Suzhou SENLYON Industrial Technology Co., LTD.
Laser Cutting Machining

Laser Cutting Machining

Laser Cutting Machining

Laser cutting is a CNC process that uses high energy laser power to cut different materials. Laser cutting is a unique sheet metal cutting method because of its accuracy and versatility in different materials, although it is not as versatile as water jet cutting. But laser processing is the most popular because of its material adaptability, precision, and ability to perform both cutting and engraving tasks at the same time, which is not possible with water jet cutting. In addition, laser cutting costs are usually cheaper than water jet cutting.

Laser Cutting Machining

CO2 lasers

Commonly used to process wood, paper and acrylic plastics), leather, fabrics, wallpaper, and some foods such as cheese, chestnuts, and plants.

Fiber lasers

Suitable for metals, alloys and non-metals, such as glass, wood and plastics. While they are well suited for thin materials, fiber lasers can be used for a variety of materials depending on power, but thicker materials may require higher power machines.

Nd:YAG/Nd:YVO lasers

Used in many engineering fields such as medical, dental, military and manufacturing. These lasers are capable of processing both coated and coated metals as well as non-metals, such as engineering grade plastics, and in some cases ceramics. Nd: YVO4 crystals can be mixed with high NLO factor crystals to change the output from near infrared to green, blue or ultraviolet light.

Quality defects&Resolution

1. The formation of burrs

In laser cutting, burrs may appear as raised edges or rough surfaces on the cut part, affecting the appearance and function of the part. The problem can be caused by factors such as incorrect laser focus, too high cutting speed, or too low assist gas pressure.


Resolution

The laser should be adjusted to the maximum laser focus and beam quality for optimal cutting performance.

Adjust the machine's laser focus position, power density, and feed rate for a clean cut. Use the correct assist gases (e.g., nitrogen, carbon dioxide, nitrogen) and keep the pressure at the right level to help remove the molten metal.


2. Heat-Affected Zone (HAZ)

Laser cutting generates heat, which creates a heat-affected zone at the cutting edge. This area can alter the material properties, which in turn can affect the performance of the part.


Resolution

Cutting parameters such as laser power density, cutting speed, and focus should be optimized to reduce heat input.

Use state-of-the-art equipment such as nozzles, focusing lenses, and lights from the highest level of optimal parameter control.

Consider post-cut treatments, such as annealing or stress relief, to reduce the effects of the heat-affected zone and maintain material integrity.


3. Discoloration of the material

The machining process may discolor or oxidize the edges, affecting the appearance and surface quality of the part.


Resolution

Adjust the cutting parameters to reduce heat input, thereby reducing discoloration (E). G。 , power, laser focus position, speed).

Using the right assist gas to protect the material from oxidation during the cutting process is key.

Post-cut treatments, such as antibiotics, are extra steps taken after cutting to prevent infection, passivation, and improve the surface coating. These methods are used to make objects look aesthetically pleasing and to stop oxidation.


4. The process of twisting or twisting

High-power lasers cutting thin materials can cause warping due to high temperatures.


Resolution

Laser cutters that use high power and high frequency pulses will help reduce heat input, which will reduce the risk of warpage.

Make sure to use the correct jig or jigs to reduce material movement during cutting.


5. Slit width changes

The cut-out width is very important for the size and the accuracy of the assembly and must be the same to prevent negative effects on the cutting surface and seams.


Resolution

Verify the alignment and calibration of the laser.

The lens and laser source should be checked regularly to ensure that the beam quality is consistent throughout.

A closed-loop feedback system should be employed to monitor and adjust cutting parameters in real-time to keep the cut width constant.

Our laser cutting capabilities

Dimensional accuracy±0.005 inch
Positioning accuracy±0.1 mm
Thickness rangeMetal:0.2 ~ 25 mm 4 inches for some special materials such as foam board
Minimum processing size0.040 x 0.040 inch
Maximum processing size120 x 60 inch
Minimum cutting hole diameter0.0055 inch

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