Combined with the characteristics of medium and high frequency induction heating, a dual frequency induction heating process is proposed to obtain a more uniform field model in the induction heating process of bevel gear. When the structure of induction coil is determined, the frequency ratio and output time ratio of medium and high frequency current affect the efficiency and quality of induction heating of bevel gear. In this chapter, through the finite element software ANSYS, the segmented dual frequency induction method is adopted to numerically simulate the dual frequency induction heating process of bevel gear through control variables, analyze the characteristics of dual frequency induction heating, analyze the temperature field model obtained by induction heating from the tooth profile direction and tooth width direction of bevel gear, and explore the frequency ratio of medium and high frequency current The influence of process parameters such as current density ratio on the dual frequency induction heating process of bevel gear.
Using the method of segmented dual frequency induction heating, the dual frequency induction heating process of bevel gear is explored, and the variables that may affect the dual frequency induction heating process are analyzed. Through the time history treatment of the temperature of point L2 in the dual frequency heating process, it is pointed out that the parameters such as the switching times of medium and high frequency current and the output time ratio directly affect the temperature field model of dual frequency induction heating of bevel gear.
By analyzing the induction heating process of bevel gear, the relationship between magnetic induction intensity B and temperature field t is explained. The temperature field model obtained by single frequency induction heating is compared with that obtained by dual frequency induction heating. It is revealed that compared with single frequency induction heating, dual frequency induction heating can obtain a more uniform temperature field model.
The uniformity of dual frequency induction heating temperature field is analyzed by using bevel gear tooth profile paths L1-L2, L3-L4 and tooth width paths a-a1, b-b1 and c-c1. Through the analysis of path temperature distribution uniformity and temperature difference comparison, it is pointed out that a more uniform bevel gear temperature field model can be obtained by optimizing process parameters such as medium and high frequency current density ratio, frequency ratio and switching time.