本文对尺寸换算中的假废品公差带的确定方法,以及在假废品区内解出工序尺寸允许放宽的公差范围的实测法作了扼要介绍。并应用一般线性尺寸链图作简易图解。当封闭环设计尺寸精度高时,用传统解尺寸链的方法,必须大大提高其它组成环的加工精度,而用此法就避免了该弊病。 This article gives a brief introduction to the method of determining the tolerance zone of the size of the fake waste in the size conversion and the actual measurement method of the tolerance range that allows the process size to be relaxed within the fake waste zone. And use the general linear size chain diagram as a simple diagram. When the closed loop design dimensional accuracy is high, with the traditional solution of the size chain method, we must greatly improve the processing accuracy of the other components of the ring, and use this method to avoid the ills.