关键词: 角盒类零件, 典型特征匹配, 分类编码, 特征识别, 知识重用

Abstract: To meet the classification and coding recognition requirements of corner box parts process knowledge reuse,a part classification and coding recognition method based on facet feature matching was proposed.The shape and machining characteristics of the whole part were analyzed and defined,and the principle of classification and coding based on the machining characteristics was established.The 0-1 feature matrix of the part surface depth was obtained by using the depth difference of the cavity wall edge surface set,which was decomposed and extracted to determine the basic type of the part.The geometrical topological matrix of the surface set and the edge-ring relation matrix of the characteristic surface were designed.To reduce the matching range of typical features and improve the recognition efficiency,the typical features were selected according to the basic types of parts and the attributes of face sets.Some examples were given to illustrate the extraction of typical feature base and its mapping matching with coding type,which verified the effectiveness and feasibility of the classification coding recognition algorithm.

Key words: corner box parts, typical matching, classification and coding, feature recognition, knowledge reuse