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1.基节的测算:基节是基圆圆周上每一个齿所占有的弧长。图4是用卡尺测量基节和基圆齿厚的示意图。测量分两次进行,第2次测量时卡尺包含齿数等于第1次测量时卡尺包含齿数加1。这样分两次测量出两个数值L和L′。设:n=第1次测量时卡尺包含的
1. Calculation of the base section: The base section is the arc length occupied by each tooth on the base circle circumference. Figure 4 is a caliper to measure the base section and the base circle tooth thickness diagram. Measurements were made in two runs. The caliper included in the second measurement was equal to the number of teeth included in the caliper at the first measurement plus one. In this way two values L and L ’are measured twice. Set: n = caliper included in the first measurement