机械加工车间在使用外径千分尺时,一般用柱形校正棒对零位,由于柱体细长,加之又受手的温度影响,冷、热、涨、缩变化较大,所以不易校对准确,而且容易丢失或损坏不易管理。针对此情况,我们计量室急生产之所急,想办法自制成功千分尺零位梯形校验器,经几年来实际使用效果良好,既准确又方便,便于保管、便于携带,而且使用寿命长。现将改制情况简介如下: Mechanical workshop in the use of micrometer diameter, the general bar correction rod zero, because the cylinder slender, coupled with the hand temperature, cold, heat, up, shrink larger, so not easy to proofread accurate, And easy to lose or damage is not easy to manage. In response to this situation, we measure emergency room urgently, think of a way to make a successful micrometer zero trapezoidal calibrator, after several years of practical use of good results, both accurate and convenient, easy to store, easy to carry, and long service life. The restructuring is now briefed as follows: