Laser Marking Technology in the application of metal marker

Current metal processing almost all use of Nd: YAG laser. However, low-power CO2 laser can also play a variety of metallic materials superscript, including low carbon steel and stainless steel, chrome nickel-iron alloy and titanium. Synrad recently by the successful development of the air-cooled 60 W CO2 laser pulses with fast rise time and high beam quality, which is particularly suited to metal marker. This laser can be Galvanometer-marking the first combination constitutes a pocket-sized packaging system. Compared with YAG system, the system is low-cost and small trajectory characteristics. Faced with many industrial fields in a variety of metal workpieces on the subject demands, such as printing text, graphics, bar codes or other codes, CO2 laser will have tremendous application market. In the metal marker is usually 50 to 200 W using the CO2 laser. A target types of surface melting and non-melting surface of the two. In the non-surface melting, when the material heated by the laser beam focusing, formed by the oxidation of the surface discoloration marks, and in the surface melting, it is necessary to increase the laser energy to make metal surface melting, molten metal to form marked solidification . Marked by the formation of type laser energy input, a gas target species and the protection of the materials used and other factors decision. 60 W CO2 laser used in the printing on 316 stainless steel marker: Surface melting-marking, non-melting-surface markers in metal marker is a high-energy process, the smaller spot size, the shorter the focal length lens, he and the quality of the marking the higher, marking cycle is relatively short. It is the marking to narrow the field size for the price. For steel, the biggest practical spot diameter of 300, the smallest about 100. These spot marking the size of the market size (diameter) and were about 4 in 12 in. 100 spot power density is 300 Qing spot nine times. Obviously, the lens focal length and marking the smallest size of the field can significantly shorten the cycle marking. For a given optical system, the laser output beam quality higher, the focus will be small spot size, which can improve processing efficiency. What should be used and the size of the light spot is the size of the marker itself. For most materials, the minimum character height spot size is about five times that of the 100 Qing spot can produce high of 0.02 in characters. Metal surface finish is the impact of the final results of processing one of the important factors. High surface roughness of the sandblasting metal, its optical reflectivity less than smooth surface, thus marking, the need to import less laser energy. Bare aluminum, brass Chitong and not directly with low-power CO2 laser marking, but after anodizing or spray the surface of available low power (10 W middleweight) CO2 laser print out clear markers.

Laser marking technology applied to industrial processes

Laser Marking technology as a modern method of precision machining, and corrosion, EDM, mechanical characterization, and printing traditional processing methods, compared to the unmatched advantages: 1, done by laser processing means, and no processing of the workpiece between the role of a non-contact, non-cutting force, the advantages of small heat-affected, and ensure the accuracy of the original parts. At the same time, the adaptability of the broader material, in a variety of materials can be produced very fine surface markings and very good durability. 2, the space control and laser controlled good time, the object of the processing materials, shape, size and processing environment of freedom are great, especially in the use of automated processing and special processing. And the processing is flexible, and can adapt to the individual laboratories for the design needs, but also meet the requirements of the industrialized mass production. 3, laser characterization fine lines can be achieved mm and micron, laser marking technology and the production of counterfeit markings are very difficult to change, the product security is extremely important. 4, laser processing systems and CNC technology can be a highly effective combination of automated processing equipment, could play all kinds of text, symbols and designs, easy-to-design software design marking, labeling changes, adapt to modern production of high-efficiency, fast-paced requirements. 5, laser processing no sources of pollution, is a clean and pollution-free environment-friendly processing technology. Laser Marking technology has been widely used in industries, for high-quality, efficient, non-polluting and low-cost production of modern processing and opened vast vistas. With the application of modern laser marking the continuous expansion of the area of the laser manufacturing equipment system of small, high efficiency, and integration of the requirements of increasingly high, the new high-efficiency fiber-optic laser technology, successful development, this will certainly have a very big impetus.

Laser Marking Technology in the application marked Aluminum

Aluminum industry Stenciling Unit on the first inkjet printing products company profiles of the markings, security processing, has the following shortcomings: 1, unable to provide permanent marker. 2, prone to hardening caused dust ink inkjet head plug, it is necessary to regularly clean pipes. 3, the high cost of operating supplies. Laser marking: Profiles on the laser jet's trademark, was well on the market, greatly reducing the number of small businesses run defense. Process: Extrusion ingot from a round white wood, white wood from the sandblasting after electrophoresis, or direct oxidation of wood, white wood powder spray directly after surface treatment, that is, electrophoresis wood, oxidized material, powder spray three wood Aluminum common market. In general, white wood with laser marking, laser at the same time the 5-, marking time for about 4-5 seconds, and again after the Road electrophoresis or oxidation processes with the formation of a watermark similar to the effect of the renminbi, to the security Objective. Not in the direct oxidation products electrophoresis wood or wood on the marking, first, because they finished after marking a surface coating damage, and affected the corrosion resistance, and second, because the laser marking process in the middle, some small factories to buy Laser Marking Machine trademark-run, the existence of the equipment before and after the procedure with the laser marking equipment at the same time as a false instrument was confiscated risks, in terms of the Southern aluminum fabrication is to raise the threshold. Powder sprayed on the line for laser marking, taking into account powder spray thick layer of the grave marker of coverage, resulting in marked unclear. Power marked increase will seriously affect the life of the semiconductor. Lengthened marking time will seriously affect productivity. To address this situation, I propose two companies solutions: Option 1, I recommended that the powder spray later YAG marking. Because the high-expansion can be seen under the microscope by semiconductor YAG laser marking machine a layer of powder no damage, which is YAG laser wavelength with the photochemical reaction from the powder layer, it just changed the color. Therefore, I recommended that the semiconductor YAG laser marking machine after playing in the powder spray, because current can be controlled in about 12 A (currently electrophoresis timber and wood of the current marking around 18 A), can greatly extend the life of semiconductor modules, can greatly reduce equipment maintenance rate, and time can be shortened in about one second, their production has increased dramatically rhythms. Option 2, I recommended that the powder spray later in the CO2 laser marking machine marking. In the high-expansion can be seen under the microscope with CO2 laser marking machine is a powder-destructive, CO2 laser wavelength of the ignition of the powder layer results, but because the laser energy can be controlled, so the depth of damage can be in the control of the profile does not affect the scope. After pitting corrosion test (in the laboratory simulation of natural acid-base corrosion), verify this conclusion. Therefore, we proposed to use CO2 in the powder spray after fight, a laser energy through the control of the coating can damage control in the acceptable range. The time can be shortened in about one second, their production has increased dramatically rhythms. 3 CO2 laser imports for the whole of sealed maintenance-free products, equipment removed from water-cooled air-cooled machine, greatly reducing equipment maintenance rate. 40 30 W and can be used 10 W imports of CO2 lasers, and greatly reduced equipment prices. Electrophoresis of the wood or wood, Marking, is also pushing the 100 W lamp-pumped, not pushing 50 W semiconductor, semiconductor laser module to resolve user environment in the life of the issue, while meeting the user more clearly marked effect of the request .