Transactions of Materials and Heat Treatment

Title：Multi-objective optimization of forming process for large-scale Al alloy forging based on RSM

Authors： Yuan Hongling Wang Kesheng

Unit： Foshan Polytechnic Ningbo University of Technology

KeyWords： T-shaped Al alloy forging finite element simulation response surface method (RSM) multi-objective optimization

ClassificationCode：TG316

year,vol(issue):pagenumber：2014,39(6):151-156

Abstract：

Large-scale aluminum alloy forging being regarded as the object of study and using the strain uniformity and forging force of forging as the evaluation index, the orthogonal experiment and modelling analysis of response surface method were put forward and carried out, respectively, and the second order response surface model was obtained. The accurate model was verified by numerical simulation for the following optimization. The optimum parameters that flash tank height of 3.56 mm, forming temperature of 451 ℃, friction coefficient of 0.35 and forming speed of 10 mm·s-1 in feasible design space are obtained. The optimized process parameters were verified by Deform. The forming uniformity of forging is good after optimization, and the forging force is reduced effectively. The production practice of Al alloy forging was done based on the optimized results, which shows that the size and property of forging after multi-objective optimization are satisfied, and so does the forming force of equipment.

Funds：

浙江省自然科学基金资助项目(Y1111068)

Reference：

［1］孟毅. 大型铝合金锻件成形工艺数值模拟及优化[D]. 重庆: 重庆大学, 2009.Meng Yi. Numerical Simulation and Optimization of Large Al alloy Part Forging Process[D]. Chongqing: Chongqing University, 2009.
［2］邓磊.铝合金精锻成形的应用基础研究[D]. 武汉: 华中科技大学, 2011.Deng Lei. Applied Fundamental Study on Precision Forging of Aluminum Alloy [D]. Wuhan: Huazhong University of Science and Technology, 2011.
［3］Yanqiu Zhang, Debin Shan, Fuchang Xu. Flow lines control of disk structure with complex shape in isothermal precision forging[J].Journal of Materials Processing Technology, 2009, 209:745-753.
［4］Clark D A，Johonson W S. Temperatures effects on fatigue perform of cold expanded holes in 7050-T7451 aluminum alloy[J]. International Journal of Fatigue，2003，(25):159-165.
［5］吴新民.工字形截面模锻件改进低倍流线状态的途径[J].航空材料学报，2003，23（S1）：279.Wu Xinmin. Way to improve low-magnification flow line condition of I-shaped section die forgings [J]. Journal of Aeronautical Materials, 2003, 23(S1):279.
［6］刘维，吴建军，彭永前. 基于响应面模型的多工步成形零件优化设计[J]. 锻压技术，2011，36（1）：157-160.Liu Wei, Wu Jianjun, Peng Yongqian. Optimum design of mult-i step forming part based on response surface model[J]. Forging & Stamping Technology, 2011, 36(1):157-160.
［7］邓文卫，易幼平，湛利华，等.大型铝合金航空模锻件局部加载成形工艺研究[J].热加工工艺，2011，40(11): 29-32.Deng Wenwei, Yi Youping, Zhan Lihua, et al. Research on local loading process of large al-alloy air die forgings[J]. Hot Working Technology, 2011, 40(11):29-32.
［8］张云飞，王亮，赵晓东，等. Al-Zn-Mg-Cu高强铝合金多向自由锻数值模拟与实验研究[J]. 锻压技术，2013，38（4）：167-171.Zhang Yunfei, Wang Liang, Zhao Xiaodong, et al. Numerical simulation and experimental research on multi-directional free forging of Al-Zn-Mg-Cu high strength aluminum alloy [J]. Forging & Stamping Technology, 2013, 38(4):167-171.

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