Roundness from Welding
Roundness from Welding
(OP)
I have a Clevis with bore size Ø.763"-.765" and 1.882" long. A shaft of Ø.750 will be welded @ half of the length and the weld need to resist 24000 LB min. pull load.
The issue is this, after welding the clevis bore need to be Ø.760"-Ø.762.
Due to heavy GTAW, the main bore deform and I am not able to maintain the .002" tolerance window, and the part does not shrink uniformly. Any sugestion how to improve the process? Is .002" acheivable with the the current process?
Thanks alot.
The issue is this, after welding the clevis bore need to be Ø.760"-Ø.762.
Due to heavy GTAW, the main bore deform and I am not able to maintain the .002" tolerance window, and the part does not shrink uniformly. Any sugestion how to improve the process? Is .002" acheivable with the the current process?
Thanks alot.





RE: Roundness from Welding
You might be able to predict the distortion after a little history, but every welder and different runs of material will make it almost impossible to stay within .002" and keep it round.
RE: Roundness from Welding
RE: Roundness from Welding
or
2 - weld > rough machine in several small steps > finish machine
If I already had a batch of parts made I'd get some snug fitting hardened pins (maybe a few of each 0.7595/0.7605/0.7615) and put them thru the bores before welding. After welding, I'd play a torch on the yokes to get them up to nearly a dull red to stress relieve them and allow them to conform to the pin. Depending what the the other finish bore requirements are you might be able to plate the yoke ears and then align hone them. Chevy and Ford reclaimed a million press fit connecting rod small ends that way.