一、平面度的检验在“形状和位置误差测量”标准中指出:平面度误差是被测实际表面对平面的偏离量。其误差以“包容实际表面的两平行平面最小区域宽度“f”来确定(见图55)。用这种方法确定的误差,是唯一的,也是最小的。由于机床工作台面尺寸较大,倘若再找包容面、求出符合定义的误差,那就更麻烦了。因此,国外一些机床精度标准(如ISO、西德标准等)规定,以表面上相距最远的 First, the flatness test In the “shape and position error measurement” standard states: Flatness error is the actual surface of the measured deviation from the plane. The error is determined by “the minimum area width” f "of two parallel planes that contains the actual surface (see Figure 55). The errors determined by this method are the only and smallest ones. Due to the large size of the machine table, To find the tolerance, find the error in line with the definition, it is even more troublesome.Therefore, some foreign machine tool accuracy standards (such as ISO, West Germany standards, etc.) provides that the surface furthest from