As a modern high-end welding technology, laser welding has been widely used in many industries due to its advantages of high power density, precise control and non-contact operation. Compared with traditional welding methods, laser welding not only has the characteristics of deep penetration, fast welding speed, small heat-affected zone and less deformation, but also performs particularly well in handling high-precision and high-complexity welding tasks. It is widely used in high-end manufacturing fields such as automobiles, ships, aerospace, electronics, and energy, and has become one of the indispensable technologies in modern manufacturing. With the rapid development of the global manufacturing industry, the application scenarios of welding technology are becoming increasingly rich, and the welding requirements are becoming higher and higher. Laser welding technology has gradually replaced traditional welding methods in many fields due to its high precision, high efficiency, low pollution and applicability to a variety of materials. Below, we will take a deep look at several common laser welding process forms and their applications. 1. Laser spot welding Laser spot welding is a welding method that uses a high-energy laser beam to quickly heat the contact points of two workpieces to form a weld. Laser spot welding is mainly divided into two forms: pulsed laser spot welding and continuous laser spot welding. (1) Pulse laser spot welding: In pulse laser spot welding, the peak energy of the laser beam is high, but the action time is extremely short, which is suitable for welding light metals such as magnesium alloys and aluminum alloys. Its advantage is that it can quickly heat and form a local molten pool, prevent excessive heat input, reduce deformation, and is suitable for precision welding. (2) Continuous laser spot welding: Unlike pulse laser spot welding, continuous laser spot welding has a higher average power and a longer laser action time, and is usually used for welding steel and other metals. Because it can provide continuous heat input, it is suitable for welding tasks that require greater joint strength. In the automotive industry, laser spot welding is widely used in car body welding, especially in the connection between aluminum alloys and steel that requires high-quality welding. Due to its non-contact characteristics, laser spot welding can avoid the electrode wear problem caused by traditional resistance spot welding, and the welding trajectory can be flexibly designed according to needs to meet the high-quality welding requirements of automobile body materials under different overlap gaps. 2. Laser vertical welding Laser vertical welding is a process for placing two parallel workpieces vertically and welding them along the contact line using a laser beam. During the welding process, the laser beam forms a vertical seam by irradiating the workpiece perpendicularly. Vertical laser welding is particularly suitable for butt or overl...

Laser cleaning is a technology that uses high-energy laser beams to irradiate the surface of the workpiece, causing the coating, dirt or rust on the surface to be instantly removed or peeled off, thereby achieving cleanliness. It has the advantages of environmental protection, wide contact-free application range, and high cleaning accuracy. It has good cleaning effects in paint removal, rust removal and cultural relics restoration. It is widely used in many fields such as aerospace, shipbuilding, rail transportation, automobile manufacturing, precision instruments, and cultural relics. The laser power density of laser cleaning has a cleaning threshold and a damage threshold. Only when it reaches above the cleaning threshold will the cleaning effect be produced and it cannot exceed the damage threshold. Otherwise, it will cause damage to the substrate, resulting in the destruction of the surface integrity of the substrate, the decline of surface performance, and thus the failure to meet the use requirements. Therefore, the substrate after laser cleaning should be subjected to nondestructive testing. Nondestructive testing methods refer to methods for evaluating the internal functional realization and structural performance indicators of the structure without destroying the external structural integrity of the detection object. The use of nondestructive testing methods can locate and analyze the substrate morphology, defect location and type, location information, etc., and predict the service life based on the defect situation, material and other conditions, which can further reduce costs under the condition of production safety. This article mainly introduces several commonly used laser cleaning nondestructive testing methods: penetration testing, magnetic particle testing, ultrasonic testing, radiographic testing and eddy current testing. 1. Penetration testing Penetration testing is a method of checking surface defects of materials using capillary phenomena. The application process is shown in the figure below. Apply penetrant to the surface of the structure to be tested, and penetrate into the tiny defects of the surface opening under the action of capillary tubes. Use a cleaning agent to remove the penetrant, wait for a period of time for the test piece to reach a dry state, apply a developer, and absorb the residual penetrant. Observe the defective part and you can clearly see the traces of the penetrant. According to the traces, the location and shape of the defect can be clearly determined. 2. Magnetic particle testing Magnetic particle testing is a method for detecting surface and near-surface defects of ferromagnetic materials. When the workpiece is magnetized, if there are defects on the surface or near the surface of the workpiece, leakage magnetic flux is generated due to the increase in magnetic resistance at the defect, forming a local magnetic field, and the magnetic powder will show the shape and location of the defect here. Magne...

As an efficient and environmentally friendly surface treatment technology, laser cleaning technology is showing its unique advantages and application potential in more and more emerging industries. In recent years, it has been innovatively applied in emerging industries such as new energy vehicles, 3D printing, aerospace, and cultural relics protection. New Energy Vehicle Industry In the field of new energy vehicles, laser cleaning technology is becoming one of the key technologies for battery manufacturing and electric vehicle maintenance. The core component of new energy vehicles, power batteries, requires strict control of the presence of impurities and pollutants during its manufacturing process to ensure the performance and safety of the battery. Laser cleaning technology can efficiently remove oil stains, metal debris and other pollutants on the surface of battery poles, shells and other components, improve the cleanliness and consistency of the battery, and thus improve the energy density and cycle life of the battery. In addition, during the repair and maintenance of electric vehicles, laser cleaning technology can also be used to remove dirt and carbon deposits on the surface of components such as motors and controllers, and improve heat dissipation performance and operating efficiency. 3D Printing Industry As a revolutionary breakthrough in the manufacturing industry, 3D printing technology is being applied in more and more fields. However, the removal of powder residues and support structures generated during 3D printing has always been one of the bottlenecks restricting its development. Laser cleaning technology can accurately remove powder residues and support structures on the surface of 3D printed parts without causing damage to the printed parts themselves, thus improving the accuracy and surface quality of the printed parts. In addition, laser cleaning can also be used for the pretreatment of 3D printed materials, removing oxides and contaminants on the surface of materials, and improving the bonding strength and performance of printed parts. Aerospace industry The aerospace field has extremely high requirements for the high performance and cleanliness of materials. Laser cleaning technology can efficiently remove oil, rust, coating and other contaminants on the surfaces and parts of aircraft, rockets and other aerospace vehicles, improve the cleanliness and accuracy of the surface, and ensure the safety and stability of flight. In addition, laser cleaning can also be used for the repair and maintenance of aerospace vehicles, remove surface damage and corrosion, and extend the service life. In the manufacturing process of aerospace vehicles, laser cleaning technology can also be used to remove spatter and burrs generated by welding, cutting and other processes, and improve manufacturing quality and efficiency. Cultural relics protection industry Cultural relics protection is an important task in inheriting historical culture. Tra...

Currently, in the new energy battery industry, laser cleaning technology has seen extensive applications in lithium battery cleaning. It not only improves cleaning efficiency and quality but also reduces production costs and environmental pollution. With ongoing technological advancements and decreasing costs, laser cleaning technology is expected to be more widely applied in lithium batteries and other industrial sectors, contributing to the promotion of green manufacturing and sustainable development. 1.Laser Cleaning Before Electrode Coating The positive and negative electrode sheets of lithium batteries are coated with lithium battery materials on metal foils, typically aluminum or copper. Before applying the electrode materials, the metal foils need to be cleaned to ensure the adhesion of the coating and the battery's performance. Traditional wet ethanol cleaning methods can easily damage other components of the lithium battery, while laser cleaning technology effectively addresses this issue. By using pulsed lasers to directly irradiate and remove contaminants, the surface temperature of the metal foils increases, causing the pollutants to vibrate due to thermal expansion, ultimately overcoming the surface adhesion and detaching from the substrate. This achieves a damage-free cleaning process. 2.Laser Cleaning Before Battery Welding Welding is a critical step in the production of lithium batteries. A clean and uniform surface is essential for achieving durable and successful welding and bonding. Therefore, prior to welding, surface treatment is required to remove contaminants at the weld joints. Laser cleaning technology can efficiently and precisely remove dirt and dust from areas such as the sealing pins, connection plates of the cell segments, as well as the busbars, single cell blue membranes, silicone, and coatings, preparing for the welding process and reducing the occurrence of defective welds. 3.Laser Cleaning During Battery Assembly During the battery assembly process, to prevent safety incidents with lithium batteries, external adhesive treatment is typically required for the cell to provide insulation, prevent short circuits, and protect the circuitry from scratches. Laser cleaning of the insulation boards and end plates can clean the surfaces of the cells, roughen the surfaces, and enhance the adhesion of adhesives or coatings. Laser cleaning generates no harmful pollutants, making it an environmentally friendly cleaning method that meets current societal demands for environmental protection.

With the arrival of high temperature and high humidity weather, lasers have encountered severe challenges in their daily operation. This article will analyze in detail the impact of environmental control on lasers, the principle of condensation, and how to effectively prevent and deal with these challenges. How does condensation occur on lasers? Condensation is the phenomenon that when water vapor in the air encounters a cold surface, the temperature drops below the dew point and the water vapor condenses into liquid water. In lasers, lasers are usually equipped with a cooling system to maintain their internal temperature stability. The cooling system takes away the heat generated by the laser by circulating coolant. However, when the ambient temperature and humidity are too high, the cooling system may cause the surface temperature of the laser to be lower than the dew point temperature of the surrounding air. The surface will condense the moisture in the air and attach it to the laser, and condensation will occur. What are the effects of condensation in a hot and humid environment on lasers? 1. Aging of internal components of the laser High temperature will accelerate the aging process of internal components of the laser, especially electronic components. The performance degradation of aging components may cause the laser to work unstably or even fail. 2. Condensation can cause a short circuit in the laser circuit Once condensation occurs on the surface of the circuit board and electrical module inside the laser, condensed water may cause a short circuit in the circuit board device, damage sensitive electronic components, and even cause the entire laser to fail and be scrapped. 3. Optical performance degradation, power, and spot problems After condensation occurs on the optical device, the water droplets formed on the surface will affect the reflection and refraction of light, causing changes in the output power and spot pattern of the laser. In addition, water droplets may also corrode the optical lens, further reducing the performance of the laser. How to prevent laser condensation? 1. Ambient temperature and humidity control By controlling the temperature and humidity of the environment where the laser is located, condensation can be effectively prevented. This includes using an air conditioning system to lower the ambient temperature and using a dehumidifier to control the ambient humidity. 2. Cooling system setting According to the changes in ambient temperature and humidity, reasonably adjust the set temperature of the laser cooling system to ensure that the temperature of the cooling water is higher than the dew point temperature of the environment to avoid condensation due to excessive temperature difference. 3. Application of temperature and humidity dew point comparison table Using the temperature and humidity dew point comparison table, you can intuitively understand the dew point temperature under different environmental conditions,...

Before discussing the technical details of laser welding of aluminum and aluminum alloys, we need to understand the basic working principle of laser welding machines. Laser welding machines use high-intensity laser beams to locally heat the welding area to a molten state to achieve precise metal connections. Its main components include lasers, optical systems, and welding heads. The laser generates high-energy lasers, the optical system focuses the laser beam to the welding site, and the welding head ensures the accurate positioning of the laser beam. Laser welding machines can provide a concentrated and high-power heat source, reduce the heat-affected zone and deformation, and thus improve welding quality and efficiency. Especially when welding aluminum, the precise control function of these devices can effectively deal with common problems in aluminum welding, such as pores and cracking. Modern laser welding machines are also equipped with intelligent control systems that can adjust process parameters in real time to ensure the stability and consistency of the welding process. Aluminum and aluminum alloys are widely used in construction, transportation, automobiles, electronics, packaging, and aerospace due to their light weight, high strength, and corrosion resistance. With the development of technology, the aluminum alloy welding process has been improved. Laser welding is a welding technology commonly used in the market. It has the advantages of high-power heat source concentration, small heat-affected zone, less deformation, energy saving and consumption reduction. In the daily welding process, due to the special properties of aluminum, it is difficult to control the laser focus and molten pool when laser welding aluminum and aluminum alloys; when the welder sets the process parameters improperly or lacks rich experience, problems such as pores, cracking and deformation, blackening of welds and non-fusion of undercuts may occur, which seriously affect the welding quality and performance. Next, we will introduce the difficulties and solutions encountered in welding aluminum. The main problem encountered when using laser welding aluminum is pores. During the welding process, the laser beam causes the molten pool metal to fluctuate. When the gas trapped in the metal expands and overflows, pores will appear; in addition, the aluminum oxide film will hinder the bonding between metals, absorb moisture and easily produce impurities, which will promote the formation of pores. The generation of pores will lead to weaker weld strength, reduced corrosion resistance, and unsightly welds. In general, the following measures are recommended: Adjust the appropriate laser power to ensure uniform heat input. When welding thin plates, it is recommended to increase the speed to reduce the time for gas to expand in the metal; when welding thick plates, the welding speed can be reduced to ensure performance when the material is preheated. Chemically or mechanica...

Laser cutting machine is a device that uses laser beam as a cutting tool and is widely used in cutting and processing of various materials such as metals and non-metals. 3000W laser cutting machine is a relatively common device on the market, with high cutting accuracy and efficiency. This article will introduce in detail the cutting capacity, application scope, working principle, operating precautions and other aspects of 3000W laser cutting machine. A. Cutting capacity of 3000W laser cutting machine 1. Cutting thickness The cutting thickness of 3000W laser cutting machine is affected by many factors, such as laser power, cutting speed, material type, etc. Generally speaking, the thickness range that 3000W laser cutting machine can cut is 0.5mm-20mm. Specifically: (1) For carbon steel, the thickness range that 3000W laser cutting machine can cut is 0.5mm-20mm. (2) For stainless steel, the thickness range that 3000W laser cutting machine can cut is 0.5mm-10mm. (3) For aluminum alloy, the thickness range that a 3000W laser cutting machine can cut is 0.5mm-8mm. (4) For non-ferrous metals such as copper and brass, the thickness range that a 3000W laser cutting machine can cut is 0.5mm-6mm. It should be noted that these data are for reference only, and the actual cutting effect is also affected by factors such as equipment performance and operating skills. 2. Cutting accuracy The 3000W laser cutting machine has a high cutting accuracy, which can generally reach +-0.05mm. This is mainly due to the high-precision control system and precise optical system of the laser cutting machine. In addition, the laser cutting machine also has the characteristics of non-contact cutting, which does not generate mechanical stress, thereby ensuring the flatness and accuracy of the cutting surface. 3. Cutting speed The cutting speed of a 3000W laser cutting machine is affected by factors such as material type, thickness, and cutting mode. Generally speaking, the cutting speed of a laser cutting machine can reach several meters to tens of meters per minute. Specifically: (1) For carbon steel, the cutting speed of a 3000W laser cutting machine can reach 10-30 meters per minute. (2) For stainless steel, the cutting speed of a 3000W laser cutting machine can reach 5-20 meters per minute. (3) For aluminum alloy, the cutting speed of a 3000W laser cutting machine can reach 10-25 meters per minute. (4) For non-ferrous metals such as copper and brass, the cutting speed of a 3000W laser cutting machine can reach 5-15 meters per minute. B. Scope of application of 3000W laser cutting machine 3000W laser cutting machine is widely used in metal processing, machinery manufacturing, automobile manufacturing, aerospace, electronics, medical equipment, architectural decoration and other fields. Specifically, it can be used for cutting the following materials: 1. Metal materials such as carbon steel and stainless steel. 2. Light metals such as aluminum alloy and magnesium alloy. 3. Non-...

Laser welding concentrates energy in a small range, instantly melts the welding wire and the base material to form a weld. Therefore, the welding depth after welding is large, the weld is narrow, and the speed is fast. It is suitable for self-melting welding, and usually no welding wire is needed. Of course, laser welding machines can also perform wire welding. Generally, welding wire needs to be added when the weld is larger than 1mm. The filling of welding wire makes the laser welding process more complicated. Mastering the wire feeding characteristics of laser wire welding under different welding conditions is a prerequisite for obtaining high-quality welds. Wire feeding speed is an important process parameter for laser wire welding. Reasonable selection of wire feeding speed can make full use of laser energy and improve production efficiency. The wire speed should be determined according to the gap amount of the joint. During laser welding, the welding wire is almost 100% transferred to the welding pool. Therefore, the wire feeding speed can be calculated based on the material balance of the welding process. The excess height of the weld section and the gap of the joint are both filled with welding wire. According to different welding processes, the welding wire can be fed from the front of the laser or from the back, and at a certain angle to the optical axis. In laser wire welding, the welding wire is generally required to be coplanar with the weld on the vertical plane, so that when there is a slight fluctuation in the wire feeding process, the stable transition of the molten droplet can be guaranteed. The straightness of the welding wire is very important for the stability of welding, affecting the absorption of the beam energy by the welding wire and the stability of the welding process. In order to ensure that the welding wire is delivered to the intersection of the optical axis and the base material, a copper tube is generally used to guide the welding wire at the end of the wire feeding hose, as shown in the figure. A gas pipe is installed above the workpiece to blow helium or argon gas on the side to protect the molten pool and suppress plasma. For some metals that are easily oxidized (such as titanium alloys), a special protective cover is also required to protect the molten pool and the high temperature area of the weld. Generally, the wire feeding angle is more suitable between 30° and 75°. The wire feeding position should be aligned with the center line of the weld as much as possible. When the wire feeding position deviates from the center line of the weld by 0.25mm, the melting efficiency of the 2mm welding wire will be reduced by 30%, and the melting efficiency of the 1.0mm and 1.2mm welding wires will be reduced by about 36%. Therefore, in the case of high welding requirements, the best method is to equip an optical weld tracking system for real-time monitoring and control of the welding wire position. If the wire feeding spe...