模糊集合运算在冲压件工艺特征判断中的运用

Applying fuzzy sets to the recognition of stamping features

针对目前的冲压工艺智能设计和特征识别的需要,提出了一种采用模糊集合运算的方法来进行冲压件工艺特征的判断。该方法适用于判断由多个因素的布尔关系决定的特征。运用本方法,首先将各个因素模糊化;然后选择合适的布尔运算和算子来进行模糊集合布尔运算;最后选择合适的λ值进行λ截集,来实现工艺特征的判断。以悬臂和窄槽的判断为例,介绍了具体的计算过程。和以往的方法相比,该方法更加贴合工程实际,计算方便,灵活。

A fuzzy sets approach for the recognition of stamping features is introduced in this paper to satisfy the need of feature recognition in the intelligent die design systems. This method is applicable for recognizing the features which can be determined by the Boolean operations of some factors. The first step of this approach is to blur all the factors. Secondly, the appropriate fuzzy set operators of intersection and union are selected to implement the specific aggregation of fuzzy sets. Finally, the features can be recognized by creating a λ set of the aggregation. The details of calculation are demonstrated by an example of recognizing the cantilevers and slots. Compared with the traditional methods, this approach agrees better with the practical situation of engineering and is more convenient for calculation.