碳纤维复合材料钻削仿真及轴向力预测

Simulation and Prediction of Thrust Force for Drilling Process of CFRP

为了研究钻削加工中切削用量和刀具几何参数对钻削质量的影响,利用ABAQUS软件模拟研究了碳纤维复合材料的钻削过程。以主轴转速、进给量、钻头顶角为设计变量,基于响应曲面法构建了钻削轴向力预测模型,并分析了各变量对轴向力的影响。结果表明:轴向力随主轴转速的增加而降低,随进给量和顶角的增加而增加;对轴向力大小的影响顺序依次为:进给量、转速、顶角。预测模型具有较高的置信度,在实际加工中宜采用较高的主轴转速、较小的进给量和钻头顶角,以降低碳纤维复合材料钻削轴向力,改善钻孔质量。

To study the influence of the cutting parameters and geometric parameters of the cutting tool on the drilling quality,simulation of drilling Carbon Fiber Reinforced Plastic(CFRP)composites was conducted by using software ABAQUS.A model for predicting the thrust force in drilling was established based on the Response Surface Methodology(RSM),in which the spindle speed,feed rate,and point angle were considered as the design variables.The influence of those variables on the thrust force was analyzed as well.The results show that the thrust force decreases with the increasing of spindle speed,and increases with the increasing of feed rate and point angle.The order of influencing significance on the thrust force is the feed rate,spindle speed,and point angle.The prediction model has high confidence.It is recommended to use higher spindle speed,smaller feed and point angle in drilling,in order to reduce the thrust force and improve the drilling quality of CFRP composites.