To answer some of your questions:
Your calculation for the force required to shear the material is more or less correct but in practice you would use two or three times the theoretical 3.3 tons.
Your idea of doing things all in one bang would result in long skinny tooling that would likely fail by buckling sideways.
You probably do not need to worry about annealing because 1018 does not work harden much if at all.
Final comment; cupping .5" diameter 1/8" thick in 1018 may be difficult. Do you plan on making your own tooling?
__________________
An open mind is a virtue...so long as all the common sense has not leaked out. |