top of page
Q02jx6hm.png
SF_T_Logo.png
rolled_ring_head.jpg

Seamless Rolled Ring Forging Process

pattern (1).jpg

Forging Efficient Seamless Rolled Rings

The production of seamless forged rings is often performed by a process called ring rolling on rolling mills. These mills vary in size to produce forged rings with outside diameters of just a few inches to over 300 inches and in weights from a single pound up to over 300,000 pounds.

Plaid Angle Red.png

What is Rolled Ring Forging?

The ring rolling process starts with a circular preform of metal that has been previously upset and pierced (using the open die forging process) to form a hollow “doughnut.” This doughnut is heated above the recrystallization temperature and placed over the idler or mandrel roll. This idler roll then moves under pressure toward a drive roll that continuously rotates to reduce the wall thickness, thereby increasing the diameters (I.D. and O.D.) of the resulting ring.

Seamless rolled rings can be produced in configurations ranging from flat, washer-like parts to tall, cylindrical shapes, with heights ranging from less than an inch to more than 9 feet. Wall thickness to height ratios of rings typically range from 1:16 up to 16:1, although greater proportions can be achieved with special processing. The simplest and most commonly used shape is a rectangular cross-section ring, but shaped tooling can be used to produce seamless rolled rings in complex, custom shapes with contours on the inside and/or outside diameters.

Producing a ring "preform" by the open die forging process:

  • 5_2_2_1-seemless-ring-forging.png

    Starting stock cut to size by weight is first rounded, then upset to achieve structural integrity and directional grain flow.

  • 5_2_2_2-seemless-ring-forging.png

    Workpiece is punched, then pierced to achieve starting “doughnut” shape needed for ring rolling process.

  • 5_2_2_3-seemless-ring-forging.png

    Completed preform is ready for placement on ring mill for rolling.

Rolled ring forging process:

  • 5_2_2_1-rolled-ring-forging.png

    Ring rolling process begins with the idler roll applying pressure to the preform against the drive roll.

  • 5_2_2_2-rolled-ring-forging.png

    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.

  • 5_2_2_2-rolled-ring-forging.png

    The process continues until the desired size is achieved.

Plaid Angle Red.png

Scot Forge Difference

At Scot Forge, we know the importance of getting your parts on-time, as expected. However, for customers new to procuring forgings, ordering a forging that will meet all specifications for end-use applications may be a challenge, which is why finding a trusted supplier and partner is essential. Our employee-owners are here to ensure your project stays on track with our forgings by offering:

We offer many size forgings in both standard and unique geometries to meet your needs.

Pro Tip - Did you know near-net shapes can save you time and money? Oftentimes, a customer calls to order a disc, which they will later machine down to a more shaped part. By working with our technically trained sales team, you can get your finished product shape as close as possible to optimize your production process. 

contact_1.webp
imgres (3).webp

We can help you today!

NOTE: Please do not upload sensitive documents. For a secure file transfer please call 800-435-6621.

bottom of page