frame building

all i have to say is get a frame table and clamp it all down

So none of you have ever unbolted something from a fixture and had it move on you?

t

im building a frame table and im going to line it up and tack weld it to the frame table so it wont move any and just only weld so much so it cant twist or pull the frame ill get a pic of it and i got adjustable legs so i can get it level and move it around in my garage or even take it out side and get it level by adjusting the legs

When welding rails I find it best to tack all 4 corners, then weld the inside and outside edges on the narrow width of the rails, then weld the 3" or 4" side. one at a time.

^^^^^ That is pretty much what I do.

Regardless of what anyone says yes it will move somewhat clamp it down and pretty much do what seth said only thing i will add is to let it cool to the touch

if you welded it, it moved...thats all there is to it. you argue it, you are wrong. Basically each piece has to be fully constrained and located against a surface that is dimensionally significant. for example, the surface of the table is the reference point for the bottom of the frame. weld some square uprights to the surface that will serve as your "outside of the frame" stops. make sure they are in the right place and perpendicular to the table surface. clamp each section in the down direction, and then clamp it in the out direction holding it against the stops you made. I like to put a few tacks on each piece to tack it to the jig, it helps secure it better and if a tack breaks, you know something moved. never weld 2 pieces together unless they are both clamped against the jig, dont hesitate to clamp any other pieces while your welding. it takes 2 seconds to put a clamp on. The sections of your frame that are higher than the bottom surface, like where the frame goes over the axle, make long uprights and connect them together with a piece of square tubing that holds them parallel and use that piece of square as the higher surface to clamp down on. make sure the square tubing is parallel with the surface of the table.