Effects of superimposed high-frequency vibration on deformation of aluminum in micro/meso-scale upsetting
Effects of superimposed high-frequency vibration on deformation of aluminum in micro/meso-scale upsetting
复制标题
叠加高频振动对铝微细尺度镦粗变形的影响
DOI：
10.1016/j.jmatprotec.2011.10.017
复制
发表时间：
2012-03
影响因子：
6.3
通讯作者：
Zichen Chen
中科院分区：
文献类型：
--
作者：
Zhehe Yao;Gap-Yong Kim;Leann Faidley;Qingze Zou;Deqing Mei;Zichen Chen
微/细观成形是一种具有经济竞争力的微型金属零件制造工艺。然而，当按比例缩小工艺时观察到的尺寸效应导致了诸如界面处的摩擦学问题和由于局部应力集中区域而导致的过早工具磨损等挑战。本文研究了高频振动辅助下的微/细观复合成形及其机理。通过振动辅助镦粗实验，分析和讨论了高频振动对提高表面光洁度、降低模具-试样界面摩擦力和降低成形应力的作用。此外，进行有限元分析，以帮助理解振动的意义。结果表明，在9.3kHz的横向振动下，凸模/试件表面粗糙度Ra从1.5μm降低到0.9μm，凸模/试件界面摩擦系数从0.14降低到0.07，成形应力降低近50%。本研究结果证实了高频振动应用于金属材料微/细观成形的显著益处，并为理解振动辅助成形的潜在机理提供了基础。
Micro/meso forming is an economically competitive process for the fabrication of miniature metallic parts. However, the size effects observed when scaling down the process leads to challenges such as tribological problems at the interface and premature tool wear due to localized stress concentration regions. In this study, a hybrid micro/meso forming assisted by high-frequency vibration and the contributing mechanisms of the high-frequency vibration were investigated. The effects of high-frequency vibration on the improvement of surface finish, decrease of the friction at the die–specimen interface, and reduction of forming stress were analyzed and discussed based on the vibration-assisted upsetting experiments. In addition, finite element analysis was conducted to help understand the significance of the vibration. Results show that a transverse vibration of 9.3kHz led to surface roughness (Ra) reduction from 1.5μm to 0.9μm at the top surface, friction coefficient decrease from 0.14 to 0.07 at the punch/specimen interface, and nearly 50% reduction in the forming stress. The findings of this study confirmed the significant benefits of high-frequency vibration applied in micro/meso forming of metallic materials and provided a basis to understand the underlying mechanisms of vibration-assisted forming.
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DOI：
10.4028/www.scientific.net/msf.440-441.389
发表时间：
2003-09
期刊：
Materials Science Forum
影响因子：
--
作者：
Zhiyi Huang;M. Lucas;M. Adams
通讯作者：
Zhiyi Huang;M. Lucas;M. Adams
DOI：
--
发表时间：
1984-08
期刊：
--
影响因子：
--
作者：
J. Hatch
通讯作者：
J. Hatch
DOI：
10.1115/1.2386207
发表时间：
2007-08-01
影响因子：
4
作者：
Krishnan, Neil;Cao, Jian;Dohda, Kuniaki
通讯作者：
Dohda, Kuniaki
DOI：
10.1119/1.1932798
发表时间：
1950
期刊：
--
影响因子：
--
作者：
L. E. Kinsler;A. R. Frey
通讯作者：
L. E. Kinsler;A. R. Frey
DOI：
10.1016/j.jmatprotec.2006.12.032
发表时间：
2007-05-07
影响因子：
6.3
作者：
Daud, Yusof;Lucas, Margaret;Huang, Zhihong
通讯作者：
Huang, Zhihong