Laser cutting machine process model

Laser cutting machine process model: a, vaporization cutting pattern under the high power density of laser beam heating, the speed of the material surface temperature to the boiling point temperature fast, enough to avoid melting caused by heat conduction, so part of the material vaporized disappear into steam, part of the material as the ejecta from the bottom of the kerf width auxiliary gas flow blown away. Second, melt cutting model when the incident laser power density is more than a certain value, material inside the beam spot on evaporated, formed holes. Once the holes to form, which will serve as a bold absorb all of the incident beam energy. Hole surrounded by a molten metal wall, then, and beam coaxial auxiliary air holes around the molten material. With workpiece moving, the hole by the synchronous transverse cutting direction to form a cut seam. To continue along the seam at the forefront of laser beam irradiation, continuous or pulse melting materials from being blown away from the seam. Three, oxidation melting cutting generally use inert gas fusion cutting mode, if replaced with oxygen or other reactive gas, was lit materials under the irradiation of laser beam, and the chemical reaction of oxygen violent and produce another source of heat, called oxidation melting cutting. Four fracture cutting mode, control for easy heat damage of brittle materials, high speed, controlled by laser beam heating cutting, called control fracture cutting. The cutting process is the main content: laser beam heating brittle material is small area, causing the area of thermal gradient and severe mechanical deformation, cracks leads to the formation of a material. Laser beam may guide so long as you keep balanced heating gradient cracks in any direction.