The factors should be considered in laser cutting machine use

Factors should be considered in laser cutting machine used in the modern society, the popularity of laser and the use of more and more common, it also brought earth-shaking changes to modern life. And the quality evaluation of the laser cutting, yet it is not a unified standard in the world. So far our country has no standards on the quality of laser cutting, give priority to with the EU with the ISO9000 series quality assurance method, and standard sample for laser cutting standard are studied, such as its content includes: cutting quality hierarchy, set the sample, and sample processing and the standard of the sample, the optical system, price model and the beam features, etc. A lot of people in the purchasing or second-hand laser cutting machine, laser cutting machine do not know how to determine quality of laser cutting machine processing. Especially used laser cutting machine suitors in choosing a laser equipment, tend to be blind, sometimes ignore more important quality standards. For laser cutting processing, evaluate its processing quality mainly includes the following principles: 1, cutting smooth, no stripes, not brittle fracture; Metal laser cutting machine high speed cutting plate, the molten metal will not appear in the laser beam at the bottom of the vertical incision, may in the laser beam after partial. As a result, the curved lines formed in the cutting edge, texture closely to follow a moving laser beam, in order to fix this problem, at the end of cutting processing to reduce the feed rate, can greatly eliminate grain line. 2, narrow kerf width, this is mainly related to the laser beam spot diameter size; Metal laser cutting machine cut width generally does not affect the cutting quality, only the outline of special precision is formed within the parts, the cutting width is important, because the cutting width determines the contour of the small Canon, when the sheet thickness increases, the cutting width also will increase. So want to ensure that the same precision, no matter how hard it is incision width, artifacts in processing areas of the laser cutting machine should be constant. 3, the perpendicularity of the kerf width is good, small heat affected zone. Usually, metal laser cutting machine mainly concentrated in the 5 mm below the material on the processing of the cross section vertical degree may not be as the main evaluation factors, but for high-power laser cutting, when processing the thickness of the material for more than 10 mm, the cutting edge of vertical degree is very important. Away from the focus, the laser beam divergence, according to the location of the focus, cutting towards wider at the top or bottom. Cutting edge what percentage deviation from vertical line mm, margin is vertical, the higher the cutting quality. 4, there is no material combustion, melting layer to form, no big slag; CNC laser cutting machine of the metal is hanged slag mainly embodied in the sedimentary and burr, reduction of material deposition for laser cutting before start piercing in workpiece surface with a layer of special liquid oil. Gasification and all kinds of materials in the wind except incision without customers, but the upward or downward discharge will be formed in the surface deposition. And the formation of burr when determining the quality of laser cutting is a very important factor, because of the burr removal need extra workload, so the burr can serious and how much is the intuitive judgment of the quality of the cutting. 5, rough surface plating of incision, the size of the surface roughness is the key to measure laser cutting surface quality. Actually for metal laser cutting machine, cutting section lines and roughness of a direct link directly, often cross section lines of poor cutting performance will directly cause the roughness is higher, and considering the two kinds of different effects on the formation of different, generally we analyze metal CNC laser cutting machine processing quality, still is to separate for analysis. Laser cutting section will form the vertical grain, grain depth determines the cutting surface roughness, the lighter the grain, the cutting section is more smooth. Roughness is not only affect the appearance of the edge, but also affect the friction characteristics, in most cases, the need to reduce the roughness as far as possible, so the more shallow, grain, the higher the cutting quality. 6 heat affected metal laser cutting machine, cutting materials as hot cutting processing equipment, in use process is bound to thermal effects on the metal material, its embodied mainly includes three aspects: 1. Heat affected area; 2. Sag and corrosion; 3. Material deformation of heat affected area refers to the laser cutting, along the area around the incision is heated. At the same time, the structure change of the metal. For example, some metal hardening will happen. Heat affected area refers to the depth of the internal structure change in the region; The sag and corrosion is to have an adverse effect on the surface of the cutting edge, affect the appearance. They appear in general should avoid cutting error; If after cutting makes sharp heating parts, it will be out of shape. This is especially important in the fine processing, because the outline and the connection piece is usually only a few millimeters wide ten points. Control of laser power and the use of short laser pulse can reduce parts heat, avoid deformation. In addition to the above principles, the process of melting layer's status, and eventually forming, directly affects the processing quality evaluation index.