This cutting process is the main content

Cutting surface roughness is the most important measure of the quality of laser cutting of a parameter.
Described as follows: the material surface in the laser beam irradiation was quickly heated to ignition temperature, followed by intense with oxygen combustion, emit heat. Role in this heat, the material formed within the holes filled with steam, while the holes around the walls surrounded by molten metal. Burning mass transfer of oxygen into the slag and metal control the burning rate, and oxygen diffusion through the slag to reach the speed of the ignition front also has a great influence the combustion rate. The higher the oxygen flow rate, combustion chemistry and the faster removal of slag. Of course, the oxygen flow rate is not as high as possible, because the flow rate too fast will lead to the exit slit of metal oxide reaction products that rapid cooling, which is the cutting quality is unfavorable. Clearly, the oxidation process of cutting the existence of two melting heat, and oxygen that laser irradiation can produce a chemical reaction with the metal heat. It is estimated that cutting steel, the oxidation reaction to the release of heat required to account for cutting about 60% of all energy.  cell phone jammer will be more convenient for the user to locate the target more accurately ad flexibly.
Obviously, compared with inert gas, the use of oxygen as an aid to get a higher gas cutting speeds. Has two sources of heat in the oxidation of molten cutting process, if the oxygen burning faster than the laser beam speed, kerf width and rough look. If the speed of the laser beam moves faster than the combustion of oxygen, the resulting narrow kerf and smooth. For easy heat damage to the brittle material, heated by the laser beam for high-speed, controlled cut-off, called the control fracture cutting. This cutting process is the main content: the laser beam to heat a small area of brittle materials, causing a large thermal gradient in the region and severe mechanical deformation, leading to the formation of cracks in materials. As long as a balanced heat gradient, the laser beam can be guided cracks produced in any desired direction. It should be noted that this control is not suitable for cutting acute fracture and cutting edge kerf angle. Closed form is not easy to cut big success. Control fracture cutting speed, does not require high power, otherwise it will cause surface melting, destruction kerf edge. The main control parameter is the laser power and spot size. This kind of cell phone jammer is very electricity-saving.The maintenance of cell phone jammer has the relatively low requirement