工艺尺寸的网络图分析和整体解算

本文以凸缘套类零件加工为例,阐述了工艺尺寸的网络图分析、解算的全过程。说明尺寸网络图不仅简洁明了地表示出机械加工过程中全部的尺寸联系,而且是该几何结构的数学模型。它内涵着一个网络尺寸链矩阵,充分表明了全部尺寸联系的整体性特征。运用整体解算全部工艺尺寸,比传统的尺寸链计算法更完善,图解计算更简便。借助它可以方便地进行工艺方案的拟定与工艺方案的选优。

NETWORK FIGURE ANALYSIS AND OVERALL CALCULATION OF THE TECHNOLOGICAL SIZE

The paper takes the processing of spare parts of the flange sleeves as an example to illustrate the network figure analysis of the technological size and the whole course of its calculation. The network figure of size is suggested not only to show briefly and clearly the entire size relations in the course of machine-processing but also to be the mathematical model of the geometric structure. It implies a recurrent size matrix of the network, which fully exposes the characteristics as a whole of the entire size relations. To make an overall calculation of the entire technological size is more perfect and convenient than to do it in the traditional method of recurrent size calculation. Illustration is much more concise. It helps to draft technological schemes with ease and to pick out the best.