We present the experimental and analytical investigation of the drilling forces for unidirectional carbon fiber reinforced plastics (CFRP) composites according to different machining parameters. In the analytical thrust force model, the chisel edge region is classified as an extrusion operation and the lip is considered as a orthogonal small-element cutting region. The chipping, pressing, and bouncing regions of the lip are incorporated into this thrust force model. In addition, the analytical model includes the thermophysical properties of CFRP by incorporating softening of the material due to drilling processes. Based on the developed model, the thrust force curve for all drilling stages is analyzed in time-domain considering both cutting conditions and material properties. Comparison between predictions and experiments was performed on three CFRP samples with different fiber volume fractions and sixteen cutting conditions. It was observed that the predicted forces can capture the trend of the experimental data with the relative small error. Time-domain analysis and fluctuation evaluation were also used to better understand the mechanism of thrust force during CFRP drilling.

我们根据不同的加工参数，对单向碳纤维增强塑料（CFRP）复合材料的钻削力进行了实验和分析研究。在分析推力模型中，凿子边缘区域被分类为挤压操作，而唇部被视为正交的小元素切割区域。嘴唇的崩裂，压迫和弹跳区域被合并到此推力模型中。此外，分析模型还包含了CFRP的热物理性质，其中包括由于钻孔过程而引起的材料软化。基于开发的模型，在考虑切削条件和材料特性的情况下，在时域内分析了所有钻孔阶段的推力曲线。对三种具有不同纤维体积分数和十六种切割条件的CFRP样品进行了预测和实验之间的比较。观察到预测力可以捕获相对较小误差的实验数据趋势。还使用时域分析和波动评估来更好地了解CFRP钻孔过程中的推力机制。