| Parametric design of a part with free-form surfaces |
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| 作者姓名： | KIM Yeoung-il KIM Li-ra JUN Cha-soo |
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| 作者单位： | Reseach Institute for CAD/CAM CITEK System Changwon 641-845 Korea，School of Industrial and Systems Engineering Gyeongsang National University Jinju 660-701 Korea，Research Center for Aircraft Parts Technology School of Industrial and Systems Engineering Gyeongsang National University Jinju 660-701 Korea |
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| 摘 要： | INTRODUCTION A 3D solid model is used in various processes such as design, engineering evaluation, drafting, manufacturing, and so on. It is a time-consuming and skill-required job to create a complicated 3D solid model. Most commercial CAD tools support func- tions to generate engineering drawings from solid models automatically. However, adjusting layouts, dimensioning, and inserting annotations are required and they are tedious and time-consuming work. Most current CAD/CAM/CAE so…
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| 关 键 词： | 参数模型 自由曲面 实体模型 CAD |
| 收稿时间： | 2006-03-20 |
| 修稿时间： | 2006-05-21 |
Parametric design of a part with free-form surfaces |
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| KIM Yeoung-il KIM Li-ra JUN Cha-soo.Parametric design of a part with free-form surfaces[J].Journal of Zhejiang University Science,2006,7(9):1530-1534. |
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| Authors: | Yeoung-il Kim Li-ra Kim Cha-soo Jun |
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| Institution: | (1) Research Institute for CAD/CAM, CITEK System, Changwon, 641-845, Korea;(2) School of Industrial and Systems Engineering, Gyeongsang National University, Jinju, 660-701, Korea;(3) Research Center for Aircraft Parts Technology, School of Industrial and Systems Engineering, Gyeongsang National University, Jinju, 660-701, Korea |
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| Abstract: | 3D solid models for parts with regular-form surfaces (PRFSs) are effectively generated using traditional parametric design techniques. A new model is obtained by changing some parameters defining the model. The parts with free-form surfaces (PFFSs), however, cannot be defined by several parameters. Usually they are defined by some geometric elements like profile curves. The traditional parametric design approaches have not easily dealt with the PFFSs. A method for generating a solid model and an engineering drawing for PFFSs is proposed in this paper: First, the new profiles are generated from input point data. Second, the profile information is extracted from the existing model. Last, the old profiles are replaced with the new profiles. This method can preserve the associative information of the existing model and automatically generate the drawing including views, dimen- sions, and annotations. The proposed method has been implemented using a commercial CAD/CAM system, Unigraphics, and API functions written in C-language, and were applied to the blades of a turbine generator. Some illustrative examples are pro- vided in order to show the effectiveness of the proposed method. |
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| Keywords: | Parametric modelling Free-form surface Solid model Drawing |
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