【導讀】蔡恒光，廖浩欽，陳復國。進行了檢查，同時使用了實驗方法和有限元分析。四步工序沖壓工藝的開發(fā)，以。消在沖壓頂蓋的工藝的情況下產生裂縫和起皺缺陷。實際操作沖壓工藝與使用毫米厚的LZ91的空白。厚度分布在不同地點之間。的實驗數據和有限元計算結果吻合良好，證實了有限元分析的準確性和效率。LZ91板材在室溫成形性能優(yōu)越，也表明目前的筆記本頂蓋的成功制造研究。在EMI中由于重量輕，性能良好，在電子行業(yè)鎂合金已被廣泛用于結構部件，最近，鎂，鋰合金也已研制成功，以提高鎂合金的室溫成。求多操作，，克服這一問題。以確定是否斷裂將發(fā)生。這意味著斷裂問題非常嚴重，是只通過擴大在法蘭圓角半徑。型，鉸鏈法蘭的高度為5毫米。這意味著可避免斷裂缺損。和底部的鉸鏈法蘭斷裂問題，更好的形成過程仍有望解決鉸鏈法蘭起皺。由于側壁接近法蘭開放和圓角半徑大于所需的法蘭成功。在最終產品的角落的最小厚度為毫米，和所有株以上的成形極限圖。

　　

【正文】 wrinkle and (b) locations of thickness measured. View thumbnail images Table 1. Comparison of thickness measured A B C D Experiment mm mm mm mm Simulation mm mm mm mm Error % % % % 6. Concluding remarks The press forming of magnesium alloy sheets was studied in the present study using the experimental approach and the finite element analysis. The formability of both AZ31 and LZ sheets was examined first. The research results indicated that the LZ91 sheet has favorable formability at room temperature, which is similar to that of AZ31 sheet at the forming temperature of 200 176。C. 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 fouroperation process lends itself to an efficient approach to form the hinge in the notebook with fewer operational procedures than that required in the current practice. 14 It also confirms that the notebook cover cases can be produced with LZ91 magnesium alloy LZ91 sheet by the stamping process. It provides an alternative to the electronics industry in the application of magnesium alloys. Acknowledgments The authors would like to thank the National Science Council of the Republic of China for financially supporting this research under the Project No. NSC952622E002019CC3, which made this research possible. They would also like to thank ESI, France for the help in running the PAM_STAMP program. References 1. o Chen and Huang, 2020 o . Chen, . Huang o Formability of stamping magnesiumalloy AZ31 sheets o J. Mater. Process. Technol., 142 (2020), pp. 643–647 o 2. o Chen et al., 2020 o . Chen, . Huang, . Chang o Deep drawing of square cups with magnesium alloy AZ31 sheets o Int. J. Mach. Tools Manuf., 43 (2020), pp. 1553–1559 o 3. o Drozd et al., 2020 o Z. Drozd, Z. Trojanov225。, S. Kdela o Deformation of behavior of Mg–Li–Al alloy o J. Mater. Compd., 378 (2020), pp. 192–195 o 4. o Takuda et al., 1999a o H. Takuda, T. Yoshii, N. Hatta o Finiteelement analysis of the formability of a magnesiumbased alloy AZ31 sheet o J. Mater. Process. Technol., 89/90 (1999), pp. 135–140 o 15 5. o Takuda et al., 1999b o H. Takuda, S. Kikuchi, T. Tsukada, K. Kubota, N. Hatta o Effect of strain rate on deformation behavior of a Mg––1Zn alloy sheet at room temperature o Mater. Sci. Eng., 271 (1999), pp. 251–256 o Corresponding author. Copyright 169。 2020 Elsevier . All rights reserved. Related articles Tangential bending and stretching of thin ma... Materials amp。 Design Constitutive modeling for anisotropic/asymme... International Journal of Plasticity Improvement of ductility in magnesium alloy ... Materials Letters Simulation of magnesium alloy AZ31 sheet dur... Computational Materials Science Finite element simulation of magnesium alloy... Journal of Materials Processing Technology View more related articles Cited by (9) Quick gas blow forming behavior of AZ31B mag... Zhongguo Youse Jinshu Xuebao/Chinese Journal... Influence of cutting speed on flank temperat... Materials and Manufacturing Processes Influence of environmentally friendly electr... Zhongguo Youse Jinshu Xuebao/Chinese Journal... View details of all 9 citing articles in Scopus Provided by Scopus Related reference work articles . encyclopedias 16 Sintering: Modeling Encyclopedia of Materials: Science and Techn... Computational Modeling of Concrete St... Comprehensive Structural Integrity Finite Element Analysis in Bone Rese... Comprehensive Biomaterials Hard Tissues, Mechanical Properties of Encyclopedia of Materials: Science and Techn... NDT: Support by Modeling Encyclopedia of Materials: Science and Techn... More related reference work articles View Record in Scopus