As we’ve discussed before, welding can be expensive. Several of the cost drivers for welding can be reduced or eliminated by specifying spot welding when applicable. Today’s topic is spot welding, and how the use of spot welding in place of conventional welding can save money and improve quality.
Heat distortion, follow up finishing requirements, and the need for fixtures and tooling can be better controlled if the part design can support spot welding in place of welding.
What is Spot Welding?
Spot welding is process of passing electrical current through two pieces of metal that are sandwiched between electrodes. The current passing through the metal causes the metal to melt at that precise spot, creating a weld joint – hence the name “spot weld.”
Spot welding focuses the weld process to a very small area, which limits the heat distortion introduced into the part. This also reduces the finishing requirements after welding.
Benefits of Spot Welding
Because spot welding requires two parallel surfaces to press between the electrodes, the parallel surfaces are an ideal location for incorporating self-locating features that eliminate the need for fixtures or tools.
Spot welding cannot replace welding. But, when applicable, it is a viable substitute for welding. This can improve quality and reduce costs.