| 检具设计中延伸曲面修补方法 |
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| 引用本文： | 姜坤,周雄辉,黎旻,张春捷.检具设计中延伸曲面修补方法[J].上海交通大学学报,2011,45(11):1720-1724. |
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| 作者姓名： | 姜坤 周雄辉 黎旻 张春捷 |
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| 作者单位： | (1.上海交通大学 模具CAD国家工程研究中心, 上海 200030； 2.上海申模模具制造有限公司， 上海 201203) |
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| 基金项目： | 国家自然科学基金资助项目(60903111) |
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| 摘 要： | 在检具检测部位（模拟块）设计中，为了完全匹配被检制品的表面结构，常常需要进行复杂曲面的延伸操作.提出了一种解决在一阶不连续点处的延伸面分裂与相交的曲面自动延伸算法.该算法通过识别零件的待检测部位边界，判断其端点处的一阶连续性，若满足凸延伸条件，则采用球面正权值有理Bézier曲线过渡；若满足凹延伸条件，则剪裁延伸偏置曲线，并采用三次Bézier曲线过渡，从而避免曲面边界延伸曲线的不连续性，实现复杂曲面的自动延伸.最后以汽车翼子板检具设计为例，证明了算法的有效性与实用性.
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| 关 键 词： | 检具 曲面延伸 分裂 相交 交叠 修补 |
| 收稿时间： | 2010-10-28 |
Extension Surface Reparation in Checking Fixture Design |
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| JIANG Kun,ZHOU Xiong-hui,LI Ming,ZHANG Chun-jie.Extension Surface Reparation in Checking Fixture Design[J].Journal of Shanghai Jiaotong University,2011,45(11):1720-1724. |
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| Authors: | JIANG Kun ZHOU Xiong-hui LI Ming ZHANG Chun-jie |
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| Affiliation: | (1. National Die & Mold CAD Engineering Research Center, Shanghai Jiaotong University, Shanghai 200030, China; 2. Shanghai Shenmo Die & Mold Manufacturing Co., Ltd., Shanghai 201203, China) |
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| Abstract: | Checking mechanism design,one of the most complex tasks in the checking fixture design(CFD),for which accurately mate to the surface shape of the checked part,usually contains lots of complicated surface extension operations.However,there are many branching and intersection/overlapping problems at the first-order-discontinuity points of B-rep edges by current surface extension methods.A new automatic surface extension approach was proposed,which can repair the branching and intersection/overlapping problems... |
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| Keywords: | checking fixture surface extension branching intersection overlapping reparation |
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