在机械修理和零件加工、修配过程中,经常遇到线性尺寸的公差换算和角度的公差换算等问题.这类公差的换算过程较繁杂,尤其角度公差的换算很不方便.为了能顺利地解决上述问题.这里介绍一种新的简便方法——全微分法.使用该方法即可使这类公差的换算过程得以简化.又能保证一定的计算精度.颇为实用.下面用两个算例来介绍全微分法. In the mechanical repair and parts processing, repair process, often encountered linear size tolerance conversion and angle tolerance conversion, etc. This type of tolerance conversion process more complicated, especially the angular tolerance conversion is very inconvenient.In order to successfully solve The above problem. Here introduces a new easy method - all differential method. Using this method can make this type of tolerance conversion process can be simplified, but also to ensure a certain degree of accuracy of the calculation is quite practical. The following two examples To introduce the whole differential method.