Laser welding is widely used in this society, to a great extent to help enterprises or individuals to improve the efficiency,
Laser welding and other welding technology, compared with the main advantages of laser welding are:
1, fast speed, depth, deformation is small.
2, can be welded at room temperature or special conditions, welding equipment device is simple.
3, can weld refractory materials such as titanium, quartz, etc., and can weld dissimilar materials with good results.
4, laser focusing, high power density, in the high-power device welding, depth to width ratio of up to 5:1, up to 10:1.
5, can be micro-welding. Laser beam after focusing to obtain 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 inaccessible parts, the implementation of non-contact long-distance welding, has great flexibility.
7, the laser beam is easy to realize the beam according to time and space, can be divided into light, can be processed at the same time and multi-beam processing and multi-position 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 focusing spot size is small, narrow weld, for plus filler metal materials. If the workpiece assembly accuracy 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 is expressed in other forms, such as vaporization, plasma formation, etc.
However, in order 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 of
generated 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 the laser parameters, so that the laser energy is converted into a majority of the energy of the metal melting, to achieve the purpose of welding.