Laser cutting technology is popular because of its flexibility and wide application range. In addition, the process is highly automated, which helps in improving the material utilization ratio and lowering the processing cost. Many companies that make brass metal parts also use this technology because of its high efficiency and economy.
Carbon dioxide (CO2) lasers are great for cutting stainless and mild steel. However, they are less effective at cutting highly reflective metals. For this reason, it is better to use fiber lasers with a higher average power. A fiber laser is also a good option for cutting thick plates. Fiber lasers can balance their output so that the cut produces minimal dross and regular striations. However, if the sheet thickness is over 10 mm, you may want to use an HD plasma machine instead. These laser cutters are faster and have a smoother cut edge.
Although the cutting speeds of CO2 lasers are higher, they cannot compete with the rates of fiber lasers. A fiber laser is less likely to cause material damage and can cut up to three times faster than a CO2 laser.
While many people think that a laser can cut only carbon steel, the fact is that the same technique can be used to laser cutting brass sheet. The key to cutting brass effectively involves using higher laser power and a reflective absorption device. This technique will produce an edge about half the width of the workpiece.
On the other hand, carbon dioxide lasers use carbon dioxide as the gas medium. They can make powerful cuts on thick material and have a continuous light beam. The gas discharge is composed of carbon dioxide mixed with other gases such as helium, hydrogen, and nitrogen. Meanwhile, ND lasers use solid crystals to focus light onto the workpiece. They produce a rhythmic infrared beam.
Although fiber lasers can cut brass, it is important to back off the maximum feed rate by ten to fifteen per cent. The laser must penetrate the material first and create a piercing hole. It is not wise to cut brass at speeds higher than the laser can support, and it is also important to allow ample dwell time before and after cutting.
There are two types of lasers: continuous wave and pulsed. The continuous wave laser is always on, while the pulsed laser is turned on and off rapidly. The pulsed laser delivers energy in short, high-peak-power pulses. The pulsing action is responsible for most of the laser’s benefits. It allows the material to dissipate localized heat in between pulses. This results in a cleaner cut and a better edge quality.
Oxygen-assisted reactive cutting
Oxygen-assisted reactive cutting with laser cutter sheets is a technique that uses an auxiliary gas during the cutting process. This gas protects the laser beam from the atmosphere, allowing it to cut thicker materials. The high-velocity gases also remove melted metal from the metal sheet, reducing the amount of heat generated. While oxygen is the most common assist gas, nitrogen is also an option. It produces cleaner cuts than oxygen. This cutting method is effective on mild steel up to four millimeters thick. However, cutting stainless steel is not recommended as it contains small amounts of chromium, reducing flexibility and making it more challenging to cut.
Oxygen-assisted reactive cutting is an alternative method to cutting sheet metal with a laser. Using this method allows a laser to cut metal with a greater degree of precision. It is a more efficient way to cut thin metals and can result in a better surface finish.
The process involves cutting a workpiece with a laser beam controlled by computer numerical control (CNC). The laser beam is focused onto a specific spot on the workpiece, and the intensity of the laser beam causes the material to melt or burn. The beam then penetrates the other side of the material and begins the cutting process.
Diode lasers are cheap and are usually mounted on smaller laser cutters. However, they do not cut acrylics or brass. Some machines can cut acrylics.