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一、上期问题答案长度计量 11.答:对于分度值为0.02mm的,用零级刀口尺;对于分度值为0.05和0.1mm的,用1级刀口尺,以光隙法检定。检定时,将刀口尺分别放在卡尺测量面的两对角线和纵向三个方位上,同时观察光隙,其大小与标准光隙比较确定。当三方位上出现的光隙均在中间或均在两边时,则以其中最大的光隙量为被测面的平面度,若三方位上出现的光隙有在中间,也有在两边时,则以最大的中间和两边光隙量之和为被测面的平面度。 12.答:用5等量块检定。对于测量上限至300mm的,其受检点不少于三点,对于测量上限大于300mm的,其受检点不少于六点。
A, the length of the answer to the question of the previous issue 11. A: For the division value of 0.02mm, with zero-level knife-edge; for the division value of 0.05 and 0.1mm, with a knife-edge, with the light gap test. When the test, the knife-edge rulers were placed on the measuring surface of the diagonal and the vertical three directions, while observing the optical gap, the size of the standard gap determined. When the optical gaps appearing in the three directions are both in the middle or on both sides, the largest amount of the optical gap is the flatness of the measured surface. If the optical gaps appearing in the three directions have the middle and the two sides, The sum of the maximum intermediate and the amount of optical gap between the two sides is the flatness of the test surface. A: Use 5 equal block test. For the upper limit of measurement to 300mm, the test point of not less than three points, for the measurement limit of more than 300mm, the test point of not less than six.