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Application analysis of laser welding technology in automobile manufacturing

Views: 0     Author: hu     Publish Time: 2021-09-04      Origin: dapeng

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Laser welding technology is widely used in the field of automobile manufacturing, which can improve the functionality and style of automobiles, improve the market competitiveness of the automobile manufacturing industry, and promote the development of the automobile manufacturing industry. This article briefly analyzes the advantages of laser welding technology, and analyzes the application of laser welding technology in the field of automobile manufacturing.


  1 Technical advantages of laser welding technology


  1.1 Principle of laser welding technology


The motion system of laser welding technology is a robot, which has the characteristics of small welding deformation, fast welding speed, concentrated heating, and high energy density. It has a strong heating capacity and can concentrate a large amount of energy on a small point of action, thereby quickly connecting sheet.


   The main equipment of laser welding is mainly control system, welding machine, light guide system and laser, which is suitable for high-speed welding and has high energy density. Laser welding is suitable for processing with high hardness and high melting point, and has less thermal deformation on the heat-affected zone and the material itself, and has a shorter welding time. When welding machine technology is used, it will not cause wear of tools and electrodes, and will not pollute the environment. It can generate less welding heat, can achieve better stability in the production process, has smaller weld protrusion and weld width, and has high weld strength. Therefore, the use of laser welding can reduce the workload of welding preparation and welding seam processing.


  1.2 Improve the functionality and style of the car


  In the past, the automobile manufacturing industry paid more attention to the practicality and functionality of the automobile itself, and to a certain extent ignored the sense of shape of the automobile. At present, the demand of car consumers for family cars has changed from the pure pursuit of practicality to the pursuit of both functionality and styling. The application of laser welding technology in the field of automobile manufacturing can enable automobile manufacturing to achieve the coexistence of functionality and style, and meet consumers' consumer requirements for automobiles.


  1.3 Improve the competitiveness of the automobile manufacturing industry


   The application of laser welding technology in the automobile manufacturing industry can improve the quality of welding, make the automobile more wear-resistant, corrosion-resistant, and lighter, thereby improving the level of my country's automobile manufacturing and enhancing the competitiveness of the entire automobile manufacturing industry.


  1.4 Promote the large-scale development of the automobile manufacturing industry


  The large-scale development in the automobile manufacturing industry is conducive to the optimization of automobile manufacturing. The use of laser welding technology in the field of automobile manufacturing can greatly improve production efficiency. The welding work consumes the most labor and time in the entire automobile manufacturing process. Therefore, improving the efficiency of welding is conducive to improving the efficiency of the automobile manufacturing industry.


  2 Application of laser welding technology in automobile manufacturing


   The application of laser welding technology in the field of automobile manufacturing mainly includes laser welding, laser tailored welding and laser hybrid welding.


  2.1 Laser welding


  In automobile manufacturing, gears are a very important part. Laser welding technology was first applied to the welding of automobile transmission gears. Since automobile manufacturing has high requirements for the speed and weight of transmission gears, it is necessary not only to ensure the quality of welding, but also to improve the clarity of the welding technology to avoid burdening the gears.


  The use of laser welding technology in the gear welding of the transmission can improve the accuracy of the gear welding of the transmission. In the 1980s, the technology was first introduced and used by the three major US automobile manufacturing companies, which greatly improved the welding quality and welding efficiency of transmission components, and has the advantage of saving costs. This has also promoted the development of American automobile manufacturing technology.


Traditional automobile manufacturing materials can no longer meet the current consumer demand for automobiles. Therefore, lightweight materials such as magnesium and aluminum are used more and more frequently in the automobile manufacturing industry. If traditional spot welding methods are used to process lightweight materials , It will cause the formation of metal bond compounds, which will seriously affect the service life and use effect of welding. Therefore, laser welding is commonly used in current automobile manufacturing to weld gears of transmissions.


  2.2 Laser Tailor Welding


   Laser tailored welding technology is mainly used in car body manufacturing. The traditional way of car body manufacturing is to stamp and weld, that is, to stamp each part and then weld it together. The disadvantage of this welding method is that the formed parts are difficult to integrate well or cannot be satisfied. The welding effect. With laser tailored welding technology, different parts can be welded first, and then stamped and formed. In this way, different steel plates can be selected according to the position of the body during welding.


  Using laser tailored welding technology can not only reduce the number of parts used, but also improve the efficiency and accuracy of welding and reduce manufacturing costs. According to research statistics, laser tailored welding can save about 10% of manufacturing costs compared with traditional welding methods. It can be said to be the most advanced car body welding technology. At present, my country's Chery, GM, Volkswagen and other automobile companies have begun to introduce laser tailored welding technology.


  2.3 Laser hybrid welding technology


   Make improvements on the basis of laser welding technology and develop it into laser hybrid welding technology. This technology combines the two technologies of arc welding and laser welding, and overcomes the shortcomings of the two technologies. The shortcomings of laser welding technology are reflected in the narrow heating area and deep weld seam. On the contrary, arc welding has a wider heating area. Therefore, the use of laser hybrid welding technology can expand the heating area, guarantee the depth of the weld, and at the same time can effectively improve the efficiency and speed of the welding, so that the stability of the laser welding technology is improved.


  3 Conclusion


   The extensive application of laser welding technology in the field of automobile manufacturing can effectively improve the quality and efficiency of welding, thereby promoting the development of my country's automobile manufacturing industry. Of course, laser welding technology also has its shortcomings and shortcomings. In the automobile manufacturing industry, the application prospects of laser welding technology are very wide. In the process of application, it must be further improved and improved, so that laser welding technology can be used in the field of automobile manufacturing. Play a greater role, and promote the continuous improvement of my country's automobile manufacturing technology, and narrow the gap between my country's automobile manufacturing technology and developed countries.


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