Philadelphia Forgings is a preferred
supplier of seamless rolled rings and other superior forgings. Serving
customers in Pennsylvania, New Jersey, Delaware, and across the
nation, Philadelphia Forgings offers seamless rolled rings with
enhanced densities and aligned grain flow. The weights of these
seamless rolled ring forgings range from a few pounds to thousands
of pounds while sizes range from two inches inside diameter (I.D.)
to twenty feet outside diameter (O.D.).
The Rolled Ring Forging
The process of rolling seamless
rings begins with open die forging
which creates a preform workpiece. Open
die forging processes, rounds, and upsets a piece of stock which
aligns the grain flow of the metal. The workpiece is then punched
in the center to create a hole necessary to place the workpiece
in the ring mill.
The ring mill uses three different
types of rolls: a driver roll, an idler roll, and two axial rolls.
The idler roll rotates and applies pressure to the inside of the
ring while the driver roll applies pressure to the outside of the
ring. The metal begins to flatten and the diameter increases; the
height of the ring, meanwhile, is controlled by the two axial rolls.
The ring rolling process continues until the correct diameter is
Benefits of Seamless Rolled Ring
die forging process removes structural defects as well as porosity
and aligns the grain flow in the preform workpiece. The rolling
process itself creates rings with improved concentricity and smoothness.
Furthermore, ring forgings that have been created in rolling mills
are more cost effective. Companies who order our seamless rolled
rings do not need to burn or machine out the inside diameter as
is the case with plate products. With higher impact and fatigue
resistance as well as a more predictable grain structure, seamless
rolled rings offer the greater strengths and better mechanical properties
that many manufacturers need.
Seamless Rolled Ring
Rolled rings are forged from many
stainless steel, carbon
alloy, brass alloy, titanium
alloy, nickel alloys, copper, and many others. These forgings can meet nearly any strength
requirement, whether for stress, impact, or load. Visit the forged
materials section to see a full listing.