工艺尺寸链计算方法的研究

机械加工工艺制订过程中，工序尺寸的确定十分重要。当工序基准与设计基准重合时，可按工序余量和经济精度采用反推方法确定工序尺寸，当工序批准与设计不重合时，需用尺寸链原理计算工序尺寸。本文结合齿轮内孔的加工，详细介绍一种解算工艺尺寸链的新方法。

Research on the Method of Calculation of Process Dimension Chains

It is of great importance to determine the dimensions of working operation in making mechanical processing procedure. When process reference is coincident with the design reference, anti-derivation principle is used to determine process dimension according to the process allowance and economy precision. While process reference is not coincident with the design reference, it is needed to use the principle of dimension chain to calculate the dimensions of working operations. In this paper, combined with the machining of gear hole, a new method of analyzing and calculating the process dimension chains is discussed in details.