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高锁螺栓干涉配合安装工艺参数对凸瘤的影响分析

姜杰凤1,2, 董辉跃1, 毕运波1   

  1. 1. 浙江大学 机械工程学系, 浙江 杭州 310027;
    2. 杭州师范大学 钱江学院, 浙江 杭州 310012
  • 收稿日期:2012-05-21 修回日期:2012-08-21 出版日期:2013-04-25 发布日期:2013-04-23
  • 通讯作者: 董辉跃,Tel.: 0571-87953929 E-mail: donghuiyue@zju.edu.cn E-mail:donghuiyue@zju.edu.cn
  • 作者简介:姜杰凤 男, 博士研究生, 讲师。主要研究方向: 飞机装配与先进连接技术。 Tel: 0571-87953930 E-mail: jiang19jie81@zju.edu.cn;董辉跃 男, 博士, 副研究员。主要研究方向: 航空材料加工, CAD/CAE/CAM, 飞机数字化装配技术。 Tel: 0571-87953929 E-mail: donghuiyue@zju.edu.cn;毕运波 男, 博士, 副教授。主要研究方向: 加工过程动态物理仿真, CAD/CAE/CAM, 飞机数字化装配技术。 Tel: 0571-87953929 E-mail: zjubyb@zju.edu.cn
  • 基金资助:

    国家自然科学基金(51275463);浙江省自然科学基金(Y1090572);中央高校基本科研业务费专项资金(2011FZA4002)

Analysis of Process Parameters Influencing Protuberance During Interference Fit Installation of Hi-lock Bolts

JIANG Jiefeng1,2, DONG Huiyue1, BI Yunbo1   

  1. 1. Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China;
    2. Qianjiang College, Hangzhou Normal University, Hangzhou 310012, China
  • Received:2012-05-21 Revised:2012-08-21 Online:2013-04-25 Published:2013-04-23
  • Supported by:

    National Natural Science Foundation of China (51275463); Natural Science Foundation of Zhejiang Province (Y1090572); Fundamental Research Funds for the Central Universities of China (2011FZA4002) *Corresponding author. Tel.: 0571-87953929 E-mail: donghuiyue@zju.edu.cn

摘要:

干涉配合螺栓连接是提高飞机结构疲劳寿命的一种有效方法,干涉安装中产生的凸瘤对结构强度极为不利。分析了凸瘤产生的原因,对M8钛合金高锁螺栓进行了静态压入试验,同时建立了有限元模型进行数值模拟,通过对比压入力和凸瘤大小,验证了有限元模型。对影响凸瘤产生的工艺参数进行了分析。有限元模拟结果表明:最佳干涉量为1.5%,顶铁中孔直径略小于螺栓2倍时产生的凸瘤较小,钉孔间摩擦因数须小于0.15,孔出口0.2×120°倒角可减小凸瘤和降低此处的应力集中效应。

关键词: 高锁螺栓, 干涉配合, 凸瘤, 有限元法, 应力集中, 中孔顶铁

Abstract:

Interference fit is an effective process method for improving the fatigue life of bolted joints, but the protuberance produced in installation is harmful to the strength of joints. The causes of protuberance arising are analysised, and then reports a squeezing installation test of titanium alloy M8 hi-lock bolts. A finite element model (FEM) is developed and the process of installation is simulated. The experimental squeezing force and protuberance sizes are compared with the results from finite element analysis (FEA) to validate the FEM. Several process parameters are analyzed. The FEA results indicate that the best interference fit size is 1.5%,when the diameter of the bucking bar central hole is slightly smaller than twice the bolt diameter, the protuberance is relatively small. The friction coefficient should be less than 0.15, and 0.2×120°chamfer around the hole exit side can reduce protuberance and stress concentration.

Key words: hi-lock bolt, interference fit, protuberance, finite element method, stress concentration, bucking bar with central hole

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