1. Usage: If it is used for cutting metal, the laser power is at least above 200W, or the kilowatt laser is used, generally, the imported continuous light laser will be selected. If it is used for cutting nonmetals, the laser is mainly a pulsed light laser below 50W.
2. System: Fiber lasers in XP and 2000 systems are relatively common, with little difference.
3. Optical lens: the wavelength of fiber laser or special laser cutting head can be selected.
4. Software: generally provided by laser cutting machine equipment integrators. Large companies will use their own developed software, which is well matched with hardware and has perfect functions. Small companies will choose to buy general business software. Poor accuracy. Update and customization are relatively weak.
5, important accessories: laser is the most important, more than half of the cost of the whole machine is on the laser. Followed by optical isolator, beam expander, cutting head, water cooler and so on.
Second, how to choose fiber laser?
1, laser beam quality
In order to provide the important performance of processing quality, the beam quality of fiber laser has three important indexes:
① Beam parameter product (BPP): an important index to describe the quality of laser beam. The smaller the BBP value, the smaller the convergent beam, the higher the power density, the faster the cutting speed of the thin plate and the higher the smoothness of the cutting surface. At the same time, it can cut high reflectivity materials such as copper and aluminum, and improve the production efficiency, quality and application range of cutting.
② Roundness of light spot: The roundness of light spot describes the uniformity of energy distribution of light spot in different directions. The energy distribution of light spots with high roundness is uniform in all directions, which can ensure the consistency of cutting surface smoothness and cutting speed in all directions and ensure the quality of cutting products.
③ Spot energy distribution: the spot energy distribution is circular, uniform and concentrated, or the closer to Gaussian distribution, the higher the central energy of the focused spot, and the better the symmetry of the spot. When cutting, the sharper the blade, the faster the cutting speed of the sheet, the better the smoothness of the cutting surface and the higher the consistency of the cutting seams in all directions. The spot energy distribution of IPG laser is close to Gaussian distribution.
2. Stability of laser output power
The important performance of machining quality is provided, and the stability of laser output power under different output powers in the full power range (10%- 100%) and the stability of long-term use are described.
Stability of output power in full power range: the lower the stability value, the better the stability of laser under different output power, which can ensure the consistency of cutting surface smoothness and cutting speed when cutting different thicknesses. It can improve the qualified rate of cut products and ensure the stability of cut product quality.
3. Quality control of core components
The core components determine the overall performance and quality of the laser, which is an important performance to reduce the failure rate of the equipment. The outsourcing of core components may make the overall performance and quality of the laser difficult to control, and the performance and quality of the laser cutting machine are uncontrollable. The service life of core components affects the failure rate and service life of fiber lasers. The long service life of the core components determines the low failure rate and long service life of the laser, which reduces the downtime and maintenance cost of customers.
4. Redundant hot standby design of laser module
The important performance of reducing equipment failure rate is that the redundant hot standby design of laser module can start the hot standby function when some power modules of the laser fail, and the cutting machine can continue to use normally by replacing the failed power modules with standby power, thus reducing the downtime cost caused by some power modules failure of customers.
5. Laser electronic dehumidifier
The important performance of reducing the equipment failure rate is that when the temperature of the laser cooling system and the cooled device is lower than the dew point temperature of the surrounding humid air, dew condensation will occur, which will lead to the corrosion of the device and lead to failure. The dehumidifying device can effectively reduce the humidity of the internal environment of the laser, avoid condensation due to excessive humidity, reduce the damage of condensation to the circuit board and power module, reduce the failure rate of the laser, and reduce the maintenance cost and shutdown cost of the customer laser.
6, laser cabinet protection level
The important performance of reducing the equipment failure rate is that the protection level of the laser cabinet describes the waterproof and dustproof level of the cabinet. The cabinet with high IP level can effectively prevent external dust and water from entering the cabinet, keep the interior of the laser cabinet clean and dry, avoid the laser failure caused by dust and water entering the cabinet, and reduce the maintenance cost and shutdown cost of the customer's fiber laser.
7. Electro-optical conversion efficiency (WPE)
The important performance of reducing operation cost, describing the ratio of electric input power to optical output power, high electro-optical conversion efficiency, low power consumption at a certain optical output power, low laser calorific value, reducing laser power consumption cost and water cooler required for heat dissipation.