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运用一种新的数学模型来表示和分配应用在飞行器中的孔销连接结构中的几何公差。此模型的核心是一种符合ASME/ISO标准的公差地图(T-Map),它是一个假设的欧几里得点空间,可以表示装配件中的目标要素源于不同几何公差所允许的任何误差可能性。详细介绍了不同几何公差标注下T-Map的建立过程,进一步讨论了它们对于基准顺序的敏感性,同时又比较了在装配中复杂零件和简单零件的T-Map的建立过程的不同点。详细阐述了根据不同部件之间的几何关系对不同部件的T-Map进行叠加以得到目标要素的累积T-Map的方法,然后使用极值公差分析,通过最小化功能T-Map和累积T-Map之间的空间,进行几何公差分配优化。
A new mathematical model is used to represent and distribute the geometrical tolerances in pin-hole connection structures used in aircraft. At the heart of this model is an ASME / ISO-compliant tolerance map (T-Map), which is a hypothetical Euclidean point space that indicates that the target features in the assembly originate from any error allowed by different geometric tolerances possibility. The establishment process of T-Map under different geometrical tolerances is introduced in detail. Their sensitivity to benchmark order is further discussed. At the same time, the differences of T-Map establishment between complex parts and simple parts in assembly are compared. This paper elaborates on how to accumulate the T-Map of different components based on the geometric relations between different components to get the cumulative T-Map of the target features, and then uses the extreme value tolerance analysis, through minimizing the functional T-Map and accumulating T- Map space between the geometric tolerance optimization.