制造约束规则的表达方法研究

基于特征的零件模型建立特征、制造方法和制造设备之间的关系，根据这种关系和制造设备的加工能力，建立制造约束，它包括对特征和特征间关系的约束．并利用Ｐｒｏｌｏｇ语言，给出了制造约束规则的表达方式

On the Representation of Manufacturing Constraints by Rules

On the basis of a feature based part model, the relationship between the features, manufacturing process and manufacturing equipment is established. With this relationship and the capability of the manufacturing equipment, the manufacturing constraints including those on individual features and inter feature relations are established. To facilitate the representation and handling of the constraints by rules, individual features and feature combinations are both treated as sub structures of parts. Each constraint rule is composed of two portions. The first is used to match the corresponding sub structure, or, in effect, the sub structure is extracted from the part information. The second is the actual constraint to be imposed on the sub structure. During evaluation, if the first portion of a constraint rule is matched with some sub structure on part information, then the sub structure should satisfy the second portion, the actual constraint, of the constraint rule. The use of rules has simplified the representation and handling of manufacturing constraints.