叠层构件制孔容易生成层间毛刺，严重影响加工质量和效率。为了探究层间毛刺生成过程，预测毛刺高度，提出有效控制层间毛刺的工艺方法，该文首先通过实验建立钻削轴向力经验公式，然后采用有限元方法计算单层板在理论钻削力下的变形量，进而预测层间毛刺生成初始位置，最后运用能量法建立叠层钻削层间毛刺高度理论模型。应用硬质合金麻花钻在铝合金叠层试件上开展钻削实验，结果表明：理论模型能够有效地预测层间毛刺高度，揭示进给量和层间间隙对层间毛刺的影响规律，有助于优化叠层钻削工艺参数。
Abstract
The drilling of stacked components tends to form interlayer burrs, which reduce machining quality and the production efficiency. This study analyzes the formation and height of interlayer burrs and presents an effective processing method to control interlayer burrs. An empirical formula was developed for the thrust force during drilling for an finite element analysis (FEA) model of the drilling process to product the single plate deformations and to find the initial burr formation position. Then, the energy method is used in a mechanical model to product the interlayer burr height. The predictions agree well with drilling experiments with stacked aluminum plates and a carbide drill. The results show the effects of the feed rate and the interlayer gap on the interlayer burr formation to optimize the processing parameters of stacked components.
关键词
叠层构件 /
钻削 /
层间毛刺 /
层间间隙
Key words
stacked component /
drilling /
interlayer burr /
interlayer gap
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参考文献
[1] Zitoune R, Krishnaraj V, Collombet F, et al. Experimental and numerical analysis on drilling of carbon fibre reinforced plastic and aluminium stacks[J]. Composite Structures, 2016, 146:148-158. [2] GAO Yuhao, WU Dan, NAN Chenggen, et al. The interlayer gap and non-coaxiality in stack drilling[J]. International Journal of Machine Tools and Manufacture, 2015, 99:68-76. [3] Hellstern C. Investigation of Interlayer Burr Formation in the Drilling of Stacked Aluminum Sheets[D]. Atlanta:Georgia Institute of Technology, 2009. [4] BU Yin, TIAN Wei, LIAO Wenhe, et al. Investigation of correlation between interlayer gap and burr height in drilling of stacked Al-7475 materials[J]. Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture, 2015. [5] TIAN Wei, HU Jian, LIAO Wenhe, et al. Formation of interlayer gap and control of interlayer burr in dry drilling of stacked aluminum alloy plates[J]. Chinese Journal of Aeronautics, 2016, 29(1):283-291. [6] Choi J, Min S, Dornfeld D A. Finite element modeling of burr formation in drilling of a multi-layered material[J]. Escholarship University of California, 2004. [7] BI Shusheng, LIANG Jie. Experimental studies and optimization of process parameters for burrs in dry drilling of stacked metal materials[J]. The International Journal of Advanced Manufacturing Technology, 2011, 53(9-12):867-876. [8] LIANG Jie. The formation and effect of interlayer gap in dry drilling of stacked metal materials[J]. The International Journal of Advanced Manufacturing Technology, 2013, 69(5-8):1263-1272. [9] Gillespie L K. Burrs Produced by Drilling[R]. Kansas City:Bendix Corp, 1976. [10] Flachs J R. Force Modeling in Drilling with Application to Burr Minimization[D]. Atlanta:Georgia Institute of Technology, 2011. [11] Rahme P, Landon Y, Lachaud F, et al. Delamination-free drilling of thick composite materials[J]. Composites Part A:Applied Science and Manufacturing, 2015, 72:148-159. [12] 薛少丁. 柔性自动化单向压紧制孔技术研究[D]. 南京:南京航空航天大学, 2012.XUE Shaoding. Study on Technology of One-side Pressure for the Flexible Automated Drilling[D]. Nanjing:Nanjing University of Aeronautics and Astronautics, 2012. (in Chinese) [13] Ngoi B K A, Lim L E N, Ang P S, et al. Assembly tolerance stack analysis for geometric characteristics in form control-the "Catena" method[J]. International Journal of Advanced Manufacturing Technology, 1999, 15(4):292-298. [14] Kim J, Dornfeld D A. Development of an analytical model for drilling burr formation in ductile materials[J]. Journal of Engineering Materials & Technology, 2002, 124(2):192-198.
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