关键词: 特征识别, 交叉特征, 扩展属性面邻接矩阵, 加工余量, 拔模斜度, 铸件毛坯

Abstract: For the problem of recognition unsatisfactory of intersected features,the member value of extended attributed adjacency matrix was indexed and changed,the features with common surface were merged,and the features with no common surface were recognized by calculating whether their outlines had adjacent.For the order of removing small features,the depending features were first removed and then the depended features by building relationship between intersected features.The machining allowances on surfaces with higher requirements was added,and the split face was automatically selected or selected by users,thus the draft?angle was generated directly.The examples were demonstrated to verify the validity of the proposed method.

Key words: feature recognition, intersected features, extended attributed adjacency matrix, machining allowance, draft angle, blank model