What Are The Factors That Affect Laser Cutting?
Factors Affecting Laser Cutting:
Power, focus position, nozzle size, shape, height, cutting speed, auxiliary gas, processing material, etc. The company has done a lot of research and testing on multiple influencing factors, and has formed a complete cutting database, which can be completed by just calling.
(1) Laser power: It mainly depends on the type of cutting and the properties of the material to be cut. The laser power required for melting cutting is larger, followed by oxygen cutting. Laser power has a great influence on cutting thickness, cutting speed and kerf width. Generally, the laser power is increased, and the material can be cut
The thickness of the cutting edge is also increased, the cutting speed is also accelerated, and the kerf width is also increased.
① The power is appropriate, the cutting surface is good, and there is no dissolving;
②The power is too low to cut;
③ If the power is too large, the entire cutting surface will melt;
④Insufficient power, resulting in dissolving after cutting.
(2) Focus position: refers to the relative position of the focus point from the surface of the material to be processed. The upper direction of the material surface is defined as positive, and the lower direction is defined as negative. The focus position will affect almost all processing parameters such as the width, slope, roughness of the cutting surface, and cutting speed.
ring. Changing the focal position means changing the spot size on the surface and inside of the sheet, the focal length becomes larger, the spot becomes thicker, and the slit becomes wider and wider, which in turn affects the heating area, slit size and slag discharge capacity.
(3) The role of the nozzle:
①Prevent dissolving and other debris from rebounding on the net and contaminating the upper lens;
②Control the gas diffusion area and size, thereby controlling the cutting quality.
(4) Cutting speed:
Cutting speed directly affects the kerf width and kerf surface roughness. Depending on the plate thickness of different materials and different cutting gas pressures, the cutting speed has an optimum value, which is about 80% of the limit cutting speed.
Appropriate cutting speed: the cutting surface presents a relatively smooth line, and there is no dissolving in the lower half;
The cutting speed is too slow: ① cause over-melting, and the cut surface is rough; ② the cutting becomes wider, and the entire sharp corner is melted;
The cutting speed is too fast: ①It may not be able to be cut through, sparks are sprayed randomly; ②Some areas can be cut through, but some areas cannot be cut through; ③The entire section is thick, but no melting stains are produced; ④The cutting section is oblique stripe, and The lower part produces a melt stain.
(5) Auxiliary gas:
The cutting gas is mainly N₂, O₂, Air, the nitrogen cutting surface is brighter, and the oxygen cutting surface is black due to the oxidation of the material.
The higher the gas purity, the better the cut quality. The purity of cutting low carbon steel plate should be at least 99.6%, and it is recommended that the oxygen purity should be more than 99.9% when cutting carbon steel plate above 12mm. The nitrogen purity of cutting stainless steel plate should reach more than 99.6%. The higher the nitrogen purity, the better the cutting section quality. if cut
The purity of the cutting gas is unsatisfactory, which not only affects the quality of cutting, but also causes contamination of the lens.
(6) Processing materials: carbon steel, stainless steel, aluminum, copper:
Carbon steel is mainly black, and magnets can be adsorbed;
The stainless steel is mainly silver-white, and the specified color can be customized for the surface treatment according to the requirements;
The color of aluminum is similar to stainless steel silver gray, but the specific gravity is much lower than that of stainless steel, and it is very light;
Copper is mainly yellow.
Carbon steel is generally darker in luster, stainless steel is brighter, and aluminum plate is brighter.