How to choose the laser cutting head

        When WSX's business communicated with many customers, it was found that these customers lacked the knowledge and experience of laser cutting machines that suit their needs or how to judge the cutting quality standards of laser cutting machines. Below, the small series lists a few customer references that are necessary:

       1. Rough: The laser cut portion will form a vertical line whose depth determines the roughness of the cut surface. The lighter the line, the smoother the cut. Roughness not only affects the appearance of the edges, but also the friction characteristics. In most cases, the roughness needs to be reduced as much as possible, so the shallower the particles, the higher the cutting quality.

       2. Material deposition: The laser cutter encounters a special oil-containing liquid on the surface of the workpiece before melting and perforating. During the cutting process, the customer blows the slits with the wind due to gasification and the use of various materials, but the upward or downward discharge also forms deposits on the surface.

       3. Depression and Corrosion: Degeneration and corrosion have an adverse effect on the surface of the cutting edge and affect the appearance. They appear in cutting errors that should normally be avoided.

       4. Burr: The formation of burrs is a very important factor in determining the quality of laser cutting. Because the extra work is required to remove the burrs, the severity and quantity of the burrs can directly determine the quality of the cut.

       5. Heat affected area: In laser cutting, the area near the cut is heated. At the same time, the structure of the metal has also changed. For example, some metals will harden. The heat affected zone refers to the depth of the area where the internal structure changes.

       6. Verticality: How the thickness of the metal plate exceeds 10 mm, the perpendicularity of the cutting edge is very important. When away from the focus, the laser beam becomes divergent and widens toward the top or bottom depending on the position of the focus. The cutting edge is a few millimeters from the vertical line, and the more vertical the edge, the higher the cutting quality.

       7. Deformation: If the cutting causes the part to heat up sharply, deformation will occur. This is especially important in finishing because the profiles and connectors here are typically only a few tenths of a millimeter wide. Controlling laser power and using short laser pulses can reduce component heating and avoid distortion.

       8. Cutting width: In general, the width of the slit does not affect the quality of the cut. The cutting width plays an important role only when a particularly precise contour is formed inside the component. This is because the cutting width determines the minimum inner diameter of the profile. As the thickness of the panel increases, the cutting width also increases. Therefore, in order to ensure the same high precision, the workpiece should be kept constant in the processing area of the laser cutting machine regardless of the width of the slit.

       9. Texture: When the slab is cut at high speed, the molten metal does not appear in the slit below the vertical laser beam, but instead is emitted on the back side of the laser beam. As a result, a curve is formed at the cutting edge, and the line closely follows the moving laser beam. To correct this problem, reducing the feed rate at the end of the cutting process can greatly eliminate the formation of lines.