Forging process principle of ring rolling machine

The ring rolling machine is a specialized equipment used to produce ring forgings. Its core process is to roll the metal billet into a ring-shaped part of the required size through plastic deformation. The following are its working principles and key features:

1. Basic working principle

The ring rolling process is based on the theory of metal plastic deformation, and achieves the expansion of the ring blank and the reduction of the wall thickness through the coordinated action of the driving roller and the driven roller. The specific process includes:

Blank heating: The ring-shaped blank (such as a hollow ring) is heated above the recrystallization temperature to soften it for plastic deformation.

Rolling process: The billet is placed between the driving roller and the driven roller. The driving roller rotates to drive the billet to rotate, and at the same time, radial pressure is applied through the hydraulic system to reduce the wall thickness and expand the diameter of the billet.

Guidance and Control: The guide roller ensures the stable rotation of the billet, while the control roller triggers the return action when the predetermined size is reached, ending the rolling process.

2. Process characteristics

High material utilization rate: Compared with traditional casting, the ring rolling process can reduce material waste, and the internal structure of the workpiece is dense, with higher strength.

Multi-roller coordination: The equipment is usually equipped with active rollers, driven rollers, guide rollers, and control rollers, which achieve complex deformation through independent motion.

Dynamic deformation control: It is necessary to precisely control the rolling ratio and the amount of reduction per revolution to ensure stable biting of the billet and dimensional accuracy