Laser cutting machine processing quality judgment standard analysis

Laser cutting machine system generally consists of laser generator, (external) beam transmission components, table (machine tool), microcomputer numerical control cabinet, cooler and computer (hardware and software) and other components. Cutting accuracy is the first element to judge the quality of CNC laser cutting machine.

 In the process of laser cutting of general materials, due to the high cutting speed, the thermal deformation produced by the parts is very small, and the dimensional accuracy of the cut parts mainly depends on the mechanical accuracy and control accuracy of the laser cutting machine table. In the pulse laser cutting process, the use of high-precision cutting devices and control technology, dimensional accuracy can be to um level.

 So, what are the criteria for judging the quality of laser cutting machine processing? Lixing laser technical personnel to analyze and answer your questions.

Laser cutting machine processing quality criteria analysis.

 Laser cutting quality evaluation, the international community has not yet a unified standard. The main basis for testing the quality of laser cutting is JIS and WES (welding specifications). In the CEN (European standardization bodies) and ISO (International Organization for Standardization) there are standardization issues on laser cutting. EU mainly provided about the ISO9000 series of quality assurance methods, laser cutting standards and standard specimen provisions, etc., the content includes: cutting quality level classification, set the sample and processing sample standards, optical systems, price samples of the machine type and beam characteristics.

 1, the evaluation of the main principles of laser cutting process quality

 Laser cutting machine must cut smooth, no streaks, no brittle fracture; narrow slit width, related to the size of the laser beam spot diameter; good perpendicularity of the slit, small heat-affected zone; no material burning, no molten layer formation, no large slag; kerf surface roughness, the size of the surface roughness is the key to measuring the quality of the laser cutting surface. In addition, the state of the melting layer during processing and the final shape, which directly affects the quality of laser cutting process evaluation.

 2, measuring the quality of laser cutting machine cutting standards

 Measure the quality of laser cutting machine cutting standards: cutting surface roughness Rz, the size of the kerf hanging slag, cutting edge verticality and slope u, cutting edge rounding size r, streak after the amount of drag n, flatness F. The development of laser cutting technology, laser cutting is used in a wider and wider range of fields, and more and more applicable materials. But different materials have different characteristics, so the matters that need attention when using laser cutting are also different.

 3, laser cutting machine cutting quality factors

 Laser cutting machine laser generator of the size of the laser coalescence. After aggregation, if the spot is very small, the cutting accuracy is very high, if the gap after cutting is also very small. It means that the precision of the laser cutting machine is very high, the quality is very high. The precision of the table: If the precision of the table is very high, the accuracy of the cutting is also increased. The laser beam coalesces into a cone; cutting different materials, will also affect the accuracy of the laser cutting machine.

 4, laser cutting surface roughness affecting factors

 The inherent parameters of the cutting system of the laser cutting machine, such as spot pattern, focal length, etc.; adjustable process parameters in the cutting process, such as power level, cutting speed, auxiliary gas type and pressure, etc.; physical parameters of the processed material, such as the absorption rate of the laser, melting point, molten metal oxide viscosity coefficient, metal oxide surface tension, etc.. In addition, the thickness of the processed part also has a great impact on the laser cutting surface quality. Relatively speaking, the smaller the thickness of the metal workpiece, the higher the roughness grade of the cut surface.