详细讨论了各种因素对PDC钻头切削齿的两个工作角(前倾角及侧倾角)的大小和方向的影响-根据PDC钻头的结构特点,在设计切削齿工作角时,将钻头分为四个区域,分别论述了各个区域切削齿工作角的设计方法和原则.研究认为,控制钻头各部位切削齿结构参数的变化,可以设计出满足要求的切削齿工作角. The influence of various factors on the two working angles (rake angle and roll angle) of PDC bits is discussed in detail. According to the structural characteristics of PDC bits, when designing the working angle of cutting teeth, the bits are divided into four The paper discusses the design method and principle of working angle of cutting teeth in each region respectively.The research shows that the working angle of cutting teeth that can meet the requirements can be designed by controlling the change of cutting tooth structure parameters in various parts of drill bit.