Finite element analysis of material flow in flat-rivet clinching process

For the past few years, the lightweight structure has been studying detailly due to the increasingly stringent requirements of environmental protection, energy conservation, and emission reduction. The main measure to realize automobile lightweight is to adopt parts manufactured by lightweight materials. To connect these lightweight materials, a new technology named flat-rivet clinching process (FRCP) has been developed. In this study, the impact of friction coefficient and specimen material on material flow was investigated utilizing the finite element method (FEM). The FE model was established utilizing DEFORM-2D software. AA5052 was selected as the main specimen material in this study. The equivalent stress and strain distribution, material flow velocity, and material flow direction were analyzed utilizing FEM. The consequences showed that except friction coefficient of the contact region between the upper plate and blank holder, the friction coefficient of other contact surfaces played a crucial role during the material flow. It could affect the formation of mechanical interlocking. Meanwhile, the higher the sheet strength and material flow resistance, the greater the riveting force required by the flat-rivet clinching process (FRCP).

Automated summary

In recent years, with the increasing requirements for environmental protection, energy conservation, and emission reduction, the study of lightweight structures has become more detailed. The use of lightweight materials manufactured parts is the main measure to achieve automobile lightweight. A new technology called flat-rivet clinching process (FRCP) has been developed to connect these lightweight materials. The study found that friction coefficient and material characteristics have a significant impact on material flow during the flat-rivet clinching process.