检验座标镗床、座标磨床和分度转台的工作精度,一般是在专门的试样上镗出几个孔,顺次测量这些孔的中心距。 古比雪夫座标镗床厂研究出一种测量中心距的方法。此法是利用按标准试样调整好的指示仪,测量两孔左边和右边同侧母线间距离和相应名义距离的差△L1和△L2,而中心距的误差 Inspection jig boring machine, coordinate grinder and indexing rotary table accuracy, usually boring a few holes in a special sample, followed by measuring the center distance of these holes. The Kuibishev coordinate boring mill has developed a method of measuring the center distance. This method is the use of standard sample adjusted indicator, measuring the left and right sides of the hole with the same side of the bus and the corresponding distance between the nominal distance of the difference △ L1 and △ L2, and the center of the error