锻压技术

铝合金轮毂等温锻造成形中不均匀润滑的数值模拟和实验分析

英文标题：Numerical simulation and experimental analysis of uniform lubrication in isothermal die forging of aluminum alloy wheels

作者：叶升平陈康华陈送义

单位：中南大学

关键词：轮毂等温锻造不均匀润滑有限体积法

分类号：TG312

出版年,卷(期):页码：2014,39(2):6-11

摘要：

通过采用有限体积法(FVM),在MSC.Superforge有限元商业软件上实现了铝合金轮毂等温模锻成形的数值模拟，并进行了铝合金轮毂等温模锻成形实验。研究发现，轮毂锻件成形规律在数值模拟与实验中不一致，将数值模拟与实验进行分析可知, 模拟实验中加强筋上对应的轮缘为凹形，即加强筋上方金属晚于其他区域成形；而实际实验中加强筋上对应的轮缘为凸形，即加强筋上方金属早于其他区域成形。在计算机上获得了锻件与模具接触判定和潜在润滑凹槽值,可以推断轮毂成形过程中，加强筋处未充满的间隙形成封闭腔室，受到成形金属的排斥作用，润滑剂更易向加强筋流动，造成了数值模拟与实验中金属流动规律的差异。

The finite volume method (FVM) was used for numerical simulation of isothermal forging process of aluminum alloy wheels in commercial software MSC.Superforge, and the physical forming experiment was performed. Study releases that the forging laws in numerical simulation and physical experiment are inconsistent. According to the analysis of numerical simulation and physical experiment, it shows that the rim corresponding to stiffener is concave in numerical simulation, namely forming of rib area is later than other regions,while, the rim corresponding to stiffener is convex in physical experiment, namely forming of rib area is faster than other regions. According to the die contact and possible lubricant pockets obtained by the numerical simulation, the enclosed chamber formed in underfill gap of reinforcing rib was deduced in the wheel molding process which leads to repulsion by forming metal and more easily flow to stiffener for lubricant, so it brings about the difference of metal flow between numerical simulation and actual experiment.

基金项目：

国家973基础研究计划资助项目(2010CB731701,2012CB619502)

叶升平（1988-），男，硕士研究生

参考文献：

［1］李伟华，董选普，陈晓君，等. 铝合金热模锻润滑机理研究与应用[J]. 锻压技术，2010，35(3)：128-131.Li Weihua, Dong Xuanpu, Chen Xiaojun, et al. Research and application of lubrication mechanism for aluminum alloy hot die forging [J]. Forging & Stamping Technology，2010，35(3):128-131.
［2］Reto Grüebler, Heiko Sprenger, Josef Reissner. Tribological system modelling and simulation in metal forming processes[J]. Journal of Materials Processing Technology，2000，103(1):80-86.
［3］Jeonga D J, Kima D J, Kima J H, et al. Effects of surface treatments and lubricants for warm forging die life [J]. Journal of Materials Processing Technology，2001,113(1-3):544-550.
［4］Hiroyuki Saiki, Zhi Hongzhan, Liqunruan, et al. Evaluation of contact conditions in hot forging of pure aluminum using ultrasonic examination[J]. Journal of Materials Processing Technology，2006，177(1-3):243-246.
［5］彭颖红,彭大暑,左铁镛. CONFORM连续挤压变形过程的刚粘塑性有限元模拟[J]. 中国有色金属学报，1993,3(4)：42-47.   Peng Yinghong, Peng Dashu, Zuo Tieyong. Rigid viscoplastic finite element simulation of the CONFORM continuous extrusion deformation process [J]. Chinese Journal of Nonferrous Metals，1993,3(4): 42-47.
［6］Bailey C, Cross M A. Finite volume procedure to solve elastic solid mechanics problems in three-dimensions on an unstructured mesh[J]. International Journal for Numerical Methods in Engineering，1995，(2):76-82.
［7］梅瑞斌，齐广霞，包立，等. In718合金杯形件等温挤压成形数值模拟[J]. 热加工工艺， 2005，34(4)：50-52.Mei Ruibin, Qi Guangxia, Bao Li, et al. Numerical simulation of Inconel 718 alloy cup during isothermal extrusion [J]. Thermal Processing，2005，34(4):50-52.
［8］胡建军,许洪斌,金艳.塑性成形数值仿真精度的提高途径[J]. 锻压技术,2009，34(2)：149-153.   Hu Jianjun, Xu Hongbin, Jin Yan. Approach for increasing precision of numerical simulation of plastic forming [J]. Forging & Stamping Technology, 2009,34(2):149-153.
［9］韩小峰，郭成，邢光汉，等. 基于MSC.Superform的圆截面轧扁三维轧制数值模拟[J]. 锻压技术, 2013 ,38(1)：73-75.Han Xiaofeng, Guo Cheng, Xing Guanghan, et al. 3D rolling numerical simulation of circle section being rolled to flat based on MSC.Superform[J]. Forging & Stamping Technology, 2013，38(1):73-75.
［10］Bayramoglu M. Polat H,Geren N. Cost and performance evaluation of different surface treated dies for hot forging process [J]. Original Research Article Journal of Materials Processing Technology，2008，205(1-3):394-403.
［11］刘显东，张永安，李锡武，等. B95оч铝合金的热变形行为研究[J]. 稀有金属,2012, 36(5)：687-693.   Liu Xiandong, Zhang Yong'an, Li Xiwu, et al. Hot deformation behavior of B95оч aluminum alloy[J]. Chinese Journal of Rare Metals，2012，36(5):687-693.
［12］Wang Sujuan, Mi Xujun, Yin Xiangqian, et al. Deformation behavior of TiNiFe alloy in isothermal compression[J]. Rare Metals, 2012，31(5):415-419.

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