复杂结构件加工特征用户自定义及识别方法

发布时间：2018-06-21 20:39

本文选题：用户自定义加工特征 + 加工特征表达　；参考：《南京航空航天大学》2016年硕士论文

【摘要】：结合国家科技重大专项、国家自然科学基金项目及航空航天制造企业的实际需求,针对复杂结构件加工特征定义适用性差,难以支持不同零件结构及不同工艺水平下复杂结构件数控加工工艺决策的问题,本文对复杂结构件加工特征用户自定义与识别技术进行了深入研究,论文主要成果如下:1)提出了复杂结构件加工特征用户自定义方法。构建了用户自定义加工特征模型,基于全息属性面边图和语义规则对用户自定义加工特征几何信息进行描述,并给出了用户自定义加工特征工艺信息的定义规范和方法,实现了加工特征的用户自定义。2)研究了复杂结构件用户自定义加工特征的自动识别方法。针对用户自定义加工特征种类多、差异大,传统特征识别方法难以满足其自动识别的问题,给出了通用的用户自定义加工特征数据解析方法,基于全息属性面边图建立了零件模型至用户自定义加工特征几何信息的映射机制,实现了用户自定义加工特征的自动识别。3)研究了复杂结构件用户自定义加工特征的工艺决策方法。建立了用户自定义加工特征几何信息与加工工艺规则的关联关系,给出了基于产生式规则推理的用户自定义加工特征几何信息至加工操作参数的映射方法,实现了用户自定义加工特征的工艺决策。4)依据本文的研究内容,基于CATI A V5平台,开发了复杂结构件用户自定义加工特征智能编程系统,已在某航空企业得到验证,并取得良好的效果。
[Abstract]:Combined with the major national scientific and technological projects and the actual needs of the National Natural Science Foundation and aerospace manufacturing enterprises, the applicability of the definition of processing characteristics of complex structural parts is poor. It is difficult to support the problem of NC machining process decision of complex structural parts with different parts structure and different process level. In this paper, the user-defined and identifying technology of machining features of complex structural parts is studied in depth. The main achievements of this paper are as follows: (1) A user-defined method for machining features of complex structural parts is proposed. The user-defined machining feature model is constructed, and the geometric information of user-defined machining feature is described based on holographic attribute edge graph and semantic rules, and the definition specification and method of user-defined processing feature technology information are given. The user definition of machining features is realized. 2) the automatic recognition method of user defined machining features for complex structural parts is studied. In order to solve the problem that the traditional feature recognition method is difficult to satisfy the problem of automatic recognition, a general analysis method of user-defined processing feature data is presented. The mapping mechanism from part model to user-defined machining feature geometric information is established based on holographic attribute edge graph. The automatic recognition of user-defined machining features is realized. 3) the process decision method of user-defined machining features for complex structural parts is studied. The relationship between user-defined machining feature geometry information and machining process rules is established, and the mapping method from user-defined machining feature geometry information to machining operation parameters based on production rule reasoning is presented. According to the research content of this paper, based on CATI A V5 platform, an intelligent programming system for user defined machining features of complex structural parts is developed, which has been verified in an aviation enterprise. And achieved good results.
【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】：2016
【分类号】：V260.6

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