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.
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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.
At Specialty Ring Products (SRP), we&#;ve seen an increase in the number of customers asking us to manufacture aluminum rolled rings.
Aluminum rings are:
These factors make aluminum rolled rings an ideal choice for the types of high-stress applications often found in the defense and aerospace industry. In fact, forged aluminum&#;s low density relative to steel makes it an ideal candidate for aerospace applications.
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When applications call for a high-strength, circular cross-section component, rolled ring forging has no match.
The process typically begins with an open-due forging to create a doughnut-shaped ring. From there, rollers put pressure on the pre-form until they achieve your desired wall thickness and height. The resulting rings are then machined into their final dimensions for use in bearings, gears and seals.
Due to aluminum&#;s greater malleability compared to steel, aluminum rolled rings must be rolled at a slower rate under consistent pressure. Aluminum needs a lower temperature, which means special furnaces are required during production.
SRP&#;s capabilities with aluminum extend to a variety of alloys including , , , , , , , , , , , , and . We can forge aluminum rolled rings to a maximum diameter of 30 inches and a maximum height of 5 inches.
SRP produces aluminum rings, disks and near net shapes that consistently meet the demanding specifications of its customers.
We are AS Rev D and ISO : certified and maintain the most rigorous quality assurance processes in the industry. Our devotion to the quality of our products has earned us approvals from some of the leading aerospace and defense companies in the world and made us a leader in the forging industry for more than 130 years.
Contact us today to learn more about our aluminum rolled rings and all of our other capabilities.
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