Laser cutting machine is widely used in many industries, especially in metal processing industry. However, there is no unified standard for the quality of laser cutting, so many people don't know how to judge the processing quality of laser cutting machines when buying laser cutting machines, and fall into blindness. Therefore, technicians come to talk about how to evaluate the quality of laser cutting machine when processing metal.
How to judge the quality of laser cutting metal? The cutting surface is smooth, with few lines and no brittle fracture
When the laser cuts the plate at high temperature, the trace of molten material will not appear in the notch below the vertical laser beam, but will be sprayed out at the back of the laser beam. As a result, the curved lines are formed at the cutting edge, and the lines closely follow the moving laser beam. In order to correct this problem, reducing the feed rate at the end of the cutting process can greatly eliminate the formation of lines.
How to judge the quality of laser cutting metal? See the slit width
Generally speaking, the cutting width does not affect the cutting quality. Only when a particularly precise contour is formed inside the part, the cutting width has an important impact, because the cutting width determines the smaller inner diameter of the contour. When the thickness of the plate increases, the cutting width also increases. Therefore, in order to ensure the same high precision, no matter how wide the notch is, the workpiece should be constant in the processing area of the laser cutting machine.
How to judge the quality of laser cutting metal? Good perpendicularity of cutting seam and small heat affected area
When the thickness of the processed material exceeds 18mm, the perpendicularity of the cutting edge is very important; When away from the focus, the laser beam becomes divergent, and the cutting becomes wider towards the top or bottom according to the position of the focus. The cutting edge deviates from the vertical line by a few percent. The more vertical the edge is, the higher the cutting quality is.
How to judge the quality of laser cutting metal? Thermal effect of cutting material
As the application equipment of thermal cutting processing, it is bound to cause thermal impact on materials in the process of use, which mainly includes three aspects, namely Heat affected area, depression and corrosion, material deformation.
The heat affected area refers to the area heated along the incision in laser cutting. At the same time, the structure of the material itself changes. For example, some materials will harden. Heat affected zone refers to the regional change of internal structure due to high temperature.
The depression and corrosion have an adverse effect on the surface of the cutting edge and affect the appearance of the laser cutting machine. They appear in cutting errors that should be avoided in general; After cutting, if the part is heated sharply, it will deform.