One of the modern welding methods used in industries today is laser welding. Laser welding is one of the subsets of fusion welding, and with the development of science and technology, its use has become widespread. The first answer that can be given in response to what is laser welding is that it is hunting that is done with the help of a laser beam. In fact, laser beams create the melting and welding processes by creating the necessary heat.
Introducing laser welding
After the discovery of the phenomenon of lasers and degrees and the development of science and technology, people sought to invent more modern and efficient methods to meet their needs. Making modern devices and creating new methods in the welding industry as one of the practical industries was also of great importance. One of the most efficient developments in this industry was the invention of the laser welding method as one of the sub-branches of the fusion welding method.
This process increases the accuracy and speed during the welding process by creating heat and laser radiation. In this new method, by irradiating the surface of the desired work piece and creating heat, they create a molten pool for the joining and welding process. By using this method, different types of metals can be connected together. The laser welding process, which is performed with a variety of manual and automatic devices, has high efficiency in various industries.
The benefits of a metal laser welding machine
Welding and cutting services using laser rays are new technologies that have attracted the attention of the industry in recent decades. Laser welding or laser welding is a type of specialized welding for steel letters that is performed using a laser beam, which is a new and very precise innovation. This type of welding allows you to weld thick steel strips together without any welds. Quick and easy welding of galvanized, steel and aluminum sheets is also possible with this type of welding machine in a completely accurate and stable manner. The high energy of the laser speeds up the process of making embossed metal letters suitable for sign making. The possibility of laser spot welding can increase work efficiency between 8 and 10 times compared to other standard welding.
One of the most important advantages of using laser welding is the ability of this method to connect all kinds of metal materials at the highest speed and in the shortest possible time. Laser welding with very high millimeter accuracy creates very high-quality and perfect results in metal joints. . In this method of welding, the surface of the part remains flat and without porosity and drying in the connection area.
By choosing the new laser welding method, there is no need to use high currents for welding operations. In this method, the welding operation is performed using electronless welding technology. This causes an 80% reduction in the electrical consumption of laser welding compared to traditional welding.
Laser welding machines with advanced technology, the ability to weld a wide range of materials such as different alloys with very high melting points, non-homogeneous materials and metal materials.
Electronic parts have many uses.Also, one of the other important advantages of using laser welding instead of industrial welding is that it does not produce any X-rays. This action significantly reduces environmental pollution. Laser welding is cleaner than other industrial welding methods, and therefore does not require polishing operations after welding. One of the significant advantages. In laser welding, the lifetime of the joints in this method is high compared to traditional arc and argon welding.
The lifetime of the laser welding machine in mass and high production is very high and significant compared to traditional welding. Laser welding machines work without any contact. This causes the device to not wear out.
In laser welding devices, there is no need to change the tools or electrodes used in the device system. In terms of reducing industrial waste, this is one of the advantages of using these devices.
Tehran Laser Welding
Laser welding, or in other words, laser welding services, is the most accurate welding method available today and guarantees minimal heat transfer. This method allows the assembly of small parts less than 1 mm and microwires, different materials without deformation or risk of damage to the parts. This type of welding produces very precise components because the beam is usually focused on a small area. The process also produces strong, durable welds that withstand harsh environments and extreme temperatures. In fact, laser beams have a narrow welding profile that allows you to weld even the thinnest workpieces without damaging them. In addition, laser welding systems prevent material wastage and welding errors while guaranteeing constant quality in all work pieces. In general, it can be said; The work pieces that are welded together using lasers are spot-free and accurate and do not require post-processing processes such as grinding. It is very simple to apply the considerations for precise laser nanowelding, which causes an excellent result in the product.
Types of laser welding
Solid and continuous line laser welding
The linear laser welding method is the most standard mode in CW laser welding. In this method of welding, the highest pressure and lowest welding depth will be at the beginning and end of the welding line. This method of laser welding is also known as the water seal and air seal method.
Cook laser welding
In this method of laser welding, less heat enters the piece than linear welding. . In the laser seam welding method, the welding depth at the beginning and end of each seam will be less than the middle area of the seam. The welding point has the standard of pulsed lasers. Pulse technology in the welding process significantly reduces the amount of heat input to the workpiece. In this method, the workpiece gets a chance to cool by being placed between each pulse. Also, one of the advantages of using the laser welding method of the line consisting of the welding point is to create resistance against the penetration of air and water to the joint. Of course, you should note that this resistance depends on the overlap of the points. The use of spot welding method is very efficient in electronic industries that require high precision and precision in welding. Azad is done using remote welding methods. In this process, the form of welding is optimized and performed depending on the type of material of the part and the degree of heat tolerance of the part.
Types of laser welding based on the procedure
Butt laser welding
The butt welding method is such that two parts are placed together and the laser welding process is performed linearly. Of course, in this method, T-shaped welding can also be done. This method is very efficient and it is used to increase the strength of connection and welding. In laser welding, it is necessary to be very precise when working.
90 degree laser welding
90 degree laser welding or the same corner is another type of laser welding that the part The works are placed at 90 degrees or at an angle, and then the welding process is done. This welding method also has high resistance. In this method, the thickness of the upper sheet or work piece is important and it should not be too thick.
Laser welding on top of each other
Laser welding on top of each other is one of the most common and widely used. Laser welding methods are very simple in this case, and as it is clear from the name of this method, in this case, the work pieces are placed on top of each other and the connection process is done by laser welding. be.
Fiber welding
Fiber welding is a welding method using fiber laser. Fiber laser has various other uses, which are mentioned below, but one of the most common uses of fiber laser is for welding. In this method, fiber laser energy is used for welding and connecting metal parts. In this process, a high-power laser beam is irradiated to the metal surface, and its energy melts and connects the parts.
Fiber welding applications
Automotive industry
Aerospace and aviation industry
Electronics production
Energy industry
Marine industry
Fiber laser is used in fiber welding. This laser uses optical fiber as a means of energy transfer. These fibers are usually made of silica glass and combined with rare earth materials such as erbium, ytterbium or neodymium. Fiber laser with high power and the ability to pay attention to distance differences, due to its high efficiency and focused light, is used in various cases.