Improvement of the laser of the manufacturer of the automatic fiber laser cutting machine

Fully automatic fiber laser cutting machine manufacturers do not need a huge refrigeration system, and have the advantages of high conversion efficiency, low threshold, good beam quality and narrow line width. In addition, there is no optical lens in the resonant cavity of the fiber laser, which has the advantages of adjustment-free, maintenance-free, and high stability: the ultra-fiber laser uses fiber as the waveguide medium. The coupling efficiency is high, high power density is easy to form, and the heat dissipation effect is long and long work. Life and maintenance-free time, the average maintenance-free time is more than 100,000 hours. Fiber lasers can achieve laser output in the range of 380mm-900mm by doping with different rare earth ions, and wavelength selection and tunability can be achieved by adjusting the fiber grating resonant cavity. Compared with traditional solid-state lasers, fiber lasers are small in size, long-lasting, and easy to dry system integration. They can operate normally in harsh environments with high temperature, high pressure, high vibration, and high impact, and their output spectrum has higher tunability and Selective. Since there is no optical lens in the resonant cavity of the fiber laser, the cavity mirror of the resonant cavity can be directly fabricated on the cross-section of the optical fiber, or the resonant cavity can be formed by a fiber coupler. It has the advantages of adjustment-free, maintenance-free, and high stability, which is unmatched by traditional lasers; tolerance: good compatibility; capable of any harsh working environment, that is, it has high dust, oscillation, impact, humidity and temperature For example, cut carbon steel with a 5r lens, and the focal depth is within +2% of the focal length, that is, about 5mm.

Therefore, it is very important for manufacturers of automatic fiber laser cutting machines to control the position of the focus relative to the surface of the material to be cut. Taking into account factors such as cutting quality and cutting speed, in principle, 6mm metal materials, the focus is on the surface; 6mm carbon steel, the focus is above the surface: 6mm stainless steel, the focus is below the surface. The specific size is determined by experiment. There are three simple methods to determine the focal position in industrial production: printing method: move the cutting head from top to bottom, and print laser beams on a plastic plate, and print diameter inclined plate method: use plastic placed diagonally at an angle to the vertical axis Pull the plate horizontally to find the blue spark of the laser beam. Method: remove the nozzle, blow the chamber, and hit the pulse laser on the stainless steel plate, so that the cutting head can cut the proximal and distal ends due to the beam divergence angle of the cutting machine on the flying light path. The length of time is different, collimator.