Galvo Laser Welding Applications
The Description of Laser Welding
Laser welding uses high-energy laser pulses to locally heat the material in a small area. The energy of laser radiation is guided to the internal diffusion of the material through heat transfer, and the material is melted to form a specific molten pool
Laser welding is a new type of welding method, which mainly aims at laser welding thin sheet metal and precision parts. It can realize spot welding, overlap welding, seal welding, etc.
It has a high depth width ratio, small weld width, small heat-affected zone, small deformation, fast welding speed, flat and beautiful weld, no treatment or simple treatment after welding, high weld quality, no pores, and can be accurately controlled, Small focusing light spot, high positioning accuracy and easy to realize automation.
The Advantages of Laser Welding
1. High precision: the light spot can reach micron level, the processing time can be controlled by program, and the precision is much higher than that of traditional soldering process;
2. Non-tin contact processing: the soldering process can be completed without direct tin contact on the surface, and there is no stress caused by tin contact soldering;
3. Micro welding can be carried out. After focusing, the laser beam can obtain a very small spot and can be positioned accurately. It can be applied to the assembly and welding of micro and small workpieces produced in large quantities
4. Small working area: local heating, small heat affected area.
5. Work process safety: there is no electrostatic threat during processing.
6. The working process is clean and economical: laser processing consumes goods, and there is no waste in the processing process;
7. Simple operation and maintenance: laser soldering is easy to operate and the maintenance of laser head is convenient;
8. life: long life and stable performance.
9. It can weld inaccessible parts, and implement non-contact long-distance welding, which has great flexibility
The Feature of Laser Welding
Laser welding is one of the important aspects of the application of laser material processing technology. The welding process belongs to heat conduction type, that is, the laser radiation heats the workpiece surface, the surface heat is guided to the internal diffusion through heat transfer, and the workpiece is melted to form a specific molten pool by controlling the parameters such as laser pulse width, energy, peak power, and repetition frequency. Because of its unique advantages, it has been successfully applied to the precision welding of micro and small parts. The emergence of high-power CO2 and high-power YAG lasers has opened up a new field of laser welding. Deep penetration welding based on the keyhole effect has been widely used in machinery, automobile, steel, and other industrial fields.
The Applications of Laser Welding
Laser Welding Application in Powder Metallurgy
Due to the special properties and manufacturing advantages of powder metallurgy materials, they are replacing the traditional metallurgical materials in some fields, such as automobile, aircraft, tool, and cutting tool manufacturing. With the increasing development of powder metallurgy materials, the connection between powder metallurgy materials and other parts is becoming more and more prominent, which limits the application of powder metallurgy materials.
Laser welding has entered the field of powder metallurgy material processing with its unique advantages, which opens up a new prospect for the application of powder metallurgy materials. The use of laser welding can improve the welding strength and high-temperature resistance.
Laser Welding Application in Electronic Industry
Laser welding has been widely used in the electronic industry, especially in the microelectronics industry. Due to the small heat-affected zone, rapid heating concentration, and low thermal stress, laser welding shows unique advantages in the packaging of integrated circuits and semiconductor device shells.
Laser welding has also been used in the development of vacuum devices, such as molybdenum focusing electrodes, stainless steel support rings, fast heating cathode filament assembly, and so on.
The thickness of the elastic thin-wall corrugated sheet in the sensor or temperature controller is 0.05-0.1mm, which is difficult to solve by traditional welding methods. Laser welding is adopted because TIG welding is easy to penetrate, plasma stability is poor and there are many influencing factors.
Laser Welding Application in Manufacturing
Laser tailor welded technology has been widely used in foreign car manufacturing and continues to grow at a high speed.
In the research of ultra-thin plate welding, such as foil with plate thickness less than 100 microns, fusion welding cannot be carried out, but YAG laser welding with special output power waveform is successful, which shows the broad prospect of laser welding.
Laser Welding Application in the Biomedical Field
At present, the research on laser welding nerves at home and abroad mainly focuses on laser wavelength, dose, function recovery, and the selection of laser solder
Compared with the traditional suture method, laser welding has the advantages of fast anastomosis speed, no foreign body reaction in the healing process, maintaining the mechanical properties of the welding site, and the repaired tissue grows according to its original biomechanical properties. Therefore, laser welding will be more widely used in biomedicine in the future.
Laser Welding Application in the Automotive Industry
Nowadays, the laser welding production line has appeared in the automobile manufacturing industry on a large scale and has become one of the outstanding achievements of the automobile manufacturing industry.
As early as the 1980s, many automobile manufacturers took the lead in using laser welding for sheet metal weldings such as roof, body, and side frame