Views: 12 Author: Leapion Publish Time: 07-20-2022 Origin: https://www.leapion.com/
The laser cutting process replaces the traditional knife with the invisible laser beam, with the characteristics of high precision, fast cutting, not limited to the cutting pattern, auto-typesetting saves materials, smooth cut, low processing cost and etc., it will gradually improve or replace the traditional metal cutting machine. So what is the principle of a laser cutting machine?
During the cutting process of the laser cutting machine, the laser beam is focused into a small focus through the lens of the cutting head, making the focus a high power density, and the cutting head is fixed on the z-axis. At this time, the heat input by the laser beam far exceeds the part of the heat reflected, conducted, or diffused by the materials, the materials are quickly heated to the melting and vaporized temperature, and at the same time, a high-speed airflow blows out the melted and vaporized materials from the coaxial or non-coaxial side, forming holes for materials cutting. With the relative movement between the focus and materials, the holes form a continuous slit with a very narrow width to complete the cutting of the materials.
Laser cutting is realized by using high power density energy produced by laser focusing. Under the control of the computer, the laser source is discharged by pulses, so that it can outputs controlled repetitive high-frequency pulse laser and form a beam with a certain frequency and pulse width, the pulse laser beam is transmitted and reflected through the laser path and focused on the surface of the processed materials through the focusing lens group to form one by one slasher, high-energy density spots, the focal spot is located near the machined surface waiting to be processed to melt or vaporize the processed materials instantly at a high temperature. Every high-energy laser pulse can sputter a small hole, under the control of the computer, the laser processing head and the processed materials conduct continuous relative movement according to the pre-draw figure so that it will process the object into the desired shape. The fiber laser source uses a solid-state diode to pump the molecules in the double-clad ytterbium-doped fiber, the stimulated laser passes through the fiber core many times, then the fiber laser source forms a laser to output to the cutting focal head through the transmission fiber. Because of all the collisions between the molecules occurring in the fiber, no laser gas is required, so the energy we need is greatly reduced---about one-third of that of the CO2 laser source. Because less heat is produced, the volum of the cooler is smaller. In short, with the same performance, the overall energy consumption of the fiber laser source is 70% lower than that of the CO2 laser source.
That's the principle of the laser cutting machine, know more information about laser cutting machines.
