Dry: a novice will understand the basic knowledge of cutting

Cutting are emitted by the device of the horizontal beam by 45 ° total reflection mirror into vertical downward beam, after lens focus, focus on the place together into a tiny spot, light irradiation on the materials, the material was quickly heated to evaporation temperature, evaporation hole formation, with the moving of the beam on the material, and comply with auxiliary gases ( With carbon dioxide, oxygen, nitrogen, etc. ) Blow away the molten slag, make continuous forming holes width is very narrow, 1 mm or so) Slitting, complete the material cutting.





the principle of cutting machine:

cutting machine is to use the focus of high power density beam artifacts, cause the irradiation materials rapidly melting, evaporation and ablation or reach the ignition point, at the same time with the aid of high-speed airflow and beam coaxial blow molten material, so as to realize the workpiece cut open. Cutting is one of the hot cutting method.



cutting classification:



1) Vaporization cutting

use of high energy density beam heating workpiece. In a short period of time vaporization to form steam. On the material form of incision. Material of the heat of vaporization are large, so the vaporization cutting need big power and power density.

vaporization cutting more used to a very thin metal materials and nonmetal materials ( Such as paper, cloth, wood, plastic and rubber, etc. ) The cutting.



2） Melt cutting

melting cutting, heat melt metal materials, non oxidizing gas nozzle injection ( Ar, He, N, etc. ) , rely on the strong pressure of the gas liquid metal, form the incision. The energy required is only about 1/10 of the vaporization cutting.

melt cutting is mainly used for materials or some not easy oxidation of active metal cutting, such as stainless steel, titanium, aluminum and its alloy, etc.



3） Oxygen cutting

it is used for preheating of heat, oxygen reactive gas, such as cutting gas. Blowing out of gas on the one hand and cut metal effect, oxidation reaction, release a large amount of heat oxidation; On the other hand the molten oxide and melt blown out from the reaction zone, and the cutting speed is more than evaporation melt cutting and cutting.

oxygen cutting is mainly used for carbon steel, titanium steel and heat treatment of steel and other easy oxidation of metal materials.



4） Scribing and control fracture

scribing is the use of high energy density on the surface of brittle material were scanned, make the material vaporized out a small slot, and then a certain pressure, brittle material will be split along the small slot. Scribing device for Q switching device commonly and CO2.

control fracture is the use of the steep temperature distribution of the produced during the groove, produce local thermal stress in the brittle material, make the material along the small slot disconnect.



cut the scope of application:

most cutting machine are made from nc program to control the operation or cutting robot. As a kind of precision cutting machining method, can cut almost all the materials, including sheet metal two-dimensional cutting or three-dimensional cutting.



in the field of automobile manufacturing, car roof window space such as curve cutting technology has been widely used. Volkswagen with power is 500 w of sheet cutting shape complex body and all kinds of curved surface parts. In the field of aerospace, with cutting machining of components for aerospace engines flame tube, titanium alloy thin wall casing, plane frame, titanium alloy skin, long wings girder, rear wing wall plate, the helicopter main rotor, the shuttle ceramic heat shield, etc.



cutting forming technology in the field of non-metallic materials also have become more widely used. Such as silicon nitride, ceramic, quartz, etc. ; Flexible material, such as cloth, paper, plastic, rubber, etc.