关键词: 自动代码生成, 回转体, 轮廓识别, 最右侧判别法

Abstract: Extractions of internal and external contour information of revolving parts is of great importance to enable automatic generation of NC machining codes. This paper puts forward an automatic recognition algorithm for inner and outer contours of revolving parts via the “clockwise-rightmost” discriminant method. Information related to the geometric entities, saved in the systematic text structure in DXF, combined with the symmetry information of the revolving body parts, is utilized to the elimination of the redundant features such as the dimension marking, profile lines, roughness marking, form and position tolerance marking, etc. Finally the clockwise rightmost discrimination algorithm is used for the recognition of the contour anticlockwise. The algorithm demonstrates many advantages, especially the reduced computational complexity, therefore can identify the internal and external contour of the part effectively and robustly.

Key words: automatic programming, revolving body, contour recognition, extreme clockwise discrimination algorithm