What are the advantages and disadvantages of laser welding technology?

in recent years, thanks to the progress of laser technology, the penetration rate of laser welding equipment in various industries has been continuously improved. At the same time, the demand for new energy vehicles, lithium batteries, display panels, mobile phone consumer electronics, aerospace and other fields downstream of laser welding equipment is strong, and China's laser welding equipment has maintained steady growth. Laser welding is an efficient and precise welding method using high energy density laser beam as heat source. Laser welding is one of the important aspects of laser material processing technology application. In the 197s, it was mainly used for welding thin-walled materials and low-speed welding. The welding process belongs to heat conduction type, that is, laser radiation heats the surface of the workpiece, and the surface heat diffuses to the inside through heat conduction. By controlling the parameters of laser pulse width, energy, peak power and repetition frequency, the workpiece is melted and a specific molten pool is formed. Because of its unique advantages, it has been successfully applied to precision welding of micro and small parts.

1. High-power YAG laser welding

With the continuous development and progress of lasers, fiber lasers and disk lasers have come out one after another, and the appearance of new lasers not only brings more stable beam quality, but also more energy. The 1,-watt laser provides a broader application space for laser welding, and opens a breakthrough for splicing and overlapping thick structural parts and laser welding of high reflectivity metal materials. Therefore, high power is bound to become a main direction for the development and application of laser welding technology in the future.

2. Real-time monitoring of laser welding process

The light, vapor and plasma released during laser welding, the sound caused by the change of weld pool pressure, the ultrasonic wave caused by mechanical stress in weldments, the dielectric constant of metal vapor or plasma, the reflected laser power, the behavior of weld pool and keyhole all reflect the welding process to some extent. Direct observation and analysis of them can realize welding automation on the one hand, and intuitively understand the welding process on the other.

3. Research on laser welding of aluminum alloy

As a widely used material in aviation, the laser welding of aluminum alloy has been in an embarrassing situation: on the one hand, the deformation of laser welding aluminum alloy is small and it can reduce the weight by about 2%; on the other hand, due to the characteristics of aluminum alloy, it has strong light reflection, fast heat dissipation and is prone to defects such as blowholes. Therefore, the research on laser welding of aluminum alloy has attracted much attention and will be one of the technical directions that need to be improved and developed urgently in aviation manufacturing industry.

4. Application of various laser welding methods

With the development of laser welding technology, a single laser welding technology has been far from meeting the welding needs of different materials and different structural parts, and what emerges at the historic moment is the innovation and research of various new welding methods. Relying on the new laser welding method or the combination of various methods, I hope to solve the problems encountered in laser welding at present.

5. Application of laser welding equipment in automobile industry

Laser welding equipment has had an impact on the traditional automobile welding process, and all major automobile companies have a very positive attitude towards it. Adopting new technology means stronger competitiveness. Laser welding equipment has the greatest application prospect in welding aluminum, replacing castings with weldments and welding the whole body frame structure. Manufacturers of machine tool accessories should seize business opportunities and make efforts in engineering plastic drag chains and protective covers used in laser equipment. The towing chain and protective cover effectively protect the wires, cables and guide rails of laser welding equipment. It is especially suitable for laser processing workshops and automatic production lines. It is more suitable for the needs of automobile production lines.

Nowadays, our country is in the process of all-round development, and laser welding equipment is the top priority of processing industry, powder metallurgy, automobile industry and other manufacturing industries. With the slow recovery of the world economy and the rapid development trend of China's economic development, the demand for laser welding equipment will gradually increase. The production, supply and marketing companies of laser welding equipment should seize this good opportunity, deepen the original sales market, and diligently develop a broader potential sales market. As a leader in domestic laser technology, Boliante Technology Co., Ltd. has maintained a good cooperative relationship with many high-quality manufacturers for a long time, and is fortunate to provide the market with opportunities for advanced laser processing technology and contribute to the laser industry.

Wuhan boliante technology co., ltd. is a leader in laser equipment industry. Website: www.whbltkj.com