将圆环面铣刀等效为变直径平底铣刀,基于圆环面铣刀有效切削轮廓曲率与刀触点曲面法曲率匹配,初定刀具姿态,再利用通过圆环面刀圆角中心线的圆柱面与曲面等距面求交,推导了交线上各点坐标的计算公式.利用交线上干涉点数据,计算并调整刀具姿态,避免切削刃后缘和侧缘过切被加工表面,消除瓶颈干涉.此方法比起用刀触点曲率半径计算并消除瓶颈干涉,是一种更全面、合理、可行的实用方法.%The ring-surface cutter is equalized to the variable-diameter flat-end cutter, the posture of the cutter is initially determined based on the match of the effective cutting-profile curvature of the ring-face milling cutter and the surface curvature of the cutter-contact point, then intersection is gotten via the cylindrical surface and equidistant surface of the round-corner centerline of the ring-face milling cutter, and next the calculation formula of the coordinates of all the points on the intersection lines is deduced via the intersection of the cylindrical surface and curved surface of the cutter. The data of the interference points on the intersection lines are used to calculate and adjust the cutter orientation, avoid the trailing edge and the lateral edge of the cutting edge over cutting the machined surface and eliminate the bottle-neck interference. This method is more comprehensive, reasonable and practical than the method that uses the curvature radius of the cutter contact point to calculate and eliminate the bottle-neck interference.
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