How to set the parameters of sheet metal fiber laser cutting machine
At present, the virtual site construction efficiency of the laser cutting simulation software is low, the platform switching is complicated, the learning cost is high, the realization of the cutting trace is insufficient, and the process processing module is not perfect. This article analyzes how to set the parameters and quality control of the sheet metal fiber laser cutting machine.
Parameter setting of sheet metal fiber laser cutting machine
The parameters of the sheet metal fiber laser cutting machine include cutting speed, power, gas cutting and so on. Laser cutting analyzes cutting quality and cutting efficiency separately, and analyzes different types of effects, but through the combination of laser cutting to achieve various required parameters. Under the best configuration, different factories will conform to the cost structure, and quality and efficiency will be paid special attention to a certain extent.
The laser head of the laser cutting machine can move along the shape of the part in a unit time. The higher the laser cutting speed, the shorter the cutting time, and the higher the laser cutting production efficiency. However, when other parameters are fixed, the laser cutting speed is not linearly related to the cutting quality. The reasonable cutting speed is a range value. Below this range value, too much energy of the laser beam remains on the surface of the part, resulting in excessive combustion. If the value exceeds this range, the energy of the laser beam is too late to completely melt the material of the part, which makes it difficult for cutting to penetrate.
The laser output power is the output energy of the laser system, and laser cutting represents the ability of the laser beam to melt the material per unit time.
The laser output is finally focused on the point with the highest power density through a special lens. The focal spot diameter is proportional to the focal depth of the focusing lens. The focus of the sheet metal fiber laser cutting machine is set according to different thicknesses at different positions. The correct focus position is an important condition for obtaining stable cutting quality. The cutting quality of laser cutting is not only related to the laser beam, but also to the characteristics of the laser beam focusing system, that is, the size of the laser cutting after focusing has a great influence on the laser cutting quality.
Gas support pressure
A cut is formed in the gap. Proper air pressure can help speed up the laser cutting, and the auxiliary air pressure will also affect the cutting efficiency of the sheet metal fiber laser cutting machine. If the thickness of the laser cutting material increases or the cutting speed is slow, the air pressure should be appropriately reduced. Cutting with lower air pressure can prevent frosting.
The focused laser is applied to the surface of the part through a copper nozzle. The distance between the workpiece and the laser nozzle is called the nozzle distance. The distance from the nozzle to the part is measured based on flow and pressure. The blowing force of the gas that is too far away is too large, and the exhaust flow is too large, which will affect the splashing. The proper distance is 0.8-1.0mm. Choose different types of nozzles according to different material thicknesses.
For example: For a material with a thickness of 3 mm, adjust the focus position to -4 mm, the nitrogen cutting pressure is 12 Pa, the nozzle distance is 1 mm, the power of the metal sheet fiber laser cutting machine is 3000 W, and the cutting speed is 12 m/min. Because the various parameters have been well adjusted and the cutting conditions are good, after various tests, after adjusting the parameters to the most suitable conditions, the cutting surface will be smooth.