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...

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...

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...

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,...