Effects of process parameters on wall distribution homogeneity during hot power backward spinning for 7075 cast aluminium alloy tube

To obtain the effects of parameters on wall distribution homogeneity of 7075 cast aluminium alloy tube in hot power backward spinning accurately, a new method to accurately describe the wall-nonuniformity of the tube has been proposed. Combined with FE analysis, the change regularities of the wall-nonuniformity with the process parameters varying were obtained. The results show that wall-nonuniformity first increases slightly, and then decreases with the increase of preheating temperature. With roller feed rate increasing, wall-nonuniformity increases firstly, and then decreases. Furthermore, the wall-nonuniformity reaches a minimum value when the roller feed rate is 0.6mm/r. The wall-nonuniformity increases firstly, and then decreases with the increase of roller fillets radius, but the trend becomes weaker.