Based On The Dimensional Accuracy Of The Computer-aided Design

Dimension tolerance design is one of the important parts of mechanical precision design,which has important influence to improve product performance and cost reduction. Computer aided dimension tolerance design has been more and more extensive attention at home and abroad, becoming the focus of research and engineering practice technology.With the reasonable choice of dimension tolerance design, which will limit with deep grasp limits and cooperate with national standards for products, and the technical requirements, working conditions and manufacturing conditions for comprehensive analysis, but also through production practice and scientific experiments to accumulate experience, such ability reasonable design size accuracy.Comprehensive analysis product design requirements, manufacturing assembly requirements, manufacturing costs, application of many factors such as tolerance optimization theory, and computer aided assembly and quality inspection, tolerance optimization design process to achieve the optimal size precision design.Meanwhile, AutoCAD software can realize manual inquiry, standard query and tolerance tagging etc function, but use complex, set trouble, lack of a simple and convenient dimension tolerance design software. In order to facilitate the design personnel, improve the design efficiency, this paper introduces a new software of dimension tolerance design.It overcomes the mechanical design personnel repeated look-up tables and repeatedly to set parameters insufficiency,which has time-saving, efficient characteristics and mechanical design intelligent. Also it improves the efficiency of drawing and design, and enhances the AutoCAD application functions,also has certain practical value.