The influence of extrusion angle on the quality of hole-flanging forming

In the process of three-axis single pass progressive forming of hole-flanging, severe thickness reduction often occurs on the side wall. Based on the five axis single pass progressive forming, this paper changes the extrusion angle during the process of hole-flanging, and uses ANSYS finite element software to conduct numerical simulation research on the forming process of CNC progressive forming of hole-flanging with different extrusion angles. The influence of different extrusion angles on the forming quality of NC incremental forming hole-flanging was explored by comparing and analyzing the numerical simulation contour dimension accuracy, roundness and thickness distribution after flanging. The results show that when the extrusion angle is larger, the contour curve fitting degree is higher, the pressing end bulge height is smaller, the roundness is better, the thickness distribution is more uniform, and the forming quality is higher.