The strength analysis in caulking fastening portion of automotive parts

摘要

In this study, we are focusing on the caulking for fixing the two metals. The method of fixing by plastically deforming the material is referred to as caulking fastening. This way, it is possible to low cost and shorten delivery time. However, since the weak rotational force at the junction, it has been reported that failure symptoms. Therefore, it is important to establish the strength evaluation method. So this time, we made a stress measurement of by the measurement and simulation of the slip torque in the two types of the miniature model and the full scale model. This model uses the shaft side and the ring side respectively FCD450, S45C tempering and quenching material. This analysis is intended to be to investigate the effect of the load applied in 1 second static structural analysis. Test in miniature model results showed a fixation for all interference. The results of shear stress, by tresca's theorem is shown that it's broken when fastening margin is 0.1 mm. Therefore, interference may be set to interference in the range of 0.1～0.05mm. This has been shown similar trend to full scale model.