关键词: 环切加工, 轨迹规划, 尖角, 数控加工, 残留区域

Abstract: Aiming at the problem of residual regions in Contour-Parallel Offset (CPO) tool-path, a simple and effective clean-up tool-path planning method was proposed to clean up residual regions. In this method, the sharp corner was identified from tool-path, and sharp corner pairs were matched to define the residual regions which could not processing. For each sharp corner pair, the vertex of son sharp corner were taken as the initial computational condition to calculate its Frenet frame information, by which the next approximate position on the clean-up tool-path was predicted and adjusted to an accurate one under a certain tolerance. Thus the accurate position was obtained. This procedure was repeated to grow the clear-up tool-path gradually until the radius of the medial axis transform circular equaled to the tool radius. Simulations showed that this method was effective in clearing up residual regions.

Key words: contour-parallel offset machining, tool-path planning, sharp corner, numerical control, residual region