【作者】 石仁庆；

【导师】 王丽英；

【作者基本信息】 北京化工大学 ， 机械设计及理论， 2007， 硕士

【摘要】 近年来，随着计算机信息技术的迅猛发展，现代机械制造业依托计算机信息技术，取得了快速的进步。在这种背景下，计算机集成制造系统(CMIS)、计算机辅助设计与制造技术(CAD／CAM)的研究与应用取得了重大的突破和引人注目的成就，但是，计算机辅助公差设计技术(Computer Aided Tolerance，简称CAT)作为CAD／CAM集成的关键技术之一，其发展远远落后于CAD／CAM的发展。针对CAT技术发展的现状，本文在CAT技术的研究与应用方面主要做了如下工作：1、介绍了计算机辅助公差设计研究的历史与现状；综述了国内外计算机辅助公差设计研究方面的阶段性成果；提出本文的主要研究内容和总体构架。2、介绍尺寸链的相关基础知识；提出尺寸链数学模型，分析了以图论为基础的数学模型的建立；分析了以深度优先搜索法进行尺寸链自动生成的搜索过程。3、传统公差分析方法是进行公差分析的基础，本文除对极值法和概率法进行分析外，还讨论了蒙特卡罗方法和数论方法，给出了运用数论方法进行公差分析的步骤，并对两种方法的统计特性进行比较研究。4、介绍了运用传统的极值法和概率法进行公差综合的方法，基于零件公差与制造成本之间的关系，建立了公差成本模型，分析了最小成本法和线型规划法进行公差分配。5、以前述计算机辅助公差设计关键技术理论研究为基础，综合公差与配合的查询及典型零件的公差设计，开发计算机辅助公差设计原型系统。更多还原

【Abstract】 In recent years, along with the computer information technology swift and violent development, the modern mechanical manufacturing industry depended on the computer information technology, has made fast progress. Under this kind of background, significant breakthroughs and noticeable achievements have been obtained in the research and application of computer integrated manufacturing system (CMIS) and computer aided design and manufacturing (CAD/CAM). However, Computer Aided Tolerance (CAT) lags far behind CMIS and CAD/CAM. In view of the present situation in CAT technological development, the main work which has been done in this paper is as follows:1、Introduce the history and present situation of research in Computer Aided Tolerance; Summarize the domestic and foreign gradual achievement in the research of CAT; Propose the main research contents and the skeleton of this paper.2、Introduce the elementary knowledge related to dimension chain; Propose mathematical model of dimension chain, and analyze the process to build mathematical model; Analyze the search process to generate dimension chain using deep first search method.3、Traditional methods in tolerance analysis including extreme value method and probability method are introduced. Besides Monte Carlo method and number theoretic method are discussed, and compared with their statistical characteristics. The approach using number theoretical method is describled.4、Study Tolerance-Cost Model which is based on the relationship between tolerance and manufacturing cost. Minmum cost method and linear programming method are built to allocate tolerance, which are based on Tolerance-Cost model. 5、In the end, the prototype system is given out, which is developed on the theories studied before with VC6.0 and Access software.更多还原