Scot
Forge produces hollow tube-like forgings in diameters up
to 70" with a 2" minimum wall thickness and up
to 360" long or 80,000 pounds, in ferrous and non-ferrous
materials.
Forging a hollow begins by making an upset
preform, then punching a hole through the center. The workpiece
is then drawn out over a mandrel to the specified length
and O.D./I.D. configuration.
Hollows
can be produced not only in a straight cylindrical shape,
but also with unlimited variations of O.D.s and I.D.s, including
tapers. Because the inside diameter is forged into the part
rather than bored from a solid bar, Scot Forge eliminates
extra time, cost, and material waste.
Scot Forge has also saved production
time and increased part strength for customers by producing
many hollow parts, such as flanged hollows, as a single
component rather than several components welded together.
Hollow
Process Highlights
1.
2.
3.
Piercing
the workpiece to complete the "preform" stage
The
hot ring preform has been placed on a mandrel in preparation
for forging under the press
The
forging is drawn down and elongates over mandrel
4.
5.
Planishing
smoothes the outside surface
The
finished hollow is stamped with the heat number
Hollows
Scot
Forge produces hollow tube-like forgings in diameters up
to 70" with a 2" minimum wall thickness and up
to 360" long or 80,000 pounds, in ferrous and non-ferrous
materials.
Hollows
can be produced not only in a straight cylindrical shape,
but also with unlimited variations of O.D.s and I.D.s, including
tapers. Because the inside diameter is forged into the part
rather than bored from a solid bar, Scot Forge eliminates
extra time, cost, and material waste. 
