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测量上限大于150毫米的千分尺示值误差,可用检定规程中图示的检具检定。但此种检具调整困难,测量费时。我们改进了大千分尺示值误差检具,经两年多使用证明,此检具调整迅速,测量结果稳定,大大提高了测量速度。如图,将一把旧0—25毫米的千分尺1截去固定测头一端,将其用两个沉头螺钉固定在可沿央持框4回转的连接架3上。通过夹紧螺钉6,将检具夹持在被检大千分尺靠近活动测杆一端的尺架上。先使被检千分尺对正零位,再旋转检具上的千分尺
The error of indication of the micrometer with an upper limit of more than 150 mm can be checked with the gage illustrated in the verification protocol. However, such gage adjustment difficult, time-consuming measurement. We improved the error indication of the large micrometer indication, after two years of use proved that the fixture adjusted quickly, the measurement results are stable, greatly improving the measurement speed. As shown in the figure, place an old 0-25 mm micrometer 1 at one end of the fixed probe and attach it to the connector 3 that can be rotated along the central frame 4 with two countersunk screws. By clamping screws 6, the test fixture is clamped on the test micrometer ruler near the end of the active rod. First check the micrometer alignment zero, and then rotate the seizure of the micrometer