Laser cutting is the use of high energy density laser beam heating the workpiece, so that the temperature rises rapidly, in a very short time to reach the boiling point of the material, the material begins to vaporize, the formation of vapor. These vapors are ejected at a high speed, and a cut is formed in the material while the vapor is ejected.
With the constant development of the immediate tank industry, more and more industries and companies have applied laser cutting to tanks, and more and more companies have entered the tank industry. However, due to the reduction in the cost of subsequent processing, It is still feasible to use this equipment in large-scale production.
Laser cutting can be divided into four categories: laser vaporization cutting, laser melting cutting, laser oxygen cutting, laser scribing, and controlled fracture.
Laser vaporization cutting uses a high-energy-density laser beam to heat the workpiece so that the temperature rises rapidly, reaches the boiling point of the material in a very short time, and the material begins to vaporize and form vapor. These vapors are ejected at a high speed, and a cut is formed in the material while the vapor is ejected. The heat of vaporization of materials is generally very large, so astronomy laser pointer vaporization cuts require a great deal of power and power density. Laser vaporization cutting is mostly used for the cutting of extremely thin metal materials and non-metal materials (such as paper, cloth, wood, plastics, rubber, etc.).
Laser melting cutting, laser heating to melt the metal material, and then through the coaxial nozzle with the beam blowing non-oxidizing gas (Ar, He, N, etc.), relying on the gas pressure to discharge the liquid metal, the formation of incisions. Laser fusion cutting does not require complete vaporization of the metal. The energy required is only 1/10 of the vaporization cut. Laser melting and cutting is mainly used for the cutting of some non-oxidizable materials or active metals, such as stainless steel, titanium, aluminum and its alloys.
Laser oxygen cutting, laser oxygen cutting principle is similar to oxyacetylene cutting. It uses a laser as a preheating heat source and uses reactive gases such as oxygen as the cutting gas. The injected gas reacts with the cutting metal on the one hand and undergoes an oxidation reaction, releasing a large amount of oxidation heat. On the other hand, the molten oxide and melt are blown out of the reaction zone to form cuts in the metal. Since the oxidation reaction during the cutting process generates a large amount of heat, the energy required for laser oxygen cutting is only 1/2 of the melt cutting, and the cutting speed is far greater than the laser vaporization cutting and melting cutting. Laser oxygen cutting is mainly used for carbon steel, titanium steel and heat-treated steel and other easily oxidized metal materials.
The laser scribing and control breaks, the laser scribing uses the high energy density laser to scan on the brittle material surface, causes the material to evaporate out a small trough by the heat, then applies the certain pressure, the brittle material will split along the small trough . Lasers for laser scribing are generally Q-switched lasers and CO2 lasers. Controlling the fracture is a steep temperature distribution created by the use of a laser groove, creating localized thermal stresses in the brittle material and breaking the material along the groove.
The laser particle size analysis method is a rapid development of a test method in recent years, its main features are:
The wide range of particle sizes that can be measured enables such a wide range of particle size distributions from nanometers to micrometers. About :20nm ~ 2000μm, in some cases the upper limit up to 3500μm;
Wide range of applications, not only to measure solid particles, but also to measure the particles in the liquid;
Reproducibility is good, compared with the traditional method, laser particle size analyzer can give accurate and reliable measurement results;
The measurement time is fast, the entire measurement process can be 1-2 minutes, some instruments have realized real-time detection and real-time display, allowing the user to observe and monitor the sample during the entire measurement process.
Laser particle size analysis has broad application prospects not only in advanced materials engineering, defense industry, military science, but also in many traditional industries. In particular, research and development of high-tech materials science, product quality control, such as: ceramics, powder metallurgy, rare earth, batteries, pharmaceuticals, food, beverages, cement, coatings, adhesives, pigments, plastics, health care and cosmetics. Since the specific energy of the particle particle lies in its very small particle size, the particle size is an important parameter to characterize the particle performance. Therefore, measuring the particle diameter is an important indicator for conducting material detection and evaluating the particle material.