笔记本外壳镁合金冲压件模具设计[外文翻译].doc

笔记本外壳镁合金冲压件模具设计[外文翻译]

作者：Heng-Kuang Tsaia, Chien-Chin Liaoa and Fuh-Kuo Chen
台湾台北国立台湾大学机械工程学院

 
摘要
在本研究中，用冲压工艺在室温下制造笔记本电脑顶盖并运用实验法和有限元分析法等方法分析镁锂合金板材顶盖的受力情况。其中包括四种工艺过程，冲压工艺开发，以消除在冲压工艺中顶盖的断裂和起皱等缺陷。为了验证有限元分析，实际运作冲压工艺中使用0.6毫米厚的lz91，填补了这一空白。一个好的协议需要根据实验数据和有限元分析结果来保证精度和效率，因为在不同地方需要的厚度分布也不同。上级成形lz91板在室温下也表现在本研究中所成功制造的笔记本电脑顶盖的情况。由于运行过程本身能达到一个有效率的做法，以笔记本电脑形成铰链与人数较少的运作程序等在目前的方法中是必须的。它也证实了笔记本的封面案件，可以采用lz91镁合金薄板进行冲压等工艺。它提供了一个电子工业新型替代材料——镁合金。
关键词：
笔记本; LZ91镁锂合金板材料; 多工位级进模冲压工艺; 冲压成形
文章概要
1 ：导言
2 : 镁合金板材的机械性能
3 : 有限元模型分析
4 ：多工位级进模冲压工艺
4.1 ：二工位级进模冲压工艺
4.2 ：四工位级进模冲压工艺
5 ：实验验证
6 ：结束语
鸣谢

Die design  for  stamping  a notebook case with magnesium alloy sheets
Heng-Kuang Tsaia, Chien-Chin Liaoa and Fuh-Kuo Chen , a, 
aDepartment of Mechanical Engineering, National Taiwan University, Taipei, Taiwan, ROC

Available online 8 December 2007.
Abstract
In the present study, the  stamping  process for manufacturing a notebook top cover case with LZ91 magnesium–lithium alloy sheet at room temperature was examined using both the experimental approach and the finite element analysis. A four-operation  stamping  process was developed to eliminate both the fracture and wrinkle defects occurred in the  stamping  process of the top cover case. In order to validate the finite element analysis, an actual four-operation  stamping  process was conducted with the use of 0.6 mm thick LZ91 sheet as the blank. A good agreement in the thickness distribution at various locations between the experimental data and the finite element results confirmed the accuracy and efficiency of the finite element analysis. The superior formability of LZ91 sheet at room temperature was also demonstrated in the present study by successful manufacturing of the notebook top cover case. The proposed four-operation process lends itself to an efficient approach to form the hinge in the notebook with less number of operational procedures than that required in the current practice. It also confirms that the notebook cover cases can be produced with LZ91 magnesium alloy sheet by the  stamping  process. It provides an alternative to the electronics industry in the application of magnesium alloys.
Keywords: Notebook case; LZ91 magnesium–lithium alloy sheet; Multi-operation  stamping ; Formability
Article Outline
1. Introduction
2. Mechanical properties of magnesium alloy sheets
3. The finite element model
4. Multi-operation stamping process design
4.1. Two-operation stamping process
4.2. Four-operation stamping process
5. Experimental validation
6. Concluding remarks
Acknowledgements
References