Laser Welding Machine

Legent Laser Technology Co., Ltd.: Your Trustworthy Laser Welding Machine Manufacturer！

Our company was founded in 2010. It is a high-tech enterprise integrating R&D, production and sales of laser cleaning equipment, laser marking equipment, laser welding equipment, machine vision and related application control systems. Our team of optical, mechanical and software design experts develops complete laser solutions and various high-performance laser machines for marking, cleaning and welding.

Rich Product Range
We can produce laser cleaning machines, fiber laser marking machines, UV laser marking machines, CO2 laser marking machines, flying laser marking machines, dynamic focusing laser marking machines, automatic laser marking machines, large-format laser marking machines, laser welding machines, etc.

Leading Service
We have many years of industry experience and a complete production management, quality supervision, sales service operation system. Whether you want to buy a laser cleaning machine or a flying laser marking machine, just send your requirements by email and we can customize the product for you.

Wide Sales Area
Our laser equipment has been sold to more than 50 countries and regions around the world, including the United States, Germany, Italy, India, South Africa, Japan, Canada, etc.

Wide Scope of Cooperation
We have reached cooperation with more than 100 users in various industrial manufacturing fields such as aerospace, rail transportation, automobile manufacturing, precision machinery, electronics and electrical appliances, jewelry, craft gifts, etc., and finally completed more than 150 industry-specific laser application solutions.

Galvo Laser Welding Machine

Fiber laser galvanometer welding machine adopts fiber laser and high-speed scanning galvanometer, with good light source, especially suitable for needs.

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1000w 1500w 2000w Laser Welding Machine

LG-FH series hand-held laser welding machine, easy to learn, fast welding speed, beautiful welding seam, fast welding speed of ordinary metal, less consumables than traditional welding, better effect

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1500w Handheld Laser Welder

The handheld laser welder is a new, more flexible welding process for welding small, medium and large workpieces. Our handheld laser welding machine is mainly used for inner and outer right angle,

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Handheld Laser Welding System

The new handheld laser welding system offers manufacturers greater flexibility, precision and ease of use than traditional welding products to weld a wide range of thick and thin metals with minimal

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Hand Held Laser Welders

The hand-held fiber laser welding machine is a new generation of laser welding equipment. It belongs to non-contact welding. It does not require pressure during the operation. , which melts the

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Industrial Processing Galvo Laser Welding Machine

The galvanometer laser welding machine controls the direction of the laser with a high-speed moving scanning lens, and cooperates with software with powerful graphics processing functions to form

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What is Laser Welding Machine

A laser welding machine is a device that uses high-energy pulse laser to irradiate the workpiece to achieve the purpose of welding. It can accurately weld the workpiece by adjusting the energy of the pulse laser using different laser frequencies and pulse widths.

Features of Laser Welding Machine

High Flexibility of Laser Welding
Laser welding machines can realize welding at any angle and can weld hard-to-reach parts. They can also weld various complex workpieces and large workpieces with irregular shapes.The machines offer great flexibility to achieve welding at any angle.

Laser Welding Has the Advantages of High Speed, Large Depth and Small Deformation
Due to the high power density, small holes are formed in metal materials during laser welding, and the laser energy is transmitted to the deep part of the workpiece through these small holes, with less transverse diffusion. Therefore, the material fusion depth is significant in the process of laser beam scanning, and the process offers high speed and large welding area per unit time.

Understand the Parameter Settings of the Laser Welding Machine

Laser Power Density
Power density is one of the most important parameters in laser processing. With higher power density, it can heat the surface layer to the boiling point in microseconds, thus generating a large amount of vaporization. Therefore, high power density is conducive to material removal processing, such as stamping, cutting and engraving. For lower power densities, it takes several milliseconds for the surface temperature to reach the boiling point. Before the surface layer vaporizes, the bottom layer reaches the melting point, which is easy to form good fusion welding. Therefore, in conductive laser welding, the power density is in the range of 104~106W/cm2. Beam spot size is one of the most important variables in laser welding, because it determines the power density.

Material Absorption Value
The absorption of laser by materials depends on some important properties of materials, such as absorptivity, reflectivity, thermal conductivity, melting temperature, evaporation temperature, etc., of which the most important is absorptivity.

Pulse Shape and Width
Pulse waveform is an important problem in welding, especially for thin plate welding. When the high intensity beam hits the material surface, part of the energy on the metal surface will be lost by reflection, and the reflectivity will change with the surface temperature. During the pulse action, the reflectivity of the metal varies greatly.

Effect of Defocus
Due to the high power density of the spot center at the laser focus, it is easy to evaporate into holes. In each plane far from the laser focus, the power density distribution is relatively uniform. There are two defocusing methods: positive defocusing and negative defocusing. If the focal plane is above the workpiece, it is positive defocusing, otherwise it is negative defocusing. According to the geometrical optics theory, when the distance between the positive and negative defocusing planes and the welding plane is equal, the power density on the corresponding plane is approximately the same, but the actual shape of the weld pool obtained is different. When the defocusing is negative, greater penetration depth can be obtained, which is related to the formation process of the molten pool.

Parts of Laser Welding Machine

Laser Welding Host
The laser welding host mainly produces a laser beam for welding, and it comprises the power supply, laser generator, optical path part, control system, and other components. In some cases, low-power lasers are typically integrated into the automatic worktable of the laser welding system.

Cooling System
The cooling system provides the cooling function for the laser generator, which is generally equipped with a 1-5 HP water-circulating chiller.

Tooling Fixture
In the process of laser welding, a laser welding fixture is generally employed to secure the welded workpiece and enable it to be repeatedly loaded, unloaded, and positioned. This makes automatic laser welding more manageable. Thus, the fixture is one of the essential pieces of equipment in laser welding production. Especially during batch production, whether the fixture is adequately designed will directly impact the production efficiency and yield.

Observation System
Generally, the laser welding machine should be equipped with an observation system that can conduct real-time microscopic observation on the workpiece. This observation system is used to facilitate accurate positioning when compiling the welding program and inspecting the welding effect during the welding process.

Types of Laser Welding Machine

Handheld Laser Welding Machine
Handheld laser welding machines are known for their user-friendliness and versatility. These portable devices are perfect for businesses looking for versatile solutions that can handle various welding tasks with precision and speed. Moreover, their ergonomic design allows for comfortable operation, making them a top choice for businesses requiring on-the-go welding capabilities.

Spot Laser Welding Machine
Spot laser welding machine specializes in creating localized welds on small, intricate parts. They are often used in the jewelry industry and for manufacturing electronic components and medical devices. Hence, spot laser welding machines deliver remarkable precision and negligible thermal distortion, rendering them perfect for intricate and sensitive tasks.

How Does a Laser Welding Machine Work?

01/

Preparation
Clean the materials to be welded, ensuring they are free from dust, grease, or any other contaminants. Make sure everything is properly aligned.

02/

Focusing the Laser
This is where the typically generated laser beam, either by fiber laser source or solid-state source, is focused on the material being welded.

03/

Melting the Material
The laser beam heats the materials at the point of contact, causing them to melt and form a small pool called the weld puddle.

04/

Seaming
This is when the high-intensity laser melts the material and leaves behind a seam as it passes by. You can also call this the joint.

05/

Cooling System and Solidification
The molten materials cool down and solidify, forming a strong and durable bond between the welded parts.

06/

Inspecting the Weld
After the weld has cooled and solidified, it is inspected for quality and consistency to ensure a successful outcome.

How to Choose Laser Welding Machine

Material Type
Consider the materials you’ll be welding, as different machines may have varying capabilities to handle specific materials, such as metals or thermoplastics.

Welding Requirements
Assess the complexity, size, and precision required for your welding tasks. This will help you choose a machine that meets your specific application needs.

Budget
Determine your budget and weigh it against the machine’s features, quality, and long-term value. While affordability is important, investing in a reliable and efficient machine can save you money in the long run.

Machine Type
Based on your requirements, select the most suitable type of laser welding machine, such as handheld, fiber, spot, or seam welding machine.

Power Output
Consider the machine’s power output; higher power can result in faster welding speeds and increased penetration depth.

Ease of Use
Look for machines with user-friendly interfaces and controls, as this can enhance productivity and reduce the operator learning curve. Also, looking for easy-to-use laser welding equipment would be best.

Automation Capabilities
If your business requires high-volume production, consider an automatic laser welding machine to improve efficiency and consistency and reduce labor costs.

Service and Support
Opt for a machine from a reputable laser welding machine manufacturer that offers reliable after-sales support, maintenance, and training services. Laser welders often need this assistance in the initial phases.

Integration
Ensure the laser welding machine can easily integrate into your existing production processes and workspace.

Safety Features
Check for built-in safety features, such as protective enclosures and warning systems, to ensure the well-being of your operators and maintain a safe working environment.

Common Misconceptions About Laser Welding Machines

Limited Material Compatibility

Many believe that a laser welding machine can only handle specific materials. In reality, they can weld a wide range of metals and thermoplastics, making them versatile and suitable for various industries.

High Costs

Some assume that laser welding machine is too expensive for small businesses. However, affordable options and long-term cost savings from increased efficiency and reduced labor make them viable investments for companies of all sizes.

Complexity

The misconception that laser welding machine is too complex to operate often deters potential users. Modern machines feature user-friendly interfaces, making them easy for operators with varying skill levels to learn and use.

Safety Concerns

People often associate laser technology with safety risks. A properly designed laser welding machine comes with built-in safety features and guidelines to ensure operator safety and maintain a secure working environment.

Low Weld Strength

There is a misconception that laser welds are weaker than traditional welds. In fact, laser welding machines can produce strong, high-quality welds with minimal distortion.

Limited Weld Types

Some believe that a laser welding machine can only produce specific weld types. However, depending on the application, these machines are adaptable and capable of creating a range of welds, such as butt, lap, or fillet welds.

Applications of Laser Welding Machine

Automotive
This is probably one of those industries that makes the most of the use of laser welding machines. Automakers use it for assembling vehicle components, such as body panels, chassis, and engine parts. As a result, it ensures high-quality welds with minimal distortion, resulting in lighter and more durable vehicles.

Shipbuilding
In shipbuilding, laser welding machines are used to join large metal sheets and structural components. The laser welder allows for faster production times and higher-quality welds. Hence, this improves the overall strength and durability of ships and marine vessels.

Construction
The construction industry uses laser welding machines for fabricating metal structures, such as steel beams, columns, and trusses. The technology ensures strong and reliable welds that can withstand heavy loads and harsh environmental conditions.

Aerospace
This industry requires high precision welding because there is no room for error. As a result, laser welding machines come in really handy for manufacturers. They use it for critical components like aircraft structures, turbine engines, and fuel systems.

Appliances
The appliance industry utilizes laser welding machines for joining various components of household appliances, such as refrigerators, washing machines, and ovens. This ensures a sleek and seamless appearance and enhanced durability and functionality.

Electronics
In the electronics industry, laser welding machines help connect small, delicate components like circuit boards and sensors. The process provides highly accurate and clean welds essential for properly functioning electronic devices.

Frequently Asked Questions

Q: How does a laser welding machine generate the required energy for welding?

A: Laser welding machines generate energy through a process called photonic emission. Depending on the type of laser, this can involve the stimulated emission of electromagnetic radiation from a medium such as a crystal (in solid-state lasers like Nd:YAG) or a gas mixture (in gas lasers like CO2 lasers). Electrical energy is supplied to the laser medium, exciting its particles to emit photons in a coherent and amplified manner. This results in a concentrated beam of light that can be directed onto the workpiece for welding.

Q: What are the common types of lasers used in laser welding machines?

A: The most common types of lasers used in laser welding machines include solid-state lasers like Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG), fiber lasers, and gas lasers such as Carbon Dioxide (CO2) lasers. Each type has unique characteristics, such as wavelength, power output, efficiency, and suitability for different applications. For instance, Nd:YAG lasers are versatile and can be used for a variety of materials and thicknesses, while CO2 lasers offer high power and are particularly effective for thicker materials.

Q: How does the optics system in a laser welding machine focus the laser beam?

A: The optics system in a laser welding machine plays a crucial role in directing and focusing the laser beam onto the workpiece. This system typically consists of lenses and mirrors that manipulate the path of the beam. Lenses are used to converge the beam to a smaller focal spot, which increases the intensity of the beam and allows for precise welding. Mirrors are used to guide the beam to the desired location on the workpiece. The alignment and adjustment of these optical components are critical to achieving optimal welding results.

Q: What materials can be welded using a laser welding machine?

A: Laser welding machines are capable of welding a wide range of materials, including various metals such as steel, aluminum, copper, brass, and titanium. In addition, some laser welding machines are also designed to weld non-metallic materials like certain plastics and ceramics. The choice of material will depend on the type of laser used and the specific requirements of the application.

Q: What are the benefits of using a laser welding machine compared to traditional welding methods?

A: Laser welding machines offer several advantages over traditional welding methods, including higher precision, faster welding speeds, reduced heat input, and minimal distortion of the workpiece. Additionally, laser welding can be performed in a vacuum or under an inert gas atmosphere, which helps to prevent oxidation and improve weld quality. These benefits make laser welding particularly suitable for applications requiring high-quality seams in sensitive or critical components.

Q: How is the power output of a laser welding machine controlled during welding?

A: The power output of a laser welding machine is typically controlled through a computerized control system that monitors and adjusts the electrical current supplied to the laser medium. This control system allows the operator to fine-tune the power output based on the specific requirements of the welding task. Some advanced systems also incorporate sensors and feedback loops to automatically adjust the power output in real-time to ensure consistent weld quality.

Q: What is the role of gas shielding in laser welding?

A: Gas shielding plays a crucial role in laser welding by protecting the weld area from atmospheric contaminants that could degrade the joint quality. The shielding gas is usually an inert or reactive gas, such as argon, helium, or nitrogen, which is directed over the weld area to create a barrier against oxygen, moisture, and other potential contaminants. This helps to reduce oxidation, porosity, and other defects that could compromise the strength and integrity of the weld.

Q: How is the positioning of the workpiece achieved in laser welding?

A: The positioning of the workpiece in laser welding can be achieved through manual manipulation or using automated systems such as robots or programmable worktables. Manual manipulation involves the operator moving the workpiece into position relative to the laser beam using jigs and fixtures. Automated systems use servo motors and control algorithms to precisely position the workpiece based on pre-programmed parameters or real-time sensor feedback. These systems can significantly increase productivity and consistency in high-volume production environments.

Q: What factors determine the suitability of a laser welding machine for a particular application?

A: Several factors determine the suitability of a laser welding machine for a particular application, including the type and thickness of the materials to be welded, the required weld quality,the desired production rate, and the available budget. Other factors may include the working environment (e.g., temperature, humidity, cleanliness), the complexity of the welding task, and any special requirements related to the final product (e.g., aerospace-grade welds or biocompatibility).

Q: How do laser welding machines compare to other automated welding methods in terms of flexibility and adaptability?

A: Laser welding machines offer a high level of flexibility and adaptability compared to other automated welding methods. They can be easily reconfigured for different tasks and are capable of welding a wide range of materials and thicknesses. Additionally, the precision and speed of laser welding make it an ideal solution for complex welding tasks that require high-quality seams. However, the initial cost and maintenance of a laser welding system may be higher than other methods, such as MIG or TIG welding.

Q: What safety precautions should be taken when operating a laser welding machine?

A: Operating a laser welding machine requires strict adherence to safety protocols to protect both the operator and the surrounding environment. These precautions include wearing appropriate protective clothing and eyewear, ensuring proper ventilation and gas shielding, and keeping flammable materials away from the work area. Additionally, operators should receive proper training and understand the hazards associated with laser radiation and high-temperature welding processes.

Q: Can laser welding machines be integrated into existing production lines?

A: Yes, laser welding machines can often be integrated into existing production lines with minimal disruption. Many manufacturers offer flexible systems that can be easily incorporated into existing workflows and interfaced with other automation equipment. Retrofitting an existing production line with a laser welding machine can help to improve productivity, enhance product quality, and reduce manufacturing costs.

Q: What are the limitations of laser welding machines?

A: While laser welding machines offer many advantages, they also have some limitations. For instance, they may not be suitable for very thick materials or highly reflective surfaces, which can absorb or reflect the laser beam and cause poor weld quality. Additionally, the initial cost of purchasing and maintaining a laser welding system may be较高 compared to other welding methods. Finally, the availability of skilled operators and technicians trained in laser welding processes may be limited in some regions.

Q: How do laser welding machines handle variations in material properties?

A: Laser welding machines can handle variations in material properties to some extent by adjusting the power output, beam diameter, and travel speed of the laser. Advanced control systems may also incorporate sensors and feedback loops to monitor and compensate for changes in material thickness, hardness, and other properties in real-time. However, significant variations in material properties may still require manual intervention or re-calibration of the system to achieve optimal welding results.

Q: What are the future trends in laser welding technology?

A: The future trends in laser welding technology include increased automation and integration with other manufacturing processes, higher power and efficiency of laser sources, improved optics and beam delivery systems, and enhanced software capabilities for process control and optimization. Additionally, there is growing interest in developing multi-material and additive manufacturing applications using laser welding techniques to enable more complex and innovative product designs.

Q: How is quality control maintained in laser welding processes?

A: Quality control in laser welding processes is maintained through a combination of process monitoring, inspection, and testing. Real-time process monitoring tools such as cameras, sensors, and spectrometers can be used to detect and correct deviations from the desired welding parameters. Post-weld inspection may involve visual examination, non-destructive testing methods (such as ultrasonic or radiographic testing), or destructive testing (such as tensile or shear testing) to assess the quality of the weld seam.

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