Modeling Research on Transient Temperature Field of Rake Face on End Mills Considering Time-varying Heat Intensity and Time-varying Distribution Ratio

High-speed peripheral milling is a kind of mechanical processing method with wide processing range and high production efficiency. There will be a lot of milling heat during the milling process, especially when the workpiece with low thermal conductivity is processed, the periodic change of milling temperature will accelerate tool wear, and then reduce the workpiece surface processing quality. Due to the lack of research on transient temperature field of rake face of end mills in the research of peripheral milling at present, against the context, a modeling method of transient temperature field of rake face of end mills is proposed based on "moving heat source method" considering the time-varying heat intensity, time-varying heat distribution ratio and rake angle in the second deformation zone. Firstly, transient temperature field of rake face of milling cutter under the influence of the first deformation zone heat source is developed. Then, transient temperature field of rake face of milling cutter under the influence of the second deformation zone heat source is developed. Finally, the temperature rise model superposition calculation is carried out, and then the prediction model of transient temperature field of rake face is modeled. The accuracy of the model is verified by simulation and experiments results, theoretical support be provided for further research on the wear resistance design of rake face of milling cutter.
QC 20200918