通过对刀齿啮合关系的研究，提出了磨前滚刀齿形优化设计方法，针对准高速机车牵引齿轮的应用和加工工艺特点，对准高速机车牵引齿轮磨前滚刀齿形进行了优化设计． Based on the research on the meshing relationship of cutter teeth, the tooth shape optimization design method of pre-grinding hob was put forward. According to the application of the traction gear of quasi-high-speed locomotive and the characteristics of processing technology, .