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What is laser cutting?



Laser cutting is a technology that uses a beam of light referred to as a Laser to produce very fine cuts via vaporization of the material that the laser is focused on.

Its initial applications were seen in the industrial field, but recent advances in technology have seen it get used in hospitals (you can get more details through architectural tasks, enterprises, and schools.

a piece of laser-cut wood

It simply works by focusing a powerful beam of light using optics and a “Computer Numerical Control (CNC)” module on the material requiring cut.

Sometimes a motion control module is incorporated to make the cutting of pattern-like and complicated cuts on a given material possible.

The material that is lasered either evaporates or gets blown by using a stream of pressurized air (Oberg Industries, n.d.). The above methods leave a fine cut noticeable by its high-quality edges (Thomas, 2012).

How is a laser-produced?

To know how this technology works, firstly, we need to see this question. It is generated by a laser that emits a horizontal laser beam that is transformed by a 45° total reflector into a vertical downward laser beam.

These laser beams are focused by a lens and form a tiny spot at the focal point.

When the spot hits the material, the material is quickly heated to a vaporizing temperature where it evaporates and forms a hole.

As the beam moves on the material, it is matched with auxiliary gases (such as CO2, oxygen, nitrogen, etc.) to blow away the melted slag so that the hole is continuously formed with a very narrow width (such as about 0.1mm) of the cut, thus completing the cutting of the material.

Common types of lasers

Several types of lasers exist now, but the three most common ones are; CO2, Neodymium (ND), and Neodymium Yttrium-Aluminum-Garnet (Nd: YAG) lasers.

  1. They are used in different fields and materials. Neodymium laser is best suited for drilled materials that require repetitive motion and high energy.
  2. Neodymium Yttrium-Aluminum-Garnet laser is the most suitable for high-intensity boring and engraving.
  3. The CO2 laser can engrave and bore on different materials.

Classifications of laser-cutting

There are many usages for laser cutting, and different methods are used to cut different materials. The most common laser cutting methods are Vaporization, Melting and Blowing, Thermal Stress Cracking, Stealth Dicing, and Reactive Cutting.

Here’s a summary of the listed methods.

1. Vaporization Cutting Method

Heat the pieces with a high energy density laser beam and vaporize in a short time, then form a vapor. Cuts are formed on the material surface. The heat of vaporization is generally large, so considerable power and power density are required for laser vapor cutting.

Laser vaporization is mainly used to cut fragile metallic and non-metallic materials (such as paper, cloth, wood, plastic, and rubber).

2. Melt And Blow Method

In laser fusion cutting, the metal material is melted by laser heating, and the nozzle blows non-oxidizing gases (Ar, He, N, etc.), relying on the solid pressure of the gases to expel the liquid metal and form the cut. The energy required is only 1/10 of vapor cutting.

Laser melting cutting is mainly used for materials that are not easy to oxidize or reactive metals, such as stainless steel, titanium, aluminum, and its alloys.

3. Thermal Stress Cracking

The more brittle material is, the more it is usually susceptible to thermal-induced fractures.

Thermal stress cracking builds upon this feature, making it efficient for brittle materials. The method involves focusing a beam of light onto a surface resulting in localized heating. This localized change in temperature results in an expansion that causes uniform cracking.

The cracking depends on the laser and is usually measured in speed SI unit m/s. This method is very efficient when used to cut through glass and lightweight ceramic.

4. Reactive Cutting

Also referred to as Flame Cutting, it uses the laser as a preheating heat source and an active gas such as oxygen to cut gas. On the one hand, the gas is blown out acts with the cutting metal, and an oxidation reaction occurs, releasing a large amount of oxidation heat; on the other hand, the molten oxides and melts are blown out from the reaction area, while the cutting speed is far greater than laser vapor cutting and melting cutting.

Laser oxygen cutting is mainly used for carbon steel, titanium steel, heat-treated steel, and other easily oxidized metal materials.

5. Stealth Dicing

It’s a method that uses the Neodymium Yttrium-Aluminum-Garnet laser to cut through silicon wafers. It is mainly used to cut through silicon as the 1064 nm wavelength is well suited for the 1117 nm Silicon electronic bandgap.

Characteristics of laser cutting

  1. As mentioned earlier, laser cutting has very high precision. It is possible to make a thin and narrow cut with parallel sides of the cut. The accuracy of the cut material can be made to ±0.05mm.
  2. A laser cutting machine usually contains multiple CNC tables, and the entire cutting process can all be CNC controlled. You only need to change the CNC program to cut different shapes of materials.
  3. The laser cutting process has low noise with no environmental pollution.
  4. The laser can cut various materials, including metal, non-metal, metal-based, and non-metal-based composites, leather, wood, fiber, etc.

Applications of laser cutting

Laser cutting has a wide range of applications, in addition to the initial industrial manufacturing field and other areas.

Most parts need to be reproduced quickly and accurately in the automotive industry. There is nothing more suitable than laser cutting. In addition, laser cutting is also used for the top windows of automobiles, such as the German Volkswagen Company, which uses a laser with a power of 500W to cut intricately shaped thin body panels and various curved parts.

In the aerospace industry, aerospace parts of laser cutting include engine flame barrels, titanium thin-walled chassis, aircraft frames, titanium skins, wing trusses, tail fins, main helicopter rotors, space shuttle ceramic insulation tiles, etc.

In the medical industry, surgeons use laser cutting machines to perform high-precision surgery on delicate body parts. For example, eyes.

In the chip industry, laser cutting is used to make small, precise silicon parts for semiconductor chips.

In the jewelry industry, laser cutting's ability to make tiny cuts has reduced the waste of jewelry manufacturing materials and thus increased profitability.

In the industry of 3D puzzle and other toys, such as ROBOTIME. We select this technology to produce wooden puzzles and miniature dollhouses. ROBOTIME uses CO2 laser cutting technology, which controls the error within 0.05mm and accurately reproduces all the model details.

ROKR Swing Ride DIY Music Box 3D Wooden Puzzle EA02

The most significant benefit is that the wooden puzzles can be together without glue. If the precision of a laser cutter is lower than the required tolerances of the pieces, the resulting puzzle will either require excess force or sanding to assemble or be too loose to stay together without glue.

Why talk about this?

First, ROBOTIME's products are closely linked with laser cutting, and we want to tell our users through this post. Through laser cutting, we can ensure the quality of our products.

At the same time, we are trying our best in environmental protection regardless of material ability and process.

Last thought

Laser cutting is widely used in our lives, and we can't help but marvel at the changes and help that technology has brought to life. At the same time, laser cutting is becoming more and more popular in the miniature world, which makes people's life a more exciting experience. As a handcraft lover in the miniature world, knowing the story behind 3D puzzles is significant.


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NOTE: This is a digital file. Not a physical product.



- Formats: DXF, EPS and CDR

- Ready to be used in laser and / or CNC Router

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Animals Toys Butterfly




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Basilica of Guadalupe


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Eiffel Tower various measures



Football stadiums

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BUILDINGS (Eiffel Tower, Castles, White Houses, Sphinx, Football Stadiums, Roman Coliseum, Egyptian Pyramids and many..)

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