薄壁件铣削加工刀具几何参数优化

针对汽车检具薄壁件铣削变形问题,通过改变铣刀的几何参数建立铣削单因素和三因素四水平的正交实验。利用有限元软件AdvantEdge和ABAQUS分别对铣削加工过程和加工残余应力引起的变形进行仿真,研究不同的刀具几何参数对工件变形的影响。采用田口法分析了刀具几何参数对加工变形的综合影响程度。结果表明:刀具后角对工件加工变形影响的最为显著,螺旋角次之,前角最不显著;获得AA5083铣削的铣刀刀具几何参数组合。通过实验对优化后的刀具几何参数的正确性进行验证,证明该方法是检具薄壁件加工中刀具几何参数优化选择的一种有效的方法。

Optimization of Milling Cutter Parameters for Machining Thin-walled Parts

This study aims to analyze the milling deformation of thin-walled parts of automotive fixture, single factor and three factor four level orthogonal experiment were established by changing the geometry of the milling cutter. Finite element software AdvantEdge and ABAQUS were used to simulate the deformation caused by milling process and residual stress respectively, and analyze the influence of different tool geometric parameters on workpiece deformation. Taguchi method was used to analyze the influence of geometric parameters on machining deformation. The results show that the tool back Angle has the most significant effect on the workpiece deformation, the helical Angle secondly and the front Angle thirdly, and obtain the combination of tool geometry parameter for AA5083 workpiece. The correctness of the optimized geometric parameters was verified by experiments, which proves that this method is an effective method for the optimization of tool geometric parameters in the machining of thin-walled parts.