Welding is being heavily targeted for automation, apart from pressure vessels etc, most welding can be automated now a days , very soon ( months? ) every welding can be automated.
It'll be a while until a robot disassembles a trailer enough to remove the bent axle, cleans off all the paint and rust, bends the trailer back into shape where needed, cuts a custom support to makeup for some lost strength, welds it in, primers it, paints it, and assembles the trailer.
Same for construction too.