钻削参数对碳纤维复合材料孔加工质量的影响

Effects of Drilling Parameters on Hole Quality of Carbon Fiber Composite

本研究通过单因素试验方法,开展钻削碳纤维复合材料的试验研究。采用KISTALER公司9265B型测力仪测钻削轴向力,并采用撕裂因子评价孔形貌质量,对钻削碳纤维复合材料的过程进行分析,研究不同钻削参数对钻削碳纤维复合材料的轴向力和孔加工质量的影响。试验结果表明:随着进给量的增大,轴向力逐渐增大,孔退钻口撕裂因子呈现先减小再增大的趋势,孔进钻口撕裂因子则呈现逐步小幅增大的趋势。随着转速的增大,轴向力逐步小幅减小,孔退钻口撕裂因子随之减小。并且,进给量对轴向力和孔加工质量的影响远大于转速对轴向力和孔加工质量的影响。在相同条件下,孔进钻口的毛刺、撕裂等缺陷明显少于退钻口的缺陷。

Single factor test method was adopted for the drilling experiment of carbon fiber composite. The axial force of drilling was tested by Type 9265 B dynamometer from Kistaler Instrument Ltd.. The quality and morphologies of the holes were evaluated by tear factor. The effects of the drilling parameters on the processing quality and the axial force for drilling carbon fiber composite were investigated. The results indicate that with the increase of feed rate, the axial force increases,the tear factor of the hole outlet side firstly decreases and then increases, while the tear factor of the hole inlet side presents a trend of gradually increasing. With the increase of rotating speed, the axial force gradually decreases, and the tear factor of the hole outlet side decreases. Furthermore, the effects of feed rate on the axial force and hole machining quality are much greater than that of rotating speed. Under the same conditions, the burr, tear and other defects at the hole inlet side are significantly less than that at the hole outlet side.