CFRP微孔钻削主轴速度参数实验优化及孔壁质量研究

Experimental Optimization of CFRP Microhole Drilling Speed Parameters and Study of Hole Wall Quality

为提高碳纤维增强复合材料微孔钻削的性能,以T300碳纤维/环氧树脂预浸料作为测试材料,开展了不同进给速度和刀具转速下钻削轴向力以及温度测试实验研究,并对钻削后形成的表面微观形貌进行了SEM表征。研究结果表明:进给速度设定在5 mm/min时可以获得较低钻头温度。提高主轴转速后,轴向力发生了减小,并在500 r/min转速下获得了7 N的最小轴向力。该研究对优化碳纤维增强复合材料微孔钻削参数优化以及表面质量具有很好的实际指导价值,易于推广应用。

In order to improve the performance of microhole drilling of carbon fiber reinforced composites,T300 carbon fiber/epoxy resin prepreg was used as test materials to test the axial force and temperature of drilling under different feed rates,and the surface microstructure formed after drilling was characterized by SEM.The results show that the lower bit temperature can be obtained when the feed speed is set at 5 mm/min.When the spindle speed is increased,the axial force decreases,and the minimum axial force of 7 N is obtained at 500 r/min.At a small feed speed,there is almost no burr.With the gradual increase of feed speed,the axial force of laminates can be improved,resulting in higher tool cutting quantity and rough surface,and the burr is generated.With the increase of feeding amount,the fiber layer on the upper side of the hole is more likely to peel off.The research has good practical guiding value for the optimization of microhole drilling parameters and surface quality of carbon fiber reinforced composites,and is easy to promote application.