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本文介绍了一个以下料为主要特征的工艺过程自动生成系统。该系统直接从CAD系统获取零件的有关信息,采用零件特征自动识别的方法来实现 CAD/CAPP的信息集成,自动生成零件的特征编码。利用工艺知识库,通过分级推理,自动完成零件的工艺过程设计。 相似文献
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本文介绍了一个以下料为主要特征的工艺过程自动生成系统。该系统直接从CAD系统获取零件的有关信息,采用零件特征自动识别的方法来实现CAD/CAPP的信息集成,自动生成零件的特征编码。利用工艺知识库,通过分级推理,自动完成零件的工艺过程设计。 相似文献
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钣金件CAPP系统主干工序创成工艺模型及知识的表达 总被引:1,自引:0,他引:1
以钣金件为应用对象,介绍了基于工具化思想的混合式CAPP系统的构成,重点讨论了形状特征主干工艺模型的表达方法,以及相关知识库的构造原则及表达组织方法 相似文献
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介绍基于C/S体系结构的集成工艺计划系统WGCAP6.x中特征识别技术,从AUIOCAD几何数据模型的工程图上自动识别加工特征,介绍了基于模式识别理论的识别原理,以工程语义和图形基本实体为模式基元,以实体之间的关系为操作规则,通过对模式类的搜索匹配完成识别.介绍了在AUIOCAD平台上使用ARX技术开发的特征识别系统及工作流程. 相似文献
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Rakesh Ranjan Niraj Kumar Rupesh Kumar Pandey M.K. Tiwari 《The International Journal of Advanced Manufacturing Technology》2005,26(7-8):861-869
Feature recognition systems are now widely identified as a cornerstone for conceiving an automated process planning system.
Various techniques have been reported in the literature, but a few of them acquired a status of generic methodology. A flexible
and robust approach is demanded for recognising a wide variety of features, e.g., non-interacting, interacting circular and
slanting features. This research aims to exploit the concept of the ray - firing technique, in which a 2D surface pattern
for each feature is generated and information is extracted from these patterns to correlate it with the corresponding machining
features. The system first defines a virtual surface and then probing rays are dropped from each point of this surface to
the 2.5D features of the B-rep solid model. According to the length of rays between the bottom face of the 2.5D machining
features and the virtual surface, 2D feature patterns are formed for each machining feature. Finally, features are recognised
using an algorithm described in this article. Different types of examples have been considered to demonstrate the effectiveness
of the proposed approach. 相似文献
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M. Sadaiah D. R. Yadav P. V. Mohanram P. Radhakrishnan 《The International Journal of Advanced Manufacturing Technology》2002,20(10):709-719
This paper deals with design and development of a generative computer-aided process planning (CAPP) system for prismatic components
and named PSG-CAPP. The proposed CAPP system has been divided into three modules. The first module is concerned with feature
extraction. The second and third modules deal with planning the set-up, machine selection, cutting tool selection, cutting
parameter selection, and generation of process plan sheet. The whole CAPP system is developed using Visual Basic 6.0 as front
end and Oracle 7.3 as back end. The SolidWorks98 plus has been used for modelling, and feature extraction has been implemented
using a program written in Visual Basic 6.0. The speciality of the developed CAPP system is that it is linked with the CAD
module and it extracts the majority of features automatically prior to process planning. The developed CAPP system has been
tested with aerospace components. The main feature of the proposed CAPP system is its ability to handle a variety of prismatic
components and generate process plans for them. A case study has been included to highlight the potential of the CAPP system.
ID="A1"Correspondance and offprint requests to: Professor P. V. Mohanram, Department of Mechanical Engineering, PSG College of Technology, Peelamedu, Coimbatore 641004,
India. E-mail: msadaiah@yahoo.com 相似文献
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面向加工过程的工艺知识分类和表示方法 总被引:2,自引:0,他引:2
工艺专家知识的分类和表示是开发创成式CAPP系统的重要内容之一,本文从机械加工过程的角度,探讨了工艺知识的分类、表示等问题。根据加工过程的层次性,归纳出工艺知识的具体分类,在此分类的基础上,运用面向对象的设计思想和知识的框架表示方法,提出了各类工艺知识的框架表示,提高了知识库的可维护性。 相似文献
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为了实现飞机钣金工艺几何特征的自动化设计,对传统的飞机钣金特征建模方法进行了研究,提出了飞机钣金特征自动化建模技术,基于知识与特征设计,开发了飞机钣金特征自动化建模系统,实现了钣金几何特征的快速自动生成,提高了飞机设计效率。 相似文献
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为了实现飞机钣金工艺几何特征的自动化设计,对传统的飞机钣金特征建模方法进行了研究,提出了飞机钣金特征自动化建模技术,基于知识与特征设计,开发了飞机钣金特征自动化建模系统,实现了钣金几何特征的快速自动生成,提高了飞机设计效率。 相似文献
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介绍了一种以CAD/CAPP集成环境下基于三维叶片泵类零件模型的工序图自动生成技术.该技术利用基于特征的理论,采用逆向重构法生成各道工序图.主要论述了叶片泵类零件工序图自动生成技术的设计思想、原理及方法,并给出实例,为解决叶片泵类零件工序图的自动生成提供了一条新的途径. 相似文献
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