在检验工作中,经常遇到小孔的测量问题。有的检验员在检测时直接用分度值为0.02mm的三用游标卡尺的刀口形内量爪来测量检验φ10mm以下的小尺寸内孔,常感到孔越小,尺寸越难测准。但却忽视了正确的测量位置应使量具测头的移动方向与被测尺寸方向一致。本想使被测小孔尺寸接近真实数值,但实 In the inspection work, often encounter small hole measurement problems. Some inspectors in the test directly with the dividing value of 0.02mm three vernier caliper knife-shaped internal claw to measure the test φ10mm below the small size of the hole, often feel the hole smaller, the more difficult to measure the size. But neglected the correct measurement position should make the measuring probe movement direction and the measured size direction. This wanted to make the measured hole size close to the true value, but real