An Efficient Approach to Interpreting Rigorous Tolerance Semantics for Complicated Tolerance Specification
An Efficient Approach to Interpreting Rigorous Tolerance Semantics for Complicated Tolerance Specification
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DOI：
10.1109/tase.2009.2012501
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发表时间：
2009-05
影响因子：
5.6
通讯作者：
Yusheng Liu;Shuming Gao;Yaolong Cao
中科院分区：
文献类型：
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作者：
Yusheng Liu;Shuming Gao;Yaolong Cao
公差对产品设计和制造的意义是显而易见的，毋庸置疑的。然而，计算机对公差语义的理解并不直观，这严重阻碍了CAD与CAM的集成。本文提出了一种统一解释复杂公差规范（CTS）严格公差语义的方法，即基于公差带（TZ）的公差重分类。首先，将公差重新划分为三类：不可动- tz （ITZ）公差、平移- tz （TTZ）公差和浮动- tz （FTZ）公差。其次，提出了一种基于cts沿自由度方向变化的严格公差语义的统一解释方法。为了提高严格公差语义解释实现的计算效率，提出了一种无需布尔交运算即可确定三维CAD系统TZ边界的新方法。最后，对该算法进行了实现，并给出了测试结果。
The significance of tolerance is obvious and undoubted for product design and manufacturing. However, it is not intuitionistic for the computer to understand the tolerance semantics, which heavily baffles the integration of CAD and CAM. In this paper, a uniform approach to interpreting the rigorous tolerance semantics for complicated tolerance specification (CTS) is proposed with the help of reclassification of tolerance based on tolerance zone (TZ). First, the tolerance is reclassified into three categories: Immovable-TZ (ITZ) tolerance, Translational-TZ (TTZ) tolerance and Floatable-TZ (FTZ) tolerance. Second, a uniform method of interpreting the rigorous tolerance semantics is presented based on the variation along degrees of freedom direction (VDOF) for CTSs. To improve the computational efficiency of implementation of interpreting rigorous tolerance semantics, a novel method is proposed to determine the TZ boundary without performing Boolean intersection operations in 3-D CAD systems. Finally, the algorithm is implemented and some test results are given.