Help! > Mistakes, muckups, and dangerous behaviour
Can this part be saved? Internal stress
uuu:
I look forward to how this all turns out, as I have some parts to cut out of a 48" long rectangular bar of 303. I know the stuff machines OK, as I've used some of it already, but not long parts yet.
Wilf
Jasonb:
Won't hurt to try and bend it. Mill vice would probably do, just use feeler gauge to pack the "high" point so you can bend it beyond straight as there will be some spring back.
It's times like this when Hot Rolled mild steel has it's advantages over shiny stainless and why stainless is not usually used for much on a steam engine except piston and valve rods.
Chris. I imaging it was cut from wider bar held on edge in the vice. The profile cut and then a slitting saw used to cut it from the stock that is still in the vice. so basically the top edge of the piece has expanded once cut from the stock and caused the bend. In other words the cut is unbalanced vertically not horizontally
matthew-s:
Yes. It’s generally as Jasonb drew it. It so happens that Kim approached this part differently than Kozo suggests, so my link to his post only really shows what the finished part is like.
I’m going to try the “vise as a press” method. Can’t make it worse! I shall report back here with the results.
Charles Lamont:
Not having any kind of press in the shop, I find light jobs can be accomplished with a fair amount of control using the pillar drill. The spindle bearings are good for a fair amount of force, and after all, another name for it is drill press. Things sit on the table while adjustments are made, rather than falling out of the bench vice.
Kim:
I'd go with the bending route. You don't really need too much movement there to get it back where you want it.
Sorry you're having to deal with this :(
I would think annealing stainless would work similar to other steel, though I don't know as I haven't really done it before. I have successfully work hardened stainless though! :ROFL:
Good luck! Make sure and let us know how it comes out!
Kim
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