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

In the process of CNC progressive forming hole-flanging, compared to the single pass forming strategy, adopting a multi pass forming scheme can achieve better forming quality. On the basis of three passes of CNC progressive forming, the article conducts a numerical simulation study on the forming quality of CNC progressive forming hole-flanging using three different forming angle combinations: incremental allocation, equal difference allocation, and decreasing allocation, using ANSYS finite element software. By analyzing the contour dimension accuracy, roundness and thickness distribution of the numerical simulation test pieces after flanging, the influence of different forming angle combinations on the forming quality of NC incremental forming hole-flanging was explored. The analysis results show that the combination forming scheme with three passes of decreasing distribution of forming angle spacing can obtain better contour dimension accuracy, roundness and thickness distribution, but the combination forming scheme with three passes of decreasing distribution of forming angle spacing can obtain lower protrusion of the pressing end.