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采用金刚石涂层854钻头进行了钻削碳纤维增强树脂基复合材料T300和T800的试验,使用测力仪与超景深三维显微系统对钻削过程中的钻削力以及孔出、入口缺陷进行了测试与观察。分析了钻削力随时间的变化规律,切削用量对切削力和钻孔质量的影响。实验结果表明:在相同进给速度下,随转速增加,轴向力呈减小的趋势;在同一转速下,轴向力随着进给速度增加呈逐渐增大的趋势,已加工孔的入口质量比出口质量好。在相同参数下,T300比T800的轴向力要小,T300的平均力约为T800的2/3左右。T800的撕裂长度约为T300的1/3左右。
Diamond-coated 854 drill was used to drill carbon fiber-reinforced resin-based composites T300 and T800. The dynamometer and the depth of field 3D micro-system were used to measure the drilling force, hole exit and entrance defects during drilling Test and observation. The variation of drilling force with time and the influence of cutting amount on cutting force and drilling quality were analyzed. The experimental results show that at the same feed rate, the axial force tends to decrease with the increase of the rotating speed. At the same rotating speed, the axial force tends to increase with the feed rate. The entrance of the machined hole Quality is better than export. Under the same parameters, the axial force of T300 is smaller than that of T800, and the average force of T300 is about 2/3 of T800. T800 tear length of about T300 1/3 or so.