《机床》1980年第11期刊载的“用长圆齿轮夹具加工凸轮”一文,曾介绍了加工图1凸轮的夹具,但未分析降低加工形状误差的方法。我们在实践中摸索出一套“直母线法”铣削凸轮,应用多年,经济效果显著。铣一个凸轮面只需40秒,光洁度比成形铣提高1～2级,工效提高一倍。本文从铣削凸轮 The article “Machining cams with oval gears”, Machine Tool, No. 11, 1980, introduced the process of machining the cam of Figure 1 but did not analyze the method to reduce the machining shape error. In practice, we worked out a set of “straight bus method” milling cam, the application for many years, the economic effect is remarkable. Milling a cam surface just 40 seconds, finish than the forming milling 1 to 2 levels, work efficiency doubled. This article from the milling cam