| 变摩擦控制厚度分布的TC4深筒形件正反向超塑成形 |
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| 引用本文： | 蒋少松,张凯锋,吴海峰,许沂,雷鹍,王斌.变摩擦控制厚度分布的TC4深筒形件正反向超塑成形[J].航空材料学报,2008,28(6). |
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| 作者姓名： | 蒋少松 张凯锋 吴海峰 许沂 雷鹍 王斌 |
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| 作者单位： | 1. 哈尔滨工业大学材料科学与工程学院,哈尔滨,150001
2. 航天特种材料及工艺技术研究所,北京,100074 |
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| 摘 要： | 以正反向超塑成形厚度均匀的TC4钛合金深筒形件为背景,采用MARC有限元模拟分析了正反向超塑成形时预成形模和终成形模的表面摩擦系数对成形件壁厚分布的影响.结果表明:合理地增大预成形模的表面摩擦力能显著增加预成形的局部减薄作用,对于提高零件最终壁厚分布均匀性有利.同时,合理减小终成形模的摩擦力,可以使板料褴体变形均匀化,壁厚分布趋于均匀.根据模拟结果,采用机械加工方法增加预成形模表面粗糙度以增大摩擦力,在终成形模表面喷涂润滑剂以降低摩擦力,通过正反向超塑成形实验制得厚度分布在1.50～1.78mm范围内的航天用TC4钛合金深简形件,比普通正反向超塑成形件厚度分布(1.18～2.24mm)有了很大改善.
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| 关 键 词： | TC4钛合金 正反向超塑成形 厚度分布 摩擦 有限元模拟 |
Friction Changing to Control Thickness Distribution of TC4 Deep Cylinder by Direct-Reverse Superplastic Forming |
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| JIANG Shao-song,ZHANG Kai-feng,WU Hai-feng,XU Yi,LEI Kun,WANG Bin.Friction Changing to Control Thickness Distribution of TC4 Deep Cylinder by Direct-Reverse Superplastic Forming[J].Journal of Aeronautical Materials,2008,28(6). |
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| Authors: | JIANG Shao-song ZHANG Kai-feng WU Hai-feng XU Yi LEI Kun WANG Bin |
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| Institution: | JIANG Shao-song1,ZHANG Kai-feng1,WU Hai-feng2,XU Yi2,LEI Kun2,WANG Bin2(1.School of Material Science , Engineering,Harbin Institute of Technology,Harbin 150001,China,2.Institute of Aerospace special material , technology,Beijing 100074,China) |
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| Abstract: | Based on the direct-reverse superplastic forming TC4 deep cylinder,the influence to final thickness distribution of surface friction of preforming die and forming die was analysed with MSC.MARC.The results show that higher friction coefficient of preforming die can efficiently reduce the thickness of the regions which need to be thinned,resulting in a more uniform final thickness distribution along the component.Lower friction coefficient of forming die can make the sheet tend to integral formation,also res... |
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| Keywords: | TC4 titanium alloy direct-reverse superplastic forming thickness distribution friction FEM |
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