Advantages of Laser Welding Compared to General Welding
Advantages of Laser Welding Compared to General Welding, Laser Welding Machine is a machine used in the field of welding, used in welding for a short period of time, but the development has been quite rapid, is one of the important aspects of the application of laser material processing technology. The following share the advantages of laser welding compared with general welding.
Advantages of laser welding compared to general welding1
Laser welding compared to other welding technologies, the main advantages of laser welding are:
1, fast speed, depth, deformation is small.
2, can be welded at room temperature or under special conditions, welding equipment device is simple. For example, the laser through the electromagnetic field, the beam will not be offset; laser in a vacuum, air and some kind of gas environment can be welded, and can be welded through the glass or transparent to the beam material.
3, can weld refractory materials such as titanium, quartz, etc., and can be welded to heterogeneous materials, the effect is good.
4, laser focus, high power density, in the high-power device welding, the depth to width ratio of up to 5:1, up to 10:1.
5, can be micro-welding. Laser beam after focusing can be obtained after a very small spot, and can be accurately positioned, can be applied to high-volume automated production of micro, small workpiece group welding. (The smallest spot can be up to 0, 1mm)
6, can be welded difficult to access the parts, the implementation of non-contact long-distance welding, has a great. Flexibility. Especially in recent years, the YAG laser processing technology in the use of fiber optic transmission technology, and the popularity of fiber continuous laser laser laser welding technology has been more widely promoted and applied, more convenient for automation integration.
7, the laser beam is easy to realize the beam according to time and space, can be divided into light, can carry out multi-beam simultaneous processing and multi-station processing, for more precise welding provides the conditions.
However, laser welding also has certain limitations:
1, the requirements of the weldment assembly precision, and the requirements of the beam in the position of the workpiece can not have a significant offset. This is because the laser focus after the spot size is small, narrow weld, for plus filler metal materials. If the workpiece assembly precision or beam positioning accuracy does not meet the requirements, it is easy to cause welding defects.
2, the laser and its related systems cost more, a larger one-time investment.
Laser welding principle:
Laser welding is a high-intensity laser beam radiation to the metal surface, through the interaction between the laser and the metal, so that the metal melts to form a weld.
In the process of laser-metal interaction, metal melting is only one of the physical phenomena. The physical energy is not primarily converted into metal melting, but manifests itself in other forms, such as vaporization, plasma formation, etc.
However, the laser is not the only one that can be used to create a weld.
However, to achieve a good melt welding, the metal melting must be the main form of energy conversion.
To this end, it is necessary to understand the interaction of laser and metal in the production
produced by a variety of physical phenomena as well as these physical phenomena and the relationship between the laser parameters, and thus through the control of laser parameters, so that the laser energy is converted into a large part of the energy of the metal melting, to achieve the purpose of welding.
Laser welding and general welding compared to the advantages of 2
1, high flexibility
Laser welding technology is currently the most advanced welding in the field of processing, compared with the traditional welding technology, laser welding technology belongs to the non-contact welding, the operating process does not require pressure, welding speed, high efficacy, depth hit, residual stress and deformation of small The laser welding technology is non-contact welding, compared with the traditional welding technology. The anisotropic material welding, the effect is good, with great flexibility.
2, can weld difficult to weld materials
Laser welding is the use of very high energy density of the laser beam fusion material, laser welding machine has a fast welding speed, high strength, narrow weld, heat affected zone is small, and small deformation of the workpiece, the subsequent processing of the workload is small.
3, less labor costs
As in the laser welding is very low heat input, welding deformation is very small, and can achieve the surface is very beautiful welding effect, so the laser welding follow-up treatment is very little, you can greatly cut down or cancel the huge polishing and smoothing process on the labor.
The advantages of laser welding compared to general welding3
1, good laser beam quality
After the laser focus, high power density. After the high-power low-order mode laser focus, the focal spot diameter is small.
2, laser welding speed, depth, small deformation.
Due to the high power density, small holes are formed in the metal material during the laser welding process, and the laser energy is transferred to the deeper part of the workpiece through the small holes, with less lateral diffusion. Therefore, the laser beam scanning process of material fusion depth is greater. Fast speed, large welding area per unit time.
3, laser welding is particularly suitable for welding precision sensitive parts
As the laser welding machine welding aspect ratio is large, the specific energy is small, the heat-affected zone is small, the welding deformation is small, particularly suitable for welding precision and heat-sensitive parts, can be eliminated post-weld correction and secondary processing.
4, laser welding machine flexibility
Laser welding machine can realize any angle welding, can be welded difficult to access the parts; can be welded a variety of complex welded workpiece and the shape of the large irregular workpiece. Realize any angle welding has great flexibility.
5, laser welding can weld difficult to weld materials
Laser welding can be used not only for welding between a variety of heterogeneous metal materials, but also for titanium, nickel, zinc, copper, aluminum, chromium, niobium, gold, silver and other metals and their alloys, steel, and lumbering alloys. Welding between alloy materials.
6, laser welding machine low labor costs
As the laser welding heat input is extremely low, the post-weld deformation is very small, you can achieve the surface is very beautiful welding effect, so there is very little follow-up processing of the laser welding, you can greatly reduce or eliminate the labor on the huge polishing and leveling process.
7, laser welding machine operation is simple
Laser welding machine welding equipment is simple, easy to learn the operation process, easy to start. The professionalism of the staff does not require high, saving labor costs.
8, laser welding machine safety
High-safety welding nozzle only in contact with the metal before touching the switch to be effective, and touch the switch with body temperature sensing.
Specialized laser generators have safety precautions for operation, and laser generator protective eyewear is required for operation to minimize eye damage.
9, laser welding machine for a variety of working environments
The laser welding machine can be used in a variety of complex working environments, can be at room temperature or special conditions for welding. For example, laser welding is similar to electron beam welding in many ways. Its welding quality is slightly inferior to electron beam welding, but the electron beam can only be transmitted in a vacuum, so welding can only be carried out in a vacuum, while laser welding technology can be more advanced. Used in a wide range of work environments.
10, the welding system is highly flexible and easy to automate.
However, laser welders also have certain limitations. Due to the high cost of laser vacation related systems, the one-time investment cost will be higher. In addition, the laser welding machine also requires a high degree of precision in the installation of the weldment, requiring that the position of the light source in the commodity workpiece can not have a significant deviation.
As can be seen, the top ten advantages of laser welding machine is much better than traditional welding methods. In the future, the application of laser welding technology will not be limited to the current electronics, automotive, instrumentation and other fields. It will also be more widely used in the military and medical fields, especially in the medical field. It has a broad prospect.