Laser welder

Laser welders do not look or function like welders. They are circular saws. The laser part seems to be correct though.

Fiction

Dreamwave Armada comics

Longarm had freed himself from the rubble in the Decepticon base and used a laser welder to free Sparkplug and Jolt. Because the laser welder wasn't meant for heavy work, Longarm progressed only slowly. Wreckage helped him out with a better laser tool. Armada #7