Deformation on Welded Wtructures

Here's one of many:

Welding distortion and warpage | Welding TIG | MIG Welding | ARC

This should explain why things warp. There are some guys here who know lots about welding and metals and will have better suggestions, I'm sure.

I'm not going to ask how you got this job.

Dear lynlinch, Your answer gives you the right to ask. If that means "how you can supervise this kind of work without knowing all ends about it", the answer is rather simple:

I am quite capable to do it. No offence taken.

This procedure it has been refined through many small (and internally documented) changes in numerous erections of similar characteristics, for many years.

But, to the supervisors, only arrives a final welding procedure.

Although knowing the reason behind the steps, and being capable of detect and correct "night shift" deviations, I think there is always room for improvement, and read what is written about it will be a good step.

Why I look for simple or basic information? Because this one contains usually more graphic material.

I am sure that, if I do not restrict my question in that "simpler" way, I would have got some excellent answers referring to mathematical modeling or finite element analysis literature that is, really, out of my range, and I hate waste mine and/or others time.

The link you sent me, it is a very nice and clear approach to what I am looking for.

Many thanks for it and your time.

Best regards,

Abel

OK.

I've asked a welding engineer to come over and advise you.

Good luck.

The weld pool is molten. Right when it solidifies it is at a much higher temperature than material only a short distance away to which it is ridgidly attached. The weldment undergoes a much greater temperature change as it cools and therefore experiences significant contraction compared to the surrounding.

Unequal changes in the size of rigidly attached material can result in tremendous stresses and deformation.

This is a gross over simplification, but if the path of the weld is line, material perpendicular to that line will be pulled towards that line.

Two liter coke bottles or large sports drink bottles or other containers made of pex make great visual models exhibiting similar effects to an exaggerated degree when subjected to a hot air gun on a path representing a weld.

Bbb. . . . . . . . . Flee to me remote elf