2023 Best Laser Cutting Machine for Sale

The fiber laser cutting machine belongs to the laser cutting machine. It works by gathering the energy of the laser beam to melt and vaporize metals and then cut them. Metal laser CNC features high precision, speediness, unlimited cutting pattern, automatic layout, material saving, smooth cutting edge, and low processing costs. In addition, it generates a high yield with low heat impact and deformation.

The metal laser cutter works by gathering high-energy and high-density laser beams generated by the laser onto the metal surface. The irradiated area is instantaneously melted and vaporized. The CNC system is used to direct the laser beam to move across designated areas to actualize automated cutting. The stainless steel laser cutter categorizes into high-tech equipment that integrates laser technology, precision machinery technology, and CNC technology.

Auxiliary gases suitable for corresponding materials cut are applied during laser cutting. When cutting steel, oxygen is used as auxiliary gas to produce a thermochemical reaction with the molten metal to oxidize the material and to help blow away the slag in the kerf. Nitrogen is used as an auxiliary gas for industrial applications to process metal with high precision.

Reasons for bur-generation during the use of the carbon steel laser cutter are:

• The width of the kerf deviates from the initial optimum and becomes narrower or wider.
• The processing shape affects the flow continuity of the molten metal.

Compared with traditional cutting methods, the fiber laser cutter has the characteristics of low cost, low consumption, high speed, safety, and easy maintenance. In addition, no mechanical forces exerted on metals during processing generate high-quality and high-precise products. Despite all of these advantages, higher quality can be achieved by reducing burs. Two ways to solve burs are as follows:

• Change of the kerf width

The focal position of the oxidation-free cutting of stainless steel needs to be set inside the material to improve melting fluidity and widen kerf, which is different from carbon steel cutting. If the focal position is not set properly and deviates from the optimal value, the fluidity of the molten metal within the kerf will decrease. When the focal point is too shallow, the bur is relatively sharp, while when the focal point is too deep, the bur is spherical. When adjusting the focal point position, the best position can be found according to the shape of the bur.

• Observation of the frontal sharp corner

Burs are generated easily when auxiliary gases become unstable after the laser beam passes through the front of the sharp corner or when power and speed become unstable due to a sharp change in cutting speed. This can be solved by reducing the value of the cutting speed. Lower speed can reduce burs effectively if the angle of the sharp corner becomes smaller. Moreover, changing from low speed to high speed requires the step-by-step setting of the speed switch of the fiber laser cutting machine.

The reason why it is difficult to cut laminated sheet metal with the metal laser cutting machine is that the cutting head can only cut down from the top of the sheet metal. The protective film on top of the sheet metal does not affect the results during the cutting process, but the cutting residues generated during the cutting process can not completely drop due to the protective film below. These residues directly affect the cutting quality, that is, resulting in no cut-through of the sheet metal or the generation of burs. The sheet metal will be scratched if all the films underneath are removed. Therefore, a reasonable processing procedure is essential.

• Draw an auxiliary cutting diagram matchable to the actual one.

The specific means is to mirror the actual cutting diagram to directly get the auxiliary one.

• Determine the location of the film to be removed and the maximum offset.

Theoretically, use auxiliary cutting diagrams to etch off the protective film of the cutting position on the sheet metal. Next, cut directly on the flip side of the metal. However, in the actual cutting process, the cutting position of the top and back of the sheet metal is not possible to overlap due to the laser positioning error and the shape error of the sheet metal. Therefore, the exact offset should be measured during etching on the top and the protective film should be removed from the offset position.

• Draw cutting drawings and auxiliary cutting drawings.

The cutting drawing can be drawn directly according to the shape of the sheet metal. For the auxiliary cutting drawing, mirror the actual cutting drawing first and then offset with the error value set.

• Arrange the layout of the laser cutting drawing

Firstly, arrange the layout of the auxiliary cutting drawings and then mirror the auxiliary cutting drawing, delete etched lines and only retain the actual cutting diagram.

• Laser cutting

Firstly, arrange a layout to etch, and then tear off the protective film around the kerf. After that, turn the steel over for cutting.