Laser Generation and Transmission Principles
Pump Excitation: Multiple pump diodes convert electrical energy into optical energy, injecting it as an excitation source into a rare-earth-doped optical fiber medium.
Stimulated Emission Amplification: Photons undergo repeated stimulated emission within the fiber gain medium, continuously amplifying their energy to ultimately form a highly coherent, high-energy laser beam with a wavelength of approximately 1064 nm.
Flexible Transmission:The generated laser is transmitted directly to the cutting head via a flexible fiber-optic cable; this eliminates the need for complex mirror-based optical paths and results in extremely low transmission loss.
Core Material Cutting Process
Focusing and Energy Concentration: The laser beam is compressed by a focusing lens within the cutting head into an extremely small spot (less than 0.1 mm in diameter). The local energy density can reach millions of watts per square centimeter, instantly generating temperatures ranging from several thousand to over ten thousand degrees Celsius.
Material Ablation: Material in the area illuminated by the laser spot heats up rapidly. Depending on the material and process parameters, phenomena such as melting, vaporization, or even thermal shock-induced fracturing occur simultaneously, creating an initial kerf (cut).
Dross Removal and Cooling: High-pressure assist gas, injected coaxially with the laser, blows away molten waste (dross). Simultaneously, it cools the edges of the cut and protects the internal focusing lens, preventing workpiece deformation caused by overheating.
CNC Shaping:The control system drives the cutting head to move precisely along a path defined by a CAD design, continuously removing material to cut out complex 2D or 3D contours.
