锻压技术

车用扭杆端头镦粗模具结构损伤及寿命研究

英文标题：Research on structural damage and life of upsetting mold for vehicle torsion bar end

作者：吕彩琴王天骄李井吉居玉辉

分类号：TG316

出版年,卷(期):页码：2022,47(10):216-222

摘要：

车用扭杆端头镦粗时所用的模具，会对其变形进行约束和限制，恰当的模具设计不仅可以提高生产效率，而且可以改善扭杆端头的结构及力学性能，提高扭杆的使用寿命，从而减少企业的生产成本。建立了扭杆端头及镦粗模具的有限元模型，采用DEFORM-3D软件对有限元模型进行网格划分，并仿真整个镦粗过程，分析了不同模具结构形状和不同始锻温度下镦粗后的模具磨损、模具寿命、扭杆端头应力、扭杆端头金属材料流速及流线分布。结果表明：始锻温度为1250 ℃时，采用合理的模具结构进行镦粗，可以减小模具磨损、延长模具寿命，而且成形得到的扭杆端头的综合性能较好。

When the vehicle torsion bar end was upset, its deformation was restricted and limited by the used upsetting mold, and proper mold design can not only improve the production efficiency, but also improve the structure and mechanical properties of the torsion bar end, increase the service life of the torsion bar and reduce the production cost of enterprise. Therefore, the finite element models of the torsion bar end and the upsetting mold were established, which was meshed by software DEFORM-3D. Then, the entire upsetting process was simulated, and after upsetting under different mold structure shapes and different initial forging temperatures, the mold wear, the mold life, the stress of torsion bar end and the metal material flow rate and streamline distribution of torsion bar end were analyzed. The results show that at the initial forging temperature of 1250 ℃, the reasonable mold structure for upsetting can reduce the mold wear and prolong the mold life, and the comprehensive performance of the formed torsion bar end is better.

基金项目：

国家自然科学基金资助项目（51275489）

吕彩琴（1968-），女，博士，教授，E-mail：lvcaiqin@nuc.edu.cn

参考文献：

[1]马娟,解永春,张继玲,等.镦粗技术在双伸缩液压缸制造中的开发应用[J].机械工程师,2013,(7):182-184.

Ma J, Xie Y C, Zhang J L, et al. Development and application of upsetting technology in the manufacture of double telescopic hydraulic cylinders[J]. Mechanical Engineer, 2013, (7): 182- 184.

[2]韩风,胡强.基于上模芯优化的汽车轮毂热锻模具改进[J].热加工工艺,2020,49(15):93-95,99.

Han F, Hu Q. Improvement of hot forging die for automobile wheel hub based on optimization of upper die core [J]. Hot Working Technology, 2020, 49(15): 93-95,99.

[3]秦敏. 大型锻造过程接触摩擦机理及变化规律的研究[D].太原：太原科技大学,2008.

Qin M. Research of Friction Mechanism and Variation Law During Forming Process of Heavy Forging [D]. Taiyuan: Taiyuan University of Science and Technology, 2008.

[4]Niu Z Y, Cai Z Z, Zhu M Y. Effect of mold cavity design on the thermomechanical behavior of solidifying shell during microalloyed steel slab continuous casting[J]. Metallurgical and Materials Transactions, 2021, 52(3): 1556-1573.

[5]何志坚,周志雄,黄向明.45CrNiMoVA高速切削条件下本构关系建模技术研究[J].材料科学与工艺,2016,24(4): 33-39.

He Z J, Zhou Z X, Huang X M. Study on the constitutive relation modeling technology of 45CrNiMoVA for high speed machining [J]. Materials Science and Technology, 2016, 24(4): 33-39.

[6]吕彩琴,李井吉,秦志远,等.车用扭杆端头镦粗工艺参数对其表面损伤的影响[J].锻压技术,2020,45(4):14-20.

Lyu C Q, Li J J, Qin Z Y, et al. Influence of upsetting process parameters on surface damage for torsion bar end in vehicle [J]. Forging & Stamping Technology, 2020, 45(4): 14-20.

[7]Anwar Khalil Sheikh, Muhammad Azhar Ali Khan. Mold design optimization and quality assessment of steel castings through integrated simulations and experiments[J]. Journal of Mechanical Science and Technology,2020,34(7):2975-2983.

[8]吴远志,严红革,刘先兰,等.ZK60镁合金高应变速率锻造成形[J].哈尔滨工程大学学报,2017,38(3):478-483.

Wu Y Z, Yan H G, Liu X L, et al. Investigation of the high-strain-rate forging of ZK60 magnesium alloy [J]. Journal of Harbin Engineering University, 2017, 38(3): 478-483.

[9]王磊,杨启正,张如华.基于DeForm的板条冲压扭曲成形数值模拟[J].模具工业,2021,47(6):10-15.

Wang L, Yang Q Z, Zhang R H. Numerical simulation of stamping distortion forming for strip based on DeForm [J]. Die & Mould Industry, 2021, 47(6): 10-15.

[10]吕彩琴,秦志远,杨忠林,等.扭力轴镦粗过程中压机速度对锻件质量的影响[J].热加工工艺,2019,48(3):159-162,166.

Lyu C Q, Qin Z Y, Yang Z L, et al. Effect of press speed on forging quality during torsion shaft upsetting process [J]. Hot Working Technology, 2019, 48(3): 159-162,166.

[11]杨红超,淳道勇,和永岗,等.GH4169合金叶片挤杆工序模具磨损及寿命的数值模拟分析[J].锻压技术,2021,46(3): 198-207.

Yang H C, Chun D Y, He Y G, et al. Numerical simulation analysis on wear and life of mold in bar extrusion process for GH4169 alloy blade [J]. Forging & Stamping Technology, 2021, 46(3): 198-207.

[12]Nabago Tomasz, Jurkiewicz Andrzej, Kowal Janusz. Modeling verification of an advanced torsional spring for tracked vehicle suspension in 2S1 vehicle model[J]. Engineering Structures,2021,229: 111623.

[13]蒋冒生，熊员允，张鼎新.模具材料及使用寿命[M].南昌: 江西省人民出版社, 1982.

Jiang M S, Xiong Y Y, Zhang D X. Mold Material and Service Life [M].Nanchang: Jiangxi Provincial People′s Publishing House, 1982.

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