基于多色集合理论的加工工艺规划建模与推理技术的研究

发布时间：2018-04-11 09:57

本文选题：多色集合理论 + 加工中心　；参考：《河北科技大学》2011年硕士论文

【摘要】：加工工艺决策是生产技术准备工作的第一步,也是连接产品设计与产品制造之间的桥梁。工艺规划决策是进行工装设计与加工路线设计的主要依据,它对组织生产、保证产品质量、提高劳动生产率、降低成本、缩短生产周期及改善劳动条件等都有着直接的影响,因此是生产中的关键工作。针对加工中心上复杂箱体零件一次装夹下的工艺决策,本文主要完成以下工作:研究了加工方案的优化选择,通过从建立的箱体零件知识混合模型上获取进行工艺决策的特征信息,利用建立的关系模型生成加工方案候选集,对其进行优化获得合理的加工方案;研究了刀具的整体优化,根据生成的加工方案,结合箱体零件的特征信息,选择合理的加工刀具;研究了基于约束模型的遗传算法进行工步排序,根据以辅助加工时间最短为优化目标的工步排序原则,建立了问题的数学优化模型,采用多色集合理论中的围道布尔矩阵建立了问题的约束模型,直观地描述了问题的约束条件;设计了基于约束模型的遗传算法进行工步排序,由于引入了约束模型,遗传算法的整个搜索过程都被控制在有效解范围内。论文采用多色集合理论建立工艺规划模型,将零件的特征信息同工艺知识紧密的联合到一起,彼此之间产生关联;然后,主要利用多色集合中的着色的逻辑运算,并结合模糊算法和遗传算法进行决策推理获得合理的决策结果。本课题所设计的面向CAPP的箱体零件的工艺决策系统,是在CAXA实体设计平台上利用Visual C++ 6.0进行开发的。系统基于Windows XP操作系统,采用Microsoft Access数据库进行管理,具有友好的用户界面。
[Abstract]:Process decision is the first step in the preparation of production technology and a bridge between product design and manufacturing.Process planning decision is the main basis for tooling design and processing route design. It has a direct effect on organizing production, ensuring product quality, improving labor productivity, reducing cost, shortening production cycle and improving working conditions.Therefore, it is the key work in production.In view of the process decision of the complicated box parts in the machining center under one clamping, this paper mainly accomplishes the following work: the optimization of the processing scheme is studied.Through obtaining the characteristic information of process decision from the knowledge mixing model of box parts, the candidate set of machining scheme is generated by using the established relational model, and the reasonable machining scheme is obtained by optimizing it.According to the generated machining scheme and the characteristic information of the box parts, the reasonable machining tool is selected, and the genetic algorithm based on constraint model is studied.The mathematical optimization model of the problem is established, the constraint model of the problem is established by using the circumscribed Boolean matrix in the polychromatic set theory, the constraint conditions of the problem are described intuitively, and the genetic algorithm based on the constraint model is designed for scheduling.Because of the introduction of constraint model, the whole search process of genetic algorithm is controlled within the range of efficient solution.In this paper, the polychromatic set theory is used to establish the process planning model, which combines the feature information of the parts with the process knowledge closely and has a correlation with each other. Then, it mainly uses the coloring logic operation in the polychromatic set.Fuzzy algorithm and genetic algorithm are combined to obtain reasonable decision results.The process decision system for CAPP oriented box parts is developed on the platform of CAXA entity design using Visual C 6.0.The system is based on Windows XP operating system and is managed by Microsoft Access database. It has a friendly user interface.
【学位授予单位】：河北科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH162

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