Process and apparatus for partially melting objects

摘要

Spot welding or production of holes takes place solely with use of a plasma pulse produced by application of a voltage pulse which exceeds the flash-over voltage of the gap between the electrodes (15', 19'). An Independent claim is given for the apparatus used for implementation of the process. The apparatus includes only a voltage source for producing a voltage pulse necessary for generation of a plasma pulse. The nozzle (16) of the plasma gun (11) is surrounded by a protruding cover ring (96) whose interior forms a preliminary chamber (97).