电子关键零件数控工艺快速辅助设计技术研究

发布时间：2018-05-26 15:37

本文选题：电子类零件 + 数控加工工艺　；参考：《南京航空航天大学》2015年硕士论文

【摘要】：随着对加工效率和质量的要求越来越高,电子关键零件大多采用数控方式加工。但企业许多优化的数控工艺知识得不到积累传承,工艺设计多依赖于有经验工艺人员,造成了数控工艺设计的不规范;由于零件结构复杂,使得单个零件的编程时间长效率低。针对上述问题,本文对电子类关键零件数控工艺快速辅助设计技术进行了研究,通过利用工艺数据库对工艺知识进行总结管理,并对其进行了集成应用,实现了数控工艺的快速辅助设计。本文的主要工作如下:(1)对电子类关键零件进行了总结和分类,总结了电子类零件存在的典型结构特征,建立了结构特征的数控加工工艺模型,并在结构特征拓扑结构的基础上,建立了零件的数控工艺信息模型。(2)基于实例推理方法对零件的工艺模型进行了重构,获得了工艺实例模型。研究了基于UG/CAM二次开发接口的工艺知识自动提取技术和基于关系矩阵的工艺实例存储技术。研究了特征级别和零件级别上的相似度计算方法、基于知识库的相似实例修改重用技术、实例保存技术。最后通过数控加工实例验证了所提算法的正确性,并利用UG的CAM模块进行了数控加工仿真,仿真结果表明该算法可以有效地进行数控工艺辅助设计。(3)在对企业具体实际需求分析的基础上,确定了电子关键零件数控工艺快速辅助设计系统的业务流程,对系统进行了总体设计,对系统所用数据库进行了设计。(4)开发了电子关键零件数控工艺快速辅助设计系统。主要实现了2个方面的应用:一是电子类关键零件的数控工艺管理系统,实现了数控工艺知识、零件工艺信息、专家打分等信息的管理。二是基于UG/CAM的二次开发接口,对数控工艺管理系统在UG/CAM中进行了集成应用,实现了相似零件模板检索、工艺参数数据检索、特征工艺参数推理等功能。该系统已得到实际的应用,可有效地缩短数控工艺人员数控编程时间。
[Abstract]:With the increasing requirement of machining efficiency and quality, most of the key electronic parts are machined by numerical control. However, many optimized NC process knowledge can not be accumulated and passed on in the enterprise. The process design depends on experienced technicians, which results in nonstandard NC process planning. Because of the complex structure of parts, the programming time of single part is long and inefficient. In order to solve the above problems, this paper studies the fast aided design technology of digital control process for the key parts of electronic class, summarizes and manages the process knowledge by using the process database, and applies it to the integrated application. The fast aided design of NC process is realized. The main work of this paper is as follows: (1) summarize and classify the key parts of the electronic category, summarize the typical structural features of the electronic parts, establish the NC machining process model of the structural features, and on the basis of the topological structure of the structural features, The numerical control process information model of the part is established. (2) the process model of the part is reconstructed based on case-based reasoning method, and the process example model is obtained. The technology of automatic extraction of process knowledge based on UG/CAM secondary development interface and the technology of process instance storage based on relational matrix are studied. The similarity calculation method between feature level and part level is studied. The similar case modification and reuse technology based on knowledge base and the case preservation technology are studied. Finally, the correctness of the proposed algorithm is verified by a numerical control machining example, and the NC machining simulation is carried out by using UG CAM module. The simulation results show that the algorithm can effectively carry out the numerical control process aided design. On the basis of analyzing the actual requirements of the enterprise, the business process of the digital control process rapid aided design system for the electronic key parts is determined. The system is designed as a whole, and the database used in the system is designed. 4) the fast aided design system for the numerical control process of the electronic key parts is developed. This paper mainly realizes the application of two aspects: the first is the CNC process management system of the key parts of the electronic class, which realizes the management of the NC process knowledge, part process information, expert grading and so on. Secondly, based on the secondary development interface of UG/CAM, the NC process management system is integrated and applied in UG/CAM. The functions of similar part template retrieval, process parameter data retrieval and feature process parameter reasoning are realized. The system has been applied in practice and can effectively shorten the NC programming time of NC technicians.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：V260.6

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