| 铸件毛坯模型生成方法研究 |
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| 引用本文： | 常智勇,卫海峰,杨建新,姚都,赵杰.铸件毛坯模型生成方法研究[J].机械工程学报,2012,48(8):60-66. |
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| 作者姓名： | 常智勇 卫海峰 杨建新 姚都 赵杰 |
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| 作者单位： | 西北工业大学现代设计与集成制造技术教育部重点实验室 西安710072 |
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| 基金项目： | 工信部中国民用航空高级研究计划(20102013);西北工业大学研究生创业种子基金(Z2011082)资助项目 |
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| 摘 要： | 设计模型向制造模型的转换是实现CAD/CAPP/CAM集成的关键技术,而依据设计模型生成毛坯模型是其中关键环节,提出一种针对先铸造后机加零件的铸造毛坯模型生成方法。根据制造要求对模型表面进行分类;构造改进的扩展邻接属性图进行简单特征识别,依据铸造方法、铸件材质以及生产批量构造可铸造性判定算法,进行简单特征过滤;通过构造最小包络辅助面,并引入人工干预机加面分类机制,实现对包含非正交的表面加工边界面的零件模型的体加工特征包络,最终生成铸造毛坯模型。实例分析验证了算法的有效性与正确性。
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| 关 键 词： | 铸造毛坯 扩展属性邻接图 非正交边界 最小包络辅助面 |
Generation of Casting Model for Cast-then-machined Parts |
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| CHANG Zhiyong
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WEI Haifeng
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YANG Jianxin
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YAO Du
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ZHAO Jie.Generation of Casting Model for Cast-then-machined Parts[J].Chinese Journal of Mechanical Engineering,2012,48(8):60-66. |
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| Authors: | CHANG Zhiyong WEI Haifeng YANG Jianxin YAO Du ZHAO Jie |
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| Affiliation: | (The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology of Ministry of Education,Northwestern Polytechnical University,Xi’an 710072) |
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| Abstract: | The transformation from part design model to manufacturing model is the key technique to realize the integration of CAD/CAPP/CAM,and the key factor is the transformation from design model to blank model.A method of generating casting model for cast-then-machined part is proposed.The methodology is composed of classifying the part surfaces according to manufacturing requirements,constructing an improved extended attributed adjacency graphs(EAAG) to recognize simple features,filtering the castable simple features,enveloping the volumetric machining features containing nonnormal surfaces by means of constructing minimal enveloped auxiliary planes.An example is demonstrated to verify the validity and the effectiveness of the method. |
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| Keywords: | Casting model Extended attributed adjacency graphs Nonnormal surface Minimal enveloped auxiliary plane |
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