The working principle of laser cutting is to guide high power laser output, most commonly through optical devices. Laser optics and computer numerical control are used to guide materials or generated laser beams. Typically, this process uses a motion control system to follow the pattern that the CNC or G code is to cut into the material. The focused laser beam aims at the material, and then melts, burns, evaporates, or is blown away by the gas, leaving an edge with high quality surface finish.
At present, as a new type of tool, laser cutting machine is more and more mature in various industries. The working principle of the laser cutting machine itself is to focus the laser emitted from the laser into a high power density laser beam through the optical path system. The laser beam shines on the surface of the workpiece to make the workpiece reach the melting point or boiling point, while the high-pressure gas coaxial with the beam will blow away the molten or vaporized metal. With the movement of the relative position of the beam and the workpiece, the material will eventually form a slit, so as to achieve the purpose of cutting. This is also the most basic working principle of the laser cutting machine.
Its own characteristics, to put it simply, are that the laser cutting process replaces the traditional mechanical knife with an invisible beam, which has the characteristics of high precision, fast cutting, not limited to cutting pattern restrictions, automatic typesetting saves materials, smooth incision, low processing cost, etc., and will gradually improve or replace the traditional metal cutting process equipment. The mechanical part of the laser cutter head has no contact with the work and will not scratch the working surface during the work; The laser cutting speed is fast, the incision is smooth and flat, and there is generally no need for subsequent processing; The cutting heat affected zone is small, the plate deformation is small, and the cutting seam is narrow; The notch is free of mechanical stress and shearing burr; High machining accuracy, good repeatability, and no damage to the material surface; NC programming, can process any plan, can cut the whole board with large format, no need to open a mold, economical and time-saving. As a new type of tool, laser equipment is more and more mature and applied to various industries, including laser cutting machine, laser engraving machine, laser marking machine, laser welding machine, etc.
Generally speaking, laser cutting quality can be measured by the following six standards: 1. Cutting surface roughness. 2. Size of slag hanging on the incision. 3. Trimming perpendicularity and slope. 4. Corner size of cutting edge. 5. Stripe drag. 6. Flatness. The energy of the laser is concentrated into a high-density beam in the form of light. The beam is transmitted to the working surface, generating enough heat to melt the material. In addition, the high-pressure gas coaxial with the beam directly removes the molten metal, so as to achieve the purpose of cutting. This shows that laser cutting processing is essentially different from machine tool machining. It uses the laser beam emitted from the laser generator to focus into a high power density laser beam irradiation condition through the optical path system. The laser heat is absorbed by the workpiece material, and the workpiece temperature rises sharply. After reaching the boiling point, the material begins to vaporize and form holes. With the high pressure air flow, the material finally forms a slit with the movement of the beam and the workpiece relative position. The process parameters (cutting speed, laser power, gas pressure, etc.) and movement track during slitting are controlled by the CNC system, and the slag at the slitting is blown off by the auxiliary gas under a certain pressure.
Standard process of using fee of XT laser cutting machine:
1. Follow the safety operation regulations of XT laser cutting machine. Start the laser, adjust the light and test the machine in strict accordance with the laser startup procedure.
2. Operators must be trained, familiar with cutting software, equipment structure and performance, and master relevant knowledge of the operating system.
3. Wear labor protection appliances as required, and wear protective glasses that meet the requirements near the laser beam.
4. Do not process materials without knowing whether they can be irradiated or cut by laser, so as to avoid the potential danger of smoke and steam.
5. When the equipment is started, the operator shall not leave the post without authorization or entrust a special person to take charge. When it is really necessary to leave, the operator shall stop or cut off the power switch.
6. Put the fire extinguisher in an easily accessible place; Close the laser or shutter when not working; Do not place paper, cloth or other flammable objects near the unprotected laser beam.
7. In case of any abnormality during the processing, stop the machine immediately, eliminate the fault or report to the supervisor.
8. Keep the laser, laser head, bed and surrounding areas clean, orderly and free of oil contamination, and stack workpieces, plates and waste materials as required.
9. When using gas cylinders, avoid crushing welding wires to avoid leakage accidents. The use and transportation of gas cylinders shall comply with the regulations on gas cylinder supervision. Do not expose cylinders to direct sunlight or near heat sources. When opening the bottle valve, the operator must stand at the side of the bottle mouth.
10. Observe high voltage safety regulations during maintenance. Follow regulations and procedures for operation or maintenance every day of the week, every hour of operation or every six months.
11. After startup, manually start the machine tool at low speed in the X, Y, Z axis direction, and check whether there is any abnormality.
12. After entering the new workpiece program, test it first and check its operation.
13. Observe the operation of the machine tool during operation to avoid accidents caused by the cutting machine exceeding the effective travel range or the collision between the two machines.
14. The automatic operation of the equipment is dangerous to some extent, and it is not allowed to enter the safety fence. Pay attention to safety in any operation. Entering the operating range of the machine at any time can cause serious injury.
15. During feeding, the feeding state must be observed to prevent the material from arching and hitting the laser head, causing serious consequences.
16. Before production, check whether all preparations are in place, whether the protective gas is turned on, and whether the air pressure reaches. Whether the laser is in standby mode. Whether the feeding and robot are in automatic state.
XT Laser always takes customers as the center, and constantly promotes the construction of laser industry service functional area and service platform. While improving product performance, we will continue to improve user experience and improve user services.
Time change is a touchstone. Today's market has carried out an "open book examination" for each enterprise, which is intended to test the details and quality of the enterprise, especially in the unstable stage, to make a direct and fundamental test on the stage description, decomposition steps, organizational support and operation control of the enterprise's strategic objectives. Strategic planning is the choice, and focusing on implementation is the key. The market will always give the most generous returns to the strong people who actively respond, just as XT Laser constantly strengthens itself, breaks the cocoon of adversity, stretches its wings and soars in XT.
