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Re: A Few Tips on Warpage...
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Mel in SW Iowa
I do occasional small fabrication production runs on a 4' piece of 18" I beam with an 1 1/2" web that just fits most of the pieces I weld up on it. I clean off the web, jig and clamp the pieces about every 5-6 inches, tack all 4 corners inside and out, butt weld 1/2" x 2" pieces with an 1/8" air gap with 1/8" 6010 rod, needle scale each weld, grind each weld flat, unclamp, flip, reclamp, weld and needle scale each joint on the backside, grind flat and unclamp an almost perfect piece that is usually flat within 1/16" over a 20" finished piece. I give the 1 1/2" welding table that the 18" I beam gives me, with heavy clamping, credit for absorbing heat so well that I usually have very little warp to correct.
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