锻压技术

基于克里金模型和遗传算法的楔横轧连杆毛坯优化

英文标题：Optimization on cross wedge rolling connecting rod blank based on Kriging model and genetic algorithm

作者：黄超群来飞

分类号：TG335

出版年,卷(期):页码：2020,45(8):99-105

摘要：

以DEFORM-3D数值模拟和遗传算法为手段，以连杆楔横轧制坯工艺作为研究对象，将展宽角、成形角、第一把楔的高度、初始坯料温度作为设计变量，将第一主应力作为优化目标，利用克里金模型构建设计变量和优化目标之间的映射关系，利用遗传算法对克里金模型进行全局寻优。得到了连杆毛坯楔横轧工艺的最优参数组合，即展宽角为32°、成形角为8.99°、第一把楔的高度为6.21 mm、初始坯料温度为1200 ℃。最后，将得到的最优工艺参数用于数值仿真和实验验证。结果表明，优化后的工艺参数使得中心区域最大第一主应力从77 MPa下降至35 MPa，并且消除了原有工艺毛坯中心区域出现的裂纹缺陷。

Using numerical simulation DEFORM-3D and genetic algorithm as the means, for the blank making process of cross wedge rolling for connecting rod, taking the widening angle, the forming angle, the height of the first wedge and the initial temperature of blank as the design variables and taking the first principal stress as the optimization goal, the mapping relationship between the design variables and the optimization goal was constructed by the Kriging model, and the Kriging model was optimized globally by the genetic algorithm. Then, the optimum parameter combination of the cross wedge rolling process for connecting rod blank was obtained with the widening angle of 32 °, the forming angle of 8.99 °, the height of the first wedge of 6.21 mm, and the initial temperature of blank of 1200 ℃ which were used in the numerical simulation and the experimental verification. The results show that the optimized process parameters reduce the maximum principal stress in the central area from 77 MPa to 35 MPa and eliminate the crack defects in the central area of blank by the original process.

基金项目：

重庆市教委科学技术研究项目资助（KJ1603809）; 重庆工商职业学院科研项目（ZD 2016-01）

黄超群(1981-),女,硕士,副教授，E-mail：hcq_ctbi@163.com

参考文献：

[1]赵新海,程联军,吴向红,等.国内连杆模锻加工技术的现状及发展[J].锻压装备与制造技术,2006, 41(1):15-17.
Zhao X H, Cheng L J, Wu X H, et al. Current research and progress of connecting rod die forging domestic[J]. China Metalforming Equipment & Manufacturing Technology, 2006, 41 (1):15-17.
[2]叶山益次郎.旋转锻造:第二部分[J].何宇中，译.钢铁译文集,1994, (1):30-48.
Yasujiro Yayama. Rotary Forging: Part II[J]. Translated by He Y Z. Gang Tie Yi Wen Ji, 1994，(1):30-48.
[3]郭长武, 奕瑰馥, 刘树枫.楔横轧——成形轴类件新工艺[J].金属成形工艺,1996,14(3):49-50.
Guo C W, Yi G F, Liu S F. Cross wedge rolling-New technology of forming shaft parts[J]. Metal Forming Technology, 1996, 14(3):49-50.
[4]路红岩,闫华军,张双杰,等.楔横轧多台阶轴轧齐曲线优化研究[J].锻压技术,2019,44(12):40-48.
Lu H Y, Yan H J, Zhang S J, et al. Research on optimization of rolling curve for multi-step shaft in cross wedge rolling[J]. Forging & Stamping Technology, 2019,44(12):40-48.
[5]Zhou X Y, Shao Z T, Catalin I Pruncu, et al. A study on central crack formation in cross wedge rolling[J]. Journal of Materials Processing Technology, 2020, 279: 116549.
[6]Pei L, Liu C, Shu X D. Study on formation mechanism of axle part in the new cross-wedge rolling process based on experiment and simulation[J]. Transactions of the Indian Institute of Metals,2019,72(12): 3305-3312.
[7]肖川, 周杰, 向东, 等. 楔横轧制坯工艺中堆料缺陷形成机理研究及对策[J]. 热加工工艺, 2011, 40(23):106-108.
Xiao C, Zhou J, Xiang D, et al. Research on forming mechanism and control methods for stacking defects in cross-wedge rolling[J]. Hot Working Technology,2011, 40(23):106-108.
[8]刘桂华,赵培峰,徐春国, 等.大变形量楔横轧成形过程中内部缺陷的预防[J].中国机械工程,2006，(S1):150-153.
Liu G H, Zhao P F, Xu C G, et al. A study on avoidance interior defects during cross wedge rolling process with large deformation[J]. China Mechanical Engineering, 2006，(S1):150-153.
[9]陶新刚. 基于损伤力学的楔横轧件内部损伤开裂的研究[D].北京：机械科学研究总院集团有限公司,2011.
Tao X G. Research of Damage and Fracture for Cross Wedge Rolling Based on Damage Mechanics[D]. Beijing: China Academy of Machinery Science and Technology Group Co., Ltd., 2011.
[10]Johnson W, Mamalis A G. A survey of some physical defects arising in metal working processes[A]. Proceedings of the 17th International MTDR Conference[C]. London, UK, 1977.
[11]Danno A, Awano T. Effect of rolling conditions on formation of central cavity in 2-roll cross rolling[J]. J. JSTP, 1976, 17: 117-124.
[12]Danno A, Tanaka T. Hot forming of stepped steel shafts by wedge rolling with three rolls[J]. Journal of Mechanical Working Technology, 1984, 9 (1): 21-35.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】