【摘要】 模具型腔粗加工正在从传统的单刀策略向多刀组合策略转变,粗加工刀具组合优化可显著提高模具整体加工效率。现行的CAM编程软件刀具的选择主要基于编程者的经验,易于出错且很难做到最优化。研究提出了模具型腔粗加工中基于CAD实体模型自动进行刀具选择和优化的系统化方法,建立了优化数学模型,设计了相应的算法,包括截交轮廓的生成、内外环的判断以及搜索层的合并。所提方法和算法在UG二次开发环境下进行了编程实现和算例验证,结果表明该方法是可行有效的。更多还原

【Abstract】 The strategy for die/mold cavity CNC rough machining is transforming from traditional single-tool approach to a combination of several cutting tools due to the application of high-speed CNC center. Tool combination optimization for roughing can increase the total machining efficiency significantly. The tool selection by using existing CAM software is mainly based on experience, so it is error-prone and hard to reach optimum results. A systematic methodology for automatic tool selection in die/mold cavities roughing based on CAD model intersecting by a series of hunting planes is proposed. A mathematical model for tool combination optimization is established, and various algorithms, including loop generation, inner and outer loop identification and hunting layer merging, are presented. The methodology is implemented in UG/open context, and two examples are given to show the validity and feasibility of the proposed methodology.更多还原