| 基于残余应力分布的框类零件装夹方案优选的有限元模拟 |
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| 引用本文： | 董辉跃,柯映林,吴群,许德.基于残余应力分布的框类零件装夹方案优选的有限元模拟[J].航空学报,2003,24(4):382-384. |
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| 作者姓名： | 董辉跃 柯映林 吴群 许德 |
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| 作者单位： | 1. 浙江大学,机械与能源工程学院,浙江,杭州,310027
2. 成都飞机工业,集团,有限责任公司,四川,成都,610092 |
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| 基金项目： | 国家自然科学基金 ( 5 0 175 10 2 )，国防型号工程( 0 0 1810 0 785 )资助项目 |
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| 摘 要： | 非均匀分布的残余应力是引起工件变形的主要原因。为了揭示装夹方案对残余应力的影响,利用有限元技术模拟了工件加工过程中不同的装夹方案,并分析了模拟结果。结果表明,装夹位置对残余应力分布具有重要影响,而装夹顺序对残余应力的分布和幅值无较大影响。通过进一步对比分析各种装夹方案中残余应力引起的工件变形得出结论:夹具分布较平均的装夹方案可获得比较均布的残余应力和较小的变形。
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| 关 键 词： | 装夹 残余应力 优选 加工变形 |
| 文章编号： | 1000-6893(2003)04-0382-03 |
| 修稿时间： | 2002年10月9日 |
Finite Element Model for Optimal Clamping Scheme of Frame Shape Workpiece Based on Residual Stress Distribution |
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| DONG Hui yue ,KE Ying lin ,WU Qun ,XU De.Finite Element Model for Optimal Clamping Scheme of Frame Shape Workpiece Based on Residual Stress Distribution[J].Acta Aeronautica et Astronautica Sinica,2003,24(4):382-384. |
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| Authors: | DONG Hui yue KE Ying lin WU Qun XU De |
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| Institution: | DONG Hui yue 1,KE Ying lin 1,WU Qun 2,XU De 2 |
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| Abstract: | Uneven distribution of the residual stress is the main element to cause the deformation of a workpiece. To reflect the relationship between clamps and residual stress, finite element models with different clamping schemes were built and the clamping process was simulated. It is verified that clamping points have great effect on the residual stress, but that of the clamping order is little. In addition, workpiece distortion introduced by the residual stress is analyzed and compared under different clamping conditions. Finally, a conclusion is obtained: To reduce the workpiece deformation due to the residual stress, it is advisable to adopt even distributed clamps without regard to the clamping sequence. |
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| Keywords: | clamp residual stress optimal machining deformation |
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