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With the continuous development of the sheet metal processing industry, fiber laser cutting technology has played an important role in promoting the progress of social production.
The commonly used processing materials of fiber laser cutting machine are stainless steel, carbon steel, aluminum, copper, titanium, etc. When carbon steel fiber laser cutting machine uses oxygen as the processing gas, the cutting edge will be slightly oxidized When the thickness of the plate reaches 4mm, nitrogen can be used as the processing gas for high-pressure cutting. In this case, the cut edges will not be oxidized. For thin plates with a thickness greater than 10mm, laser-cut steel plates are used for special pole plates, and oil is applied to the surface of the workpiece during processing to obtain better results.
Two materials, copper and brass, have high reflectivity and good heat transfer performance. When the brass thickness is less than 1mm, it can be cut with nitrogen; when the thickness is less than 2mm, it can be cut with oxygen. Copper and brass cutting can only be performed on systems equipped with 'reflection absorption' devices. The reflector can destroy optical components.
Stainless steel and stainless steel are used in many industries. In the stainless steel cutting process, without affecting the edge oxidation, nitrogen is used to make the edge of the stainless steel not burr and not oxidized. After the oil film is coated, a better perforation effect can be obtained without affecting the processing quality.
Aluminum, aluminum fiber laser cutting machine uses aluminum fiber, which has high reflectivity and thermal conductivity. According to the alloy type and laser performance, aluminum thickness below 6 mm can be cut. When oxygen cutting, the cutting surface is rough and hard. After adding nitrogen, the cutting surface is smooth. Because of its high purity, it is difficult to cut. Aluminum can be cut only after the 'reflection absorption' device is installed in the fiber laser cutting machine system. The reflector can destroy optical components.
Titanium plates are cut with argon and nitrogen as processing gases. For nickel-chromium steel, please refer to other parameters.
As we all know, various materials will have more or less problems in the processing process. So how to solve these problems and make the quality of processing more reliable?
When laser processing and cutting stainless steel and aluminum-zinc plates, there are burrs on the workpiece. First of all, you must look at the burrs when cutting stainless steel. You can check whether the nozzle needs to be replaced, whether the guide rail moves, etc. . However, the cutting speed is not ruled out. The cutting speed sometimes causes the cutting of the sheet to not penetrate. This situation is particularly prominent in the processing of aluminum-zinc plates.
The small hole cutting deformation produced during the processing is mainly caused by the pulse perforation rather than the blasting method during the processing. Therefore, too much laser energy is concentrated in a very small area, and it will also scorch the non-processed area, form hole deformation, and affect the processing quality. At this time, the pulse perforation should be changed to blasting in the processing program to solve this problem. Contrary to laser cutting machines with lower power, pulse perforation should be used when processing small holes to obtain a better surface finish.
Abnormal sparks appear in the carbon steel cutting process, which will affect the smoothness and processing quality of the cut part of the part. At this time, when other parameters are normal, the following conditions should be considered: laser head nozzle loss, if it is worn, the nozzle should be replaced in time (if there is no new nozzle replacement, the operating gas pressure of the incision should be increased); whether the thread at the junction of the nozzle and the laser head is loose If it is loose, the cutting should be suspended immediately, and the thread should be tightened again.
The material processing methods and existing problems of fiber optic cutting machines are different. The materials that can be processed by the optical fiber laser cutting machine cover most metals, and the problems in the cutting are also different. The specific analysis should be based on the actual cutting situation and timely feedback to the manufacturer for technical guidance.
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