Finite Element Simulation And Optimization Of Ball Screw Induction Heating

Induction heating is fast, efficient and well-proportioned, and it possesses many advantages such as high-grade production, no pollution, good controllability and easy to achieve automatic, so it developed very fast in the recent years. The induction quenching process of ball screw can perfectly resolve the contradiction about performance requirements inconsistent between the surface and center, Not only can improve the strength, hardness and wear resistance of surface, and can keep the plasticity and toughness of the center, so as to improve the ability of bearing load impact, abrasion resistance and fatigue resistance. The computer numerical simulation method of describing the induction heating process can predict the temperature field distribution of the work piece, find the access to determine the hardened layer depth of heating process, and then modify the relevant parameters to optimize processing property. Therefore, the finite element modeling of induction quenching has a realistic significance.Aiming at the difficulty in measuring for induction heating, based on the electromagnetic theory and thermal theory, it constructed the mathematic analysis models of the ball screw performing electromagnetic field, temperature field, the induction heating simulation steps of ANSYS were introduced, According to the analysis and the results of induction heating process, we got the corresponding conclusion.The influences of radiation, current density, current frequency to the induction heating process were introduced. Finally, concluding that:The higher the temperature is, the more obvious effects of radiation; the current density values affects the ultimate level of heating temperature, if the current density values is large enough, the temperature of induction heating can reach Secondary phase transition temperature, After that the temperature rise curve will have a different trend; The current frequency affects the penetration depth of material, which will affects the temperature difference between the surface and the center after induction hardening. High frequency can improve the surface temperature rapidly in a very short period of time, while improving the thermal efficiency.Along with the time changing, the current density loading unit changes, General rules of ball screw induction heating in mobile single-turn coil were researched. Some conclusions are drawn from the simulation results; there is a problem that the temperature difference of outer surface and raceway of screw is too large. With double coil for induction heating, the result is better.The conclusion of this paper provides reference basis for reasonable choice of heating parameters, and provides a theoretical basis for the optimization of process parameters.