当前双圆弧齿轮齿形常规测量中,普遍采用齿根圆直径测量法。以公法线长度变动、分度圆弦齿厚和测量齿高、固定弦齿厚等的测量手段相配合,进行校验测量,不仅可控制工艺过程的切齿深度,同时可控制滚刀齿廓的正确性,保证齿形质量。详述了双圆弧齿轮凸齿成品齿形公法线长度测量计算的实用方法,并列出计算实例,可供从事机械制造的工人和技术人员参考。 In the current double-arc gear tooth shape routine measurement, the root circle diameter measurement method is generally adopted. In order to change the length of the common law, the graduation of the octave-chord tooth thickness and the measurement of tooth height, the thickness of the fixed chord and other means of measurement to carry out checks and measurements, not only can control the process of cutting gear depth, while control hob profile Correctness, to ensure tooth quality. The practical method of measuring and calculating the common normal length of tooth profile of double circular arc gear tooth is described in detail, and the calculation examples are listed, which can be used as a reference for workers and technicians engaged in machinery manufacturing.