Laser engraving is the most popular advanced marking method globally, which is very suitable for modern production (high efficiency and fast pace). This technology has already proven to be a user-friendly as per the need ), surface alloying and other surface modification. Compared with blanking cutting, the processing surface is smooth, and there is no obvious blade trace in the blanking machining curve. Laser welding (figure 3) is an important field of laser technology. (3) No electrodes are needed, no contamination or damage concerns. During laser melting cutting, the metal material is melted by laser heating. Current Applications 19. A fiber laser generator uses a glass fiber doped with rare earth elements as a gain medium. There are thousands of items that have been laser marked or laser engraved. (5) When using high energy laser beam welding, plasma controller is used to removing the ionized gas around the molten pool to ensure the reconstruction of the welding channel. In optical fibre communications, lasers are used as light source to transmit audio, video signals and data to long distances without attenuation and distortion. The energy of the laser radiation diffuses through the heat conduction to the material, and the material is melted down to form a specific molten pool. In the mid-20th century, laser technology came out. The operator must wear special protective glasses during operation. Under the action of pump light, high power density can easily be formed in the optical fiber, which causes the laser energy level of the laser working substance to “reverse the number of particles”. Lasers are widely used in manufacturing, e.g. The cutting quality is very poor especially in processing the thick plate and the complex curve shape plate. Most laser applications fall into one of a few broad categories: (1) transmission and processing of information, (2) precise delivery of energy, and (3) alignment, measurement, and … Semiconductor lasers can also be used for this purpose. In astronomy, lasers have been used to create artificial laser guide stars, used as reference objects for adaptive optics telescopes. Because the plate is stationary during processing, it also avoids the scratch when the plate surface moves. He loves writing and focuses on sharing technical information, guidance, detailed solutions and thoughts related to metals and metalworking. It can be used for metal surfaces modification treatment such as harden metal (or it is called surface quenching, surface amorphous, surface re-melting and quenching. Laser in Garment Industry 20. It can be seen from this that the advantages of laser marking technology are very obvious. Laser engraving works with a laser beam with extremely high energy density under the control of the computer, irradiate the surface of the product which required marking to make the surface of the product melt or vaporize instantly, thus marking the product surface with the required text or logo, as shown in figure 4. Another widespread urological application is … The light signals can be modulated with the information to be sent by either light emitting diodes or lasers. Laser Institute of America (LIA), founded in 1968, is the professional society for laser applications and safety. As the oxidation reaction in the cutting process produces a lot of heat, the energy required for laser oxygen cutting is only 1/2 of the melting cut. Laser rapid prototyping (FIG. Laser, a device that stimulates atoms or molecules to emit light at particular wavelengths and amplifies that light, typically producing a very narrow beam of radiation. After laser treatment, the surface hardness of cast iron can reach 60HRC, and carbon steel with medium carbon and high carbon can reach up to 70HRC. Traditional cutting techniques include gas cutting, machining cutting, blanking cutting, plasma cutting, etc. The output is not visible light, which causes severe damage to the retina and skin. Laser Tattoo Removal 15. Rapid prototyping provides a richer, more intuitive entity than the information provided by the drawings and computer screens. RP-Rapid Prototyping technology is a manufacturing method that accumulates the material layer by layer. (7) Fast solidification of the weld bead, may have stoma and embrittlement. Laser cutters are credited with keeping the U.S. garment industry competitive in the world market. The core part of laser cutting is a laser generator, include CO2 laser and the fiber laser generator. The development and development of new products save a lot of precious time and reduces the production cost. According to statistics, the thickness of the cut aluminum alloy is not more than half of the black metal. for cutting, drilling, welding, cladding, soldering (brazing), hardening, ablating, surface treatment, marking, engraving, micromachining, pulsed … Although the cutting speed is fast and the cutting thickness is large, the cutting size precision is obviously not good. Cutting copper alloy effect is worse, especially cutting copper. (6) Energy conversion efficiency is too low, usually less than 10%. The atoms in the mixture are stimulated to release energy, and the energy is output in the form of photons or electrons to form a laser. (8) Easy to weld in high-speed and automatically, or controlled by digital or computer. From the current situation of the laser cutting machine in the market, the effect of laser on cutting black metal is better. 5) is a major change in modern manufacturing technology. The first three cutting methods are the main application of laser cutting. CO2 laser engraving Designs Laser Textile Stitching 21. It uses the laser as the preheating source and uses the oxygen and other active gases as the cutting gas. The usefulness of the laser for such cutting operations comes from the fact that the beam is highly collimated and can be further focused to a microscopic dot of extremely high energy density for cutting. Kanji Aoada, Yasutaka Ytani, Akira Sakawa and Akira Shimazu - Department of Orthopaedic Surgery, Osaka City University Medical School, Japan 10 Efficacy Of Low Power Laser Therapy In Fibromyalgia: A Single-Blind, Placebo-Controlled Trial Medical Uses of Lasers. At the same time, the manufacturing industry needs to meet the ever-changing needs of the users, and also requires the manufacturing technology to be more flexible, which can be produced in small batches or even single parts without increasing the cost of the product. Computer controlled laser garment cutters can be programmed to cut out 400 size 6 and then 700 size 9 garments - and that might involve just a few cuts. At the same time, the workpiece is cut off by blowing the molten material with the high-speed airflow with the same axis of the beam. is sprayed by the nozzle of the same axis with the beam. Traditional cutting techniques include gas cutting, machining cutting, blanking cutting, plasma cutting, etc. (11) Two kinds of metals in different properties can be welded, such as different resistances. Laser vaporization is mainly used for cutting of extremely thin metal materials and non-metallic materials. The right solution for any application. Laser technology is expanding in new application fields, and the development speed is amazing. Shiv C. Dass, in Coloring Technology for Plastics, 1999. Although plasma cutting is more efficient, the cutting section is better than that of the above methods, but the cutting precision can only reach the millimeter level. Through his articles, users can always easily get related problems solved and find what they want. Your email address will not be published. INTRODUCTION. Two of the most common applications that lasers can also perform are laser marking and laser engraving. At the same time, the production of a single and small batch of precision castings can be used without the mold, thus saving a lot of tooling costs and greatly shortening the production cycle. (2) When the welding parts need clamps, must ensure that the final position of the weld is aligned with the welding spot where will be impacted by the laser beam. Heat treatments for hardening or annealing have been long practiced in metallurgy. And because it does not belong to the contact welding process, the loss and deformation of the fixture can be minimized. The second largest application is fiber-optic communication. Telephone fiber drivers may be solid state lasers the size of a grain of sand and consume a power of only half a milliwatt. The above figure shows a simplified construction of a laser diode, which is similar to a light emitting diode (LED).It uses gallium arsenide doped with elements such as selenium, aluminium, or silicon to produce P type and N type semiconductor materials.While a laser diode has an additional active layer of undoped (intrinsic) … (10) It is not affected by the magnetic field (arc welding and electron beam welding is easy to be affected), can accurately align the welding parts. ... technologies and application of … Although the machini… The laser oscillator output can be formed when the positive feedback loop is added in due course. (9) When welding thin material or thin diameter wire, it will not be as easy as arc welding. The CO2 laser can not cut high reflective metal plates. Laser processing is employed in many branches and Fields of application. This page shows an overview over the fields of application. Especially in the stage of product development, considering various factors comprehensively and use the rapid prototyping technology to enable the development to be successful at once. In the main large manufacturing, such as automobiles, electronics, machinery, aviation, steel and other industries, some countries have basically completed the changes from traditional processing technology to laser processing and enter into the era of “light”. Applications in Medical applications, welding and Cutting, surveying, garment industry, laser nuclear fusion, communication, laser printing, CDs and optical discs, spectroscopy, heat treatment, barcode scanners, laser cooling. Just to name a few, the lasers are used in medical procedures, surgery, cutting, drilling, welding, soldering, alignment, product marking and coding, etc. A nearly impossible task for conventional welding because of the great difference in thermal conductivities between stainless steel and copper, it is done so quickly by the laser that the thermal conductivities are irrelevant. A change in surface composition, organization, and performance that is not achieved by the large surface quenching. Laser welding is the main welding process in the manufacturing of high-speed railway and automobile. (6) The laser beam can be focused on a small area and can be soldered with small and spaced parts. It plays an increasingly important role in improving product quality, labor productivity, automation, reducing pollution and material consumption. Laser processing technology (FIG. The principle of laser oxygen cutting is similar to that of oxyacetylene cutting. 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