| 内燃机燃烧室芯头反求设计的CAD/CAM技术研究 |
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| 引用本文： | 张红兵,杜建红,况定科. 内燃机燃烧室芯头反求设计的CAD/CAM技术研究[J]. 机械设计与制造, 2003, 0(5): 44-46 |
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| 作者姓名： | 张红兵 杜建红 况定科 |
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| 作者单位： | 1. 苏州职业大学,CAD/CAM中心,苏州,215011
2. 重庆长安汽车集团股份有限公司,重庆,630000 |
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| 摘 要： | 以某发动机燃烧室铸造芯头为研究对象，采用非接触式光电测量技术获得了七万多个数据点，并对测量数据进行了预处理；运用CAD技术对散乱数据点进行了NURBS曲面拟合和光顺处理，生成了结构的三维实体模型；采用CAM技术对该芯头的数控加工技术进行了研究，编制了NC代码，加工出了符合要求的产品模型，成功的为某汽油机燃烧室的改进定型提供了技术指导。在此基础上生成的CAD／CAM软件系统可以应用于其它复杂曲面产品的反求工程。
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| 关 键 词： | 内燃机 燃烧室 芯头 反求设计 CAD CAM 光电测量 反求工程 曲面重构 |
| 文章编号： | 1001-3997(2003)05-0044-03 |
| 修稿时间： | 2003-01-07 |
Research on CAD/CAM technology of reverse design in a combustion chamber casting core |
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| ZHANG Hong-bing,DU Jian-hong. Research on CAD/CAM technology of reverse design in a combustion chamber casting core[J]. Machinery Design & Manufacture, 2003, 0(5): 44-46 |
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| Authors: | ZHANG Hong-bing DU Jian-hong |
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| Abstract: | In this paper, a core used in casting combustion chamber is analyzed. More than 70 thousands data-points are obtained by untouched measurement. The interface program is edited to deal with these data. The NURBS method is used to smooth curved-surface connection. Three-dimensional model is generated. On the base of these, NC code is programmed and suitable wax mock-up is machined. These successfully instruct to improve type of combustion chamber of gasoline engine. The system of CAD/CAM used in this research is suited for reverse research of others curved surface. |
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| Keywords: | Reverse engineering CAD/CAM Curved surface reconstruction Engine |
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