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在工厂和矿山,经常遇到卷成筒形材料的长度计算问题,如皮带、绞车上的钢丝绳、电缆和弹簧等,这些,可以通称为螺旋线的长度计算问题。它们当中,有的已有近似计算公式,但误差较大,本文推导了这几种螺旋线长度的近似计算和精确计算公式,并推算出了部分曲线长度计算的数表,供现场人员参考。一、筒形皮带长度的计算公式运输皮带常是筒形存放,往往需打开好几卷测量后,才能得到需要的长度。现介绍一公
In factories and mines, the problem of length calculation of rolled into cylindrical materials, such as straps, cables, springs, etc. on winches, is often encountered, which can be referred to as the length calculation of the helix. Some of them have approximate formulas, but the errors are quite large. In this paper, the approximate calculation and exact calculation formulas for the lengths of these spirals are deduced, and the numerical tables for the calculation of the length of some curves are deduced for the reference of on-site staff. First, the formula for the calculation of the length of the cylindrical belt Transport belt is often cylindrical storage, often need to open several measurements, in order to get the required length. Now introduce a male