TC4自锁螺母三点收口成型工艺有限元仿真研究  

Finite Element Simulation of Three-point Necking Forming Process of TC4 Self-locking Nut

作　　者：齐增星 梁铖 吴同一 焦光明 张晓斌 王宝辉 张涛 黎向锋[3] QI Zengxing;LIANG Cheng;WU Tongyi;JIAO Guangming;ZHANG Xiaobin;WANG Baohui;ZHANG Tao;LI Xiangfeng(Tianjin Key Laboratory of Fastening Technology,Tianjin 300300,China;Aerospace Precision Products Co.,Ltd.,Tianjin 300300,China;College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;The Second Military Representative Office in Tianjin of The Military Representative Agency in Beijing of The Air Force Equipment Department,Tianjin 300300,China)

机构地区：[1]天津市紧固连接技术企业重点实验室,天津300300 [2]航天精工股份有限公司,天津300300 [3]南京航空航天大学机电学院,南京210016 [4]空军装备部驻北京地区军事代表局驻天津地区第二军事代表室,天津300300

出　　处：《机械科学与技术》2024年第12期2076-2082,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金联合基金项目(U20A20293);天津市紧固连接技术企业重点实验室项目(TKLF2021-02-B-02)。

摘　　要：针对TC4钛合金自锁螺母,利用ABAQUS有限元分析软件,采用单因素控制法开展了对不同收口量、收口区域高度及收口速度的有限元仿真数值模拟研究。基于采用的收口工艺,建立有限元仿真模型,介绍了自锁螺母的成型机理。根据仿真结果,观察其收口过程,分析收口过程中的内螺纹区域应力应变变化规律,对比不同组参数对仿真结果的影响。结果表明:在自锁螺母收口过程中,应在不出现裂纹的合理范围下,尽可能选取较大的收口量、收口区域高度与收口速度,从而增加内螺纹区域的变形量,增大锁紧力矩,提高产品质量和加工效率。Aiming at the TC4 titanium alloy self-locking nut,using ABAQUS and single factor control method,the finite element simulation at different necking volume,necking area height and necking speedare carried out.According to the necking in the enterprises at present,the finite element simulation model is established and the forming mechanism of self-locking nut is introduced.According to the simulation results,the necking processis observed,the changing law of stress and strain in the internal thread area in the neckingis analyzed.Meanwhile compared the effects of different groups of parameters on the simulation results.The results show that in the necking of the self-locking nut,the necking volume,necking area height and necking speed should be selected as large as possible without cracks,so as to increase the deformation of the internal thread area and the locking torque,improve product quality and processing efficiency.

关 键 词：TC4钛合金 自锁螺母 收口工艺 有限元仿真 

分 类 号：TH131.3[机械工程—机械制造及自动化]