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Proceedings of CAD'17, 2017, 165-169
Fast Computation of Accessibility Cones for Assisting Process Planning of 3+2 Axis Milling
Abstract. In the automobile industry, molds with very deep shape are often used for producing large plastic parts, such as instrument panels. In the usual 3-axis milling, cutters with long shank is necessary to avoid collisions between the holder and the mold in the semi-finishing. Since large deformation of the cutter is unavoidable with a long shank, it is difficult to realize the precise and stable machining. To solve this problem, many manufacturers in Japan use 3+2 axis milling for the semi-finishing. In this method, the machine executes a 3-axis milling program with a cutter locked in a tilted position using its 2 rotational axes. In the 3+2 axis milling, shank length can be reduced by properly selecting the cutter posture. Similar advantage can be expected by using a simultaneous 5-axis milling machine, however the cutter in a fixed posture is more rigid so much accurate machining results can be realized.
Keywords. Offsetting, Depth Buffer, Hierarchical Bounding Boxes, GPU