基于DOE的加工汽车碳纤维材料的新型钻头设计与优化

New Drill Bit Design and Optimization for Machining Automotive Carbon Fiber Materials Based on DOE

针对加工汽车碳纤维材料的钻头寿命短、加工质量差的问题,设计了一种新型钻头。通过DOE(design of experiment)试验方法,给出了钻头齿数、前角和后角等3个参数的全因子试验方案。利用MINITAB软件对试验数据进行回归分析,并利用响应优化获得最优设计参数。结果表明:齿数和后角对钻孔个数及钻头寿命影响不显著,前角对钻头寿命有显著影响,后角与前角的交互作用对钻头寿命也有显著影响。齿数、前角和后角对第一孔钻孔时间及钻孔速度有显著影响,齿数与后角的交互作用以及前角与后角的交互作用对钻孔速度有显著影响。通过试验测试验证优化后的最佳设计参数是有效合理的。

Aimed at the problems of short running life and bad machining quality of drill bits for machining carbon fiber materials for automobiles, a new type of drill bit was designed.Through the design of experiment(DOE)test method, a full factor test scheme of three parameters of the teeth quantity, the hook angle and the relief angle was given.Regression analysis of the test data was carried out by MINITAB software, and the optimal design parameters were obtained by the response optimization.The results show that the teeth quantity and the relief angle have no significant effect on the number of holes drilled and the drill bit running life, while the hook angle has a significant effect on the drill bit running life, and the interaction of the relief angle and the hook angle has a significant effect on the drill bit running life.The teeth quantity, hook angle and relief angle have a significant impact on the first drilling time and drill bit cutting speed, and the interactions of teeth quantity and relief angle, and hook angle and relief angle have a significant impact on the drill bit cutting speed.The optimal design parameters after optimization are verified to be effective and reasonable through test.