Method for detecting cutting quality of laser cutting machine

Date:2018-05-18



1. Smooth cutting, no stripes, no brittle fracture; When the metal laser cutting machine cuts the thick plate at high speed, the molten metal will not appear in the incision below the vertical laser beam, but will spray 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. To correct this problem, the feed rate is reduced at the end of the cutting process, and the formation of the lines can be greatly eliminated.
  
2, narrow slit width, which is mainly related to the size of the laser beam spot size; metal laser cutting machine incision width does not affect the cutting quality in general, only in the interior of the part to form a particularly precise contour, the cutting width has an important impact, this This is because the cutting width determines the minimum inner diameter of the profile, and as the thickness of the plate increases, the cutting width also increases. So you want to ensure the same high accuracy, regardless of the width of the incision, the workpiece in the laser cutting machine processing area should be constant.
  
3, the verticality of the slit is good, the heat affected zone is small; under normal circumstances, metal laser cutting

The machine mainly concentrates on the processing of materials below 5mm. The verticality of the section may not be the most important evaluation factor. However, for high-power laser cutting, when the thickness of the processed material exceeds 10mm, the perpendicularity of the cutting edge is very important. When away from the focus, the laser beam becomes divergent, and the cut widens towards the top or bottom depending on the position of the focal point. The cutting edge is a few hundredths of a millimeter from the vertical, and the more vertical the edge, the higher the cutting quality.

4. There is no material burning, no melting layer formation, no large slag; The slag of the metal laser numerically controlled cutting machine is mainly reflected in the deposition and cross-section burrs, in which the material deposition is due to the laser cutting on the surface of the workpiece before it begins to melt and perforate. Touch a special liquid containing oil. Gasification and various materials do not use the wind to blow out the incisions, but the upward or downward discharge will also form deposits on the surface. The formation of burrs is a very important factor in determining the quality of laser cutting, because the removal of burrs requires extra work, so the severity of the burr and how much it can be visually judged the quality of the cut.
 
5, the incision surface rough plating, the size of the surface roughness is the key to measuring the quality of the laser cutting surface. In fact, for the metal laser cutting machine, the cutting profile and roughness are directly related to each other. Often, the poor cutting performance of the profile will directly lead to higher roughness, but considering the difference in the causes of the two different effects, Generally, when we analyze the processing quality of metal laser numerical control cutting machine, we still analyze it separately. The laser cutting section will form vertical lines. The depth of the lines determines the roughness of the cutting surface. The shallower the lines, the smoother the cutting section. Roughness not only affects the appearance of the edge, but also affects the frictional properties. In most cases, the roughness needs to be reduced as much as possible, so the lighter the lines, the higher the cutting quality.