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在位移度与尺寸公差的混合标注中,无基准标注的位移度误差的处理方法,要比有基准的复杂得多。当孔数较少时,也有一些方法可以借鉴,而当孔数较多或多孔组的情况下,就难以准确地确定其误差值。 本文企图用“图解计算法”来确定多孔组无基准标注的位移度误差。这种方法是在测量中按两孔找正,测量后再利用简易的图解计算进行二次找正的一种数据处理方法。现简述如下:
In the mixed dimensioning of displacement and dimensional tolerance, the error of the displacement without reference mark is much more complicated than the reference. When the number of holes is small, some methods can be used for reference. However, when the number of holes is large or the number of holes is large, it is difficult to accurately determine the error value. In this paper, we attempt to use the “graphic method” to determine the displacement error of a non-fiducial mark in the porous group. This method is to press the two holes in the survey to find, measure and then use a simple graphical calculation of a second data processing method. Are summarized as follows: