扭力轴镦粗过程中压机速度对锻件质量的影响
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摘要
建立了扭力轴材料的本构关系模型。利用Deform-3D软件对扭力轴镦粗过程进行了有限元仿真,研究了在相同始锻温度下5种不同的压机速度对工件锻造质量的影响,并分析了相应工艺条件下工件的疲劳寿命。对各工艺条件下加工后的工件终锻温度、应力-应变场、损伤系数、金属流速场以及相应的疲劳寿命等进行了比较分析。结果表明,始锻温度为1200℃和压机速度为2.5 mm/s时,扭力轴的疲劳寿命最高。
The constitutive relation model of a torsion shaft material was established. Finite element simulation of the torsion shaft upsetting process was carried out by using Deform-3D software. The influence of five different press speeds on the forging quality of the workpiece at the same initial forging temperature was studied. The fatigue life of workpiece under the corresponding technological conditions was analyzed. The final forging temperature, stress-strain field, damage coefficient,metal velocity field and fatigue life of the workpiece processed under various technological conditions were compared and analyzed. The results show that the fatigue life of torsion shaft is the highest when the forging temperature is 1200℃ and the press speed of forging press is 2.5 mm/s.
The constitutive relation model of a torsion shaft material was established. Finite element simulation of the torsion shaft upsetting process was carried out by using Deform-3D software. The influence of five different press speeds on the forging quality of the workpiece at the same initial forging temperature was studied. The fatigue life of workpiece under the corresponding technological conditions was analyzed. The final forging temperature, stress-strain field, damage coefficient,metal velocity field and fatigue life of the workpiece processed under various technological conditions were compared and analyzed. The results show that the fatigue life of torsion shaft is the highest when the forging temperature is 1200℃ and the press speed of forging press is 2.5 mm/s.
引文
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[2]王玉龙.预扭处理对扭力轴扭转疲劳性能的影响[D].沈阳:东北大学,2014.
[3]程瑞敏.大型环件成形过程的数值模拟[D].秦皇岛:燕山大学,2009.
[4]苏海.纳米Al2O3p/2024铝基复合材料的制备及往复镦-挤变形研究[D].长沙:湖南大学,2012.
[5]陈振华,王金海,李林,等.纯镁粉末坯往复挤-镦的数值模拟及实验研究[J].湖南大学学报(自然科学版),2013(10):93-98.
[6]常妍妍.微型圆柱件镦粗变形规律数值模拟研究[D].哈尔滨:哈尔滨工业大学,2006.
[7]郑晓科.真实接触条件下的圆柱体镦粗力学特性研究[D].秦皇岛:燕山大学,2016.
[8]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(4):33-39.
[9]Chang Xuqing,Zhang Liyang,Yang Yongbiao,et al.Constitutive models for compressive deformation of AZ80magnesium alloy under multiple loading directions and strain rates[J].Journal of Iron and Steel Research International,2016,23(1):64-68.
[10]Tao Zhijun,Fan Xiaoguang,Yang He,et al.A modified Johnson-Cook model for NC warm bending of large diameter thin-walled Ti-6Al-4V tube in wide ranges of strain rates and temperatures[J].Transactions of Nonferrous Metals Society of China,2018(2):298-308.
[11]Bhattacharrya R,lan Y J,Wynne B P,et al.Constitutive equations of flow stress of magnesium AZ31 under dynamically recrystallizing conditions[J].Journal of Materials Processing Tech,2014,214:1408-1417.
[12]高慧峰,吕彩琴,刘思蓉,等.扭杆表面材料本构关系及滚压仿真分析研究[J].热加工工艺,2017,46(24):170-174.
[13]Haggag F M.In-situ ABI testing to determine yield strength,pipe grade,and fracture toughness of in-service oil and gas pipelines[J].Russian Oil and Gas Technology Magazine,2011,36:22-29.
[14]于鑫,孙杰,熊青春,等.7050-T7451铝合金铣削加工表面材料特性与本构关系模型的建立[J].中国有色金属学报,2015,25(11):2982-2989.
[15]胡建军,李小平.DEFORM-3D塑性成型CAE应用教程[M].北京:北京大学出版社,2011.
[16]刘陶,龙思远.基于DEFORM-3D的铝合金筒形件旋压成形过程数值模拟[J].特种铸造及有色合金,2010,30(6):508-510.
[17]刘百宣,孙红星,刘华,等.基于DEFORM-3D的汽车转向器输入轴锻造成形研究[J].热加工工艺,2012,41(9):129-131.