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由于目前测量不圆度的仪器稀缺,而且被测件的直径往往大于仪器的规格,所以研究如何用一种简便的测量仪器和方法来代替圆度仪进行测量,就具有一定的实用价值。一、三点测量法及其测量装置三点测量法可以用来测量不圆度误差。测量装置有鞍形和v形两种,示如图1和图2。为了测量不同直径的圆表面,图1b和图2的两支承脚应做成可调整式的,在被测表面上,测头与两支承脚构成两个θ角,必须满足θ=360°/n的条件,n可以是大于5的任意整数,但通常采用n=6,8,12,16,24等易于等分、易于计算的数。一般当直径较小时,可用
Due to the scarcity of the current instrument for measuring out-of-roundness and the diameter of the device under test is often larger than the size of the instrument, it is of practical value to study how to use a simple measuring instrument and method instead of a roundness meter to measure. A three-point measurement method and its measuring device Three-point measurement method can be used to measure the non-circularity error. Measuring device saddle and v-shaped two, shown in Figure 1 and Figure 2. In order to measure the different diameter of the circle surface, Figure 1b and Figure 2 of the two supporting feet should be made adjustable, the measured surface, the probe and the two supporting feet constitute two θ angle must meet θ = 360 ° / n, n may be any integer greater than 5, but n = 6, 8, 12, 16, 24 and the like are usually used, which are easy to divide and easy to calculate. Available when diameter is small