Numerical investigation of tool parameter influence on the interlock forming during flat clinching process

Abstract

Tool parameters play a vital role in the mechanical interlock formation during the at clinching process, to understand the in uence of tool parameters on the interlock formation, the nite element software DEFORM-2D was used to build the numerical model of the at clinching process, and the numerical model was veri ed by the experiment. The in uences of the punch radius, punch llet radius, and blank holder radius on the interlock formation of the clinched joint were investigated using the numerical model. Then, the relationship between the punch radius and blank holder radius was studied. The results showed that the interlock gradually increases with the increase of the blank holder radius, after that, the interlock begins to decrease. To maximize the interlock, the punch radius and the blank holder radius should be increased simultaneously. It can be concluded that the blank holder radius and the punch radius should keep in a linear relationship when designing the geometric dimensions of the at clinch tools, which can promote the application of at clinching process in car body manufacturing.

Numerical simulation of the hybrid flat-clinching

“…The numerical simulation indicated significant impact of the punch corner radius and the blank holder corner radius on the interlocking whereas the other parameters had little influence, Al5052 was used in the experimental configuration. and the same for (Wang et al, 2023) who elaborated on the influence of geometric parameters as punch radius, punch fillet radius and blank holder radius on flat clinching process, by choosing Al5052 as material for the study. A numerical simulation of flat clinching was investigated by (Chen et al, 2017) using Al1060 as material for sheets and validated by experimental results, the study showed the influence of punch and holder force diameters on the behavior of the joint, the neck thickness and interlocking length increase by the increase in punch diameter and decrease by the increase in blank holder force.…”