Transactions of Materials and Heat Treatment

Title：Stamping process of aluminum alloy folded core structure

Authors： Duan Chunzheng Xu Zhen

Unit： Dalian University of Technology

KeyWords： aluminum alloy folded core structure stamping process stamping speed

ClassificationCode：TG386

year,vol(issue):pagenumber：2015,40(9):21-26

Abstract：

Folded core structure of aluminum ally is of good energy absorption ability and can be designed flexibly. However, the difficulty in forming of aluminum alloy folded core structure limits its application and development. To find a simple and efficient forming method, the stamping processes of aluminum alloy 5052, 6061 and 7075 folded core structure were studied experimentally. And the influences of different factors such as material properties, sheet thickness, stamping speed and initial temperature of sheet on the forming process were discussed. The results show that in cold stamping process, the slow stamping velocity results in less thinning rate at danger point, while in hot stamping process both too fast and too slow stamping speeds are not fit for forming folded core structure. Furthermore, the increase of initial temperature of aluminum sheet can modify the quality of forming.

Funds：

段春争（1970-），男，博士，副教授，博导

Reference：

［1］Heimbs S, Cichosz J, Klaus M, et al. Sandwich structures with textile-reinforced composite foldcores under impact loads[J]. Composite Structures, 2010, 92(6):1485-1497.
［2］王志瑾, Khaliulin VI, Skripkin E, 皱褶结构芯格构型的几何设计方法[J]. 南京航空航天大学报,2002,34(1): 6-11.Wang Z J, Khaliulin V I, Skripkin E. Geometry design method of folded structure[J]. Transactions of Nanjing University of Aero-nautics & Astronau, 2002, 34(1):6-11.
［3］Gattas J M, Wu W, You Z, Miura-base rigid origami: Parameterizations of first-level derivative and piecewise geometries[J]. Journal of Mechanical Design, 2013, 135(11): 111011-1-111011-6.
［4］Heimbs S, Middendorf P, Kilchert S, et al. Experimental and numerical analysis of composite folded sandwich core structures under compression[J]. Applied Composite Materials, 2007, 14(5-6): 363-377.
［5］Heimbs S, Middendorf P, Hampf C, et al. Aircraft sandwich structures with folded core under impact load[A]. Proc. of the 8th International Conference on Sandwich Structures[C]. Porto, Portugal,2008.
［6］Heimbs S, Cichosz J, Kilchert S, et al. Sandwich panels with cellular cores made of folded composite material: Mechanical behavior and impact performance[A].17th International Conference on Composite Materials, ICCM-17[C]. Edinburgh, UK, 2009.
［7］Fischer S, Heimbs S, Kilchert S, et al. Sandwich structures with folded core: manufacturing and mechanical behavior[A]. SAMPE Europe International Conference[C]. Paris, France, 2009.
［8］Khaliulin VI, Dvoyeglazov I V. On technological problems of fabrication of relief designs by isometric transformations of thin sheet[J]. Transactions of Nanjing University of Aeronautics and Astronautics, 2001, 18(1):11-16.
［9］Kehrle, R. Method and apparatus for producing a composite structural panel with a folded material core:US, 6913570[P]. 2005-07-05.
［10］Endres G C, Weber H J. Method of producing a folded honeycomb structure for a sandwich component and foldable sheet-like material:US:7850896[P]. 2010-12-14.
［11］Schenk M, Allwood J M, Guest S D. Cold gas-pressure folding of miura-ori sheets[A]. 10th International Conference on Technology of Plasticity, ICTP [C].Aachen, Germany, 2011.
［12］Elsayed E A, Basily B B. A continuous folding process for sheet materials[A]. International Journal of Materials and Product Technology[C]. Blacksburg, USA, 2004.
［13］Basily B B, Elsayed E A. Dynamic axial crushing of multi-layer core structures of folded chevron patterns[A]. IIE Annual Conference and Exhibition[C]. Houston, USA, 2004.
［14］刘合军, 郎利辉, 李涛. 铝合金板材温热成形性能[J]. 塑性工程学报, 2009, 16(3): 145-148.Liu H J, Lang L H, Li T. Investigation of formability of aluminum alloy sheet at elevated temperature[J]. Journal of Plasticity Engineering, 2009, 16(3): 145-148.
［15］林钧品, 程荆卫. Al-2Mg 合金的动态再结晶[J]. 中国有色金属学报, 1999, 9(3): 510-514.Lin J P, Cheng J W. Dynamic recrystallization during hot torsion of Al-2Mg alloy[J]. The Chinese Journal of Nonferrous Metals, 1999, 9(3): 510-514.

Service：

【This site has not yet opened Download Service】【Add Favorite】