Main advantages of laser cutting
Laser cutting will not produce cutting force, and will not cause workpiece deformation in the processing process; There is no trouble of tool wear, so it has good adaptability to different materials; High machining precision and simple process. Whether the parts are simple or complex in structure, they can be accurately and quickly shaped and cut by laser cutting machine at one time; The cutting quality of laser cutting machine is good, which can get very narrow slits and increase the utilization rate of materials; Moreover, it has a high degree of automation and is easy to operate. It can realize automatic cutting layout and nesting, which maximizes the labor cost and has good economic benefits; In addition, this processing method also has the advantage of no pollution, which is a green and ecological processing method.
In the process of programming the laser cutting machine, the operator should pay attention to the following points:
Check out of intersection position
Before laser cutting, the operator needs to adjust the position of the laser beam focus on the workpiece according to the different materials of the workpiece in advance. Because the laser beam, especially the gas laser beam represented by carbon dioxide laser beam, belongs to non visible light, which cannot be observed by the naked eye, wedge-shaped propylene block can be used to detect the focus position, and then the focus can be at the set position by adjusting the height of the cutting torch.
Key points of piercing operation
After the actual cutting process starts, if the part needs to be cut from the inside of the plate, it needs to punch holes on the plate in advance. The general method is to use continuous laser to pierce the thin plate, supplemented by auxiliary gas with normal pressure. When the beam irradiation time reaches 0.2 seconds to 1 second, it can penetrate the workpiece, and then the subsequent cutting can be carried out.
When the thickness of the workpiece is large, the gas with normal pressure is also used to complete the perforation, which will form a relatively large solution pit on the surface of the workpiece. This will not only affect the quality of the subsequent cutting, but also the splashing of molten substances may cause damage to the lens and nozzle of the laser cutting machine. In this case, the correct method is to appropriately increase the pressure of the auxiliary gas, while slightly increasing the aperture of the nozzle and the distance between the nozzle and the workpiece. In this way, high-quality holes can be made on the thick plate, but this method also has a disadvantage, that is, the gas flow is larger and the cutting speed will be reduced.
Prevent burning at the sharp corner of the workpiece
When the workpiece to be cut has a sharp corner structure, you must be extra careful in the cutting process. Because when cutting parts with acute angles with continuous laser, if the cutting parameters do not match or the operation is improper, it is very easy to self burn at the turning point of the acute angle, so that the sharp corners at the corner cannot be cut. This not only makes the quality of this part worse, but also affects the subsequent cutting. The way to solve this problem is to choose appropriate cutting parameters, or to use pulsed laser beam for cutting. There is no concern about the burning at the sharp corner when cutting with pulse laser.