共查询到18条相似文献,搜索用时 109 毫秒
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基于人工神经网络的电火花加工工艺建模方法研究 总被引:3,自引:3,他引:0
电火花加工是一个受多参数影响的复杂随机过程,很难建立一个适当的机理模型。用神经网络技术以铜加工SKD-Ⅱ为例建立了电火花加工工艺模型,并依据工艺样本中各参数数据的不同特点采用了不同的预处理方法,测试表明效果较好,所建模型能精确地预测出给定条件下的加工工艺参数,反映了该机床的加工工艺规律。另外,采用石墨加工SKD-Ⅱ工艺数据验证了该方法的通用性及有效性。 相似文献
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快走丝电火花线切割加工仿真系统 总被引:1,自引:1,他引:0
通过神经网络技术建立了快走丝电火花线切割加工工艺模型 ,利用穷举法建立了具有一定人工智能的工艺参数全局优化系统 ,开发了模具电火花加工过程仿真系统。该系统不仅可以精确预测加工效果 ,而且克服了工艺参数表的局限性 ,弥补了建立在工艺参数表基础上的参数自动选取系统的缺陷 ,实现了工艺参数全局最优化。测试结果及实际使用结果表明本文所建立的仿真系统反映了机床的加工工艺特性 ,预测误差基本控制在 8%内 ,系统的参数优化选取功能使机床的加工性能得以充分发挥。仿真系统具有广泛的通用性 ,可适用于不同类型的线切割加工机床。 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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阐述了如何结合专家系统和人工神经网络技术来开发外圆车削加工的计算机辅助工艺系统。根据设计要求,专家系统的推理机制能从相应的知识库中寻找出适合的工艺流程和参数;另一方面,同样的人工神经网络结构能根据不同的训练数据提供不同的答案,因此弥补了专家系统灵活性不足的缺点。所以,一个集成了两者的复合系统必将提供更好的实用性。 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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为提高计算机辅助工艺规划系统的柔性、可扩展性、可重用性和动态适应性,提出了一种基于多代理的智能计算机辅助工艺规划系统体系结构,研究了智能计算机辅助工艺规划系统的工作机理,以及工艺路线生成代理和协调代理的详细结构和功能.利用基于规则和基于实例的推理方法,解决智能计算机辅助工艺规划系统生成工艺路线过程中产生的冲突,开发了相应的代理模块,并在液压支架的生产过程中得到应用.结果表明,基于多代理系统的计算机辅助工艺规划系统具有良好的柔性、可扩展性和可重用性,能够满足企业产品和生产条件变化的需求. 相似文献
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V. B. Sunil S. S. Pande 《The International Journal of Advanced Manufacturing Technology》2009,41(9-10):932-947
We report on the development of an intelligent system for recognizing prismatic part machining features from CAD models using an artificial neural network. A unique 12-node vector scheme has been proposed to represent machining feature families having variations in topology and geometry. The B-Rep CAD model in ACIS format is preprocessed to generate the feature representation vectors, which are then fed to the neural network for classification. The ANN-based feature-recognition (FR) system was trained with a large set of feature patterns and optimized for its performance. The system was able to efficiently recognize a wide range of complex machining features allowing variations in feature topology and geometry. The data of the recognized features was post-processed and linked to a feature-based CAPP system for CNC machining. The FR system provided seamless integration from CAD model to CNC programming. 相似文献