The Seamless Rolled Ring Forging Process
Producing a ring “perform” by the open die forging process:
1) Upset process: Starting stock, cut to size by weight, first rounded, then upset to achieve structural integrity and directional grain flow.
2) Punching process: Work piece is punched, then pierced to achieve starting “donut” shape needed for ring rolling process.
3) Perform process: Completed preform ready for placement on ring mill for rolling.
4)Ring rolling process: Ring rolling process begins with the idler roller applying pressure to the preform against the drive roll.Ring diameters are increased as the continuous pressure reduces the wall thickness. The axial rolls control the height of the ring as it is being rolled. The process continues until the desired size is achieved.