| 基于NURBS理论的射流燃烧汽油机缸盖模具气道的CAD／CAM技术研究 |
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| 引用本文： | 杜君文 朴相镐. 基于NURBS理论的射流燃烧汽油机缸盖模具气道的CAD／CAM技术研究[J]. 内燃机学报, 1997, 15(4): 485-489 |
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| 作者姓名： | 杜君文 朴相镐 |
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| 作者单位： | 天津大学，吉林电气化高等专科学校 |
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| 摘 要： | 本文以当前国际上ＣＡＤ／ＣＡＭ领域最流行的非均匀有理Ｂ样条（ＮＵＲＢＳ）理论为数学模型，对射流燃烧汽油机缸盖模具的气道进行了曲面造型和曲面拟合；并结合气道曲面的实际，在数控加工中对气道曲面通过轴心线实施了分段剖分，并采用参数线法确定了刀心轨迹，进行刀具轨迹仿真，获得了数控加工气道曲面和型芯的ＮＣ程序。本研究对提高射流燃烧汽油机缸盖的模型的精度和效率，改进汽油机的气道设计均有重要意义。
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| 关 键 词： | 射流燃烧，气道造型，曲面拟合，数控加工 |
A CAD/CAM Technical Research on Molds of Jet Combustion Gasoline Engine Cylinderhead Based on Nurbs Principles |
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| Du Junwen. A CAD/CAM Technical Research on Molds of Jet Combustion Gasoline Engine Cylinderhead Based on Nurbs Principles[J]. Transactions of Csice, 1997, 15(4): 485-489 |
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| Authors: | Du Junwen |
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| Affiliation: | Du Junwen(Tianjin University) Piao Xianggao Liu Yanhua Geng Dexu(Jilin Electrifying Technical School) |
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| Abstract: | According to the current popular Non Uniform Rational B spline (NURBS) principles in the international CAD/CAM field, this paper studies the surface modelling and fitting of the tube of Jet combustion gasoline engine cylinderhead. To meet the practical requirement of NC machining tube surface is wisely divided into pieces along center axis, and parameter algorithm is adopted to determine the cutter center location and its simulation. Furthermore a NC application programming system has been developed, which deals with NC machining tube surface and core. The research is very useful to improve precision and efficiency as well as tube design of gasoline engine. |
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| Keywords: | Jet combustion Tube modelling Suface fitting NC machining |
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