plasma is an ionized gas composed of electrons, positive ions, and neutral atoms. plasma cutting is a processing method that uses the heat of a high-temperature plasma arc to locally melt the metal at the workpiece incision, and uses the momentum of high-speed plasma to discharge the molten metal to form a cutting seam. it is widely used due to its advantages such as fast cutting speed, high cutting accuracy, easy setting of cutting conditions, easy implementation of automation, unmanned operation, and relatively low cost. with the combination of information technology and control technology with plasma cutting, newly developed plasma cutting machines have made significant progress in design theory, design parameters, product quality, and performance in recent years.