is proposed by using the normalizing method based on the dimensional Π theorem, which can be used to normalize the transient temperature field and effectively guarantee the inner relationship between the original quantities in grinding. According to the results of calculation and experimental verification with the previous and present time dimensionless parameters, it is shown that the new dimensionless parameters brought forward are reasonable, and it is also applicable for the transient temperature field in continuous grinding.

Key words: grinding;temperature;time;Π theorem;dimensionless parameters