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在重型机械制造工业中,经常遇到几百毫米到几千毫米的大孔径测量问题,对于这一类部件的测量,通常简便的方法是用内径千分尺进行的,当孔径的精度要求较高时,由于内径千分尺本身精度及测量误差较大;测量又有一定局限性,往往无法保证对孔径准确度的要求。我们用夹具3把千分表1和千分尺调整棒2(或内径千分尺)连接成一组合量具(参看附图),先和测长机(或量块)直接比较后,再去测量大孔径,取得了良好效果。这种方法
In the heavy machinery manufacturing industry, often encountered hundreds of millimeters to thousands of millimeters of large aperture measurement problems, for this type of component measurement, usually simple method is to use an internal micrometer, when the accuracy of the aperture is high , Due to the inner diameter of the micrometer itself, the accuracy and measurement error greater; measurement has some limitations, often can not guarantee the accuracy of the aperture requirements. We use the fixture 3 dial indicator 1 and the micrometer adjustment rod 2 (or micrometer diameter) into a combination of measuring tools (see the figure), and then measure the length of the machine (or block) directly after the comparison, and then to measure the large aperture to obtain Good effect. This method