论文部分内容阅读
在机加工现场,大直径的精密测量一直是个很困难的问题。在500毫米以上直至数米的直径测量中,较多使用的量具是大型游标卡尺和大千分尺,这些量具不仅使用和保管不便,而且不易保证精度。本期封三所示为我所研制的新型大直径量具——精密π尺,该尺在大直径的现场精密测量中,不仅可弥补大型游标卡尺和千分尺的不足,甚至在很大程度上可以代替之。精密π尺仅由一条弹性钢带构成。钢带的两端分别刻有主、副尺。测量时,将精密π尺在垂直于轴线的截面上绕被测件一周,保持两公斤左右的拉
At the machining site, the large diameter of the precision measurement has always been a very difficult issue. In the diameter measurement of more than 500 millimeters up to several meters, the more used gauges are large vernier calipers and large micrometers, these gauges not only inconvenient to use and custody, and not easy to ensure accuracy. This issue of the closure of three shows that I developed a new type of large diameter gauge - precision π-scale, the foot in the large diameter of the site precision measurement, not only to make up for the lack of large vernier caliper and micrometer, or even to a large extent, you can replace It Precision π-foot only by a flexible steel band. The ends of the strip were engraved with the main, vice feet. Measurement, the precise π-ruler in the cross-section perpendicular to the axis of the test piece around a week to keep pulling about two kilograms