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在工厂车间里,经常会碰到尺寸大于200mm的精密样板的测量,而万能工具显微镜纵向测量长度最大只有200mm,由于样板的形状特殊(图1),用量块组也不好测量,我们采取了分段测量法,制作如图2所示的辅助样板,既操作方便,又能保证测量精度。制作辅助样板时,l等于被测样板的实际厚度l_实;90°的两个面(可留空刀槽)表面粗糙变为Ra0.2尺寸30±0.01mm的两测量面a、b表面粗糙度为Ra0.025;两测量面的平行度不得大于0.5μm;其尺寸在立式光学
In the factory floor, we often encounter the precision of the sample size greater than 200mm measurement, and universal tool microscope vertical length measurement of only 200mm, due to the special shape of the template (Figure 1), the amount of block group is not good measurement, we took Segmented measurement method, making the auxiliary model shown in Figure 2, both easy to operate, but also to ensure measurement accuracy. L is equal to the actual thickness of the test sample l_ real; two surfaces of 90 ° (can be left blank) surface roughness Ra0.2 size of 30 ± 0.01mm two measuring surface a, b surface Roughness of Ra0.025; parallel to the two measurement surfaces shall not be greater than 0.5μm; its size in vertical optics