Large thickness plasma cutting machining techniques

Plasma cutting machine is a gas mixture by high-frequency arc, so that some of the gas, "decomposition" or ionized, becoming the basic atomic particles, resulting in a "plasma." When the arc jump to the workpiece, the high pressure gas from the plasma torch burner blown outlet speed of 800 ~ 1 000 m / s (approximately Mach 3). High temperature plasma arc column, up to 10 000 ℃ ~ 30 000 ℃, far more than the melting point of all metallic or non-metallic materials, so that the rapid melting of the workpiece to be cut, molten metal ejected from the high-pressure air to blow away . Therefore, the use of smoke and slag equipment. Plasma cutting with different working gas can cut a variety of metal cutting oxygen cutting difficult, especially for non-ferrous metals (stainless steel, aluminum, copper, titanium, nickel) cut better; its main advantage is that the thickness of the metal material is not cut when plasma cutting speed, especially when ordinary carbon steel sheet cutting, oxygen cutting speeds of up to 5 to 6 times, cutting surface smooth, heat deformation small, almost no heat affected zone. Plasma cutting to the present, may be working gas (working gas is a plasma arc conductive medium, but also bring hot body, but also to exclude the incision of the molten metal) cutting characteristics of the plasma arc and the cutting quality and speed have significant impact. Commonly used plasma arc working gas is argon, hydrogen, nitrogen, oxygen, air, water vapor and some of the mixed gas.