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Welding On Car Frame. By that standard welding a semi-truck frame is probably a bad idea. Practical MIG welding - Chassis Welding This is an example chassis repair from the Aston Martin V8 restoration.
Welding on the web of the frame is the least risky place to weld but there is ALWAYS a liability issue when You modify a vehicle. Once you have that Frankenstein welded back together then you have to go through industrial machines that will clamp onto the car and have it stretched back out the cost of repair could be well over 10000 at this point. The resistor represents the car body.
Light and medium duty trucks use mild steel frames pickup frames generally have some welded areas as manufactured.
I have assumed the car battery voltage is 12V and the welder voltage is 100V. To avoid damaging the vital components of the car such as the ECU. Best Way To Weld Car Frame. The two most viable options for welding car frames are the TIG and MIG welding processes.