螺栓根部圆角滚压的残余应力分布及参数优化研究  

Research on Residual Stress Distribution and Parameter Optimization After Rolling at Root Fillet of Bolt

作　　者：刘婧颖 李浩楠 徐昊 杨知硕 赵彦伟 白清顺[3] LIU Jingying;LI Haonan;XU Hao;YANG Zhishuo;ZHAO Yanwei;BAI Qingshun(Tianjin Key Laboratory of Fastening Technology,Tianjin 300300,China;Aerospace Precision Products Inc.,Ltd.,Tianjin 300300,China;Harbin Institute of Technology,Harbin 150001,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]哈尔滨工业大学,哈尔滨150001

出　　处：《航空制造技术》2024年第18期60-65,72,共7页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(52075129);天津市紧固连接技术企业重点实验室开放课题(TKLF2021–02–B–06)。

摘　　要：面向高精度钛合金螺栓滚压工艺参数选择的难题,建立了螺栓根部圆角滚压的有限元仿真模型,研究了螺栓根部圆角滚压后残余应力的分布规律,分析了滚压速度、滚压时间、摩擦系数、涂层厚度及滚压力对残余应力分布的影响,获得了优选的滚压工艺参数组合。同时,在仿真结果的基础上,以根部圆角滚压残余应力积分中值最小为目标,建立了滚压强化工艺参数及残余应力的优化数学模型,获得了优化后的高精度螺栓根部圆角滚压强化工艺参数,并进行了有限元仿真和试验验证。研究结果为高精度螺栓的圆角滚压强化工艺提供理论指导和技术支撑。Facing the issue of selecting rolling process parameter for high-precision titanium alloy bolts,the finite element simulation model is built for the rolling at root fillet of bolt.The distribution law of residual stress at root fillet of bolt after rolling is studied.The effects of rolling speed,processing time,friction coefficient,coating thickness and rolling force on the distribution of residual stress are analyzed and the optimal choice of rolling parameters is obtained.Moreover,targeting on the goal of minimizing the median integral of residual stress in root fillet rolling,the mathematical model of rolling parameters and residual stress is established in accordance with the simulation results.The optimal process parameters of rolling strengthening for the root fillet of high-precision bolt are obtained through parameter optimization.Moreover,the finite element simulation and experimental verification are carried out to validate the optimal results.The research results can offer theoretical guidance and technical support for the fillet rolling strengthening technology of highprecision bolts.

关 键 词：滚压强化 根部圆角 残余应力 参数优化 螺栓 

分 类 号：TG306[金属学及工艺—金属压力加工] V261[航空宇航科学与技术—航空宇航制造工程]