Yep sorry, it’s TIG. You basically just take one of your tungsten electrodes and make it look like it shows up in the package when you get it. You want a factory 90° edge instead of the usual pointed edge that you would prepare before welding. Recessed just means that you keep the end of the tungsten up inside the cup just a hair. Normally you’d never be able to weld anything that way, but with this you’re basically just trying to make a broad arc jump off the end of the tungsten electrode and create a “spot” essentially. You hold the end of the cup 100% flush to the top layer.
It’s kinda odd, usually you’re doing everything you possibly can to get a fine point and focused arc to jump off the electrode and give you a tight puddle to create your weld. With this you want a dull/broad arc to slowly melt the top layer into the back layer. If you can get it sorted out correctly, it gives you a very nice fake spot weld that looks very similar to a factory resistance spot weld.
The factory welds used clamped together force to pass electricity through and fuse the layers together in the process. With TIG you’re purposely jumping an arc off an electrode to the work piece to create a heated molten puddle where you can join metals, so this is kind of a work-around to get that factory look.
|