Formability in Biaxial Stretch of Aluminum Sheets and Foil with Very Small Punch

极小冲头铝板和铝箔双向拉伸的成形性

• 批准号: 05650132
• 负责人: KOBAYASHI Masanori
• 金额: $ 1.34万
• 依托单位: Toyota National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650132/
• 关键词: Plastic Working; Stretch Forming; Formability; Sheet Forming; Aluminum Foil; Copper Foil; Aluminum Sheet; 金属箔

The formability of Aluminum foil and Copper foil was investigated using semi-spherical punch which diameter were 4.0,7.5 and 40mm.The materials used are Aluminum sheet and foil Which are 0.2 and 0.02mm in thickness, and Copper foil which is 0.035mm in thickness. Moreover, Aluminum sheet which is 1.0mm in thickness and Phosphorus deoxidized copper sheet which is 0.6mm in thickness were used. All these materials were annealed.The PTFE (Polytetrafluoroethylene sheet, nominal thickness is 0.05mm) on which machine oil was dropped, Graphite grease and Machine oil Were used as the lubricants between blank and punch. The conclusions obtained are as follows.Increasing in thickness is improved the critical forming depth. This has already been reported. In this work, same consequence for 0.2 to 0.02mm in thickness were a also obtained. As a useful method to give same thickness effect, laminating method was proposed. In this case, the sheets laminated were same thicknesses or different ones or different material ones. The critical forming depth is also improved by laminating the two or more sheets. The critical forming depth is improved fairly by this method. It is noticed that the critical forming depth is largely affected in the thickness strain distribution.It is important to improve the critical forming depth that the thickness strain is distributed uniformly over the contact region between blank and punch.

使用半球面的打孔研究了铝箔和铜箔的可结合性，直径为4.0,7.5和40mm。所使用的材料是铝板和铝箔，厚度为0.2毫米和0.02mm，铜箔纸的厚度为0.035mm。此外，使用了厚度为1.0mm的铝板和厚度为0.6mm的磷酸化铜板。所有这些材料均已退火。PTFE（Polytetrafluoroethene板，标称厚度为0.05mm），在该PTFE上掉落机油，石墨油脂和机器油用作空白和打孔之间的润滑剂。获得的结论如下。厚度提高了临界形成深度。这已经报告了。在这项工作中，还获得了0.2至0.02mm厚度的后果。作为给出相同厚度效应的有用方法，提出了层压方法。在这种情况下，覆盖的床单是相同的厚度或不同的材料。通过层压两张或更多片，还可以改善临界形成深度。通过这种方法可以公平地改进临界形成深度。人们注意到，临界形成深度在厚度应变分布中受到很大的影响。对于改善厚度应变的临界形成深度很重要，即厚度应变在空白和打孔之间的接触区域均匀分布。

项目成果

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