在铣刀齿数Z、每分钟转数n、每齿进给量S_2和每分钟走刀量S分四个变量中,只要知道其中三个数,就能确定另一个数。在每个标尺上找到已知数的点,用直线连接,便可得到未知参数的数值。例:假设已知 (1)选用12齿铣刀; (2)铣刀每分钟转数选为400转/分; In the milling cutter number Z, revolutions per minute n, feed per tooth S_2 and S minutes per minute divided by four variables, as long as you know the three numbers, you can determine the other number. Find a known number of points on each ruler, with a straight line, you can get the value of unknown parameters. Example: Assuming that (1) the choice of 12 tooth cutter; (2) milling cutter revolutions per minute selected 400 rev / min;