Application field and main characteristics of 2000W laser welding are introduced

Application field and main characteristics of 2000W laser welding are introduced

At present, the expansion of laser welding application field, mainly used in: manufacturing applications, powder metallurgy field, automobile industry, electronics industry, biomedicine, other fields such as BT20 titanium alloy [22], HEl30 alloy [23], Li-ion battery [24] laser welding.

Laser welding is characterized by minimal deformation of welded parts, almost no connection gap, welding depth/width ratio is high, so the welding quality is higher than the traditional welding method. However, such as to ensure the quality of laser welding, that is, laser welding process monitoring and quality control is an important content in the field of laser utilization, including the use of inductance, capacitance, acoustic wave, photoelectric and other sensors, through computer processing, for different welding objects and requirements, such as weld tracking, defect detection, weld quality monitoring and other projects, Automatic laser welding can be realized by adjusting welding process parameters through feedback control. In laser welding, the beam focus position is one of the most critical control process parameters, in a certain laser power and welding speed, only the focus in the * position range to obtain the maximum penetration depth and good weld shape. In the actual laser welding, in order to avoid and reduce the factors affecting the stability of the focus position, the need for special clamping and equipment technology, the degree of this equipment and laser welding quality is complementary.

The main characteristics of laser welding. Compared with other traditional welding technology, the main advantages of laser welding are: 1, fast speed, large depth, small deformation. 2, can be welding at room temperature or special conditions, welding equipment is simple. For example, a laser passes through an electromagnetic field and does not deflect the beam; The laser can be welded in vacuum, air and some gas environment, and can be welded through glass or transparent beam materials. 3, can be welded refractory materials such as titanium, quartz, and can be welded to heterosexual materials, good effect. 4, laser focusing, high power density, in high power device welding, depth to width ratio up to 5:1, up to 10:1. 5, can be micro welding. The laser beam can obtain a small spot after focusing, and can be positioned, which can be used in the mass automatic production of micro and small workpiece welding. 6, can be welded difficult to access the parts, the implementation of non-contact long-distance welding, with great flexibility. Especially in recent years, optical fiber transmission technology has been adopted in YAG laser processing technology, which makes laser welding technology more widely popularized and applied. 7, the laser beam is easy to realize the beam according to the time and space split.It can carry out multi-beam processing and multi-station processing at the same time, providing conditions for more precise welding.

However, laser welding also has certain limitations: 1. It requires high precision of welding parts assembly, and the position of the beam on the workpiece can not be significantly offset. This is because after laser focusing, the spot is small, the weld is narrow, and it is filled with metal materials. If the workpiece assembly accuracy or beam positioning accuracy can not meet the requirements, it is easy to cause welding defects. 2, laser and related system cost is high, one-time investment is large.