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.