Laser cutting is widely used in industrial applications, rapid, efficient, a molding, such as section smooth is its main advantage.
Laser cutting is a kind of high energy and density control good non-contact processing way.
After focusing laser beam with high energy density of light, applied in cutting has many characteristics.
And there are four main laser cutting cutting in different ways, in order to cope with different situations vaporization cutting under the high power density of laser beam heating, the material surface temperature to the boiling point temperature speed is so fast, enough to avoid melting caused by heat conduction, and part of the material vaporized into steam, part of the material as the ejecta from the bottom of the kerf width auxiliary gas flow blown away.
Some can't melt material, such as wood, carbon materials, and some plastic is cut by the vaporization cutting method.
Vaporization cutting process, the steam with you melt particle and flush debris, forming holes.
Vaporization process, about 40% of the material into steam disappeared, and 60% of the material in the form of molten drops by air flow away.
Melt cutting when the incident laser power density is more than a certain value, beam point material internal evaporated, formed holes.
Once the holes to form, which will serve as a bold absorb all of the incident beam energy.
Hole is surrounded by a wall of molten metal, and 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.
Oxidation of molten melt cutting generally use inert gas, 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.
Description is as follows: (1) the material surface under the irradiation of laser beam heats up quickly to the ignition temperature, subsequently heated combustion reaction with oxygen, emit a lot of calories.
Under the effect of the heat, the material forming inside the hole filled with steam, and holes for molten metal around the wall.
2 combustion substances into slag control of oxygen and the combustion rate of the metal and arrive at the same time, through slag, oxygen diffusion of the fast ignition front also has great influence on combustion rate.
The higher the oxygen flow rate, combustion chemistry and remove slag much sooner.
Oxygen flow rate is not, of course, the higher the better, because the velocity of reaction product that is too fast will lead to slitting the exit of metal oxide rapid cooling, but also the cutting quality.
(3) obviously, there are two sources of heat oxidation melting cutting process, the laser can reacts with metal chemical heat and oxygen.
It is estimated that when cutting steel, oxidation reaction gives off heat needed to account for cutting about 60% of the total energy.
Obviously, compared with an inert gas, using oxygen as aided gas can obtain higher cutting speed.
(4) with two heat melt oxidation in the process of cutting, if the oxygen combustion rate higher than the speed of laser beam, slotted appear wide and rough.
If the speed of moving laser beam is greater than the rate of oxygen combustion, narrow kerf width, income and smooth.
Fracture for brittle material, easy to heat damage control for high speed and controlled by a 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.
Note that the cutting is not suitable for this kind of control fracture acute Angle and the Angle of cutting edge cutting seam.
Heavy cutting closed shape is not easy to achieve success.
Control fracture cutting speed is fast, don't need too much power, otherwise it will cause the workpiece surface melting, destroy the cutting edge.
The main control parameters are laser power and spot size.
Recommendation: laser cutting equipment discount bargain offer 4007001618 【
Metal laser cutting equipment 】
It is mainly used for cutting stainless steel, carbon steel, aluminum, copper, aluminum, iron, gold, silver etc. Thickness is 1.
0 ~ 25 mm plate;
Stainless steel laser cutting equipment 】
Classic gantry double drive structure of stable and reliable, automatic switching table, at the same time of cutting up and down on another table, convenient and quick to save time;
Optical fiber laser cutting 】
With high-speed movement speed, acceleration and dynamic performance, is laser for efficient and specialized research and development of a product, its cutting 0.
The speed of 5 mm stainless steel reached 100 m/min.
Carbon steel sheet metal laser cutting 】
Specializing in sheet metal processing industry demand for sheet of processing in the field of research and development design of laser processing equipment, it has a very high cost performance, with CNC system control, efficiency is much higher than in other laser cutting equipment for the board drive mode control.
More CNC laser cutting equipment, laser cutting cutting process of laser cutting machine