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High Speed Laser Cladding Technology

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.

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.

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. .

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.

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.

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.

Advantages of Laser Cladding Technology

Compared to other cladding techniques (such as spray tungsten carbide, tungsten carbide spray plasma spray or arc welding), laser cladding is a unique process with fundamental differences in its application. The use of usb laser pointer cladding, a highly focused heat source, has a large impact on the finished product. Laser cladding has many advantages due to its low heat input, high cure rate and accurate process control.

All metallurgical bonding, no spalling, chipping, cracking: Laser cladding has a complete metallurgical bond with the substrate, which means it does not peel or crack like a plasma or thermal spray coating. Little or no voids or porosity: Unlike plasma or thermal spray, laser cladding coating is suitable for fully dense coatings. The low heat input process greatly reduces thermal distortion: laser cladding inputs less than 20% of the heat compared to arcs that cover the same part. The thermal deformation reduction of this component is significant. In many cases, in order to solve the thermal deformation problem, fewer subsequent operations, such as machining and straightening, are required. Thin-walled parts that cannot be covered with an arc can be coated with a 488nm laser pointer due to low heat and deformation.

green laser pointer

Small heat affected zone: Due to the reduced heat input, the heat affected zone is greatly reduced, increasing the strength of the component. Very low dilution: Low heat input also reduces the dilution of the cladding. Reducing the mixing of the base metal and the coating means a purer coating with better metallurgical properties and higher corrosion and wear resistance.

Release Cladding: Due to the lower dilution rate, a thinner coating (compared to arc welding) can impart the same wear or corrosion properties. This can significantly reduce the cost of cladding materials. High solidification speed: Since the solidification speed is fast and the heat input is low, materials such as carbides can be added to greatly improve the wear resistance of the coating. Conventional arc welding processes melt carbide particles. The ability to traditionally „non-weldable“ materials: low heat input and fast curing can be coated with materials such as carbon steel or nickel-based superalloys. These materials are difficult or impossible to weld using conventional welding techniques.

Excellent process control, better layer thickness control and surface treatment: waterproof laser pointer cladding provides better control of layer thickness, coating of thinner coatings and better surface finish. The ability to apply a closer net shape coating reduces the amount of finishing required and reduces the amount of excess coating material applied. Infinite Cladding Thickness: Multiple coatings can be applied to achieve any thickness. High repeatability and process stability: Automated control of the process provides excellent parameter control for good process stability and reliable, repeatable results.

High deposition rate: High deposition rates can be achieved, especially with hot wire technology, which can reduce application time. Greatly extend the life of parts: Compared to plasma or thermal spraying and arc welding, laser cladding has excellent corrosion resistance and wear resistance, which greatly extends the life of parts. One of the many advantages of the laser cladding process is that it is compatible with a wide range of material choices, either in wire or powder form; the options for material properties are almost endless.

Material selection: Powder offers virtually unlimited potential for changing alloy composition, allowing the use of carbides and other forms of wire that are not available. Material Capture: Unlike powders, when material is coated with wire filler material, no wasted material. Lower material costs: The cost of wire filler material is much lower than the same material in powder form. Unaffected by gravity: the wire is not affected by gravity and is not affected by the powder, so unsuitable coating can be achieved. 2-5 times higher deposition rate using hot wire: preheating the wire before it enters the bath reduces the laser energy required to melt the fill material, thereby achieving higher deposition using the same military laser pointer power rate.

Technical Essentials of Laser Hybrid Welding

Laser is a beam of light that uses a radiation excitation light amplification principle to produce a monochromatic, directional, and high-intensity beam that is focused by a transmission or mirror to obtain high-density power. It can be used as a heat source for welding, cutting and surface treatment of materials. Laser welding (LW) is a highly efficient and precise welding method that uses a high energy density 488nm laser pointer beam as a heat source. According to the different working characteristics of the laser generator, the laser is divided into solid, liquid, gas, semiconductor and other lasers; according to the laser’s action on the workpiece and the laser output energy, laser welding can be divided into continuous laser welding and pulse laser welding; Power density laser spot welding on the workpiece can be divided into heat transfer welding (through-fusion welding) and deep-fusion welding (keyhole welding, perforation welding, small hole welding).

The laser welding machine is mainly composed of a laser (core part, currently mainly YAG solid-state laser and CO2 gas laser), beam transmission and focusing system, welding torch, work table, power supply and control device, gas source, water source, and operating panel numerical control device. . Mainly used in aviation, electronic agenda, machinery, automotive, medical, food, nuclear energy and other fields.

green laser

Laser welding has its significant advantages: high power density (103W/cm2), small hole welding and high speed welding; laser energy emission, transmission, optical transmission, deflection, focusing through optical methods such as fiber optics, prisms, etc. For micro-parts, inaccessible parts or long-distance welding; one military laser pointer can be used for multiple work on different worktables (welding, cutting, alloying, heat treatment, etc.); laser can pass through transparent objects such as glass. Welding highly toxic materials such as bismuth alloy in sealed containers made of glass; laser is not affected by electromagnetic fields, no X-rays; lasers are not lost in the atmosphere, and vacuum protection is not required; in addition to welding carbon steel and low alloy steel , stainless steel, silicon steel, aluminum, titanium and other non-ferrous metals, under certain conditions, copper-nickel, nickel-titanium, copper-titanium, titanium-molybdenum, brass-copper, low carbon steel-copper, stainless steel-copper and other dissimilar metals The material can be laser welded or non-metal such as metal and ceramic, glass, composite materials, etc. For high melting point metals, non-metallic materials (ceramics, plexiglass, etc.), materials sensitive to heat input. Laser welding is performed without heat treatment after welding. Laser welding has not been widely used mainly: the price is too expensive; the welding parts processing, assembly, positioning requirements are high; the light energy conversion rate is low (10 to 20%).

In order to expand the application range of laser welding, improve the quality of laser welding, increase the thickness of weldments and avoid the limitations of pure laser welding, a new welding process has emerged: waterproof laser pointer hybrid welding. It is important to note that the advantages of laser re-welding are not just The superposition of two welding methods! In particular, the utilization of energy is much larger than the simple addition of two heat sources. The advantage of laser hybrid welding is that the energy utilization rate is improved, the absorption rate of the laser is low when the base material is in the solid state, and the absorption rate of the laser after melting is increased to 50-100%; the penetration depth is increased a lot under the action of the arc The base metal melts to form a molten pool, and the laser acts on the bottom of the arc, and the liquid metal absorbs the laser beam at a high rate. Therefore, the laser hybrid welding is larger than the pure laser welding; the arc is stable, such as separate When welding with TIG or MIG, the welding arc is sometimes unstable, especially in the case of small currents, when the welding speed is increased to a certain value, it will cause arc drift. When laser hybrid welding is used, the laser generated plasma helps to stabilize the arc. Improve the adaptability of butt joint clearance during laser welding, reduce the assembly precision of laser welding and achieve high efficiency.

Laser welding process parameters, pulse laser welding has four main parameters: pulse energy, pulse width, power density and defocusing; continuous green laser pointer welding parameters are: laser power, welding speed, spot diameter, defocus, protection The type and flow rate of the gas; the parameters of the two-beam laser welding include: beam arrangement, spacing, two beam angles, focus position, energy ratio of the two beams, and so on. Laser hybrid welding types include: laser-arc hybrid welding, laser-high frequency welding, laser-pressure welding, laser-brazing, etc. Among them, laser-arc welding is the most common, such as laser-argon arc welding (TIG), laser-gas Welding welding (MIG), etc. According to the relative position of the laser and the arc: coaxial composite, cross composite, deviated composite.

Used in deep plate welding of thick plates, thick plate welding is limited due to the strict assembly requirements of pure laser welding and the high cost of high power lasers. The laser-arc hybrid welding can be used for thick plate deep-fusion welding, and the adaptability to the preparation of the welding groove, the beam neutrality and the joint assembly gap can be improved. It is well applied in the shipbuilding industry. For low-alloy high-strength steel, it can be preheated and welded. The laser-arc hybrid welding can achieve a penetration depth of 15mm for single-pass welding and 30mm for two-way welding. The welding deformation is only double wire welding. 1/10, T-joint with a welding thickness of 16mm can be welded at speeds up to 3m/min.

Applied to usb laser pointer welding of aluminum alloys, laser-welded aluminum alloys have large reflectivity and are prone to problems such as pores, cracks, and composition changes. By laser-arc hybrid welding, due to the action of the arc, the laser beam can directly illuminate the surface of the liquid pool, increasing the absorption rate and increasing the penetration depth. Using AC TIG or DC reverse connection, the oxide film can be cleaned in front of the laser welding, while the molten pool formed by the arc moves in front of the laser beam, increasing the wettability between the molten pool and the solid metal to prevent undercut.

Used in lap joints, lap welds are widely used in automotive frame and floor structures. Many of the current automotive shell welds are galvanized steel lap welds and aluminum plate welds. Laser-arc hybrid welding can reduce the deformation of welded parts, eliminate defects such as undercuts and undercuts, and greatly improve the welding speed. For example, the lap joint of a low carbon steel plate welded by a 10 kW CO2 laser and a MIG arc composite heat source can achieve a lap weld with a gap of 0.5 to 1.5 mm, and the penetration depth can reach 40% of the floor thickness. Another example: 2.7kW YAG laser-MIG arc composite high-speed welding aluminum alloy lap joint, welding speed up to 8m / min.

In high-speed welding of sheet metal, the main problems of laser high-speed welding of sheet metal are poor continuity of weld formation and prone to bump on the surface of weld bead. Using plasma arc assisted YAG or CO2 laser for thin plate (0.14mm) composite welding, the welding speed is twice as fast as that of single laser welding. Even if the welding speed reaches 100m/min, the arc is very stable, and a wider weld path and smooth weld surface can be obtained.

Laser Welding Technology in Medical Devices

With the advent of lasers, people gradually realized that they have strong advantages such as high brightness, monochromaticity and directionality, and they have played an important role in scientific research, military, communications and other fields. Welding technology combines with laser to form a new waterproof laser pointer welding technology, which can effectively break through the limitations of traditional welding technology, and is therefore actively used in automotive manufacturing, aerospace and other fields.

Secondly, laser welding technology has also been widely used in medical and health applications. Due to the demanding requirements of the high cleanliness of its manufacturing process, laser welding technology meets its needs. Compared with other commonly used welding techniques, the laser welding technology produces almost no welding slag and debris, and it is not necessary to add any adhesive during the welding process, so that the entire welding work can be completed in the clean room. The addition of laser welding technology has greatly promoted the development of medical devices, such as the housing of active implantable medical devices, radiopaque markers for cardiac stents, earwax protectors, balloon catheters, etc. .

Implantable medical electronic devices, such as cardiac pacemakers, implantable electrocardiographs, and neurostimulators (spinal cord stimulators, deep brain stimulators, and implantable cochlear implants), are used to manage and treat the body’s physiology Conditions such as heart rate, chronic pain, Parkinson’s disease or severe deafness. In the past decade, patients have rapidly increased the use of implantable medical electronic devices at double-digit rates in order to improve the quality of life. These implantable electronic devices typically consist of microelectronic circuits and batteries that provide energy. In order to protect microelectronic circuits and batteries, they need to be sealed in a metal case. If the seal is lost, the body fluid can directly penetrate into the metal package, causing short circuit failure of the microelectronic circuit and endangering the patient’s life.

Laser welding technology is the most common connection and sealing technology for implantable medical devices. The metal casing of implantable medical devices generally uses titanium and titanium alloys, but titanium has a strong ability to absorb hydrogen, oxygen and nitrogen at high temperatures, so the military laser pointer welding process needs to be carried out in an inert gas-tight environment. In laser welding, the control of laser energy plays an important role in the quality of welding. The laser illuminates the metal surface, which initially reflects 60% to 80% of the laser energy. As the temperature increases, the metal absorbs the laser energy gradually. When it reaches the boiling point, it can absorb nearly 90% of the energy.

The cardiac stent, also known as the coronary stent, is a commonly used medical device in cardiac interventional surgery and has the function of dredging arterial blood vessels. The main material is stainless steel, nickel titanium alloy or cobalt chromium alloy. During the process of transmitting the heart stent to the destination, the radiopaque lines at both ends of the stent can clearly see its trace and open state. The radiopaque markers can be made of precious metals such as gold, enamel and platinum iridium. Riveting, this molding process uses a green laser pointer with a minimum spot diameter of 40 μm (0.04 mm) to weld a disc-shaped marker into a special eyelet.

The gastroscope biopsy forceps used in medical treatment need to penetrate deep into the patient’s body. Therefore, the quality of the biopsy forceps is very demanding. Each component of the composition needs to meet certain tensile strength and good appearance, especially the surface is not allowed. Glitch and other situations. In the previous production process, the front end of the gastroscope biopsy forceps is combined with riveting, resistance welding, etc., and the riveting method will leave burrs and other defects on the surface of the puncture gun, and resistance welding will also produce parts. The large deformation affects the practical application of the puncture gun, and the laser welding technology has the characteristics of non-contact processing, narrow heat influence range, high efficiency, high processing precision, etc., which can realize the flawless, no groove and no crease of the medical field. No burr and no cracking requirements.

Balloon catheter laser welding is the use of laser as the source of energy for infrared welding, which can be directly applied to the surface of the plastic that absorbs the 488nm laser pointer using a laser beam to melt the plastic for welding. The advanced laser welding technology can realize the seamless connection between the balloon tip and the tube body, so that the balloon catheter can be unimpeded when propelled in the curved and narrow diseased blood vessels, the damage to the blood vessel is minimized, and the operation process is safer.

The introduction of laser welding technology is beneficial to further reduce the outer diameter of the balloon dilatation catheter tip. A schematic diagram of the laser welded balloon catheter is shown in Fig. 8. Unlike metal welding, plastic laser welding requires less laser power. The greater the welding laser power, the larger and deeper the heat-acting zone on the plastic part will cause the material to overheat, deform, or even damage, so the laser power should be reasonably selected according to the depth of melting required. The use of plastic laser welding technology in medical devices is far more than the above applications. Plastic laser welding technology is being adopted by more and more medical device manufacturers, and its application prospects will be very bright.

In addition to the application of laser welding technology to the production of medical equipment, there are many other innovative usb laser pointer processing technologies that have great potential in the manufacture of medical equipment, such as laser surface modification, laser cutting, laser drilling and laser micromachining. Research and use of advanced laser processing technology will design more high-quality, high-demand medical equipment.

Industry Development of Laser Cutting Machine

Laser cutting machine industry has developed quite rapidly in recent years. From the initial YAG equipment and CO2 equipment to the current fiber, from low-power fiber to the current 10,000-watt fiber, which shows that our blue laser pointer technology continues to improve, and now the price of laser cutting equipment compared with previous years To be much cheaper, this is a very delightful thing for friends who want to buy equipment, no matter what the industry can afford the laser, afford to use the laser.

For the majority of customers, the purchase of equipment will shop around, so the competition among peers is bound to be ultimately! Nothing more than the concern of people who buy equipment, in addition to configuration, is the price and after-sales service, which is also the competition of major manufacturers. Price competition, the most common peer competition. When you consult the same piece of power equipment, there may be tens of thousands or even hundreds of thousands of price difference between the price. When it comes to configuration and technology, many people might say that the lasers are all for others, and for those of you who are just assembling them together, you do not need any technology at all. Yes, in appearance, this is indeed the case. So many people think that the green laser pointer cutting machine industry threshold low, high profits, just a few people can pull a few. However, how much is done and how much is sold.

red laser pointer

Grasp the rules of laser cutting machine processing factors on the processing of surface quality, you can find ways to improve the surface quality of the process measures to improve the quality of the processing surface. When the laser is cutting the sheet at high temperature, the traces of the molten material do not appear in the notch below the vertical laser beam, and instead, it is ejected at the rear of the laser beam. As a result, the curved lines are formed at the cutting edge and the lines closely follow the moving laser beam. In order to correct this problem, the feed rate is reduced at the end of the cutting process and the formation of lines can be substantially eliminated.

The cutting width generally does not affect the quality of the cut. The cutting width has an important influence only when a particularly precise profile is formed inside the part because the cutting width determines the minimum internal dimensions of the profile. As the thickness of the plate increases, the cutting width also varies with Increase. So you want to ensure that the same high precision, regardless of the width of the incision, the workpiece in the high power laser cutting machine processing area should be constant; when the material thickness of more than 18mm, the cutting edge of the verticality is very important; away from the focus, the laser The beam becomes divergent, depending on the position of the focus, the cut becomes wider toward the top or bottom. Cutting edge deviation from the vertical line a few millimeters, the more vertical edge, the higher the cutting quality.

The heat-affected zone refers to the laser cut where the area along the incision is heated. At the same time, the structure of the material itself changes. For example, some materials can harden. Heat affected zone refers to the regional structure of the internal structure changes due to high temperature; and depression and corrosion of the cutting edge of the surface has an adverse effect on the appearance of laser cutting machine. They appear in the general should avoid the cutting error; Finally, if the cutting makes the part heated rapidly, it will be deformed. This is especially important in fine workmanship, where the contours and tabs are usually only a few tenths of a millimeter wide. Controlling laser power and using short 500mw laser pointer pulses can reduce the risk of heat build-up and avoid distortion.

As said above, there are many manufacturers, the equipment sold out is very cheap, of course, with spare parts and machine tools are poor. Such manufacturers generally do not have a long-term strategic plan of sustainable development, there is no core technology. What they do is some low-end things, simple assembly is also OK, if they let them study some high-tech stuff, there is no professional talent, to give him the same configuration of components, they also create good equipment. In addition to a laser device, the machine tool is also important, the same laser, different manufacturers to make the device, and some can use for years without any major problems, but some day-to-day problems.

Laser Cooling Technology

The chemical lattice of graphene is induced to change by short laser pulses. The duration of a single laser pulse lasts only a few seconds and polar molecules in graphene produce a constant oscillation like water waves. The researchers found that during the oscillation, external molecules or desired compounds can be added to the graphene by cutting the graphene lattice. The spot of the green laser pointer light can be concentrated in a square with a side length of 1 μm or in a smaller area so that the entire addition process can be controlled with high precision.

When light is input to the node, the output of the laser working at the node threshold is modulated, and the output of the laser is fed back to the node, creating a feedback circuit with non-linear features. With regard to the extent to which this nonlinear behavior mimics neural behavior, researchers have demonstrated that its output is mathematically equivalent to a „continuous-time recurrent neural network.“ Researchers used a network of 49 photon nodes to simulate the neural network and used it to solve the mathematical problems of differential equations. They found that this silicon photon neuromorphic chip can compare the arithmetic speed up 1960 times.

green laser pointer

Future advantages: the glass fiber manufacturing cost is low, the technology is mature and its optical fiber can be made of small and intensive advantages; glass fiber on the incident pump light does not require as strict crystal phase matching, which is due to The non-uniform broadening caused by the Stark splitting of the glass substrate results in a wide band of absorption; the glass material has a very low volumetric area ratio, fast heat dissipation and low loss, so the upconversion efficiency is high and the 500mw laser pointer threshold is low; Because rare earth ions are very rich in energy level and the types of rare earth ions as much.

Check the conductivity of circulating water. The purity of the cooling water laser cooling technology introduction is the key to ensure the laser output efficiency and the life of the laser condenser chamber. The conductivity of the recycled water should be checked weekly to ensure its conductivity. The internal circulation must be changed once a month Deionized water. At any time, observe the color change of the ion exchange column in the cooling system. If it is found that the color of the resin in the column becomes dark brown or even black, replace the resin immediately. Check and adjust the 200mw laser pointer resonator. Equipment operators can often use black like paper to check the laser output flare, once spot uneven or energy reduction and other phenomena, the laser cavity should be promptly adjusted to ensure the quality of the laser beam output.

With the continuous expansion of the automotive industry, many new technologies related to automobile manufacturing have entered the field of vision. Some new terms such as the application of laser tailor welded brackets to the bodywork, aluminum bodywork and continuous welding of bodywork have gradually become familiar to everyone. Tailor-made welding plate is the earliest by the domestic auto industry to introduce new technology, which does not reduce the body under the premise of a substantial reduction in body weight and reduce fuel consumption. However, the stamping process of 50mw laser pointer blanking the process of deep drawing of the cracking process has plagued the OEMs.

Analysis on the way of Adjusting Resistance

Potentiometer is used to adjust resistance: potentiometer is a component that can adjust and change the resistance value arbitrarily, but using potentiometer to adjust resistance is inefficient, the accuracy of resistance control is not easy to control, and the labor cost is large.

Laser trimming resistance substrate by cutting short pulse 10mw laser pointer scanning, the resistor paste layer by laser heating gasification, the formation of a certain depth of the notch, thus changing the conductive cross-sectional area of the resistor body and the conductive length reached to below the target resistance to allow the body repair resistance deviation range, suitable for rapid mass production resistance.

Sandblasting and resistance control: the resistance substrate is polished by spraying sand flow, so that the resistance slurry layer is worn, thus changing the conductive section area and the conductive length of the resistor body, and achieving the required resistance. Sand spray resistance is a conventional resistance adjustment scheme. The equipment price is low, but the precision of resistance adjustment is not easy to control, the speed is slow, and it is not easy to automate and batch production.

red laser pointer

The team uses a beam of laser to capture and move particles, and then controls the laser to create images. They take advantage of a near invisible light field to capture and move small particles and pass them through a space. When particles move, they are irradiated by red, green and blue 500mw laser pointer, and map the surface of the object to make it imaging. When the velocity of the particle moves fast enough, the three-dimensional stereoscopic image will be produced and the color gamut is large and the fineness is high. The speed is a little faster, and the objects in the image look like moving. This image can coexist with the entities in the same physical space and can be seen from any angle, which is not realized by the holographic technology at present.

The research team has developed so far the most delicate mirror — only one atom thick molybdenum selenide (MoSe2) thin section, the miracle of engineering will limit the physical world and a step forward. The researchers said that this thin mirror can be developed for the special sensor is very small, and the use of 50mw laser pointer information transmission computer chip.

Scientists have explained that if electrons collide with a proton or light particle in the atom, electrons will probably move from the low level orbitals to the high level orbitals, so that an electron hole pair will form in the electric field. When exposed to light at certain wavelengths, the electrons around MoSe2 are likely to jump. The electrons are negatively charged, while the protons in the nuclei are positively charged. Therefore, these electron hole pairs will draw positive charges from the proton, making the behavior of holes behave like particles. The electronically negative electrons in the vicinity attract these „false“ particles and, in some cases, pair up to form a quantum mechanical object called excitons. These excitons themselves release light, interact with the incident light and send them back in the way they are incident. In this way, these MoSe2 slices can work like a mirror.

According to reports, the ultra-short ultra-short laser in the laboratory to create an unprecedented super-electromagnetic field, ultra-high energy density and ultra-fast time scale comprehensive extreme physical conditions in the desktop accelerator, ultrafast chemistry, attosecond science, materials Science, 200mw laser pointer fusion, nuclear physics and nuclear medicine, laboratory astrophysics and other fields have great application value.

Fiber Laser Marking Machine Detailed

Many people are not very understanding of the laser marking machine, it will not be clearly divided into what industries will be used, it is not clear their own industry will not be used, in fact, laser marking machine is widely used in terms of concept, useful Marking can be used to laser marking machine.

The so-called fiber green laser light marking machine is the type of marking machine using a fiber laser, fiber laser with small size (no water cooling device, the use of air-cooled), good beam quality (basic mode), maintenance-free features, mainly by the laser , Vibration lens, marking card composed of three parts, the use of fiber laser laser marking machine, the beam quality, the output center of 1064nm, the whole life of about 100,000 hours, relative to other types of laser marking life more Long, electro-optical conversion efficiency of 28% or more, relative to other types of laser marking machine 2% -10% conversion efficiency advantages, performance and other aspects of energy saving and environmental protection.

laser pointer

Equipment Features: Can be a variety of metal, non-metallic materials for processing. Especially for high hardness, high melting point, brittle material marking even more advantages. Belongs to non-contact processing, does not damage the product, no tool wear, marking quality is good. 10mw laser pointer beam fine, processing material consumption is small, processing heat-affected zone small. High processing efficiency, using computer control, easy to automate.

Widely used in IC chips, computer accessories, industrial bearings, watches and clocks, electronic and communications products, aerospace components, all kinds of auto parts, household appliances, hardware tools, molds, wire and cable, food packaging, jewelry, tobacco and military affairs and many other Field graphics and text markup, as well as high volume production line assignments.

Future advantages: the glass fiber manufacturing cost is low, the technology is mature and its optical fiber can be made of small and intensive advantages; glass fiber on the incident pump light does not require as strict crystal phase matching, which is due to The non-uniform broadening caused by the Stark splitting of the glass substrate results in a wide band of absorption; the glass material has a very low volumetric area ratio, fast heat dissipation and low loss, so the upconversion efficiency is high and the 500mw laser pointer threshold is low; Because rare earth ions are very rich in energy level and the types of rare earth ions as much.

Tunability: Due to the wide range of rare earth ions and glass fiber fluorescence spectrum wider. Because there is no optical lens in the cavity of the fiber laser, it has advantages of adjustment-free, maintenance-free and high stability, which is unmatched by traditional lasers. Optical fiber export, making the laser can easily handle a variety of multi-dimensional space for any processing applications, the mechanical system design has become very simple. Competent for poor working conditions, dust, shock, shock, humidity, temperature has a high tolerance. No thermoelectric cooling and water cooling, just a simple air-cooled. High electro-optical efficiency: The comprehensive electro-optical efficiency is as high as 20% or more, which greatly saves power consumption during operation and saves operating costs. High-power, commercial fiber lasers are six kilowatts.

Non-contact welding, and the workpiece to be welded without physical contact, thermoplastic does not occur chemical reaction, can be operated in an industrial environment, suitable for health and safety needs of the medical and food industries. Medical industry is mainly used for injection systems, medical electronic equipment, a variety of artificial implants and stoma products. powerful laser beam shape and size can be controlled, so as to control the size of heat-affected zone and joint area, high flexibility and good flexibility. Not limited to the size and shape of the parts to be welded, to achieve two-dimensional or even three-dimensional welding, to provide a basis for diversified custom parts production.

Key Points of Laser Cutting Machine with Alloy Fiber

Fiber laser: it is the most important part of the optical fiber laser cutting machine, and it is the „power source“ for the optical fiber laser cutting machine to realize the cutting operation. Compared with other types of laser pointer, fiber laser has the advantages of higher efficiency, longer service life, less maintenance, lower cost and so on.

Cutting head: the cutting head of a laser cutting machine is a laser output device, which is composed of a nozzle, a focusing lens and a focusing and tracking system. The cutting head of laser cutting machine will walk according to the set cutting path, but the height of laser cutting head needs adjusting control under different material, thickness and cutting mode.

red laser pointer

Servo motor: a servomotor is an engine that controls the operation of mechanical components in a servo system. It is a kind of auxiliary motor indirect transmission. The servo motor can make the control speed, the position precision is very accurate, the voltage signal can be converted to torque and speed to drive the control object. The high quality servo motor can effectively ensure the cutting precision, positioning speed and repeated positioning precision of the laser cutting machine.

Cold water machine: the cold water machine is the cooling device of the 500mw laser pointer cutting machine. It can quickly and efficiently cool the laser, spindle and other devices. The current chiller has the advanced functions of the input and output control equipment switch, the cooling water flow, the high and low temperature alarm, and the performance is more stable.

Gas supply system: the gas supply system of the optical fiber laser cutting machine mainly includes the gas source, the filter device and the pipeline. The gas source has two kinds of bottled gas and compressed air.

Host: the body of the laser cutting machine, the beam, the worktable, the Z axis system and so on are all known as the mainframe. When laser cutting machine cuts, it first puts the workpiece on the lathe bed, then uses the servo motor to drive the crossbeam to control the movement of the Z axis. Users can adjust the parameters according to their own needs.

Control system: mainly control machine tools to realize the movement of X, Y and Z axis, and also control the output power of the laser.

Steady voltage power supply: connected to the 10mw laser pointer, the CNC machine tool and the power supply system. It is mainly to prevent the interference from external power grid.

Fabric Laser Cutting Machine in the Textile Industry

As time goes on, people become more and more dissatisfied with the blandness of clothing, there is no characteristic, began to search for a kind of clothing produced by the creative machine, such a machine produced clothing must have a certain personality , which requires the help of laser equipment!

The continuous development of the times, blue laser technology is increasingly being used in all walks of life, clothing as a traditional labor-intensive industries are also accelerating the pace of technological innovation to adapt to the increasingly fierce international competition. Today, garment CAD technology is gradually being adopted by more and more enterprises, and achieved good results. Fabric laser cutting machine has also begun to gradually optimistic about the strength of the major companies. Its traditional equipment has incomparable advantages, specifically in the following two aspects.

First, cloth laser cutting machine can completely avoid the mistakes caused by manual cutting, improve accuracy. The traditional method to cut the film, if the cloth is thin, the amount of film can be implemented less, but if you encounter large quantities of clothing pieces of the task, this method is very easy to cause the upper and lower parts of the size of the error. Workers are most likely to encounter rework and patching problems during the first phase of cropping.

red laser pointer

As the error caused by the cutting will lead directly to the artificial wear and tear of the test piece and the repair piece, the delay of the time period, and even affect the process of sewing, quarantine, packing and so on, which are delayed, these invisible losses can not be calculated by concrete figures , The direct consequence of this is to extend the order manufacturing cycle. Fabric laser cutting machine can also avoid the manual operation of the cut pieces may cause damage, pollution and irregular edges of the pieces of small problems. For the management of the company, cloth high powered laser cutting machine equipment can use data to help control the work of the various sections of the enterprise.

Second, the fabric laser cutting machine is not only improved on the processing technology of cut pieces, but also can manage the initial discharge. Intuitive figures tell users that computerized discharges are bound to save more material than the discharge of the most experienced crews. These are laser cutting directly to help businesses maximize the use of the fabric, to avoid unnecessary waste.

In addition, because the use of automatic laser cutting system to manage the plate, the data stored by the computer to automatically arrange. We no longer have to spend time looking through the original nesting orders, just click on the computer keys to find the raw data you need, you can call or make changes directly.

Cloth green laser cutting machine applications so that companies no longer have a calculator to calculate how much fabric waste, or because of the delay in the project, how much more cost increase, the surface can be happily accounting save a few percent of the fabric, save the percentage A few of the manual consumption. At the same time, due to the completion of the project ahead of schedule, the production line can easily face another batch of orders, thereby enhancing the competitive edge.

Therefore, in the next few years, cloth laser cutting machine will be the same as garment CAD technology, become a new round of garment manufacturing technology innovation tool.