ring rolling machine process

Introduce
The production of seamless forged rings is often performed by a process called ring rolling machine. These machine vary in size to produce forged rings with outside diameters from 45 mm 1500 mm to and in weights from 0.5 kg up to over 400 kgs.

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What is ring rolling machine

The ring rolling process starts with a circular preform of metal that has been previously upset and pierced (using the open die forging machines) to form a hollow “doughnut.” This doughnut is heated above 1000℃ 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.

Ring rolling machine process stage

Full wiew

First is heat the material to above 1000℃ temperature.

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

2. Piercing involves forcing a punch into the hot upset stock causing metal to be displaced radially, as shown by the illustration

3. A subsequent operation, shearing, serves to remove the small punchout

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4. producing a completed hole through the stock, which is now ready for the ring rolling operation itself. At this point the stock is called a preform.

5. The doughnut-shaped preform is slipped over the ID roll shown here from an "above" view.

6. A side view of the ring mill and preform workpiece, which squeezes it against the OD roll which imparts rotary action

7. Resulting in a thinning of the section and correspondence increase in the diameter of the ring. Once off the ring mill, the ring is then ready for secondary operations such as close tolerance sizing, parting, heat treatment and test/inspection.

Full process video

When it comes to supplying your next job, it will take all sorts of parts and components that are made in different ways. One method of producing pieces are through rolled ring forging. There are a lot of benefits to the process that can really make a difference for your next project.

The Process

When it comes to the rolled ring forging process, it can be broken down into six steps. In the first step, the billet is cut to the proper size and is then upset to achieve the right properties. After that, the center is punched to create the ring that is rolled. After the donut is ready for ring rolling, the ring is placed on an idler roll and is manipulated by axial rolls and the drive roll. The ring diameter slowly increases as more pressure is applied and once the desired size is reached, the process is done.

Many Advantages

When it comes to this kind of forging, there are a lot of benefits. Given the forging process, one of the biggest benefits is how strong the final product is. The rings that are produced are stronger than other components and they maintain their strength in high-temperature environments. They are also cost effective compared to other methods of production. There is less machining involved, which cuts down on cost. In addition to how strong and cost-effective it is, you can also use a wide range of materials in production. You can forge allot, stainless steel, carbon, aerospace metals, and more.

Are You in Need of Rolled Ring Forging?

Have you been looking for rolled ring forging for your next project? If so, contact us today. Ferralloy has been providing for a global industrial customer base for going on 40 years.

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