After the end of the wedge section, the forming of the workpiece is coming to an end, and the parts are basically formed. The driving spiral bevel gear blank formed by this cross wedge rolling process is shown in the figure:
Figure a shows the shape of the workpiece before cutting after rolling in pairs, and figure B and figure C show the shape of the workpiece after cutting and after removing the material head respectively. It can be seen that the rolled driving spiral bevel gear blank is relatively regular, without major deformation such as bending distortion, and the shaft of spiral bevel gear blank is also relatively straight, indicating that the die wedge design is more reasonable, the rolling process is more stable, and the stress of the rolled piece is more uniform and reasonable.
There is a spiral step at the tail of the rolled piece. This spiral step belongs to the material head and needs to be cut off finally, so it has no impact on the product. However, there is a folded burr on the large end face of the cone head (as shown in Figure b). Under the continuous rolling of the roll, this folded burr will be continuously generated and rolled into the joint between the large end face of the cone head and the shaft, which is very unfavorable to the connection strength of this part.