Our
deep-drawn and ironed shells are cold-formed in a single press cycle that
imparts unique characteristics to the finished product. In this process, flat
circular steel blanks are loaded into a hydraulic press. A cylindrical draw
punch contacts the blank and pushes it through an intake ring (or cupping die).
As the blank is pushed through this ring, it is formed into a thick-walled
cylindrical cup. The punch continues its motion in the same direction, pushing
the cup through a series of progressively smaller diameter ironing dies. As the
cup passes through these dies, the outside diameter is reduced, resulting in the
thinning or "ironing" of the sidewall of the cup transforming the cup
into a much longer cylindrical shell. The shell is stripped off the punch on the
return stroke of the press. The shell can be loaded into a second toolset and on
the return stroke of the two-ended press, the ironing process can be repeated
resulting in an even longer, thinner-walled shell.
Features
Material – Shell - AISI C1008 Mild steel: C
– 0.10; Mn – 0.50; P – 0.02; S – 0.012 (% maximums)
Typical Sidewall Properties:
Tensile strength – 90,000 P.S.I.
Yield Strength – 80,000 P.S.I.
Burst occurs in sidewall – ductile failure mode
with no fragmentation
* Custom sizes available where quantities warrant the investment
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deep-drawn and ironed 
