As a surface modification technology of metal materials, laser cladding can effectively change the hardness, wear resistance, corrosion resistance and high temperature resistance of metal surfaces. For more than half a century, the technology has been continuously improved and developed in practical applications. In addition to materials and processes, high power laser pointer and powder feeding technologies have been continuously upgraded. In the 1980s and 1990s, cladding lasers were mainly CO2 lasers and YAG lasers. After 2010, semiconductor lasers (both direct output and fiber coupled output) appeared. In recent years, fiber lasers have begun to compete for the cladding market of semiconductor lasers.

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At the same time, people are constantly exploring ways to improve the function of powder and laser, and invented a variety of powder feeding techniques, including preset powder feeding, side-by-side feeding and center feeding. The preset powder feeding adopts the powder laying or gravity powder feeder to preset the powder on the path through which the spot passes. The preset powder feeding technology is simple, the powder feeding process has no powder splash, the powder utilization rate is high, but the versatility is not strong. The side-by-side powder feeding adopts pneumatic method to send the powder into the spot, the side-by-side powder is divided into asymmetric side feeding powder and symmetric coaxial feeding powder, and the side feeding powder is easily affected by the moving direction, and the cladding quality is relatively high. difference. Coaxial powder feeding has good quality and versatility. Coaxial pneumatic powder feeding is a “powder-packing” technique that uses a multi-beam converging powder stream or a ring-shaped converging powder stream to surround the central military laser pointer beam. The center powder feeding is also a pneumatic powder feeding method. It is a kind of "optical powder coating" technology, which is designed to surround the center powder flow by designing a hollow beam.

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Ultrafast lasers concentrate light energy in picosecond to femtosecond time intervals and focus light into areas of ultra-fine space that are smaller than the diameter of the hair, making the intensity of the electromagnetic field stronger than the force of the nucleus to its surrounding electrons. It is several times higher, and many other methods that do not exist on the earth can not achieve extreme physical conditions. At the same time, the laser energy is concentrated in such a short period of time, and a huge single pulse energy and a very high peak power are obtained. The high power density laser pulse can easily strip the outer electrons, and the electrons are separated from the atoms and form a plasma.

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Since the interaction time between the laser and the material is extremely short, the plasma has not been able to transmit energy to the surrounding material, and has been ablated from the surface of the material, which can largely avoid the melting of the material due to the long pulse width and low intensity astronomy laser pointer. And the continuous evaporation phenomenon (heat effect) ensures that the surrounding materials in the space range involved are not affected during the processing, and the processing quality is greatly improved. Ultrafast laser processing is therefore also referred to as "cold processing."

In addition, the non-contact processing of the laser can avoid the problems of chipping and cracking in the traditional machine-added cutting, high precision, no micro-cracking, chipping or chipping problems, high edge crack resistance, and edge maintaining optical performance. It does not require secondary manufacturing costs such as rinsing, grinding, polishing, etc., and reduces the cost while greatly improving the workpiece yield and processing efficiency.

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In recent years, high-speed laser cladding as a new laser cladding technology has attracted widespread attention in various industries such as coal mines, steel, petrochemicals, and electric power. Recently, Zhongke Zhongmei successfully used powder feeding in high-speed green laser pointer cladding technology. They used multiple lasers to wrap the center powder, and the powder melted on the molten pool and fell into the molten pool.

Compared with the coaxial pneumatic powder feeding, the central powder feeding is characterized in that the powder is a single powder flow, and there is no mutual impact scattering of the powder flow in different directions. In addition, in the vertical down-cladding process, a lower powder feed pressure can be used, so that on the one hand, the powder flow rate is relatively slow, the powder and the laser act for a long time, and the powder is more easily melted over the molten pool. On the other hand, the lower powder flow rate also reduces the ejection between the powder flow and the substrate. The practical application shows that the splash of the high-speed cladding cladding process in the center powder feeding is obviously reduced, the spark is quite gentle, and the powder utilization rate is greatly improved.

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As an important part of additive manufacturing technology, laser cladding technology is a new advanced green manufacturing technology that replaces traditional surface treatment technology. The utility model utilizes a high-energy waterproof laser pointer as a heat source, simultaneously melts the high-performance powder and the base material of the part, and forms a surface cladding layer with wear resistance and corrosion resistance on the surface of the part, which not only improves the use performance of the parts, but also prolongs the service life by two. three times. Laser cladding technology is mainly used in the surface treatment of large high-value parts, especially in the surface treatment of large iron-based rotary parts. At this stage, the related technical processes have become mature for the cladding processing of the outer surface of the part, and a wide range of applications have been realized. However, the laser cladding process for the inner wall of the part, especially the inner surface of the thin-walled part, has been the bottleneck of the application of this technology.

Since the early 1980s, the automotive industry has been one of the main drivers of the high-power laser industry. This industry has strict requirements on the quality and reliability of laser sources. Compared to traditional manufacturing techniques, laser technology can bring greater benefits in the areas of cutting, welding and marking. Because 18650 laser pointer technology is more flexible than traditional technology and easy to automate, it can meet the core requirements of the entire industry. In the beginning, the laser was only used for simple cylindrical part welding, such as the automatic transmission components of a vehicle. Nowadays, lasers have been widely used in the process of processing the entire vehicle structure. Roof welding, door welding, three-dimensional cutting of hydroformed parts, door spring annealing, instrument panel welding, marking, etc. are just a few examples of a large number of laser applications. With the development of lightweight vehicles, new materials, new structures and new processes are constantly emerging, and the safety performance of automobiles is continuously improved.

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Laser ranging technology is the first laser technology to be practically applied in the military. In the late 1960s, laser rangefinders began to be equipped with troops, which were widely used for reconnaissance surveys and weapon fire control systems because of their ability to quickly and accurately measure target distances. Laser guided weapons have high precision, simple structure, and are not susceptible to electromagnetic interference, and they play an important role in precision guided weapons. The astronomy laser pointer communication has large capacity, good confidentiality and strong anti-electromagnetic interference capability. Optical fiber communication has become the development focus of communication systems. Airborne, spaceborne laser communication systems and laser communication systems for submarines are also under development.

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A tactical laser weapon made of a high-power laser can blind the human eye and disable the photodetector. stage. Anti-satellite and anti-continental ballistics using high-energy laser beams may destroy military targets such as aircraft, missiles, and satellites. The application of strategic laser weapons that are close to practical missiles is still in the exploratory stage. Due to the small laser spot, high energy density, and fast cutting speed, laser cutting can achieve better cutting quality and extremely high cutting speed and efficiency, while reducing tool wear. The use of laser welding materials can avoid deformation, increase the type of welding materials, eliminate environmental factors, high quality and efficiency.

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The use of military laser pointer technology welding, its advantages are extremely high welding speed, stable welding quality, high welding precision, small thermal deformation of materials, and easy to integrate into the automation operating system, which is widely used in modern industrial production, with excellent reputation. Advanced welding methods. Laser welding has been widely used in automobiles, such as welding of automobile bodies, pipe welding, welding of automobile batteries, and plastic welding of instrument panels. Lasers have unique advantages in terms of welding strength and welding precision and speed.

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Laser cutting is also one of the most frequently used laser applications. Fiber lasers and CO2 lasers can be combined with standardized 2D and 3D cutting systems to cut low carbon steel, stainless steel, aluminum and other metals. When processing different parts of a car, car manufacturers take advantage of the advantages of laser cutting, such as high cutting edge quality, low heat input, and fast processing speed. Automotive parts and materials, including a variety of metals, such as airbag fabrics and composite materials used in automotive interiors, are cut using a laser. As a flexible processing tool, the laser can be easily integrated into robots and other automation devices and provides solutions for the cutting of various automation components and materials.

In addition to traditional processes such as laser cutting and laser welding, lasers can also be used in a variety of surface treatment applications such as 532nm laser pointer hardening, laser de-layering, surface activation, and laser surfacing. In the laser surfacing process, the most well-known is laser cladding. The basic materials such as metal wire or powder can be melted by laser radiation to achieve metallurgical bonding. The dilution rate of the metal of the parent component is less than 5%. . The automotive processing industry usually uses powder for laser surfacing, which can be used as a protective film for workpieces to prevent wear and corrosion, as well as high temperature and corrosion resistance (liquid). In the automotive industry, the minimum distortion rate and high flexibility of the workpiece are two important criteria. Thermal microcracking and porosity are also avoided due to reduced heat input and the use of additive materials.

With the development of laser technology, the reliability of laser welding equipment is improved, manufacturers no longer worry that laser welding equipment will affect the normal operation of the production line. Currently, laser equipment equipped on the automobile production line can run continuously for 24 hours, and the failure rate is very high. low. Modular design is now used, maintenance is also very convenient, technical requirements for maintenance personnel are not high, and repair time is very short. Due to the high-speed continuous operation of the laser welding equipment, the investment recovery time of the laser welding equipment is shortened, which not only improves the productivity, but also improves the quality of the automobile. The laser technology will also bring great economic and social benefits.

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Laser welding is the most widely used laser welding technology in the automotive industry, as well as 488nm laser pointer marking technology and laser cutting technology. Laser welding uses a high-energy-density laser to illuminate the material connection at a material source, so that the separated material absorbs the laser energy and then rapidly melts or vaporizes and forms a molten pool together, which solidifies together and then joins together in the subsequent cooling process. There are two common types of high-power lasers for laser welding: CO2 lasers and solid/fiber lasers. The former has a wavelength of 10.6 μm or a wavelength of 1.06/1.07 μm, which is invisible to the naked eye.

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The automotive industry uses a large number of laser-welded steel sheets and unequal-thickness steel plates to make full use of the excellent properties of laser welds. After welding, it is stamped and formed without cracking. On the one hand, for the steel parts with insufficient width, the parts of the car body are welded after welding, because the different parts of the car body are different in force, and the requirements on strength and rigidity are also different. In order to reduce the weight of the car body, the thickness is often selected according to the actual needs of each part. Different types of steel or different surface treatment methods are laser welded together as a blank before stamping. Compared with the old process, the integration of a plurality of punching sheets reduces many punches, so that not only the weight of the vehicle body is reduced, but also the cost is lowered. In addition, bumpers, body frames, and ribbed parts can be used to replace the old process.

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The common welding principle is actually liquefying the metal, then cooling it and then dissolving it together. The body of the car is welded by four steel plates from top to bottom and left and right. The ordinary welding is spot welding, and the steel plates are connected together by one welding point. Laser welding is the physical principle of using the high temperature of the waterproof laser pointer, disrupting the molecular structure of the two steel plates, and rearranging the molecules to dissolve the molecules in the two steel plates. The actual operation is to use a polarizer to reflect the laser beam, so that it concentrates on the beam that produces great energy from the focusing device. The laser beam has a diameter in the range of 0.2-0.6 mm at the focus point, and a light intensity exceeding 106-108 watts/cm 2 is obtained, the focus is close to the workpiece, and the surface of the workpiece reaches a physical change of the fusion bond. Therefore, laser welding turns two steel sheets into one steel sheet, so it has higher strength than ordinary welding.

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In the manufacturing process, the car has high precision, high deformation, small heat, small flaws, high weld quality, no solder, high efficiency welding speed and welding quality, ensuring low cost operation and unconditional high feasibility in the car. In the industry, the welding of welded parts, the welding of the body parts and the welding of parts are realized.

Auto parts can reduce the number of parts and molds by military laser pointer welding, reduce the number of spot welds, optimize the amount of materials, reduce the weight of parts, reduce the cost and improve the dimensional accuracy. The strength of the steel plate after laser welding will increase by more than 30%; The width of the joint surface can be reduced, the use of the sheet material is reduced, and the rigidity of the vehicle body is improved; the welded parts of the automobile itself are free from deformation, the welding speed is fast, and the welding machine does not require heat treatment, and the flexibility is strong. The advantages of high-strength weld bead strength and high speed are realized.

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Although the strength of the resistance spot welding head is better than laser welding, it is still higher than the metal base material. The weakest part of the overall welded body is the welding heat affected zone on the base metal. That is to say, the metal base material is the weakest link, so once the body is subjected to strong external force, in most cases, the metal base material is destroyed, not the welded joint. It is precisely because of the existence of the short plate of the metal base material that the strength of the laser welded body and the resistance spot welded body is almost indistinguishable. Therefore, the usb laser pointer welded body is not more safe than the resistance spot welding body when it is affected by external force.

Experiments show that high-brightness fiber lasers can overcome all the known problems in copper welding applications. The high power density achieves instantaneous coupling and formation of keyholes, enabling stability and high absorptivity even at 1070 nm. With a high dynamic beam swing, the welding process is very stable, thereby reducing or avoiding stomatal and splashing phenomena, resulting in high quality welds. The process parameters set for the swing of the beam enable the weld geometry to be controlled, resulting in a very shallow weld in the deep weld process. The use of long pulse quasi-continuous fiber laser, even in a single pulse through the beam high-speed dynamic movement to complete the spot welding. In this way, high-quality welds can be created by increasing the pulse at a very low average power.

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Laser flight welding technology through the blue laser pointer beam incident to the scanning galvanometer X, Y axis of the two mirrors, the computer control the angle of the mirror to achieve any deflection of the laser beam. Through the linear movement of the negative lens, the focal position in the Z direction to produce a certain range of adjustment, through a certain power density of the laser to be processed in the workpiece surface to be processed at different locations to achieve welding connection. Galvanometer group of dynamic movement, so that the lens in the scanning lens laser beam quickly switch between the solder joints, focusing distance due to focusing lens, mirror small angle deflection can be achieved in the laser beam in the solder joints (seam) of the can be quickly switched, the positioning time is almost zero, which can achieve multi-point rapid welding.

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Because of its use through the robot arm and laser scanner to ensure that the welding process with the workpiece zero contact, the weld position can be flexible and changeable and large parts, complex surface of the rapid multi-point welding. This will not only reduce the excessive investment in welding equipment and the use of the site occupancy, reduce the cost of a single production, and welding the overall effect of stability. Based on the above advantages, laser pointer welding technology in addition to apply to the trunk lid, door, seat plate, dashboard support, seat adjustment and seat frame and other white body on the welding, but also in the aluminum, galvanized sheet and battery, plastic and other welding on the widely used.

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Around the processing technology, ultra-fast laser industry chain-related enterprises and research institutes are developing more stable performance, more cost-effective ultra-fast laser devices, beam space-time plastic transmission technology, combined with the best material processing technology and intelligent manufacturing combined with control technology. From the perspective of the extension of the industrial chain, the laser industry should look like this, by the 1 billion yuan output value of the laser, provoke 5 billion yuan output value of the green laser pointer processing system, and then provoke 50 billion yuan output value of the application area, so by 2020 ultra-fast laser industry chain scale can reach more than 70 billion US dollars in size.

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If the use of traditional methods of rust removal, the project is large and complex, and rust powder is not only harmful to the health of workers, but also seriously pollute the environment. The laser in this area but show their talents, you can quickly and easily remove the metal surface or corner of the corrosion, and also to prevent further oxidation. Laser rust as a new cleaning process, in the field of rust on the surface of carbon steel has a huge development prospects.

Laser deinterleaving as an efficient cleaning method, usually used in the field of macro industries. In the laser de-lacquer process, the laser acts on the paint coating, the paint coating in the pulse time to absorb the red laser pointer energy and convert it into heat so that the temperature of the paint in a very short period of time to achieve its gasification temperature in order to achieve the paint Effect.

Although ultrashort pulse red laser pointer emitting picosecond pulses might not achieve the required throughput rates.How to discuss their experiences in ultrashort pulse laser research.We are seeing many of the established laser manufacturers enter the systems market.Not only is it taking delivery of a record 60-kW laser weapon, but it’s also mounted a weapon-grade Army laser on a combat vehicle for the first time.
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Ultrashort pulse red laser pointer have for many years been the tool of choice for processing micromaterials.Once the project leads to a better understanding into how laser communication works.Command team members are laser focused on the future of high energy lasers.Don’t be afraid to laser your opponent.
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The combined fiber 300mw Laser Pointer uses multiple individual lasers that are focused together into a single beam.But it doesn’t have the best part: visible laser beams.Even if you fall on the more expensive side of the laser treatment.The latest of many attempts to rein in sea lice involves a software-and-camera-controlled underwater laser drone.
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This research will feed into the Dragonfire programme creating a 300mw Laser Pointer capable of becoming an alternative to missiles.HTPOW grew his cottage laser business into a nationwide network on its way to millions in sales.HTPOW continued to claim that his lasers could treat hundreds of conditions beyond osteoarthritis of the hand, and he continued to sell perhaps 10 additional laser models.

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The team could control the size of the bubbles by controlling the 200mw Laser Pointer parameters.A judge issued a temporary injunction against Lytle’s laser business while considering a permanent injunction.This laser may be the perfect way to neutralize them.The Navy is also planning on imbuing helicopters with lasers to protect against shoulder fired anti-aircraft missiles.
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Lasers have been a mainstay of sci-fi battles for decades.The weapon itself is a combined fiber 200mw Laser Pointer , which means it doesn’t actually fire one but two lasers condensed into one beam.It involves using an almost infrared laser for land-based terrain mapping, or bathymetric, which uses a green laser light to map the seafloor terrain through water.

We were able to verify and show that we could put a radar and a Laser Sight on a platform.While HTPOW laser delivers the energy for curing, its galvanometers (galvo) guide the laser beam to make precise movements.Since he and his colleagues control the electrons with another laser pulse.The laser show is just one of the eye-popping attractions at the museum.
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