导航

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2017, Vol. 38 ›› Issue (5): 420669-420669.doi: 10.7527/S1000-6893.2016.0271

• Material Engineering and Vehicle Conceptual Design • Previous Articles    

Discharge current in self-excited electromagnetic riveting

DENG Jianghua, CHENG Li, WANG Linfeng   

  1. School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116, China
  • Received:2016-08-09 Revised:2016-09-05 Online:2017-05-15 Published:2016-10-24
  • Supported by:

    National Natural Science Foundation of China (50905032);Key Project of Provincial University Natural Foundation for Young Scholar of Fujian Provincial Department of Education (JZ160417)

Abstract:

Electromagnetic riveting is a riveting technology for transforming electromagnetic energy into mechanical energy. By traditional induction low voltage electromagnetic riveting, it is difficult to solve the problems of low energy efficiency, and riveting of high strength and large diameter rivet and hard forming material rivet. Based on self-excited electromagnetic riveting technology, the analysis model of discharge current is established. The feasibility of large diameter rivet forming is investigated by numerical analysis and process experiment. The results show that the model for discharge current analysis can realize the discharge current analysis of traditional induction and self-excited electromagnetic riveting. The analysis results are in good agreement with those of the experiment. When the discharge energy is the same, the eddy current repulsion peak of the self-excited electromagnetic riveting is much larger than that of the induction. The self-excited electromagnetic riveting can effectively improve the energy utilization rate, and is the effective way for the forming of large diameter rivets. When the discharge voltage is 320 V, self-excited electromagnetic riveting can deform the 45 steel rivet with 10 mm diameter, and the rivet deformation is carried out by adiabatic shearing.

Key words: electromagnetic riveting, self-excitation, discharge current, large diameter rivet, adiabatic shearing

CLC Number: