Laser cutting is the laser beam exposure to the surface of the energy to make the workpiece melt and evaporate, in order to achieve the purpose of cutting and carving, with high precision, fast cutting speed, not limited to cutting pattern, automatic typesetting save material, smooth incision, low processing cost characteristics, will gradually improve or replace the traditional cutting process equipment.
Laser cutting machine equipment, as a new tool, is becoming more and more mature and used in various industries, including laser cutting machine, laser engraving machine, laser marking machine and so on. Laser energy in the form of light into a high density beam, beam to the working surface, produce enough heat, make the material melting, combined with the beam coaxial high pressure gas directly remove melting metal, so as to achieve the purpose of cutting, this shows that laser cutting processing with machine machining has essential difference.
It is the use of laser beam from the laser generator, the optical path system, poly into high power density of laser beam irradiation conditions, laser heat absorption by workpiece material, workpiece temperature rises sharply, reached the boiling point, the material began to vaporize and form holes, with high pressure airflow, as the beam and the relative position of the workpiece, finally make the material cut. The process parameters (cutting speed, laser power, gas pressure, etc.) and the motion trajectory of the cut joint are controlled by the numerical control system, and the slag at the cut joint is blown away by the auxiliary gas of a certain pressure.
CNC plasma cutting machine is a new type of thermal cutting equipment, its working principle is to use the heat of high temperature plasma arc to melt the metal at the workpiece incision, and by the high speed of plasma momentum to eliminate the melt metal to form a incision processing method.
With the development of plasma cutting to now, the available working gas has an obvious influence on the cutting characteristics, cutting quality and speed of the plasma arc. Commonly used plasma arc working gases are argon, hydrogen, nitrogen, oxygen, air, water vapor, and some mixed gases. Plasma cutting machine is widely used in automobile, locomotive, pressure vessel, chemical machinery, nuclear industry, general machinery, construction machinery, steel structure and other industries. Laser cutting is the use of high power density laser beam to scan the surface of the material, in a very short time to heat the material to thousands to thousands of degrees Celsius, so that the material melt or gasify, and then use high pressure gas will melt or gasify the material Blow it away from the cut joint to achieve the purpose of cutting the material. Laser cutting, because the traditional mechanical knife is replaced with invisible beam, the mechanical part of the laser head has no contact with the work, will not cause scratches to the working surface in the work; laser cutting speed, smooth and smooth, generally without subsequent processing; cutting thermal influence area small, small plate deformation, narrow cutting joint (0.1mm~0.3mm): incision without mechanical stress, cut burr; high processing accuracy, good repeatability, no damage material surface; numerical control programming, can process any plane plan, can cut the whole plate, without opening the mold, economy and time.