Spot/Projection Weld Pitch

[tchak]

Hi,

A bracket is projection welded (R3mm) to a part with a weld pitch of 18mm. I would like to put a 3-sheet 12mm spot weld directly between the two projection welds (slightly offset from the centerline) to bond this assembly to another panel. I realize that due to the small pitch between the spot weld and the projection welds, there will almost definitely be some current diversion. Is there a way to predict the weld strength of the spot weld though? We just need to hold the parts together. It is not a critical weld, but I would like to put a spec on it.

Please see the attached diagrams for details.

Thanks in advance!

 

[desertfox]

Hi tchak

I am not aware of any calculations to verify strengths of a spot welds, I think the way forward is to have the part made up with just the spot weld and test it to failure, in fact test a few and you will have some field data.

desertfox