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用窄面平尺.检验各种零件的不平度、不直度,尤其是检验机床工作台面的不平度,在机床成品精度检验中,得到广泛的应用。据某些资料介绍,采用平尺和量块,在测量时,一般将垫铁放于2/9·L 处(L 是平尺的全长,如图1所示),在平尺与工作台面之间塞量块,测出工作台的不平度。由于这种测量方法是用平面上最大不直度来表示平面的不平度,而工作台面有一定的宽度,实际上要在台面上不同的方向(至少四个方向)检验它,每个方向还要经过下列计算,才能得出测量结果:△=△_(max)-△_1-(△_2-△_1/L)l,式中△——台面实际最大不平度;△_1——两端塞入的较小值;△_2——两端塞入的较大值;△_(max)——塞入的最大值;
With narrow face flat ruler.Inspection of various parts of the unevenness, not straightness, especially the inspection machine workbench unevenness, precision testing of machine tools, has been widely used. According to some information, the use of flat ruler and measuring block, the measurement is generally placed on the horn 2/9 · L (L is the full length of the flat ruler, as shown in Figure 1) Table between the block plug, measured bench unevenness. Since this method of measurement uses the largest non-straightness in the plane to represent the unevenness of the plane, and the work surface to a certain extent, it is in fact necessary to examine it in different directions (at least four directions) on the work surface, in each direction To get through the following calculations in order to obtain the measurement results: △ = △ _ (max) - △ _1- (△ _2- △ _1 / L) l, where △ - maximum real rough surface roughness; △ _1-- both ends △ _2 - the larger value of both ends of the plug in; △ _ (max) - the maximum value of plug in;