Calculate weld shrinkage?
Calculate weld shrinkage?
(OP)
Does anyone here calculate weld shrinkage?
Yes I know there are a bazillion factors. =)
There was good info here but no numbers:
http://www.eng-tips.com/viewthread.cfm?qid=142412
My specific problem:
I Have a base plate and a 1.5" thick, 18" tall vertical plate welded to it, with a bevel weld. I'm pretty sure the top will bow toward the weld somewhere between 1/8" and 1/2". I want to jig it correctly so that after the weld, the tip it is vertical +/- 1/16".
Thanks!!
Yes I know there are a bazillion factors. =)
There was good info here but no numbers:
http://www.eng-tips.com/viewthread.cfm?qid=142412
My specific problem:
I Have a base plate and a 1.5" thick, 18" tall vertical plate welded to it, with a bevel weld. I'm pretty sure the top will bow toward the weld somewhere between 1/8" and 1/2". I want to jig it correctly so that after the weld, the tip it is vertical +/- 1/16".
Thanks!!





RE: Calculate weld shrinkage?
Do you have access to both sides of the weld? If so, use a double bevel and weld from both sides.
RE: Calculate weld shrinkage?
RE: Calculate weld shrinkage?
RE: Calculate weld shrinkage?
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You mention using a jig which is OK but strange things happen on cooling. There is good point made here about using a jig and leaving the weldment attached and stress relieving the piece as one.
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RE: Calculate weld shrinkage?
Have a look at this book reference it gives the formula:-
http
desertfox
RE: Calculate weld shrinkage?
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: Calculate weld shrinkage?
NR Mandel 21.1 worked well! I decided to adjust it for steel (different CTE), and figured a 0.32" deflection.
We jigged it to compensate; after welding the plate was right on. Thanks all for help!
And yes I am aware that the alignment of the planets was probably involved. =)