Although the plate was fairly flat, this happened when I finished cutting the punch plate out of the center of the sheet.. I think I can straighten it out though. I'm gonna use a bottle jack and chain to apply pressure and then weld on a piece of 1/4" on both sides to hold it in place.. we'll see how that works.
The best way we've found out to correct this when we make long cuts with a track torch is use a rosebud torch to heat the opposite side of the bend a little and let it pull back into a straight peice little by little.
Never heat it enough that it turns cherry red,that makes mild steel a little softer.Just heat it enough that you see the steel turn color just a tad,you don't want to heat the whole thing all way through.
Sometimes we'll use Bridge Clamps and cut them in 1/2 to make a 1/2 clamp out them and weld to a fab table to apply downward pressure as we slowly heat the peice,after it cools a little you can actualy see the clamps loosen up on it as it cools,then continue to heat and apply pressure until its as straight as you want it.
You can also spray water on that side when its hot and actualy watch it pull itself straighter,either a little spray bottle with water or some soakin wet wrags and wipe across it.
Once its close to as straight as you want it,tack it to a straight fab table and apply just a little bit of heat again and let cool to room temp before cutting it loose..it usualy does the trick well and no stress in the steel.
Awesome Build!..i've been "secretly" watchin it come together..lol