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在工厂生产中,一般都采用千分表来检验工件的径向跳动。但是,如果测量时千分表测杆轴线未通过工件回转中心,那么所测得拟直就会产生误差。下面分析一下不同情况下误差值的大小。如图所示,我们假设被测零件的截面是一理想的偏心圆,最大半径是OA,最小半径是OB,那么该工件的径向跳动应该是OA-0B,但实际检侧的数值应该是表头接触最高点时的示值减去表头接触最低点时的示值的差,由
In the factory production, the dial gauge is usually used to test the radial runout of the workpiece. However, if the axis of the dial gauge does not pass through the center of rotation of the workpiece during measurement, the measured alignment will produce an error. The following analysis of the size of the error under different circumstances. As shown, we assume that the cross section of the part under test is an ideal eccentric circle, the maximum radius is OA, the minimum radius is OB, then the radial runout of the workpiece should be OA-0B, but the actual value of the side should be The difference between the indication at the highest point of contact minus the indication at the lowest point of the contact is given by