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《机电工程》2021,38(6)
在航空发动机叶片的加工中,传统转台因长期磨损后造成精度下降,达不到航发叶片的加工要求,为此设计了一种针对新型二级斜齿轮传动转台的非标开槽碟簧随动补偿磨损误差机构。利用非标开槽碟簧特有的变刚度和渐减性载荷-位移曲线特征,消除了齿轮副长期啮合产生的磨损间隙;同时,在新机构设计中,对作为此机构核心部件的非标开槽碟簧的设计进行了详细阐述;运用了ANSYS分析和实验相结合的方法,对开槽碟簧随动补偿机构设计及非标开槽碟簧设计的正确性进行了验证。研究结果表明:所设计的碟簧可用于补偿机构,实现对磨损误差的实时补偿,达到提高转台精度的目的,满足航空发动机叶片极高的加工要求。 相似文献
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《计算机集成制造系统》2017,(4)
为便捷准确地添加工艺信息,提出了基于加工特征的工艺信息重用方法。利用面向对象的方法创建了工艺信息的层次化表达模型,将加工知识单元分为特征层、加工层和元素层进行组织与管理;创建了预定义加工特征与工艺信息的关联机制,以确保工艺信息的准确获取;分析了各类预定义加工特征的几何信息和边界属性信息,从而构建出特征的表达与组织方法;利用加工特征的匹配策略实现了工艺信息的快速添加,并基于实例验证了所提方法的有效性。该方法的实现可为工艺知识的重用与积累奠定基础,对推广智能化工艺设计的发展与应用具有重要意义。 相似文献
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面向大批量定制的NC加工智能化设计 总被引:1,自引:0,他引:1
为了更好的支持面向大批量定制技术的NC程序设计,在专家工艺知识和前期零件加工工艺路线的基础上,使用Visual Lisp语言编制了NC智能化设计系统。采用事物特性表技术,从产品数据管理(PDM)系统的主图中派生出CAD工程图,并通过调用接口进入系统界面。重点分析了NC智能设计的模块化思想,以及运用数据数组使系统智能识别加工零件的基本特征,并通过切削运行轨迹的动态仿真过程得到了NC程序代码,以支持产品大批量定制的NC加工智能化设计。最后,应用T6436汽轮机转子通流段实例进行了原理验证。研究结果表明:NC加工智能化设计为大批量定制技术奠定了基础。 相似文献
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介绍了一种激光切割加工中cAPP系统工艺数据库设计与开发,该系统可以提供激光切割加工的各种加工方法和工艺参数的选择,实现激光切割工艺标准化,并为智能化工艺设计打基础。 相似文献
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将数控工艺的设计分成了两大模块,即加工特征级的智能工艺决策过程和加工方法级的派生式数控代码生成。对加工特征进行数控加工工步设计时,辅以加工特征数控工艺决策知识库、机床特征映射库和刀具特征映射库的智能支持,提高了工艺决策的准确性和智能化水平。同时以加工特征为单元,采用参数化编程技术实现数控程序的派生式生成,提高了数控程序设计效率和质量,并有利于数控程序设计的自动化、智能化、模块化。 相似文献
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探讨并行设计环境下基于特征模型的工艺设计过程,提出通过关联特征的约束推理和特征分组,实现加工工艺方案优化的方法,分析引起产品制造问题的原因,提供产品设计上的改进意见,或对设计知识规则进行更新,实现产品设计与工艺设计的双向动态控制和并行求解。 相似文献
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CAPP面向对象知识库管理系统的设计与实现 总被引:7,自引:1,他引:6
知识库是 CAPP系统的核心。本文采用面向对象方法对工艺知识进行表示与组织 ,在此基础上设计开发了 CAPP面向对象知识库管理系统 (OO- CAPP-KBMS) ,并对面向对象知识库管理系统的体系结构、设计与实现方法及所采用的一些关键技术作以介绍 相似文献
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Changqing Liu Yingguang Li Weiming Shen 《The International Journal of Advanced Manufacturing Technology》2014,75(9-12):1457-1471
Dynamic manufacturing environments require a flexible process planning and control system in response to changing manufacturing resource availability, production uncertainty, and dynamic machining conditions. To address these issues, this paper proposes a novel integrated process planning and control method based on intelligent software agents and multi-dimension manufacturing features. An integration framework with three modules including generic process planning, shop floor process planning, and online process control is developed. An intelligent agent-based approach is adopted for achieving intelligence and autonomy of individual software modules and components. An ontology-based multi-dimension manufacturing feature model is proposed to facilitate the communication and collaboration between process planning and control, as well as to speed up the decision-making of intelligent agents. The feasibility and flexibility of the proposed method are validated through a proof-of-concept implementation. 相似文献
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Saleh M. Amaitik S. Engin Kiliç 《The International Journal of Advanced Manufacturing Technology》2007,31(9-10):978-993
This paper presents an intelligent process planning system using STEP features (ST-FeatCAPP) for prismatic parts. The system maps a STEP AP224 XML data file, without using a complex feature recognition process, and produces the corresponding machining operations to generate the process plan and corresponding STEP-NC in XML format. It carries out several stages of process planning such as operations selection, tool selection, machining parameters determination, machine tools selection and setup planning. A hybrid approach of most recent techniques (neural networks, fuzzy logic and rule-based) of artificial intelligence is used as the inference engine of the developed system. An object-oriented approach is used in the definition and implementation of the system. An example part is tested and the corresponding process plan is presented to demonstrate and verify the proposed CAPP system. The paper thus suggests a new feature-based intelligent CAPP system for avoiding complex feature recognition and knowledge acquisition problems. 相似文献
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Yu Dequan Zhang Rui Chen Jun Zhao Zhen 《The International Journal of Advanced Manufacturing Technology》2006,29(7-8):663-669
This paper gives a brief introduction to establishing a knowledge-based system for intelligent stamping process planning.
Studies on the system’s framework, knowledge model and reasoning mode are introduced. Some key technologies such as the feasibility
of the stamping process, an optimal algorithm for blank layout, intelligent strip layout and force calculation are researched.
The efficiency of stamping process planning can be improved by the system. 相似文献
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Development of Expert System for Concurrent Product Design and Planning for Assembly 总被引:5,自引:3,他引:2
X. F. Zha S. Y. E. Lim S. C. Fok 《The International Journal of Advanced Manufacturing Technology》1999,15(3):153-162
This paper addresses the development of an expert system for concurrent product design and assembly planning (CDAPFAES) including
conceptual design, detailed design, assemblability analysis and design for assembly, assembly system design, assembly process
planning and stimulation, and technical–economics justification. This approach is implemented through an agent-based framework
with concurrent integration of multiple cooperative knowledge sources and software. This intelligent system can offer systematic
assistance for assembly design and planning in the early stage of product development and facilitate, as far as possible,
the use of flexible assembly equipment, including robots. Finally, this new design methodology is illustrated with a successful
implementation of a switch product design. 相似文献
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LIANG Jun JIANG Zuhua ZHEN Lu SU Hai WANG Kuoming 《机械工程学报(英文版)》2007,20(5):101-105
To support and serve engineering design, creative design based on knowledge management is proposed. The key knowledge factors of creative design are analyzed and discussed, and knowledge extraction tools are utilized to distill the important knowledge to serve for knowledge resource of creative design. The implementation of creative design mode is described and executed, which can promote the intelligent asset of the enterprise and shorten the period of creative design. With this study, design afflatus and conceptual design can be achieved expediently and effectively. 相似文献
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通过分析智能诊断过程的内在属性,结合国内外的相关研究状况,提出了研究基于自组织的智能诊断技术的重要意义,并指出其优越性.详细阐述了智能诊断的自组织规划过程,结合多代理技术的自身特点及优越性.提出将多代理技术应用于智能诊断过程中.深入研究了基于多代理的自组织过程实现策略,采用基于响应时间、服务质量、服务成本、安全性目标准则的资源优化调度算法,解决了自组织过程规划中的资源管理和协调等关键问题,并通过实例验证了算法的正确性. 相似文献