Pitting when resistance welding aluminum
Pitting when resistance welding aluminum
(OP)
We have a application where we are resistance projection welding aluminum. We are having problems at the ground electrode with pitting. Our electrodes are RWMA class #3 copper. Is there a different material that is better suited for this type of welding? What other issues may be causing this?





RE: Pitting when resistance welding aluminum
http://www.welding-advisers.com/
RE: Pitting when resistance welding aluminum
Plus, we aren't having any problems with the weld. The problem is in the ground electrode. Aluminum is transferring to the ground electrode after only a dozen or so cycles. These deposits are then causing damage to the surface.
RE: Pitting when resistance welding aluminum
..."Aluminum and aluminum alloys are very difficult to projection weld. The aluminum oxide is so tenacious that solid projection welding, in particular, is nearly impossible. In addition, it is very difficult to localize heat, because aluminum alloys soften at such low temperatures."
For resistance welding of aluminum the recommended material is RWMA Group A class 1 material. Effective electrode cooling is always needed.
http://www.welding-advisers.com/
RE: Pitting when resistance welding aluminum
RE: Pitting when resistance welding aluminum