2000w Fiber Laser Welding Machine
  • Key considerations for laser welding of dissimilar materials
    Jan 06, 2025 Key considerations for laser welding of dissimilar materials
    Several key factors need to be considered when welding dissimilar materials: A. Material matching and compatibility When selecting dissimilar materials for welding, compatibility must be considered, especially in terms of chemical composition, melting temperature and thermal expansion coefficient. These factors directly affect the stability and quality of the weld. 1. Chemical composition compatibility: Differences in the chemical composition of different materials may lead to the formation of unfavorable compounds or oxides during welding, thereby affecting the quality of the weld. Appropriate filler materials need to be selected to avoid these adverse reactions. 2. Melting temperature matching: Differences in the melting temperatures of dissimilar materials will lead to uneven heat distribution during welding, affecting the welding effect. Controlling the temperature of the welding heat source to ensure that both materials can melt smoothly is the key. 3. Thermal expansion coefficient difference: Different thermal expansion coefficients between materials will generate stress during welding and increase the risk of cracks. This problem can be alleviated by optimizing the welding design and appropriate heat treatment. 4. Alloy filler material: For materials that are difficult to be compatible, the use of alloy filler materials can help improve the welding effect and enhance the strength and durability of the weld. 5. Welding process selection: Selecting a suitable welding process, such as laser welding, TIG welding, etc., can effectively reduce the incompatibility between materials and ensure the stability of the welding process. By reasonably selecting alloy filler materials, welding methods, and controlling heat input, the stability and quality of dissimilar material welding can be effectively improved. B. Optimal laser parameters In laser welding, selecting the correct laser parameters is the key to ensuring welding quality, especially when welding dissimilar materials. The following is a brief introduction to laser parameters: 1. Laser power: Laser power directly affects the depth and width of the weld. When the power is too low, it may not be able to achieve sufficient melting depth, resulting in incomplete welding; too high power may cause overheating, burn-through, or material deformation. Dissimilar materials have different thermal conductivity and melting temperatures, and the laser power needs to be precisely adjusted to ensure uniform temperature in the weld area and avoid defects. 2. Pulse frequency: The pulse frequency affects the heating and cooling speed of laser welding. Higher pulse frequencies are suitable for thinner materials, while lower frequencies are suitable for thicker materials. When welding dissimilar materials, the pulse frequency needs to balance the difference in thermal conductivity of the two materials to avoid cracks or weakened joints due to too fast or too slow cooling. 3. Scanning speed: The scanning speed aff...
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  • How can laser cleaning machines benefit the food industry?
    Jan 02, 2025 How can laser cleaning machines benefit the food industry?
    Laser cleaning technology ensures that most of the dirt evaporates and the remaining residues fall loose. Not only does the laser cleaning machine clean more thoroughly than traditional methods, but the heat generated by the laser beam also has antibacterial properties, which can effectively remove bacteria and microorganisms from the surface of the substrate. In addition, laser cleaning machines reduce harm to the environment and human health, making them an indispensable innovative technology in the development of the food industry. Today, we will explore some basic knowledge about laser cleaning machines. In addition, we will also discuss the application of laser cleaning machines in the food industry. We hope that this article will help you choose a laser cleaning machine that suits your needs. What is laser cleaning technology? Laser cleaning technology uses high-intensity laser beams to remove oil, rust, oxides and other residues from the surface of metals and other materials. Thermal decomposition: When the laser beam is irradiated to the surface of the target material, the temperature rises rapidly due to the energy of the beam, accelerating the heating and evaporation of the contaminants. This process is similar to breaking down dirt with high temperatures and is particularly suitable for removing stubborn grease and coatings. Photolysis: High-energy laser photons interact with contaminant molecules and break molecular bonds. This photolysis effectively removes complex chemical contaminants such as paint and oxide layers. What are the benefits of laser deep cleaning? 1. Extend equipment life One of the main advantages of laser cleaning machines is the contactless cleaning process. Contactless means that when dealing with grease and other contaminants, no mechanical tools are required to remove them, and no chemical cleaners or abrasive grinding is required, because the cleaning medium is a high-energy laser beam. The laser beam only acts on surface contaminants without applying friction or pressure to the substrate. Therefore, using a laser cleaning machine will not cause wear and tear on your production equipment. 2. Achieve precise cleaning The laser beam in the laser cleaning machine can be focused into an extremely small spot with a diameter as small as a few microns. This concentrated energy enables the laser cleaning machine to work in very small areas, such as grooves and narrow spaces that are difficult to clean. In addition, the laser cleaning machine can adjust the pulse width and frequency of the laser according to your cleaning needs. For example, short pulse widths are suitable for removing thin layers of contaminants, while high frequencies can be used for large-scale cleaning. Finally, the laser power can be precisely adjusted according to the complexity of the cleaning task. Lower power is suitable for removing light dirt, while higher power can be used to remove stubborn oxide layers or rust. 3. More hygienic and safer I...
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  • Differences between continuous and pulsed laser cleaning machines
    Dec 20, 2024 Differences between continuous and pulsed laser cleaning machines
    Continuous and pulsed laser cleaning machines are two types of lasers for laser cleaning machines. This article will focus on the working principle, laser characteristics, specific applications, etc. of pulsed laser cleaning machines and continuous laser cleaning machines. At the same time, the differences between the two will be analyzed in depth. At the end of the article, we will give professional laser cleaning machine purchase guidance. 1. What is a pulsed laser cleaning machine? 1.1 Working principle of pulsed laser cleaning machine To understand what a pulsed laser cleaning machine is, you must first understand what a pulsed laser is. Pulse laser can be understood as: every short time interval, the laser will be concentrated once, and the light will be continuously emitted repeatedly, so the pulsed light has a prominent time interval characteristic. Pulse lasers can achieve high peak power precision laser cleaning tasks by adjusting the pulse width and pulse frequency. 1.2 Two output beam modes of pulsed laser cleaning machines: single mode and multi-mode Pulse laser cleaning machines are divided into single-mode pulsed laser cleaning machines and multi-mode pulsed laser cleaning machines according to the beam quality, spot size, energy distribution, and output power. Single-mode pulse laser beam quality is higher, M² value can be close to 1, the spot is smaller, the laser output energy is more concentrated, and the energy distribution of single-mode pulse laser is Gaussian distribution, high in the middle and low on both sides. These characteristics make the beam of single-mode pulse laser sharper, like a needle tip, and more effective in removing pollutants such as oil, rust, etc. However, the fiber core used by single-mode laser is thinner, generally about 4-10 microns, so the output power of single-mode pulse laser is lower than that of multi-mode pulse laser. Multi-mode pulse laser has larger spot size, wider beam distribution, and flat-top energy distribution, like a small flat-top house. When performing laser cleaning tasks, it sweeps back and forth like a wide broom. Compared with single-mode pulse laser, multi-mode pulse laser has softer beam. In addition, multi-mode pulse laser has greater output power, so the cleaning efficiency is faster. Multi-mode pulse laser has high output power and large spot size, which is the best choice for cleaning large areas or thick layers. 1.3 Features of pulse laser cleaning machine: High peak power: The pulse laser cleaning machine releases high energy in the form of short pulses, and can release high energy in a very short time, so it has a high peak power. When performing laser cleaning tasks, not only can the higher laser energy be used to remove oxide layers, oil stains, rust, etc., but the thermal impact on the substrate is also minimal and will not cause damage. Adjustable pulse width: Our pulse laser cleaning machines all use MOPA (Master Oscillator Power Amplifier) lasers, so the pulse wi...
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  • Laser VS sandblasting VS high-pressure water gun rust removal, which one is more powerful?
    Dec 10, 2024 Laser VS sandblasting VS high-pressure water gun rust removal, which one is more powerful?
    Laser rust removal The principle of laser rust removal is laser cleaning. The process of pulsed Nd:YAG laser cleaning depends on the characteristics of the light pulse generated by the laser, based on the photophysical reaction caused by the interaction between the high-intensity beam, short-pulse laser and the contamination layer. Its physical principle can be summarized as follows: 1. The beam emitted by the laser is absorbed by the contamination layer on the surface to be treated. 2. The absorption of large energy forms a rapidly expanding plasma (highly ionized unstable gas), generating shock waves. 3. The shock wave breaks the contaminants into fragments and removes them. 4. The width of the light pulse must be short enough to avoid heat accumulation that damages the treated surface. 5. Experiments show that when there is an oxide on the metal surface, plasma is generated on the metal surface. Plasma is only generated when the energy density is higher than a threshold, which depends on the contamination layer or oxide layer to be removed. This threshold effect is very important for effective cleaning while ensuring the safety of the substrate material. There is also a second threshold for the appearance of plasma. If the energy density exceeds this threshold, the cleaning effect will be affected. In order to effectively clean the substrate material while ensuring its safety, the laser parameters must be adjusted according to the situation so that the energy density of the light pulse is strictly between the two thresholds. Each laser pulse removes a certain thickness of the contamination layer. If the contamination layer is thick, multiple pulses are required for cleaning. The number of pulses required to clean the surface depends on the degree of surface contamination. An important result of the two thresholds is the self-control of cleaning. Light pulses with energy density higher than the first threshold will continue to remove contaminants until they reach the substrate material. However, because their energy density is lower than the damage threshold of the substrate material, the substrate will not be damaged. Sandblasting Rust Removal The principles of sandblasting and high-pressure water gun rust removal are actually similar. The main purpose is to spray corundum to impact the surface to achieve the purpose of rust removal. Sandblasting process: It uses compressed gas to spray material (commonly used spray materials include copper ore sand, quartz sand, corundum, iron sand, Hainan sand, etc.) onto the surface of the workpiece in a high-speed air pressure manner. Under the impact and cutting of the spray material on the surface of the workpiece, the surface is given a certain degree of cleanliness (such as rust removal). Rust removal with high-pressure water gun High-pressure water gun sprays water and sand together. By combining the lubrication of water and the grinding force of sand, it can effectively remove rust and dirt, while re...
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  • Problems and solutions for laser welding copper metal
    Dec 04, 2024 Problems and solutions for laser welding copper metal
    Laser welding machine is a high-precision, high-speed welding equipment, which has been widely used in many fields. Copper, as an excellent conductive and thermal conductive material, is often used in electronics, electricity, communications, automobiles and other fields. However, there are some difficulties in laser welding copper materials, such as the influence of physical properties, chemical reactions and process requirements. Let's take a look at the problems and solutions for laser welding copper metal. Problems: 1. Physical properties Copper is a material with high thermal conductivity and high reflectivity, which makes it easy for laser welding machines to have problems such as rapid heat conduction and difficulty in forming a molten pool when welding copper materials. In addition, copper has a large thermal expansion coefficient, which is prone to deformation and cracking during welding. 2. Chemical reaction Copper easily reacts with oxygen in the air at high temperatures to generate copper oxide, which reduces the quality and stability of welding. In addition, copper has a high melting point and requires a higher energy density during welding, which also increases the difficulty of welding. 3. Process requirements The welding process of the laser welding machine needs to be adjusted according to factors such as material type, thickness, welding speed, and power. For copper materials, due to their physical and chemical properties, higher laser power and faster welding speed are required, and measures need to be taken to prevent problems such as oxidation and deformation. Solution: 1. Material selection In order to improve the effect of laser welding machines when welding copper materials, you can choose to add alloy elements or use methods such as plating to change the physical and chemical properties of copper materials. For example, adding alloy elements can lower the melting point of copper and improve its oxidation resistance; using plating can enhance the thermal conductivity and stability of copper materials. 2. Process optimization According to the physical and chemical properties of copper materials, the following measures can be taken to optimize the welding process: (1) Use inert gas protection measures to prevent copper materials from contacting oxygen and improve welding quality and stability; (2) Use anti-deformation technology to offset deformation during welding by presetting the anti-deformation amount; (3) Control welding speed and power to maintain the stability of the molten pool and welding quality. 3. Equipment upgrade For problems with laser welding of copper metal, more advanced laser welding equipment, such as semiconductor lasers, composite lasers, etc., can be used to improve welding efficiency and stability. In addition, auxiliary equipment such as automation systems and visual tracking can be equipped to improve welding accuracy and quality. Improve product yield and reduce scrap rate. The above are the probl...
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  • Understand the forms and applications of laser welding processes
    Nov 19, 2024 Understand the forms and applications of laser welding processes
    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...
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  • Nondestructive testing technology of detection methods after laser cleaning
    Oct 31, 2024 Nondestructive testing technology of detection methods after laser cleaning
    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...
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  • Innovative Application of Laser Cleaning in Emerging Industries
    Oct 24, 2024 Innovative Application of Laser Cleaning in Emerging Industries
    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...
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