Development of a function oriented computer aided tolerancing (FOCAT) system

Development of a function oriented computer aided tolerancing (FOCAT) system
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开发面向功能的计算机辅助公差(FOCAT)系统

DOI:
10.1177/2041297510393578
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发表时间:
2011-06
期刊:
Proceedings of the Institution of Mechanical Engineers - Part B: Journal of Engineering Manufacture
影响因子:
--
通讯作者:
Peng, Y.
Peng, Y.
中科院分区:
其他
文献类型:
--
作者:
Hu, J.;Peng, Y.

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机械零件的功能公差取决于其装配和制造功能。本文提出了一种功能公差设计与优化方法。根据ISO规范对功能表面进行分类。尺寸和几何公差类型是根据设计规则指定的。为了避免过约束和欠约束公差设计,提出了良好约束分析。建立了具有制造成本函数和装配叠加约束的公差优化模型。开发了计算机辅助公差(CAT)系统,为设计人员保证整个装配的功能公差提供了有效的工具。该系统用于三维(3D)装配的公差设计。
Functional tolerancing of a mechanical part depends on the assembly and manufacturing function. This paper presents an approach for functional tolerance design and optimization. Functional surfaces are classified according to ISO specification. Dimensional and geometric tolerance types are specified based on design rules. Well-constrained analysis is presented to avoid over- and under- constrained tolerance design. A tolerance values optimization model is established with manufacturing cost functions and assembly stackup constraints. A computer-aided tolerancing (CAT) system is developed to provide designer with an effective tool for ensuring the functional tolerancing of the entire assembly. The system is applied to perform a tolerance design for a three-dimensional (3D) assembly.
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