Ok, so the metal isnt hateful, its just malicious.
Heres the setup -
Ive been practicing with bits of my Z that I cut out (its sad I've cut so much out its provided a steady stream of practice media..) trying to mate them to little bits of 18 guage sheet. Soon, at the end of this month most likely, I'll be fabbing and welding in my subframes and rebuilding my floor. I've decided to use 18g for the pans (any advice on that would be appreciated as well.. too thick? not thick enough?). I'm having serious trouble mating the 18g to the Z's stock metal.
The Z metal is very thin, but more so than just thin (ive welded thin metal like that before..) its.. I dunno.. Cheap? I'm having trouble getting my arc started at all. As soon as I hit the trigger (im starting the arc on the new 18g) and drag it over to the seam it pops through the cheap metal in about half a second. I'm not even able to form a puddle.. Just *poof* burn through.
I'm starting to get seriously worried that I cant do this with my welder. I have a Lincoln 100amp mig dealie running Flux Core. I know Flux is supposed to be a little hotter than gas and less than optimal for thin sheet metals. In my situation (going with a gas welder or upgrading my welder to gas are not an option.) what would you all do?
I have the welder set to the lowest settings I can. Wirespeed is 1, tapped voltage is "a", lol.
I expect welding large peices will be a little bit easier as the heat will disperse better, but I'm trying to arm myself with as much knowledge on this as I can. When I get my steel I will of course practice more on large peices.. BUt I'm curious what the experts think.
Below is a pic if what I have planned. A quick, crappy mock-up in Photoshop. The red bars show how I will be building the subframe connectors. They actually extend a ways under the car of course, but I just wanted to show the section dealing with the pans so you all can see how they will be divided. The vertical bar is of course the subframe. The horizontal bar is a stiffening component that doubles as a mount for seat brackets I'll be fabbing up. Its slightly out of its actual place in the pic. Now, the bars will actually extend above the floor some. About an inch will the below and an inch above. It'll make a little mound thing in my carpet, but this allows it to butt up against the hatch rise as well as the rear subframe for added stability. This also effectively sections the pans into 4 sections. Which for me, I see as a plus. If I screw up I only ruin a small peice of steel instead of a massive peice the size of the entire pan area.
Given the fact that the pans will have to support weight, I'm thinking that making about a hundred million tack welds wouldnt be an option?
Anyway, any adivce, comments or info on the method I should use and/or the design would be appreciated.
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