Laser cutting thick plate debugging methods and skills
2021-07-05
Laser cutting thick plate debugging methods and skills, today, most of the stainless steel thick plate is laser cutting, but to cut high-quality thick plate stainless steel, we need to master certain skills. Stainless steel plates are a ten-minute material in many areas. Products made of stainless steel, excellent performance, long service life. Widely used in machinery manufacturing, construction engineering, kitchenware manufacturing, rail vehicles and other industries. 1. The choice of nozzle, the diameter of nozzle determines the shape of air flow, the area of gas diffusion and the velocity of gas entering the incision, which affects the removal of molten material and the stability of cutting. The higher the velocity is, the faster the velocity is, and the stronger the ability of the jet to remove the molten material is when the workpiece is in the proper position in the airflow. The thicker the stainless steel, the higher the nozzle should be used, the higher the pressure setting, and the pressure and flow rate should meet the requirements of cutting the normal cross-section effect (Note: At a fixed flow rate, different nozzle size, monitor air pressure) the thicker the stainless steel, the bigger the nozzle should be used, the larger the proportional valve is, the higher the flow rate is, and the higher the pressure and the effect of cutting off the normal section can be guaranteed. At the same time, in order to ensure the cutting effect, protect the nozzle from damage. Coaxial testing is required before cutting to ensure that the nozzle is in line with the laser output beam. Test method: Paste transparent tape on the end face of the nozzle outlet, adjust the laser output power, observe whether there is a center hole and the position of the center hole on the transparent tape paper, and adjust the adjusting Screw on the mirror cavity Handle synchronously, the holes made by the laser on the cellophane tape are coincident with the center of the nozzle. 2, frequency debugging, frequency change on stainless steel thick plate cutting effect: Frequency from 500-200 Hz down, cutting section effect fine, layer number improvement slow. When the frequency is set to 100Hz, can not be cut off, anti-blue light. The optimum frequency range can be found by changing the frequency. In order to guarantee the best cutting section, the pulse number and the single pulse energy must match exactly. 3. Load cycle debugging, duty cycle on stainless steel thick plate cutting effect: Duty Cycle for critical value of 53% , duty cycle continues to reduce. The lower surface without cutting through mark, duty ratio increased to 60% , cross-section became rough, layered, cutting surface was yellow. 4, Focus Selection, focus on different, cutting thickness, material and quality are also different. Cutting different materials and thicknesses requires adjusting the focus. Before cutting, the actual zero focus can be measured to determine the most suitable cutting focus more quickly by referring to Chuangxin's cutting process parameters. Note: The above is the method of parameter adjustment. The specific value should be determined according to different power laser and different thickness plate.
