编制零件机械加工工艺规程的过程中,当遇到需要进行电镀的零件时,我们必须考虑零件的镀层厚度对镀后尺寸的影响(对于非配合尺寸,其影响可忽略不计)。换句话说,就是在机械加工时,必须正确确定电镀表面的镀前工艺尺寸。为此,需要根据图纸给出的尺寸和镀层厚度,进行一些必要的计算。 In the machining of parts, we have to consider the influence of the thickness of the part on the size of the plating (negligible for non-mating dimensions) in the case of parts that require electroplating. In other words, when machining, the size of the pre-plating process on the plating surface must be correctly determined. To do this, we need to make some necessary calculations based on the size and plating thickness given in the drawings.