What is a laser welding machine and how does it work?


Laser welding is a process that uses a laser to weld two pieces of metal together. Laser welding machines focus a high-powered laser beam onto metal, melting it and forming a weld.

Laser welding is a versatile process that can be used on a variety of metals, including aluminum, stainless steel and titanium. It can also be used on dissimilar metals such as aluminum and stainless steel.

Laser welding machines are a relatively new technology that have been commonly used in industries such as automobile manufacturing industry, Chassis and cabinet industry and shipbuilding since the 1990s.

This article will introduce the working principle, advantages and applications of laser welding machines, and also introduce how to choose a suitable welding machine.

automobile manufacturing industry

What is laser welding? 

Laser welding is a type of welding that uses a laser to heat the material being joined. The heat from the laser melts the material, allowing the two pieces to be joined together. Laser welding is a very precise method of welding, and it can be used on a variety of materials.

Laser welding is a relatively new process, and it has a number of advantages over traditional welding methods. Laser welds are very strong and can be made with very little distortion.

Additionally, laser welding can be done very quickly, and it is often used for welding thin materials that are difficult to weld using other methods.

How does a laser welding machine work?

A laser welding machine uses a focused beam of light to create a weld between two pieces of metal. The light from the laser is intense enough to heat the metal and cause it to melt, which allows the two pieces to fuse together.

Laser welding is a very precise process, and it can be used to create very strong welds. It is often used for delicate welds that need to be very strong, such as in aircraft or medical implants.

The main advantage of laser welding over other welding methods is that it can be done very quickly and with very little heat damage to the surrounding area.

What are the benefits of using a laser welding machine?

Laser welding machines have numerous advantages that make them ideal for a variety of industrial applications.

Some of the key benefits of using a laser welding machine include:


Laser welding is a fast process compared to traditional welding methods. The high energy density of the laser beam allows for rapid heating and cooling of the material, resulting in faster welding.

Non-contact process

Laser welding is a non-contact welding process, which means that the laser beam does not physically touch the workpiece, reducing the risk of contamination and damage to the material.


Laser welding machines are versatile and can be used to weld a variety of materials, including metals, plastics, and composites. They are used in various industries such as automotive, aerospace, electronics, medical, and jewelry.

Minimal post-processing

Laser welding typically requires minimal post-processing because it produces the fewest weld defects such as porosity, spatter, and burrs. This reduces the need for additional finishing or cleaning processes, saving time and money.

Automation capability

Laser welding machines can be easily integrated into automated production lines to achieve high-speed, high-precision welding operations. This improves efficiency, consistency and repeatability in the welding process.

Energy Efficiency

Laser welding is known for its high energy efficiency, as the laser beam can be precisely controlled and focused on the welding area, minimizing energy waste. This saves costs in terms of energy consumption.


Laser welding is a highly precise welding method that results in narrow, focused welds that minimize the heat-affected zone (HAZ) and reduce distortion.

Environmentally Friendly

Laser welding is a clean welding process that produces minimal fumes, spatter or radiation. This makes it more environmentally friendly compared to some other welding methods that may produce harmful by-products or emissions.

applications of laser welding

What are the applications of laser welding? 

Laser welding is a type of welding that uses a laser to create a weld. This process can be used to join two pieces of metal together or to repair a piece of metal that has been damaged. Laser welding is a very precise process, which makes it ideal for use in various industries.

Some of the most common applications of laser welding include:

  • Welding together small parts or components
  • Welding difficult-to-reach areas
  • welding in hazardous or difficult environments
  • welding together delicate or sensitive materials

Laser welding can also be used for decorative purposes, such as engraving or etching.

How to choose a laser welding machine?

Selecting a laser welding machine requires careful consideration of several factors.

Here are some key steps to help guide you in choosing the right laser welding machine for your specific needs:

Determine your welding requirements: Consider the type of material you will be welding, material thickness, joint configuration, and required welding speed.

Determine the laser type: Different types of lasers are used in laser welding, such as fiber lasers, CO2 lasers, and Nd:YAG lasers. Each has its own advantages and disadvantages in terms of power, beam quality, cost, and suitability for specific materials.

Evaluate Power and Beam Quality: The power of the laser determines the welding speed and penetration, while the beam quality affects the quality of the weld. Higher powered lasers generally allow for faster weld speeds and deeper penetration, but they can also be more expensive.

Assess welding automation needs: Determine whether you need manual or automated laser welding. Laser welding machines can be fully automated with a robotic arm or integrated into a CNC system for precision and repeatability.

Evaluate system features: Consider additional features that may be important to your specific welding application, such as pulse shaping, waveforms, and control options. Some laser welding machines offer advanced features that allow for precise control of the welding process, resulting in higher quality welds.

Consider safety and maintenance: Laser welding machines involve the use of high-powered lasers, so safety is paramount. Consider safety features such as interlocks, enclosures, and operator protection.


Laser welding machines are widely used in applications where precision, speed, and efficiency are critical because of their ability to produce high-quality welds with minimal heat-affected zones.

From automotive and aerospace to electronics and medical industries, laser welding machines have revolutionized the welding process and continue to be at the forefront of modern manufacturing. 

To learn more information about our products, please feel free to contact us at qllaser@qllasercut.com.

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