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Laser Beam Welding (LBW) is a new type of fusion welding method that radiate a high-intensity laser beam to the metal surface, and the metal is melted to form welding through the interaction of the laser beam and the metal. It uses the principle of atomic stimulated radiation to stimulate the working substance (laser material) to produce a laser beam with good monochromaticity, strong directionality and high intensity. The highest energy density of the focused laser beam can reach 1013w/cm2, which converts light energy into heat energy in a few thousandths of a second or less, and the temperature can reach more than 10,000 degrees Celsius. This high-energy laser pulse is used to treat the material. For local heating in a small area, the energy of laser radiation diffuses into the material through heat conduction, and the material is melted to form a specific molten pool, thereby achieving the purpose of welding. Laser welding is mainly used for the welding of thin-walled materials and precision parts, and can realize spot welding, butt welding, stitch welding, sealing welding, and more.
Laser welding is a process that uses the radiant energy of the laser to achieve effective welding. Its working principle is to excite the laser active medium (Fiber, CO2, YAG) in a specific way, so that it oscillates back and forth in the resonant cavity, thereby forming stimulated radiation When the beam is in contact with the workpiece, its energy is absorbed by the workpiece, and welding can be performed when the temperature reaches the melting point of the material.
Laser welding can be divided into heat conduction welding and deep penetration welding. The heat of laser heat conduction welding diffuses into the workpiece through heat transfer, and only melts on the surface of the weld. The interior of the workpiece is not completely penetrated, and there is basically no vaporization phenomenon. It is mostly used at low speeds. Welding of thin-walled materials. Laser deep penetration welding not only completely penetrates the material, but also vaporizes the material to form a large amount of plasma. Due to the large heat, a keyhole phenomenon will appear at the front of the molten pool. Laser deep penetration welding can completely penetrate the workpiece, and has large input energy and fast welding speed. It is currently the most widely used type of laser welding.
Laser welding machine is a power welding tool used to join pieces of metal or thermoplastics through the use of fiber laser beam. The fiber laser beam provides a concentrated heat source, which is used for spot welding, butt joint, lap joint, lap edge, lap, T butt, seam welding, narrow welds, deep welds, and kissing weld with high welding rates. The process is frequently used in high volume applications using automation, such as in the automotive industry. It is based on keyhole or penetration mode welding. Fiber lasers can be used for a variety of applications from welding very small parts together commonly used by manufacturing businesses in the engineering, medical and electronics industries, through to welding thicker materials in the automotive and aerospace industries. Fiber lasers are a versatile, low cost way of achieving high quality spot welds. A laser welding machine is also known as laser beam welding machine, laser welder, laser beam welder, laser welder machine, laser beam welding equipment, laser beam welding gun, laser beam welding tool, seam welding machine, laser bonding machine, laser brazing machine, laser joining machine, laser soldering machine.
Laser welders are widely used in manufacturing, shipbuilding industry, automotive industry, battery industry, aerospace industry, jewelry, biomedicine, powder metallurgy, electronics industry, IT industry, electronic devices, optical communication industry, sensor industry, hardware industry, automobile accessories industry, glasses industry, porcelain teeth, solar energy industry, electric heating industry/thin-wall materials, precision parts manufacturing. It can realize spot welding, butt welding, stitch welding, sealing welding and so on. Laser beam welding is especially suitable for welding miniature, densely arranged, precise, and heat-sensitive workpieces.
The main application areas of laser beam welding are welding manufacturing in the processing of automobiles, aerospace, and ships. Taking automobile manufacturing as an example, laser beam welding has achieved large-scale, and related automatic production lines and welding robots have appeared. According to relevant statistics, in developed industrial countries in Europe and America, 50% to 70% of auto parts are processed by laser processing. Among them, laser welding and laser cutting are mainly used, and LBW has become a standard process in the automotive industry. my country's automobile industry has also begun to attach importance to this advanced welding technology. For example, Shanghai Volkswagen, which was the first to use LBW technology, has used LBW technology on the body of a newly launched multi-function car to reach 41 meters. In the automotive industry, laser technology is mainly used for body tailor welding, welding and parts welding.
The laser used in the welding of car body panels can weld metal plates with different thicknesses and different surface coatings together, and then press them, so that the panel structure made can achieve the most reasonable metal combination. Since there is little deformation, secondary processing is also omitted. Laser beam welding speeds up the process of replacing forged parts with body stamped parts. The use of LBW can reduce the overlap width and some strengthening parts, and can also compress the volume of the body structure itself. This alone can reduce the weight of the body by about 50kg. Moreover, LBW technology can ensure that the solder joints are connected to the molecular level, which effectively improves the rigidity and collision safety of the car body, and at the same time effectively reduces the noise in the car.
Laser tailor welding is in the design and manufacture of the car body. According to the different design and performance requirements of the car body, different specifications of steel plates are selected, and the manufacture of a certain part of the car body, such as the front windshield frame and the door inner panel, is completed through laser cutting and assembly technology. , Underbody, center pillar, etc. Tailor-made laser beam welding has the advantages of reducing the number of parts and molds, reducing the number of spot welding, optimizing the amount of materials, reducing the weight of parts, reducing costs, and improving dimensional accuracy. However, LBW is mainly used for the welding of the frame structure of the car body, such as the welding of the top cover and the side car body. The traditional welding method of resistance spot welding has been gradually replaced by laser welding. With laser welding technology, the width of the joint surface between the workpiece connections can be reduced, which not only reduces the amount of plates used but also improves the rigidity of the car body. It has been adopted by some of the world's major automakers and leading parts suppliers that produce high-end cars.
In aircraft manufacturing, it is mainly used in the splicing of large aircraft skins and the welding of skins and long trusses to ensure the contour tolerance of the aerodynamic surface. In addition, beam welding technology is also widely used in the assembly of fuselage accessories, such as the wing box of ventral fins and flaps. Later, the LBW technology is used to complete the welding and splicing in three-dimensional space. Not only the product quality is good, the production efficiency is high, but the process reproducibility is good, and the weight reduction effect is obvious.
In the jewelry industry, LBW can satisfy aesthetics and welding between different materials. It has been widely used in gold and silver jewelry repair holes, spot welding holes, welding inlays, etc.
The cladding technology in LBW has become the main technology for mold repair. The aviation industry uses this technology to repair the heat-resistant and wear-resistant layer of aero-engine nickel-based turbine blades. Compared with other surface modification methods, laser cladding has fast heating speed, less heat input, minimal deformation, high bonding strength, low dilution rate, precise control of the thickness of the modified layer, good localization, good accessibility, high productivity.
Other industries such as mobile phone batteries, electronic components, sensors, clocks, precision machinery, and communications have introduced LBW technology.
Due to the high investment in equipment, laser welding is currently only used in high value-added fields. Even in these fields, LBW has not been fully utilized for a long time. However, with the development of new laser beam welding technology and equipment, LBW is gradually squeezing into the "territory" occupied by traditional welding technology for a long time.
Laser Deposit Welding
Repair and modification with reconditioned quality.
Spot and Seam Welding
From smallest welding spots to continuous seams.
No time loss by movement of workpieces or processing heads.
Welding of Polymers
Flexible Method for High Strength Connections with Perfect Surfaces.
Tube and Profile Welding
Optimal laser beam welding of tubes and profiles.
Laser beam welding is a heat conduction process. The surface of the workpiece is heated by laser radiation, and the laser energy is controlled to be highly concentrated in a certain small range of spot. The surface heat is diffused to the inside through heat conduction, and the width, energy, peak power and repetition frequency of the laser pulse are controlled by parameters to melt the workpiece and form a specific molten pool. Compared with traditional argon arc welding, laser beam welding has a natural advantage and is widely used in the fields of industrial electronics, automobile manufacturing and aerospace and other precision mechanical parts.
1. Since the focused laser beam has a much higher power density than the conventional method, the welding speed is fast, and the heat-affected zone and deformation are smaller.
2. Because the laser beam is easy to transmit and control, and there is no need to change the welding torch and nozzle frequently, it significantly reduces the auxiliary time of shutdown, so the load factor and production efficiency are high.
3. Due to the purification effect and high cooling rate, the welding seam is strong and the overall performance is high.
4. Due to the low balance heat input and high processing accuracy, reprocessing costs can be reduced. In addition, the moving cost of laser beam welding is relatively low, which can reduce production costs.
5. It is easy to realize automation, and can effectively control the beam intensity and fine positioning.
6. Minimum heat input. Because the temperature of the source cavity is very high, the melting process takes place extremely fast, the heat input to the workpiece is extremely low, and the thermal deformation and heat-affected zone are small.
7. The energy density is large and the release is extremely rapid. It can avoid thermal damage and welding deformation during high-speed processing, and can process precision parts and heat-sensitive materials.
8. The material to be welded is not easy to be oxidized and can be welded in the atmosphere without gas protection or vacuum environment.
9. The laser can directly weld insulating materials, and it is easier to weld dissimilar metal materials, and can even weld metal and non-metal together.
10. The laser beam welding machine does not need to be in contact with the workpiece to be welded. The laser beam can be bent or focused in any direction with a mirror or a deflection prism, and it can also be guided to hard-to-reach places for welding with optical fibers. The laser can also be focused through transparent materials, so it can weld joints that are difficult to access by normal methods or joints that cannot be placed, such as welding electrodes in vacuum tubes.
11. The laser beam will not bring any wear and tear, and can work stably for a long time.
There are three main types of laser welding, including CO2 gas laser welding, YAG solid laser welding, and fiber laser beam welding. There are high-power laser welders for large-format and thick sheets, and low-power laser welders for small-size parts. There are welders for welding metals and non-metallic materials such as plastics and ceramics.
Different laser welding methods can be classified as follows:
1. Welding between slices. Including butt welding, end welding, center penetration fusion welding, center perforation fusion welding and other four process methods.
2. Wire and wire welding. Including wire-to-wire butt welding, cross welding, parallel lap welding, and T-type welding.
3. Welding of metal wires and block components. Laser beam welding can successfully realize the connection between the metal wire and the block element, and the size of the block element can be arbitrary. Attention should be paid to the geometric dimensions of the wire-like components during welding.
4. Welding of different metals. Welding different types of metals must solve the range of weldability and weldability parameters. Laser beam welding between different materials is only possible with certain material combinations.
$12800.00 - $328000.00
Handheld laser welding machine features the best fiber laser beam, high welding speed and high quality welding seam without consumables. The handheld laser welder is used for welding carbon steel, stainless steel, aluminum, brass, copper, iron, silver, gold, and more sheet metals and metal tubes. The portable handheld fiber laser welding machine will take over the traditional argon arc welding, MIG & TIG welding, and electric welding.
$48000.00 - $58000.00
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