Laser cutting heads
Definition
Introduction to laser cutting heads
Laser cutting heads are essential components in laser cutting machines, responsible for directing and controlling the laser beam to make precise cuts in various materials. These devices integrate optical and mechanical systems that allow the laser beam to be focused and auxiliary gases to be applied to optimize the quality of the cut.
This element is essential for the success of laser cutting processes in industrial sectors such as metallurgy, parts manufacturing, the automotive industry and electronics, due to its ability to offer clean, precise cuts at high speed.
Operating principles
Generation and direction of the laser beam
The laser cutting head receives the beam generated by the laser source and directs it towards the work point. To do this, it uses a set of lenses and mirrors that focus the beam on an extremely small point, increasing the power density and allowing the fusion or vaporization of the material to be cut.
The optical system of the head must maintain the quality of the beam, avoiding losses due to dispersion or optical aberrations, which is achieved through a precise design of its components and materials resistant to laser radiation.
Use of auxiliary gases
The head also incorporates a supply system for auxiliary gases, such as oxygen, nitrogen or compressed air, which are expelled around the cutting point. These gases have specific functions: oxygen facilitates the combustion of the material, increasing the cutting speed; Nitrogen prevents oxidation and improves edge quality; and compressed air helps expel debris.
The pressure, type and flow of gas are carefully regulated in the head to optimize the efficiency and quality of the cut depending on the material and thickness.