考虑过程阻尼的圆弧刃铣削淬硬钢极限切深

Limit cutting depth of circular edge milling hardened steel with considering process damping

为了研究圆弧刃铣刀动态铣削过程中的过程阻尼情况,通过分析刀具结构的几何参数和工艺参数,对现有的模型进行整合优化,建立了圆弧刃铣刀过程阻尼的动态铣削数学模型.基于改进的数学模型,计算出后刀面侵入体积,并进行大量切削稳定极限实验,得到了高速下的极限切深.同时,应用Matlab和ANSYS软件解算得到铣削模态方程的过程阻尼系数,结合能量平衡方程,给出了淬硬钢耕犁力系数,进而预测极限切深.仿真结果表明,刀具后角和刃口半径对过程阻尼影响显著,预测极限切深与实验结果一致.

In order to study the process damping of circular edge milling cutters in dynamic milling, the integrated optimization for existing models was performed through analyzing the geometric and technological parameters for the tool structures, and the mathematical model for the dynamic milling of circular edge milling cutters with process damping was estabiished. Based on the improved mathematical model, the indentation volume of flank face was calculated. A large amount of cutting stable limit experiments were conducted, and the limit cutting depth under high speed condition was obtained. Simultaneously, the process damping coefficient of mining modal equation was solved by Matlab and ANSYS. In addition, the plough force coefficient of hardened steel was identified in combination with the energy balance equations, and the limit cutting depth can be predicted. The simulated results show that the relief angle and edge radius of the tool have a significant effect on the damping process, and the predicted limit cutting depth agrees with the experimental result.