2019-08-20 The cutting edge of metal sheet of the plasma cutting machine cannot be completely vertical. Plasma is a kind of high temperature cutting, which is blown out by compressed air. During the cutting process, the temperature above the cutting nozzle is greater than the temperature below. Generally, ordinary plasma cutting torch has a taper within 15°. The fine plasma cutting torch has a taper within 8°. When plasma cutting is performed on a thicker sheet, the taper of the cut edge is larger than that of a thin sheet.