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一、测量与计算方法在显微镜上以影像法,用弓高弦长确定被测件的半径或直径时(不完整半圆形状),其计算式为式中 r、D——被测件半径和直径;C——当测量高度为 h 时的弦长。在实际工作中,对于一些周期性、重复性的工件如:数量较多的同一产品的检验,生产过程中的序间检验与调试,半径规检验等等,则采用弦差值来确定实际半径或直径则要方便,快速得多。
First, the measurement and calculation method In the microscope to the image method, the bow with a high chord length to determine the measured radius or diameter of the specimen (incomplete semicircle shape), the formula is where r, D - the measured radius and Diameter; C - chord length when measuring height h. In actual work, for some periodic and repetitive workpieces, such as the inspection of the same product in a large quantity, the inter-sequence inspection and adjustment in the production process, the radiometric inspection, etc., the difference of the chords is used to determine the actual radius Or diameter should be convenient, much faster.