关键词: 工序几何建模, 过渡特征简化, 布尔差运算, 车削加工

Abstract: To build In-Process model rapidly,an In-Process modeling method was proposed by combining blend feature simplification with boundary extraction of machining feature.Boundary of the machining feature was obtained by simplifying blend features in machining feature,and it was selected to build processing volume characteristic by rotation,sweep,or stretching.Boolean subtraction between the former In-Process model and the processing volume characteristics was operated to obtain In-Process model.Edge blends and vertex blends were distinguish,and the situation of support surface lose was analyzed when blend features simplified.A process of typical shaft parts turning In-Process modeling was provided to analyze the In-Process model's dimension change rule which was built by different boundary of machining feature.The effectiveness of proposed method was verified by examples.

Key words: in process modeling, blend feature, simplification, boolean subtraction, turning