Laser welding is a game changer in the world of metal fabrication. It has revolutionized how Shengen approaches manufacturing processes.

Laser welding uses a laser beam that is highly concentrated to join thermoplastic or metal materials. This tool is an essential part of our production line. It allows us to produce high-quality, durable welds. This technique is unique for its versatility, speed, and ability to create solid and clean joints with minimal heating input.

Laser welding is a modern manufacturing staple because of its benefits. Understanding this process is essential for those in manufacturing or procurement. It can help you make informed decisions about suppliers and production methods.

History and Definition

Laser welding is a new technique that has revolutionized how we create and assemble parts. As a B2B sheet metal fabrication parts manufacturer at Shengen, we have harnessed this technology to propel our operations to new levels of precision and efficiency.

What is Laser Welding

Laser welding involves using a laser beam that is concentrated to join materials. This concentrated laser beam is a focused source of heat, which allows for deep, narrow welds and high welding speeds. This versatile process has been proven beneficial in many applications because of its precision and ability to create strong welds even in difficult-to-reach areas. Our advanced laser weld equipment is ready to take on a wide range of projects and meet the diverse needs of our clients.

History of laser weld

Laser weld began in the 1960s with the first experiments. The technology has advanced tremendously over the years. In the 1980s and 90s, solid-state lasers replaced gas lasers. They were more efficient and controlled. In the 21st century, we have seen the introduction of fiber and disc lasers. These new types of lasers provide higher power outputs and greater efficiency.

We have updated our processes and equipment to stay at the forefront of this industry. We have witnessed first-hand the impact of these technological advances on our manufacturing capabilities.

The advantages of laser weld over traditional methods

Laser welding offers many advantages over other welding methods. This technique is unparalleled in precision, enabling the creation of intricate and detailed parts. The laser’s precise directionality helps minimize waste and reduce costs.

Laser welding is also more efficient. Laser welding is a faster method of joining metals, which allows for shorter production time and meeting tight deadlines. This efficiency does not compromise the quality of the joints.

Laser Weld Fundamentals

Laser welding is a crucial component of modern manufacturing. It offers a high level of precision and efficiency. We have integrated the technology into our Shengen operations and witnessed its transformational impact on sheet metal fabrication.

How does Laser Welding work?

Laser welding employs an intensely focused laser beam to heat and melt the material at the welding point. Laser beams are focused at the smallest size possible to maximize energy density, creating intense heat. This concentrated heat allows deep penetration of the material to produce a weld that is precise and strong.

There are many types of lasers used in welding.

The different types of lasers have unique capabilities, and the choice of which one to use depends on your needs.

Solid-State Lasers

Solid-state lasers such as NdYAG lasers use a solid gain media. These lasers function at a wavelength that metals readily absorb. This makes them very effective for welding in our industry. They are capable of delivering high power outputs, and you can use them in either continuous wave or pulsed operation.

Fiber Lasers

The latest technology in laser weld is fiber lasers. Fiber lasers utilize optical fibers as gain media, and these fibers are doped with rare earth elements. Examples of these elements include erbium and ytterbium. Fiber lasers have a reputation for being reliable, efficient and producing a high-quality beam. Shengen relies on its high output power and long service life to meet its production needs while maintaining the highest quality standards.

Gas Lasers

Gas lasers, such as CO2 Lasers, use a mixture of gases to produce the laser beam. Its lasers have a more extended spectrum than solid-state ones, which may be advantageous depending on the application. When welding thicker materials, gas lasers are the preferred choice. People favor them for their impressive deep penetration abilities.

The role of laser beam characteristics in welding

The laser beam’s characteristics are crucial in determining weld quality and efficiency.

Beam Quality

“beam quality” refers to a laser’s ability to focus on a small area. A better beam quality indicates more precise focusing capabilities. A high beam quality produces a small spot of focus and a high energy density. This is crucial for accurate and robust welding. Shengen is committed to maintaining the highest possible beam quality so our customers receive the best products.


The beam’s wavelength determines the amount of energy absorbed by a material. Finding the correct wavelength for welding is essential. Different materials react differently to different wavelengths. Shengen’s expertise allows us to select the best laser wavelength and type for the material. This optimizes our welding process.

Power Density

The power density is the amount of laser energy delivered per area unit. It is an essential factor when determining weld strength and depth. A high power density will allow for a deep penetration of the material to create a durable and robust weld. We can adjust the power density to meet the needs of every project at Shengen.

The role of laser beam characteristics in welding

Laser Weld Setup and Equipment

The equipment and the setup are crucial in sheet metal fabrication. They play a pivotal role in achieving efficiency and precision. We take pride in the state-of-the-art laser weld equipment we use at Shengen. This ensures that each component performs optimally.

The Key Components in a Laser Welder Machine

Laser welding machines are sophisticated pieces of equipment that consist of many integral components. Each component plays a vital role in the process of welding.

Laser Source

The laser source, which generates the laser beam for the welding process, is at the core of the machine. The laser type, whether it’s a solid-state laser, a fiber laser, or a gas laser, determines the characteristics of the laser beam. This includes its wavelength and power. We have invested in different laser sources at Shengen to ensure we have the best tool for each job.

Beam Delivery System

The beam delivery system guides the laser beam to the welding material. The method comprises mirrors, lenses, and other optical elements that are precisely aligned to deliver the laser beam accurately and efficiently. Shengen’s highly skilled technicians ensure our beam delivery system is always in perfect condition. This guarantees the precision our clients require.


Materials awaiting welding sit at workstations, which are also handled throughout the process. A workstation comprises a table, fixtures, and possibly robotic arms for automated welding. Workstations must be stable and robust, guaranteeing the material stays in the correct position during welding. We’ve invested in workstations of high quality to provide a solid foundation for laser welding.

How to Set Up a Laser Welding Machine for Maximum Performance

Precision and attention to detail are required when setting up a laser welder. It is crucial to calibrate the laser source accurately, align the beam delivery precisely, and ensure the workstation securely holds the material. Shengen’s team boasts extensive training in setting up laser welding machines, guaranteeing flawless execution of each job.

Safety measures and precautions

Laser welding is not an exception. Safety is paramount for any manufacturing environment. Laser weld is dangerous because of the intense laser beam. We take security very seriously at Shengen. To protect both our employees and our equipment, we have implemented strict safety protocols.

We equip our operators with protective clothing and eyewear to ensure their safety. We also provide safety barriers to contain the laser beams during operation. Our equipment is also regularly maintained and inspected to minimize the risk of an accident.

Laser Welding Processes & Techniques

Understanding the different processes and techniques is essential to achieve optimal results in the vast field of laser weld. We at Shengen specialize in a variety of laser weld techniques, each with its unique applications and benefits.

Fusion Laser Weld

Basics and Mechanism

The principle behind Fusion Laser welding is to melt the materials together without using filler material. The laser beam is a concentrated source of heat that softens the edges and allows the materials to flow together. The material solidifies as it cools and forms a durable, strong weld. This process is efficient and precise. It’s a mainstay in Shengen.

Applications and Use Cases

Fusion laser welding is ideal for applications that require precision and strength. It is perfect for thin materials and produces narrow, deep welds, making it suitable for intricate, complex parts. We use fusion lasers in many industries, including aerospace, automotive, and electronics. This ensures that the details we produce are of the highest possible quality.

Conduction Laser Weld

Basics and Mechanism

Conduction lasers operate at lower intensities than fusion welds. This process involves melting the surface of the metal, forming a pool of weld that solidifies after cooling. Controlling the heat input is the key to conduction welding. This will prevent excessive penetration of the material and maintain its integrity.

Applications and Use Cases

Conduction laser welding can create smooth seams and weld thin materials. Industries that prioritize the appearance of their products, such as jewelry and medicine, commonly use this method. We use conduction lasers for delicate projects at Shengen. This ensures that the end product meets our high standards and those of our customers.

Hybrid Laser weld

Combining Laser Weld with Other Techniques

Hybrid laser welds combine laser welding and traditional techniques such as MIG or tig welding. This hybrid process combines the advantages of laser welding and conventional welding techniques, such as MIG or TIG welding.

Applications and Benefits

It is more versatile than laser-only welding and can weld thicker materials or bridge more significant gaps. On the other hand, shipbuilding and construction industries, which demand strength and durability, opt for hybrid laser welding. We use hybrid laser weld at Shengen for projects requiring both precision and robustness. This allows us to provide our clients with innovative and reliable solutions.

Hybrid Laser welding

Materials that are suitable for laser weld

We at Shengen understand that material selection is critical to the success of any laser weld project. We know that different materials react differently to laser weld. It’s our responsibility to know what materials are most suitable for specific applications.

Metals and Alloys

Metals and alloys are popular choices for laser weld. This is due to their excellent heat conductivity and ability to create durable, strong welds.

Stainless Steel

It is famous for laser weld due to its strength and resistance to corrosion. Laser weld produces strong and precise welds. In automotive, aerospace, and medical applications, we use stainless steel to deliver products that meet and exceed the highest quality standards.


Due to its high thermal conductivity and reflectivity, aluminum presents a challenge for laser weld. With the correct laser settings and type, you can achieve successful welding. Welding aluminum is a skill that requires expertise and the right equipment. Shengen has this knowledge and can produce solid and reliable results in industries like automotive and electronics.


Titanium’s high strength-to-weight ratio, combined with its corrosion resistance, makes it a popular material for aerospace and medical applications. Laser weld is a great way to create lightweight, vital parts to meet our client’s needs.


Laser technology can weld specific non-metal materials and alloys.


Laser plastic welding is a rapidly growing field that offers speed and precision. To achieve successful plastic welding, you must choose the correct laser and the settings that are appropriate for the material. We have extensive experience in welding plastics and can guarantee solid and seamless joints.


When welding glass, the process becomes more intricate than metals or various plastics. It is essential to control the intensity and focus of the laser, as this can lead to solid and transparent welds. Shengen’s laser weld expertise extends to glass. We provide innovative solutions for many applications.

Factors affecting the suitability of materials

Not all materials are equal when it comes to laser weld. Material reflectivity, thermal conductivity, and absorption of the laser wavelength are all critical factors in determining a material’s suitability for laser welding. We consider these factors, along with the job requirements, when choosing the suitable material at Shengen.

Quality Control and Testing for Laser Welding

Shengen places a high priority on the quality of its laser welds. We use strict quality control and testing protocols to ensure that each weld is up to our high standards and meets the requirements of our customers.

Laser Welding Process Monitoring and Control

We continuously monitor and adjust various parameters to maintain the integrity of laser welding processes. We keep a vigilant eye on the laser’s power, the beam’s focus, and the welding speed, making on-the-spot adjustments as needed. Our technicians are skilled in spotting deviations from the desired settings and swiftly taking corrective action.

We use the latest sensors and monitoring equipment to ensure laser welding is going according to plan. These tools empower us to identify irregularities, whether from variations in the laser beam or issues with the material undergoing welding. This will enable us to act quickly and maintain quality.

Common Defects – How to avoid them

The laser welding process is precise but has challenges. Porosity, cracks, and incomplete penetration are some of the defects that may occur. We know the causes and how to prevent these defects at Shengen.

The cause of porosity is either contaminants in the materials or turbulence within the pool. We minimize this risk by thoroughly cleaning the materials of any contaminants before welding. Additionally, we optimize the welding parameters to ensure a stable and reliable connection.

Cracks may occur when welding materials that have different thermal expansion coefficients or due to rapid cooling. We carefully control the welding rate and cooling rate and select materials compatible with one another to prevent cracks.

Insufficient laser power can lead to incomplete penetration. This problem can be avoided by calibrating the laser accurately and monitoring the welding process to ensure the laser is reaching the required depth.

Laser Weld Inspection and Testing Methods

After welding, we employ various testing and inspection methods to evaluate the welds. Visual inspection, X-ray or ultrasonic tests, and destructive tests are some ways we use them.

Visual inspections allow us to inspect the surface for defects and irregularities. This ensures that the weld is meeting the aesthetic standards. To examine the internal structure and uncover any concealed weaknesses, we may use X-rays or ultrasonics. In cases where the application is critical, we might opt for destructive testing. This process requires sacrificing a weld sample to assess its strength and integrity.

Laser Welding Inspection and Testing Methods

Laser Weld Applications

Laser welding is a revolutionary technology that offers precision, efficiency, and strength. We at Shengen harness the full power of laser weld and apply it to various industries to meet the needs of our customers.

Aerospace and Aviation

The aerospace and aviation industry is a significant consumer of lightweight yet durable components. Laser welding is the best way to meet these demands. We create pieces that are lightweight and have minimal distortion, which is crucial for spacecraft and aircraft.

We fabricate parts for airframes and jet engines resistant to extreme pressures and temperatures. Laser weld allows us to work with complex geometries and produce reliable components while improving the efficiency and performance of aircraft.

Automotive Industry

The automotive industry is always looking for innovations to improve vehicle performance and ensure safety. Laser welding is a vital component of this evolution. Shengen provides automotive manufacturers high-strength welds for chassis components, transmission parts, and other critical applications.

Our laser welding techniques ensure lightweight and durable components that contribute to fuel efficiency improvements without compromising safety. The ability to weld dissimilar materials opens up new opportunities in vehicle design and materials sciences.

Medical Device Manufacturing

In the medical device industry, precision and reliability are not negotiable. Laser weld is a valuable tool in the medical device industry because it produces strong and precise welds, even on small components. Our surgical instruments, implants, and other medical devices are manufactured with the highest precision to ensure they work flawlessly.

Biocompatibility is another vital consideration. Our laser welding expertise ensures the components that we produce are safe and reliable for both healthcare professionals and their patients.

Electronics and Precision Engineering

Electronics is a rapidly evolving industry with a constant demand for innovation. The precision of laser welding makes it the ideal method for creating strong yet tiny welds in electronic components. We ensure that circuit boards, sensors, and connectors can withstand daily use.

Our laser welding services are the best in precision engineering. Whether for medical devices, electronic components, aerospace components, or other precision engineering applications, we guarantee accuracy and reliability. Our welds match the durability of the materials they connect, ensuring longevity and outstanding performance.

Future trends and developments in Laser Welding

Thanks to ongoing technological progress, the discovery of new materials, and a growing focus on sustainability, laser welding continues to evolve. We at Shengen keep an eye on these trends to ensure we are always at the forefront of innovation within the sheet metal fabrication sector.

Technological Advancements

Laser welding will continue to progress in the future. We expect further improvements to laser power, beam quality, and control systems. This will lead to more precise and efficient processes. The advancements in monitoring and control technologies will enable real-time adjustments to the welding process. This will ensure consistently high-quality results.

Automation and artificial intelligence integration are also in the future. These advancements will increase the precision and efficiency of laser welding by reducing the margin of error and increasing productivity. We are investing in this technology at Shengen to ensure that we stay competitive and offer the best solutions possible to our customers.

New Materials and Applications

Material requirements change as industries develop. We anticipate an increase in demand for the ability of laser welding to join new materials or material combinations. Laser welding will be able to create stronger, lighter, and more durable components due to research into new alloys and composite materials.

Shengen’s team is constantly exploring new materials and techniques to ensure we can meet future demands. We are ready to push the limits of laser welding for applications in aerospace, automotive, or medical fields.

Considerations for Environmental Sustainability

Laser welding is not an exception. Laser welding is more eco-friendly than traditional welding methods because it uses less energy and emits fewer pollutants.

We are committed at Shengen to minimizing our environmental impact. We optimize our laser-welding processes continuously to improve energy efficiency and reduce wastage.


This comprehensive laser welding exploration explores the many facets of this cutting-edge technology and its importance in manufacturing. We at Shengen are proud of our laser welding expertise, which offers precision, efficiency, and quality to meet the varied needs of our customers.

Do you need a reliable sheet metal parts manufacturer? Shengen is the place to go. We specialize in sheet metal laser cutting, bending, surface finish, and CNC Machining. Reach out to Shengen Today and seek help from professionals!


What materials cannot be welded using lasers?

Laser welding is versatile but has its limitations. Laser welding can be difficult for materials with high reflectivity. This includes certain aluminum alloys and copper alloys. These materials reflect laser beams and make it difficult to weld. Materials that absorb laser wavelengths poorly, as well as certain plastics and glass types, can be problematic. 

What is the speed of laser welding compared to other weld techniques?

Laser welding is faster than traditional welding methods, particularly when compared. The ability of the laser to quickly heat, melt, and solidify material results in shorter welding times. Laser welding is fast and precise, but it keeps quality high. This means that our clients in Shengen will benefit from reduced production time and improved efficiency.

What are the safety risks associated with laser welding?

As with any manufacturing process, there are safety risks associated with laser welding. Laser beams produce intense heat and light, posing dangers without proper safety precautions. Burns, eye injuries, and exposure to toxic fumes are all possible risks. We prioritize safety at Shengen. We implement strict safety protocols and provide our team with protective equipment.

Can laser welding be used for large-scale manufacturing?

Laser welding is an excellent option for large-scale manufacturing. The speed, consistency, and efficiency of laser welding make it an ideal choice for large-scale production. We have equipped Shengen’s facilities with the latest laser welding equipment, which allows us to tackle large-scale projects easily. Our laser welding capability is up to the challenge, whether handling thousands of identical parts or large, complex assemblies.

What is the level of precision that can be achieved with laser welding?

Precision is the hallmark of laser welding. Lasers, when focused down to fractions of a millimeter, enable us to perform exact welding. This level of accuracy is crucial for industries such as aerospace, medical device manufacture, and electronics, where even a slight inconsistency could lead to component failure. We use laser welding to ensure that our components meet the highest standards. This helps us deliver reliable and high-performance components for our customers.


More Resources:

Laser weld monitoring – Source: Laserax

Environmental Sustainability in Manufacturing – Source: EPA

Laser Welding Case Studies – Source: DiVA

Hey, I'm Kevin Lee

Kevin Lee

For the past 10 years, I’ve been immersed in various forms of sheet metal fabrication, sharing cool insights here from my experiences across diverse workshops.

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Kevin Lee

Kevin Lee

I have over ten years of professional experience in sheet metal fabrication, specializing in laser cutting, bending, welding, and surface treatment techniques. As the Technical Director at Shengen, I am committed to solving complex manufacturing challenges and driving innovation and quality in each project.

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