设计师在确定机器零部件的配合尺寸和公差时,工艺师在制订工艺规程和保证装配精度时,都需要运用尺寸链原理,进行零件尺寸和公差的解算.常用的尺寸链计算方法在很多情况下,计算步骤烦琐,容易出错,应用不便。本文提出一种解算尺寸链的新方法——矢量法,并以实例说明其使用规则及图解解题步骤,介绍如下。 Designers in the determination of machine parts with the size and tolerance, the process designer in the formulation of technical regulations and ensure the assembly accuracy, the need to use the principle of size chain, part size and tolerance of the solution. Commonly used dimensional chain calculation method in many Case, the calculation steps cumbersome, error-prone, inconvenient to use. This paper presents a new method to solve the size chain - vector method, and an example to illustrate the rules of use and graphical solution steps, introduced below.