1. Electron beam welding technology
The main working principle of the electron beam welding technology is to focus the high-speed electron flow in a vacuum environment and then align the workpiece with the seam. At this time, the kinetic energy of the electron beam is converted into heat energy to fuse the metal parts. This is also a high-energy beam processing technology. An important part of it. The main advantages of electron beam welding are higher energy density, larger aspect ratio of welding, smaller welding deformation, higher control accuracy, stable welding quality and easier realization, and the advantages of automatic control are also obvious.
Main application areas
In the aerospace manufacturing industry, the application of electron beam welding technology will greatly improve the manufacturing level of aircraft engines, effectively welding some weight-reducing designs and dissimilar materials in the engine, and at the same time for some parts that cannot be processed as a whole Manufacturing provides a way of processing to improve the quality of processing.
2. Laser welding technology
The main working principle of laser welding technology is to use a polarizer to reflect the laser light to generate a beam, which is concentrated and focused in the device to produce a larger energy beam. If the focus gradually approaches the workpiece, the workpiece will instantly melt and evaporate. This method will be used in the welding process. The welding equipment of laser welding is relatively simple, and the energy density is relatively high, the deformation is small, the welding accuracy is relatively high, and the aspect ratio of the weld is also relatively large, which will be at room temperature and some special conditions Welding has obvious advantages for welding some refractory materials.
Main application areas
Laser welding is mainly applied to the splicing of large aircraft skins and the assembly of fuselage accessories.
3. Friction stir welding technology
Friction stir welding technology is a new technology, which mainly uses a non-consumable stirring head to rotate it at high speed and then press it into the section to be welded, so that the surface of the welded metal will produce thermoplasticity during constant friction and heating. At the same time, under the action of pressure, thrust and squeezing force, the materials are effectively diffused and joined, which will form a denser solid-phase connection between metals. At the same time, it does not need to be protected by gas. Some materials to be welded are less damaged, and the heat-affected zone of the weld is also small, and the strength of the weld is relatively high. This technology has great advantages, so it is hailed as the most revolutionary welding technology in the contemporary era.
Main application areas
Friction stir welding technology has been widely used in the assembly of aircraft skins and wings, as well as aircraft floors and other structural parts.
4. Linear friction welding technology
Linear friction welding mainly uses the relatively linear reciprocating friction movement of the welded workpiece under the action of welding pressure to generate heat, and finally realize the solid connection of welding. Under the action of welding pressure, one of the weldments will reciprocate linearly with a certain amplitude and frequency to the other weldment along a straight line, which will heat the surface of the part to be welded by means of frictional heat. When the friction surface reaches a viscoplastic state, the friction movement must be stopped quickly, and then the upsetting force is applied to it to fully complete the welding. This method has great advantages, high work efficiency, and obvious quality advantages, and has high energy-saving value.
Main application areas
Linear friction welding is mainly used in the manufacture of integral titanium alloy blisks of engines.