1. spot welding - Noun
2. spot welding - Verb
creating an overlapping joint by welding at small points
Source: WordNetspot-welding
Like spot welding, seam welding relies on two electrodes to apply pressure and current to join metal sheets. Source: Internet
In robot welding, mechanized devices both hold the material and perform the weld Lincoln Electric, p. 4.5-1 and at first, spot welding was its most common application, but robotic arc welding increases in popularity as technology advances. Source: Internet