What is A Laser Welding Machine? How Does it Work?

What is A Laser Welding Machine?

Laser welding machines and laser welding technology is becoming very popular with the advent of the latest laser generation technologies. In short, laser welding is the process of joining metallic bodies or thermoplastics using a laser beam.However, unlike the other conventional welding processes, laser welding can complete the job in much lesser time.

Laser welding is a non-contact method that uses a concentrated laser beam to assemble metallic components. This type of welding is ideal for applications requiring high speeds or low thermal distortion. In addition, the ability to precisely control welding quality during the process has made laser welding machines the preferred method for high-quality welding.

With the latest laser generation technologies, laser welding machines and laser welding technology are becoming increasingly common. A laser welding machine uses a laser beam to join metals or thermoplastics.

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How Does A Laser Welding Machine Work?

Laser Welding Technology

The laser welding technology works based on the principle of heat generation by the laser source. Sources of laser in the method also vary and different sources of lasers are suitable for different types of materials and their physical and chemical properties.

Thus, when the beam of high laser energy is focused on a spot of the metal sheet it creates the metal sheet to melt at the spot. The depth of the hole is managed by the various methods of welding and varies accordingly.

This process takes place at the seam of the two metals or materials to be welded together. However, there are multiple methods of laser welding that depend on the type, thickness, and quality of materials to be weld.

Laser Welding Methods

There are multiple methods of laser welding that are largely in use in various industries. Let’s discuss some of these laser welding techniques for you to get a better idea of the process of laser welding.

  • Conduction Mode Welding

Conduction welding is a method that provides you with a wide weld that is shallow. There is a further categorization of this method of welding as follows:

  • Direct heating method

The direct heating method uses thermal conduction from the source of heat. Subsequently, this results in the melting of the base material and ultimately making the weld with the other material.

  • Energy transmission method

In comparison, the energy transmission method is slightly different and makes use of an intermediate material that conducts the heat from the source to the weld. Usually, it is the absorbent ink that acts as the intermediary material for the transfer of energy.

Similarly, butt joints are also possible by directing the heat energy at an angle of the joint.

  • Conduction/Penetration Mechanism

This mechanism works on medium energy and creates a deeper hole than the conduction method but is shallower than the penetration method.

The other way to weld by using a laser is by using the keyhole method. This method focuses the beam of the laser onto the material and creates deep penetration of heat. Thus, a hole is created on the spot by this method.

This hole is later filled with metal vapor that forms a bonding material with the other metal. Therefore, the resulting weld makes a great depth to width ratio and creates tight welds that are durable.

  • Penetration or Keyhole Welding Mechanism

Laser Welding Machine Advantages

  • High laser energy density, which is especially beneficial for the welding of materials with high melting points and high thermal conductivity.
  • Large depth of the welding joint, low heat energy, and small heat-affected zone, all of which are especially suitable for the welding of precision and heat-sensitive parts without the need of processing orthopedic parts or other processing improvements after welding.
  • No metal filling is needed in general.
  • Possible to transmit laser through the transparent workpieces to weld it to prevent impurities contamination and corrosion, which is suitable for the welding of vacuum instrument
  • Highly flexible welding system, which is easy for automation.
  • Without laser welding residue, which makes it more suitable for products like pharmaceutical ones produced by the State Food and Drug Administration and electronic sensors.
  • Easy operation, possible to weld workpieces with a small size or complex shape, structure, and even 3D surface. It is possible to weld areas where other welding methods fail to do.
  • Pressure on the welded workpieces is not needed, small overall deformation, and minimum damage to the surface of the endothermic coating.
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Handheld Laser Welding Machine Price

Handheld laser welding machine features 1000W, 1500W, or 2000W fiber laser beam for welding joints of butt, edge, corner, tee, and lap. The handheld manual laser welder is used for welding carbon steel, stainless steel, aluminum, brass, copper, iron, silver, gold, and more tube & sheet metals. The portable handheld fiber laser welding machine will take over the traditional argon arc welding, MIG & TIG welding, and electric welding for metal joints.

Handheld Laser Welding Machine Cost:

The average cost of a handheld laser welding machine is around $7,980 depending on the fiber laser powers based on the data from Google, Amazon, and Sinbadlab. A cheap portable laser welder with 1000W fiber laser source is priced from $5,500 for beginners with hobbyists in home use. An affordable 1500W handheld fiber laser welding machine cost start at $7,800 for small business with low cost. The top rated portable fiber laser welder machine with 2000W handheld laser welding gun will cost $10,500 for commercial use in industrial manufacturing.

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Application of Laser Welding Machine

At present, there are many types of laser welding machines on the market, such as automatic laser welding machines, laser welding machines for jewelry, laser spot welding machines, fiber transmission laser welding machines, laser galvanometer welding machines, and handheld laser welding machines.

Laser welding is a vibration-free welding technology, which is especially suitable to process precise electronic components, such as mice, mobile phones, and connectors, and those complex parts that need to be welded in a cleaner way, such as plastics with circuit boards and medical equipment. Laser welding machines have a wide range of applications, which to some extent benefit from their advantages and market demand.

The application fields of welding machines include laser welding for plastics, laser welding for auto parts, laser welding for medical devices, laser welding for electronic components, laser welding in the field of aviation, laser welding in the field of glass processing, laser welding in the field of rail transit, etc. Some specific categories and advantages of laser welding machines used in these fields are as follows:

There are many advantages of laser welding machine used in plastic parts welding, such as high welding precision, firmness, airtightness, watertightness, less resin degradation during welding, less debris generated, and tightly welding of the surface of the product around the welding joint.

Fiber laser welder machines can weld a wide variety of automotive components, such as automatic door locks, keyless switches, fuel nozzles, shift gears, engine sensors, cab racks, hydraulic tanks, filter mounts, headlights, taillights, etc.

A laser welding system can weld various medical devices, such as liquid filtration equipment, hose connectors, hearing aids, transplant tools, etc..

In the field of electronic components, using traditional welding processes, there will be excessive temperature and radiation on the welding surface, which damage the electronic components themselves, cause electronic components to break or have a poor connection, etc., and affect the surrounding environment. These adverse effects can be solved by relevant means, which undoubtedly shorten the lifespan of electronic components, and even affect their normal functioning.

The laser welding machine has the excellent characteristics of being able to heat in a small local range and can also accurately control the local temperature of the welding for electronic components, so it has been widely used in the field of laser welding for electronic components. In simple terms, the laser welding machine can achieve an ideal state of generating a higher average temperature in a small area without adversely affecting the surrounding area.

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