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Development of STEP ap224 Extractor for Interfacing Feature Based CapP to STEP-NC(ap238)

International Journal of Automation and computing 2019年第5期16卷 655-670页

作者： Deepanshu Srivastava Venkateswara Rao Komma Department of Mechanical Engineering Motilal Nehru National Institute of Technology

Manufacturing features represent area of interest on the machinable surface of a part, which can provide a unique set of removable volumes from part. Feature description in standard for exchange of product(STEP) ap224 is an efficient neutral format for the development of feature based process planning. Process planning information of features can be converted to numerical control(NC)code to have complete manufacturing information of part. STEP-NC code provides an efficient manufacturing information model compared to G-M codes. In this work, an interface is developed for extraction of feature information available in ap224(AIM) format and the ruled-based approach is used to select different process planning parameters. A graphical user interface(GUI) is developed for the interface for displaying features information as represented in ap224 file. Furthermore, the interface generates STEP-NC code in ap238 format. The developed interface has three modules. 1) Module I: Reading interface for STEP ap224 file and development of GUI. 2)Module II: Selection of feature based process planning parameters. 3) Module III: Writing interface for STEP-NC(ap238). The developed interface has been implemented in Java through Java standard data access interface(JSDAITM). The generated STEP-NC ap238 code for the test part has been successfully simulated on STEP-NC Machine TM, an ap238 simulator. This article also provides an in-depth view of application interpreted model(AIM) representation format of STEP for ap224 and ap238.

关键词： Standard for exchange of product (STEP) ap224 ap238 Java standard data access interface (JSDAITM) computer aided design(CAD)/computer aided process planning(CapP)/computer aided manufacturing(CAM)

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基于STEPap224特征信息模型的研究

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机械设计与制造 2005年第11期 146-148页

作者：刘哲孙军王军聂新刚王国勋沈阳建筑大学交通与机械工程学院沈阳110168

在介绍了STEPap224功能单元的基础上,提出了基于STEPap224特征信息模型,并对其实现过程中的几何/拓扑信息的提取和特征识别这两个关键技术加以阐述。此模型的实现,有利于CAD/CapP的集成,并为实现STEP-NC打下基础。

关键词：特征 STEP标准 ap224

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面向CAD/CapP/CAM的特征识别技术

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中国机械工程 2006年第S1期17卷 249-253页

作者：李伟平谷正气邓彪湖南大学汽车车身先进设计制造国家重点实验室长沙410082

针对当前CAX系统间难以实现产品信息交换和共享的问题,提出基于标准格式文件的加工特征识别方法。利用CAD软件的STEP ap203数据转换接口,获得CAD模型的几何拓扑信息;从零件的B-rep表达中提取加工特征,并将特征及几何拓扑信息写入ap224... 详细信息

针对当前CAX系统间难以实现产品信息交换和共享的问题,提出基于标准格式文件的加工特征识别方法。利用CAD软件的STEP ap203数据转换接口,获得CAD模型的几何拓扑信息;从零件的B-rep表达中提取加工特征,并将特征及几何拓扑信息写入ap224格式的中性文件,作为CapP和CAM的标准数据接口;利用Visual C++编程语言和STEP开发工具包ST-Developer进行了特征识别软件的开发,并给出实例以验证方法的有效性。

关键词： STEP ap203 ap224 特征识别中性文件

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