Probe into the advantage principle and cutting way of laser cutting machine

Advantages and principles: 

Laser cutting machine is mainly used in the thin plate cutting, for the sheet metal cutting is also a very important part. Generally speaking, laser cutting machine is mainly metal cutting and non-metal cutting. Many cutting methods are difficult to achieve the target mainly because in the speed and quality slightly inferior, but the laser cutting machine precisely in this area has a great advantage, laser cutting machine after the high precision of no longer do follow-up processing, greatly saving time.

The principle of laser cutting machine is to generate a laser beam through a laser, through a series of mirror transmission, and then focus to the surface of the workpiece by focusing mirror, at the intersection of local high temperature, causes the work piece by the heating pad instantaneous melt or the vaporization forms the cutting seam. At the same time in the process of cutting a second auxiliary gas will cut seam at the slag blowing, and finally achieve the goal of cutting. The application of laser cutting mainly to thin plate, cutting a wide range of materials, mainly divided into metal cutting and non-metal cutting. Because the laser has the characteristics of high direction, high brightness and high intensity, the laser cutting speed is fast, the processing precision is high, the cutting seam is very narrow, generally need not follow-up processing.

To sum up, the laser cutting machine in cutting materials, a wider range of higher cutting accuracy. It's cheaper to use. 

Method of cutting:

Laser vaporization cutting 

 uses high energy and high density laser beam to heat the workpiece, make the temperature rise, and vaporize the material into steam in a short time, when the steam is ejected, a cut is made in the material, and the cutting effect is achieved. But materials tend to vaporize very hot, so they should be heated using a high-power laser beam. Laser vaporization of the materials used in general have very thin metal materials and non-metallic materials. 

Laser melt cutting 

laser melt cutting, of course, will be the material heated to a certain temperature to melt, and then through the coaxial nozzle with the beam of non-oxidizing gas, the use of gas pressure to discharge liquid metal, the formation of incision. Laser melting cutting energy required only vaporization cutting 1/10, do not need to make metal completely vaporization. Generally suitable for laser melting and cutting of materials such as stainless steel, titanium, aluminum and its alloys, are not easy to oxidation of materials or active metals.

Laser oxygen cutting  

laser oxygen cutting uses laser as preheating source, and uses active gas such as oxygen as auxiliary gas for cutting. After the gas is ejected, the gas reacts with the metal to produce oxidation heat. At the same time, the molten oxide and the molten material are blown out of the reaction zone to form a cut in the metal. Generally suitable for laser oxygen cutting of carbon steel, titanium steel and heat treatment steel and other easily oxidized metal materials.

Laser scribing and controlled fracture 

This kind of laser cutting utilizes the high energy density laser beam to scan on the material surface, is the material outside is heated sends out a small slot, then applies certain pressure, so the laser will cut along this slot. The material commonly used in this cutting is a brittle material.