面向多刀具组合方案选择的加工成本评价模型的研究.pdfVIP

计算机集成制造革统 Vo l. 14 No. 8 第 14 卷第 8 期 2 0 0 8 年 8 月 Computer Integrated Manufacturing Systems Aug.2008 文章编号:1006 一5911 (2008)08-1545-05 丽向多刀具组合方案选择的加工成本评价模型的研究 张英杰 (西安交通大学机械工辍学院，陕西 西安 710049) 摘 要:针对数控加工中最使刀具组合方式的选择问题，提出了一种适用于 2.5 维胶槽类零件加工的多刀具 组合方式的评价策略，并建立了相应的加工成本计算模型。在该模型中，不仅考虑了刀具的切削时间、空走刀时间 和换刀时间，还综合考虑了刀具磨损和机床折旧等因素的影响。为简化计算且便于管理，采用有向图表示法枚举 和表示所有可能的刀具组合形式。同时，在扫描线填充算法的基础上，提出了刀具有效加工区域的汁算新方法。实 践证明，该方法简单可行，为数控程序设计和优化开辟了一条新途径。 关键询:数控加工;加工成本p 刀具选择;评价模型;有向图 文献标识码:A 中图分3挂号:丁日166 Machining cost evaluation model for multiple tool sequences scheme selection ZHANG Ying-jie (5chool of Mechanical Engineering. Xian Jiaotong University , Xi在n 710049. China) Abstract , Aiming at determining optirnal tool sequences. a new evaluation strategy was proposed for multiple tool sequences of 2. 5 dimensional pockets machining. and the corresponding machining cost model was also presented. In this model , not only the cutting time. air cu! !ime and time spent on changes of tool8 were considered. but al50 cutting tool wear and depreciation of the machine tool usage were taken into account. 丁o simplify the computation. directed graph was used to represent all possible tool sequences. And an approach based on scan line filling algo- rithm was introduced to compute the accessible region of every tool and remaining uncut regions. The proposed method was proved to be simple and feasible. which provided a new way for optimization of Numerical Control (NC) machining. Key words , numerical control machining; machining