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介绍了石油钻井用三牙轮钻头的结构特点和工作原理。分析了牙轮钻头目前采用的加工方法和工艺特点，着重分析了三牙轮钻头主要零件牙轮的内孔、二止推面采用常规磨削加工工艺方法存在的问题；并从加工机床、刀具材料的性能及选择、切削用量的选择、切削液的性能以及安装定位等方面对采用以车代磨加工工艺方法进行了分析研究。现场统计数据资料表明，采用以车代磨加工工艺方法生产的牙轮钻头，不仅降低了加工成本，而且使钻头的使用寿命有大幅度提高，进一步说明采用以车代磨的加工工艺方法的合理性和实用价值。
The structural features and working principle of tri-cone bit for oil drilling are introduced. The current processing methods and technological characteristics of roller cone bits are analyzed. The problems of the conventional grinding process of the inner holes of the main parts of the roller cone bits and the conventional grinding process of the two thrust surfaces are analyzed. The machining tools, Material performance and selection, the choice of cutting dosage, the performance of cutting fluid and the installation of positioning and other aspects of the use of the car on behalf of grinding process technology were analyzed. Field statistics show that the use of grinding process to replace the roller bit production process, not only reduces the processing costs, but also greatly enhance the service life of the drill bit, and further illustrates the use of the vehicle on behalf of the grinding process is reasonable Sexual and practical value.