论文部分内容阅读
提高干涉螺栓安装质量是提高螺接接头连接效率的有效途径.为了提高钛合金干涉螺栓安装质量,建立钛合金干涉螺栓有限元动态安装模型,研究干涉量、摩擦因数和安装次数对接头安装质量的影响,并结合试验对安装模型进行验证.结果表明:应力波安装阻力小于强迫安装;1.0%干涉量下安装孔壁挤压不充分,2.0%干涉量时会引起孔壁划伤,1.5%干涉量下安装孔壁表面质量最优;1.0%和1.5%干涉量下安装阻力对摩擦因数不敏感,但干涉量增加到2.0%时,安装阻力和最大凸瘤高度随摩擦因数增大而显著增加;二次安装导致安装阻力和最大凸瘤高度大幅上升,安装孔壁形成明显层叠累积.综上所述,工程实践中推荐使用1.5%干涉量,以保证安装孔壁表面质量.为了提高经济效益,摩擦因数选择0.1~0.15,多次安装应避免使用.干涉量大于1.5%时,应通过多次铰孔、改善螺栓表面润滑效果等方法尽可能降低摩擦因数,进而有效减小安装阻力和最大凸瘤高度.
To improve the quality of the interference bolt installation is an effective way to improve the efficiency of screw joint connection.In order to improve the quality of titanium alloy interference bolt installation, the finite element dynamic installation model of titanium alloy interference bolt is established, and the influence of interference, friction coefficient and installation times on the joint installation quality The results show that the installation resistance of stress wave is less than that of forced installation, the hole wall is insufficiently compressed under 1.0% interference, the hole wall is scratched when 2.0% interference occurs, and the 1.5% interference However, the mounting resistance at 1.0% and 1.5% of the interference is insensitive to the friction factor, but the mounting resistance and the maximum height of the convex knob significantly increase with the increase of the friction coefficient when the interference increases to 2.0% ; Secondary installation lead to mounting resistance and the maximum height of the convex tumor increased significantly, the installation hole wall to form a significant cascade accumulation.In summary, the engineering practice recommended 1.5% interference in order to ensure the quality of the installation hole wall surface.In order to improve economic efficiency , The friction factor of 0.1 to 0.15, multiple installation should be avoided.If the interference is greater than 1.5%, should be reaming through several holes to improve the lubrication effect of the bolt surface to make You can reduce the friction coefficient, so as to effectively reduce the installation height of the resistance and the maximum convex tumors.