Re: FWIW first welding job, 2 years on

"Richard Smith"  wrote in message news:m1jzc6u3ox.fsf@void.com...
"Jim Wilkins" <muratlanne@gmail.com> writes:

Bending / welding allowances

You are well ahead of me.  i doubt i can help.
Press-brake - they have a press-brake, yes - good.
Not new when bought.  Is small "fabco.".
Seeing if corrections / calibrations needed to go in to the settings, I think.
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Bending allowance can be determined by bending a small test coupon and measuring the resulting lengths. I've seen welders hammer the cooling beads but my night school training didn't cover that aspect, it seemed to be done by experience and judgment instead of pre-planning.
A practical example is welding a repair in a curved fender. A patch dished to copy the existing fender shape will flatten from weld shrinkage. If there's space behind, like on my pickup truck bed, I can restore the curve with a hammer and dolly, but the integral steel inner wheel well on the car blocks access for a dolly so if it had antique value I'd need to preform the patch 'somewhat' deeper to compensate, or build it up with filler.
jsw