冷加工58年5期刊载的“加工不等螺距蜗杆的装置”一文(下称原文),其中所介绍的装置,结构巧妙,制造简便,很有创造性。但在内容上还存在着一些错误和漏洞,有必要加以补充和更正。现提出如下: (一)原文计算锥形轮大端和小端的公式是:锥形轮小端螺纹的平均直径(d平均)/锥形轮大端螺纹的平均直径(D平均)=工件的最小螺距(S_1)/工件的最大螺距(S_2) 这个公式有错误,应改为: Cold Working 58, Issue 5, “Processes ranging from pitch helical worm” article (hereinafter referred to as the original), which describes the device, clever structure, easy to manufacture, very creative. However, there are still some mistakes and loopholes in the content that need to be supplemented and corrected. Are as follows: (a) The original formula for calculating the large end and small end of the conical wheel is: Average diameter of the small end thread of the conical wheel (d average) / Average diameter of the large end thread of the conical wheel (D average) = The minimum pitch (S_1) / workpiece maximum pitch (S_2) This formula is wrong, should be changed to: