读了本刊1964年第6期“内定心花链孔的单键拉削”一文后,感到有两个不够完善的地方:(1)在转位过程中,分度角θ的制造误差累积地反映到每条键槽上;(2)带有毛刺的已加工键槽仅与定位肖的两个侧面接触,易使肖子磨损。在制造或修理少量有花键孔的齿轮和轴套类零件时,用单键拉刀逐齿拉削花键是经济的。对于精度要求高的零件, After reading the 6th Issue, 1964, “One-Key Broaching of Internal Shawl Chain Hole”, I felt that there were two imperfections: (1) In the indexing process, the manufacturing of the indexing angle θ Error is cumulatively reflected on each keyway. (2) Processed keyways with burrs are only in contact with both sides of the positioning shank, which can easily cause the shank to wear out. When manufacturing or repairing a small number of splined hole gear and sleeve parts, it is economical to single-spline spline with one-click broach. For the high precision parts,