基于最大稳定度的深孔加工枪钻结构参数优化

Optimization of Structural Parameters of Gun Drill for Deep Hole Machining Based on Maximum Stability

深孔加工中刀具易发生偏斜,影响孔直线精度。针对某型发动机轴齿件上一小直径深孔加工,首先,建立枪钻导向条的稳定度方程;其次,以稳定度最大为目标,借助遗传算法,对枪钻的结构参数进行优化;最后,借助有限元方法和轴线偏斜预测模型验证优化效果。结果表明,优化后的枪钻,稳定度较优化前提高9.01%,变形量减小5.78%,预测轴线偏斜量0.0085 mm,满足孔直线精度要求。

In the deep hole machining,the deviation of the cutter easily affects the straight line accuracy of the hole.Aiming at the machining of a small diameter deep hole on a certain engine shaft gear,the stability equation of gun drill guide strip is established,and the maximum stability is taken as the objective function.With the help of genetic algorithm,the structural parameters of gun drill are optimized,and the optimization effect is verified by the finite element software.The results show that the stability of the optimized gun drill is increased by 9.01%,the deformation is reduced by 5.78%,and the predicted axis deflection is 0.0085 mm.