warped table frame

[andyman]

finished my welding table this weekend but i got a little carried away with welding the short pieces of tube that connect the middle tube. i beveled the edges where the welds would be flat and one pass didn't fill the bevel in so i decided to fill it up. well as you can see i warped my frame and need some help figuring out how to fix it.

*i welded all around the tube except for the top just a note.

i had the suggestion from a guy at work to heat the welds up then hammer away at it i did that a little bit today but seemed i wasn't getting too far.

my first thought was to cut the welds off on the side of the tubing and then hopefully i'd be able to hammer it in place from there.

i'm up for any kind of advice

Andy