Abstract
A tailored microwave thermal crack heating model to elaborate the process of curve trajectory cutting and the mechanism of action between microwave and materials is innovatively presented. The model of microwave thermal crack cutting Al2O3 ceramics is established, and the cutting process of microwave thermal crack curve trajectory is simulated. In the research of thermal crack cutting, the distribution of the temperature field and stress field are obtained by simulation calculation. The section quality, crack trajectory offset, and surface crack trajectory consistency of the machining results are characterized. As for the surface prefabricated trajectory, the crack propagation law of surface prefabricated trajectory different from that of section prefabricated crack is revealed by simulation analysis. The mechanism and effect of crack propagation control are simulated and experimentally studied by surface prefabricated trajectory and local cooling methods. The experimental results indicate that the local cooling method can improve the consistency of the upper and lower surface trajectories during crack growth. In summary, it is expected that this study could provide a theoretical reference regarding microwave cutting ceramics based on the thermal crack method and pave the way for microwave manufacturing in various industrial applications.
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