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三爪千分尺是一种直接测量内孔的精密量具。该尺在经过长期使用后,会出现测爪不复位的现象。经分析,造成测爪不复位的主要原因有以下两种: 第一,使用三爪千分尺后,未能及时扭退测杆,退回测爪。由于弹簧长时间处于涨紧状态而降低弹性,只要稍有污物进入测爪与孔壁之间,便无力拉回测爪。第二,当测爪处于伸出尺身状态时,使用者或他人不慎把量具磕碰出毛刺凹痕,使测爪卡在孔中不能顺利滑动复位。第一种情况以小尺寸三爪千分尺较多见。修理方法是:先将测杆扭退到零位,用专用搬
Three claw micrometer is a direct measurement of the precise measurement of the hole. After the long-term use of the ruler, there will be no claw test reset phenomenon. The analysis, resulting in no resetting of the claw for the following two main reasons: First, the use of three claw micrometer, failed to reverse the rod in time to return the claws. As the spring tension in the state for a long time to reduce the elasticity, as long as a little dirt into the claw and the hole between the wall, it will be unable to pull back the claws. Second, when the test claw is extended in the state of the ruler, the user or others inadvertently bump the gauge bump dent, so that the test pincer can not slide and reset smoothly in the hole. The first case is more common with small three-jaw micrometers. Repair method is: first rod twist back to zero, with a special move