变截面涡旋盘外圈薄壁齿铣削参数优化及实验研究

Parameter Optimization and Experimental Study of Milling Circumferential Thin-walled Tooth of Vortex Disk

针对变截面涡旋盘壁厚变化不均匀,涡旋齿薄壁部位加工表面质量难以控制等加工难点,利用DEFORM软件的铣削模块,建立外圈薄壁齿铣削有限元模型,模拟涡旋齿薄壁部位的三维铣削过程。通过变化模型的铣削速度和铣削深度观察仿真结果中刀具所受到的铣削力的波动情况和其数值大小的变化,对铣削速度和铣削深度进行优化,并用其优化后的铣削参数对实际零件进行加工验证,结果表明:有限元铣削仿真能够非常有效地预测外圈薄壁齿的瞬态加工情况,仿真结果中优化后的铣削速度和铣削深度的铣削力波动明显低于未优化的铣削力波动,实验证明优化后的铣削参数能够有效的改善加工品质。

In view of the difficulties,such as uneven wall thickness variation,high machining accuracy and difficult surface quality control in the thin-walled parts of vortex teeth,a finite element model of outer ring thin-walled tooth milling is established by using milling module of DEFORM software.The three-dimensional milling process of thin-walled vortex teeth is simulated.The milling speed and depth are optimized by observing the fluctuation of the milling force and the change of the value of the cutting tool in the simulation results of the milling speed and depth of the model.The optimized milling parameters are used to verify the machining of the actual parts.The result shows that the finite element milling simulation can very effectively predict the transient machining condition of the outer ring thin-walled teeth.The milling force fluctuation of the optimized milling speed and milling depth in the simulation results is significantly lower than the unoptimized milling force fluctuation.Optimized milling parameters can effectively improve processing quality.