Hello to all.
I am looking for some advise, ideas or input.
I have a Minganti vertcal CNC lathe, it is capable of holding 2/10 tolerance.
I am turning heat treated parts that are somewhat distorted.
My problem is when I complete the turn some of the part's are out of round or sometimes it has a taper.
The parts that are more out of round before the turn are more out of round when finished turning.
Any part that is more than .015 out of round seems to be the ones that turn out bad.
Then part program takes the initial rough cut down to .018 over the final dimension. The initial raw part is .030 over sized. The wall thickness (raw) is .250.
My primary concern is how much stock to remove. In other words, if my initial is .030 over and I cut it down to .018 over on the first rough cut, could this possible a problem?
So I guess my question should be how much material can be removed before the metal is stressed?
I am trying to hold a 4/10 tolerance.