Due to the particularity of the forming process of rotary forging, it takes a long time to calculate in a numerical simulation process. Under the same process parameters, three kinds of preforms are used respectively. At the end of forming, the filling effect is shown in the figure.
(b)Conical blank of straight bevel gear
(c)Cylindrical blank of spur bevel gear
When the magnification factor is the same, the filling quality of blanks with different shapes in the die cavity is different at the end of forming. The shape of drum blank gear is full, and there is no corner collapse defect at the corner, while the “meat shortage” defect appears in the middle of cylindrical and conical blank tooth shape.