Transactions of Materials and Heat Treatment

Title：Simulation and optimization on hot upsetting of titanium alloy countersunk head bolts with stepped gear grooves

Authors： Zhang Xiaobin Wu Ang Shan Longlong Wu Linlang Yang Zhishuo Lin Lei Gao Chang Xu Hao Liu Sicheng

Unit： Tianjin Manufacturing Branch Aerospace Precision Co. Ltd. Tianjin Key Laboratory of Fastening Technology

KeyWords： countersunk head bolt pre-forming gear groove punching needle sleeve upsetting

ClassificationCode：TG312

year,vol(issue):pagenumber：2022,47(5):57-64

Abstract：

For the problem that the step fracture failure of punching needle sleeve was prone to occur during the hot upsetting process for titanium alloy 100° countersunk head bolt with stepped gear groove, and the Deform-3D finite element simulation optimization was carried out. Then, the stress condition during the final forming of fine blanking was improved by changing the structure of preformed blank in order to achieve the purpose of prolonging the service life of fine blanking die. The results show that changing the original forming scheme to the scheme with countersunk head and tapered hole can change the contact sequence between the material and the steps of punching needle sleeve during the final forming, reduce the contact time between the steps of punching needle sleeve and the material and its stress, and reduce the stress concentration area for the steps of punching needle sleeve. Through simulation, it is concluded that the optimal forming parameters of the optimized forming scheme are α=100°, d=Φ8.5 mm and β=140°. Finally, the parameters obtained from the simulation are adjusted according to the actual upsetting situation, and the adjusted optimal forming parameters are α=100°,d=Φ6.5 mm and β=140°. Under the above parameters, the better forming results are obtained, which proves the feasibility of the scheme.

Funds：

作者简介：张晓斌（1981-），男，学士，高级工程师，E-mail：942744995@qq.com；通信作者：吴昂（1994-），男，硕士，助理工程师，E-mail：wuang1040@163.com

Reference：

[1]赵满堂, 陶群南,陈永峰,等.非标异型紧固件ML08Al钢铆钉开裂原因分析和工艺改进[J].特殊钢,2021,42(3):39-41.

Zhao M T, Tao Q N, Chen Y F， et al. Cause analysis on cracking of ML08Al steel rivets for non-standard special-shaped fasteners and process improvement [J]. Special Steel, 2021,42(3):39-41.

[2]赵辉, 李旭.有限元分析在紧固件塑性成形领域中的应用[J].新技术新工艺,2015，(10):58-61.

Zhao H, Li X. Application of finite element analysis in the field of fasteners of plastic forming[J]. New Technology & New Process, 2015，(10):58-61.

[3]周渝庆, 张祥.机械紧固件用新型钛合金的锻造温度优化[J].锻压技术,2020,45(1):35-40.

Zhou Y Q, Zhang X. Optimization on forging temperature of new titanium alloys for mechanical fasteners[J]. Forging & Stamping Technology,2020,45(1):35-40.

[4]杨万博, 霍元明,何涛,等.TC16钛合金航空紧固件冷镦成形实验研究[J].塑性工程学报,2020,27(10):7-12.

Yang W B, Huo Y M, He T，et al.Experimental study on cold heading forming of TC16 titanium alloy aerospace fastener[J]. Journal of Plasticity Engineering, 2020,27(10):7-12.

[5]王越, 乔长帅,崔斯柳,等.高强度螺钉断裂原因分析[J].电机技术,2021，(2):30-32，38.

Wang Y, Qiao C S, Cui S L，et al. Analysis on fracture cause of the high-strength screw[J]. Electrical Machinery Technology,2021，(2):30-32，38.

[6]商国强, 王新南,费跃,等.TB8钛合金紧固件疲劳断裂分析[J].稀有金属,2016,40(7):640-646.

Shang G Q, Wang X N, Fei Y，et al. Analysis of fatigue and fracture of TB8 titanium alloy fasteners[J]. Chinese Journal of Rare Metals,2016,40(7):640-646.

[7]邓苓芳, 江秋芬,穆成富,等.变力冲量的几种计算方法[J].大学物理,2014,33(11):47-51.

Deng L F, Jiang Q F, Mu C F, et al. Impulse calculation of several kinds of variable forces[J]. College Physics, 2014,33(11):47-51.

[8]杨光, 邵帅,王超，等. 固溶温度对激光沉积制造Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V钛合金组织及力学行为影响[J].稀有金属,2021,45(3):264-271.

Yang G, Shao S, Wang C, et al. Microstructure and mechanical behavior of Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V titanium alloy fabricated by laser[J]. Chinese Journal of Rare Metals, 2021,45(3):264-271.

[9]黄小康, 晁特,管延锦.基于正交试验的冷轧钢管模具设计参数优化[J].锻压技术,2020,45(12):95-101.

Huang X K, Chao T, Guan Y J, et al. Optimization of design parameters of cold-rolled steel pipe die based on orthogonal test[J]. Forging & Stamping Technology, 2020,45(12):95-101.

[10]宗学文，张健，卢秉恒. Ti6Al4V在不同成形工艺下的数值分析及组织性能[J].稀有金属,2021,45(7):786-795.

Zong X W，Zhang J，Lu B H. Numerical analysis and microstructure and properties of Ti6Al4V under different forming processes[J]. Chinese Journal of Rare Metals,2021,45(7):786-795.

[11]刘俊英. 基于正交试验的车用螺母成形分析及模具磨损优化[J].锻压技术,2020,45(2):182-187，193.

Liu J Y. Forming analysis and die wear optimization of vehicle nut based on orthogonal test [J].Forging & Stamping Technology,2020,45(2):182-187，193.

[12]徐德衍. 铁道车辆热铆连接的有限元分析[J].锻压技术,2020,45(2):118-128.

Xu D Y. Finite element analysis of hot riveted connection of railway vehicles[J].Forging & Stamping Technology, 2020,45(2):118-128.

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