It is significance to examine the relationship of the materials and the geometry because there are numerous kinds of bits and materials. Six kinds of drills with different geometry parameters were designed to drill the 45 steel materials. The axial thrust, the torque, the shape of the chips, the machining efficiency, the precision and the surface roughness of the holes were investigated to obtain a group of ideal data, which provides a way to experiment and analyze for drill bits' optimal design.%钻头和被加工材料的种类繁多,通过实验来确定不同的被加工材料与钻头几何形状参数之间对应关系的规律.用自行设计的6种不同几何形状参数的钻头,对45号钢材料进行钻孔加工实验,对钻孔时的轴向力、扭矩、切屑形状和孔的加工精度、表面粗糙度等进行了分析研究,确定了一组针对45号钢材料钻孔较为理想的钻头几何形状参数,为钻头几何形状参数优化设计提供了实验和分析方法.
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