1, melt cutting. In laser melting cutting, the workpiece is partially melted by means of air flow the molten material ejected. Because the transfer material occurs only in its liquid situation, so the process is known as laser melting cutting. Laser beam cutting coupled with high purity inert gas to promote the melted material leaving the kerf, and the gas itself is not involved in cutting. Laser cutting can be compared melting and vaporization higher cutting speeds. The energy required for the gasification is usually higher than the energy required to melt the material. In cutting laser melting, a laser beam is absorbed only partially. The maximum cutting speed increased as the laser power increased, and increases with increasing melting temperature of the material and the sheet thickness decreases almost inversely proportional. In the laser power in certain circumstances, limit factor is the cutting pressure and material joints of thermal conductivity. Laser cutting for melting iron and titanium materials can be cut without oxidation. But less than the melting gasifier to produce a laser power density, the steel is between 104W / cm2 ~ 105 W / cm2. 2, vaporization. In the laser vaporization process, the surface temperature was raised to the boiling temperature of the speed is so fast enough to avoid melting caused by heat conduction, so part of the material is vaporized into steam disappears, as a part of the material was discharged from the secondary gas is cut bottom seam stream blown away. It requires very high laser power in this case. In order to prevent material vapor condensing to slotted wall thickness of the material must not significantly exceed the diameter of the laser beam. The process therefore only suitable for use in the molten material must be avoided to exclude situations. The process is actually only a small iron-based alloys for use in the field. This process can not be used, such as wood and some ceramic, etc., who do not have a molten state and therefore is unlikely to make material vapor recondensation of material. In addition, these materials are usually cut thicker to achieve. Laser vaporization, the optimal beam focusing and beam quality depends on the material thickness. Laser power and heat of vaporization of the best focus position only certain impact. Under certain circumstances plate thickness, the maximum cutting speed is inversely proportional to the gasification temperature of the material. Required laser power density greater than 108W / cm2, and depending on the material, cutting depth and the beam focus position. Under certain circumstances plate thickness, assuming sufficient laser power, cutting speed is limited by the maximum speed of the gas jet. 3, the control fault cutting. For brittle materials easy to heat damage, carried out by a laser beam heating speed, controlled cutting, called control fault cutting. The main contents of this cutting process: laser beam heating small areas of brittle materials, causing a large thermal gradient in the region and severe mechanical deformation, resulting in material cracks. Just keep a balanced heating gradient, the laser beam can be guided cracks in any desired direction. 4, oxidation melting cutting (laser flame cutting). Cutting generally used inert gas melting, if replaced by oxygen or other reactive gas, the material is ignited by irradiation of the laser beam, and the other heat generating violent chemical reaction with oxygen, the material is further heated, called oxidation melting cutting . Because of this effect, for the structural steel of the same thickness, can be obtained using the method of cutting the cutting speed is higher than the melting. On the other hand, the method and the melt may be worse compared to the cutting quality of the cut. In fact, it will generate a wider kerf, obvious roughness, increased heat-affected zone and poorer edge quality. Laser flame cutting in the processing precision and sharp corners are not good model (with burnt corners of danger). You can use the laser pulse mode to limit the influence of the heat of the laser power determines the cutting speed. In the laser power in certain circumstances, limit factor is the oxygen supply and thermal conductivity of the material. QQ: 447380394 Tel: 027-85717787 Tamrac Tamrac laser laser http://www.whhxty.com Alibaba station http://whtyjg.1688.com Jupiter photoelectric http://www.muxing360.com