Spot welding sheet metal deformation help
Spot welding sheet metal deformation help
(OP)
I continue to have issues with spot welding cold rolled sheet metal(16ga up to 22ga) and visible deformation of the area once powder coated.
Does anyone have any tips for reducing the amount of deformation of the sheet metal around this area. Weld tips, voltages, etc?
A secondary sanding operation has been added which helps but not all the time.
Am I expecting too much!
Does anyone have any tips for reducing the amount of deformation of the sheet metal around this area. Weld tips, voltages, etc?
A secondary sanding operation has been added which helps but not all the time.
Am I expecting too much!





RE: Spot welding sheet metal deformation help
You can screw around with electrode shapes and pressure settings, but basically, if the electrode didn't leave a mark of some kind, you probably don't have a weld.
Mike Halloran
Pembroke Pines, FL, USA
RE: Spot welding sheet metal deformation help
Mike is right about the spot weld settings. There is nothing worse than having a welded assembly fall apart in your hands and trying to identify defective parts in wip and inventory.
Matt Evans
Moorestown, NJ
RE: Spot welding sheet metal deformation help
We use your metal gauges a lot and there are a couple things you might try.
Use a large dia swivel on the lower tip with a small tip upstairs. Keep the surface you want to keep mark-free on the bottom and less critical on top.
Really look hard at your setups of time, pressure and voltage. Sparks flying on video of autobody welders may look impressive but in reality there should be no molten metal flying around.
Probably should go without saying but make certain your operators/setup people are actually setting parameters and not just entering their lotto numbers. Too many operators "adjust" parameters without understanding the relationships.
Hope this helps some.
Griffy
RE: Spot welding sheet metal deformation help
Andy