1. The concept of laser cutting machine and plasma cutting machine

Laser cutting originated in the mid-1960s and is characterized by the use of magnified lasers as “tools” and the use of computer numerical control programs to perform cutting operations. The laser cutting machine focuses the laser light emitted from the laser into a high-power density laser beam through the optical path system. The laser beam irradiates the surface of the workpiece to make the workpiece reach the melting point or boiling point, and the high-pressure gas coaxial with the beam blows away the molten or vaporized metal. As the relative position of the beam and the workpiece moves, the material will eventually form a slit, so as to achieve the purpose of cutting.

Plasma cutting originated in the 1950s and is characterized by the use of plasma torches. The plasma torch generates a plasma heat flow that can melt the hardest materials. The plasma arc cutting machine is a machine that uses plasma cutting technology to process metal materials. Plasma cutting is a processing method that uses the heat of a high-temperature plasma arc to partially or partially melt (and evaporate) the metal at the incision of the workpiece, and uses the momentum of the high-speed plasma to remove the molten metal to form an incision.

2. Advantages of laser cutting machine and plasma cutting machine

Laser cutting is to replace the traditional mechanical knife with an invisible beam. It has the characteristics of high precision, fast cutting, not limited to the cutting pattern, automatic typesetting, saving material, smooth cutting, and low processing cost. It will gradually improve or replace it. Traditional metal cutting process equipment.

The mechanical part of the laser cutter head has no contact with the workpiece, and will not scratch the surface of the workpiece during work; the laser cutting speed is fast, the incision is smooth and flat, and generally does not need subsequent processing; the cutting heat affected zone is small, the plate deformation is small, and the incision has no mechanical stress , No cutting burrs; high processing accuracy, good repeatability, without damaging the surface of the material; CNC programming, can process any plan, can cut a large area of the whole board, without opening a mold, economical and time-saving.Mainly used in sheet metal processing, aviation, aerospace, electronics, electrical appliances, subway accessories, automobiles, food machinery, textile machinery, engineering machinery, precision accessories, ships, metallurgical equipment, elevators, household appliances, craft gifts, tool processing, decoration, Advertising, metal processing, kitchenware processing and other manufacturing and processing industries. Cutting of stainless steel, carbon steel, alloy steel, silicon steel, spring steel, aluminum, aluminum alloy, galvanized sheet, aluminized zinc plate, pickling sheet, copper, titanium and other metal plates and pipes.

Plasma cutting does not use fire or flame, but uses conductive ionized gas, also known as plasma. The plasma can reach a very high temperature. The plasma cutting machine with different working gases can cut all kinds of metals that are difficult to cut with oxygen, especially for non-ferrous metals (aluminum, copper, titanium, nickel). The cutting effect is better; its main advantages When cutting metal with a small thickness, the plasma cutting speed is fast, especially when cutting ordinary carbon steel sheets, the speed can reach 5-6 times that of the oxygen cutting method, the cutting surface is smooth, the thermal deformation is small, and there is almost no heat-affected zone. .

The working gas that the plasma cutting machine can use (the working gas is the conductive medium of the plasma arc, it is also the heat-carrying body, and at the same time the molten metal in the incision must be excluded) has a significant impact on the cutting characteristics of the plasma arc and the cutting quality and speed. . Commonly used plasma arc working gases are argon, hydrogen, nitrogen, oxygen, air, water vapor and some mixed gases. Plasma cutting machines are widely used in various industries such as automobiles, locomotives, pressure vessels, chemical machinery, nuclear industry, general machinery, engineering machinery, and steel structures.