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Quick GPS: A new CAT system for single-part tolerancing

机译:快速GPS:用于零件公差的新型CAT系统

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This paper depicts a new CAT (Computer Aided Tolerancing) system called Quick GPS (Geometrical Product Specification), for assisting the designer when specifying the functional tolerances of a single part included in a mechanism, without any required complex function analysis. The mechanism assembly is first described through a positioning table formalism. In order to create datum reference frames and to respect assembly requirements, an ISO based 3D tolerancing scheme is then proposed, thanks to a set of rules based on geometric patterns and TTRS (Technologically and Topologically Related Surfaces). Since it remains impossible to determine tolerance chains automatically, the designer must impose links between the frames. The CAT system that we developed here proposes ISO based tolerance specifications to help ensure compliance with the designer's intentions, saving on time and eliminating errors. This paper will detail both the set of tolerancing rules and the designer's approach. The Quick GPS system has been developed in a CATIA V5 environment using CATIA VBA and CATIA CAA procedures.
机译:本文描述了一种称为Quick GPS(几何产品规范)的新型CAT(计算机辅助公差)系统,该系统可帮助设计人员指定机构中单个零件的功能公差,而无需进行任何复杂的功能分析。首先通过定位表形式描述机械装置。为了创建基准参考系并遵守装配要求,由于基于几何图案和TTRS(技术和拓扑相关曲面)的一组规则,因此提出了基于ISO的3D公差方案。由于仍然不可能自动确定公差链,因此设计人员必须在框架之间施加链接。我们在此开发的CAT系统提出了基于ISO的公差规范,以帮助确保符合设计者的意图,从而节省了时间并消除了错误。本文将详细介绍公差规则集和设计人员的方法。快速GPS系统是使用CATIA VBA和CATIA CAA程序在CATIA V5环境中开发的。

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