收口量对钛合金自锁螺母锁紧性能的影响

摘要

In order to insure the influence of crimping dimension on the locking properties of titanium alloy selflocking nut,the locking properties at different crimping dimension were detected by the machine in this paper,and the regularity between crimping dimension and locking properties was gained simultaneously.The results show that the selflocking torque and breakaway torque increase at beginning and then decrease with the increasing of frequency.The variant region was smaller at the 0.05mm and 0.10mm crimping dimension,and that at 0.15mm crimping dimension was biggest.The linear relationship appears between seating torque and preload,and the smaller crimping dimension is,the bigger slope of the linear is.The wrenching-stretching coefficient is 0.09,0.12 and 0.16 at the crimping dimension of 0.05mm,0.10mm and 0.15mm,respectively.%为了明确收口量对钛合金自锁螺母锁紧性能的影响,对不同收口量的钛合金自锁螺母的锁紧性能进行了检测和分析,得出了收口量对锁紧性能的影响规律.结果表明:随着拧入拧出次数的增加,锁紧力矩值和松脱力矩值呈现先增大后减小的趋势,收口量为0.05mm和0.10mm时,变化幅度较小,而收口量为0.15mm时,变化幅度最大;安装力矩与预紧力基本呈线性关系,收口量的大小决定了安装力矩与预紧力之间线性变化的斜率,收口量越小则线性关系的斜率越大;收口量为0.05mm、0.10mm和0.15mm时的扭拉系数K分别为0.09、0.12和0.16.