| 摘要 |
<p>A region machining method by which the interior of a region (AR) is machined by moving a tool along a plurality of offset passages (CPT1, CPT2, ... CPTn) which are in turn offset inwardly by a predetermined space from a closed curved line (OLC) which defines the region. In this region machining method, the center of gravity (W) of the region (AR) is determined to check whether the center of gravity is in the interior of the region, and whether the segments (L1, L2, L3, ...) connecting the center of gravity and each vertex (P1, P2, ... P10) of the region each other cross the closed curved line (OLC). When the center of gravity (W) is in the interior of the region and these segments do not cross the closed curved line, each segment is divided into a predetermined number of parts without dividing the region into a plurality of convex polygons even if the region is a concave-polygon, and a tool is moved for machining along a plurality of closed passages (CPT1-CPTn) which are formed by connecting together the divided points Pi1--Pi2--Pi3--Pi4--Pi5--Pi6--Pi7--Pi8--Pi9--Pi10 (i=a, b, ...n) which correspond to the divided points of the segments.</p> |
