Discussion on Welding Technology of New Energy Vehicles Under The Demand of Intelligent Manufacturing

 

With the proposal and promotion of the green development concept in the new era, many facilities that cater to the green and environmental protection development concept have also emerged. New energy vehicles have caused the environmental pollution and energy waste caused by traditional automobile fuel. This paper will discuss the current development status of new energy vehicles, the new welding technology used by new energy vehicles under the requirements of intelligent manufacturing, and its specific application. It is hoped that this study can lay the foundation for the production and application of new energy vehicles in real life in the future.

 

 

 

 

Basic content of new energy vehicles

 

Cars use traditional petroleum, which not only causes serious energy shortages due to energy consumption but also hurts the deterioration of the world's environment and the emission of greenhouse gases. Currently, many pollutants in the air in the world come from automobile exhaust, such as carbon monoxide, 80% comes from automobile exhaust, 40% of nitrogen oxides, 20% to 30% of urban particulate pollutants come from automobile exhaust, environmental problems In turn, it will pose a serious threat to people's lives and health, and has also attracted the attention of the country. In recent years, new energy-related technologies have gradually matured, and electric vehicles and automobiles based on new energy have also been launched on the market. The environmental benefits they bring are very significant. In the context of increasing attention to environmental issues in the future, new energy vehicles will also become the development trend in the future.

The Shanghai World Expo put forward the goal of green environmental protection in 2010. my country has also incorporated the green development concept into emerging development concepts in the 13th Five-Year Plan, paying more attention to the harmonious coexistence of man and nature. The development of new energy has also laid the foundation for the development of new energy vehicles. Different countries also have large differences in the technological development routes of new energy vehicles. Currently, electric vehicle technology is the mainstream technology among new energy vehicle technologies. Electric vehicle technology can be divided into dye battery, hybrid, and pure electric vehicle technologies. Although electric vehicle technology has gradually matured, there are still certain problems, such as manufacturing costs, driving range, etc., which are still different from traditional fuel vehicles.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

According to the differences in the battery itself, there are differences in volume, weight, power, cost, and charging time. There are problems in aspects such as these, which have also become bottlenecks for the further development of electric vehicles in today's society. To sum up these problems: the driving range is very limited: the service life of the battery is relatively short: the battery needs to cost a relatively expensive price, and problems such as charging, outlets, and charging time cannot be effectively solved in a short time.

 

 

Laser welding technology

 

Currently, the most widely used welding technology in new energy vehicles is laser welding. This new welding technology has also been successfully used in powder metallurgy, biomedicine, and electronics.

Sub-packaging, automotive industry, aerospace, etc. For new energy vehicles, one of its core components is the motor. In the specific process of manufacturing new energy vehicles, the requirements for motors are also very high. Especially during the welding process of the test piece, higher strength, higher precision, and less thermal impact are required. However, during the welding process, the welding operation space angle is very limited and will be idle. Compared with traditional welding methods, laser welding has significant advantages in new energy vehicles and will become an inevitable development trend in the future.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Advantages of laser welding technology in new energy vehicles

 

The application of laser welding technology requires the use of high-energy-density laser beams as heat sources. It is a welding method with high precision and high welding efficiency. with tradition
Compared with other welding technologies, the application advantages of laser welding technology in new energy vehicles are mainly reflected in the following aspects:

First, it can minimize the amount of heat input and also continuously reduce the scope of the heat-affected area, thereby minimizing the incidence of adverse effects caused by heat conduction.

Second, there is no need to use electrodes in the application of laser welding technology, so there is no need to consider the damage to the electrodes themselves or the pollution problems caused by them. Because the mechanism welding is different from the general contact welding method, it can also reduce the impact of loss and deformation on the machine tools.

Third, the laser tool has advantages in focusing and aligning. It will be guided by chemical instruments. During the specific welding process, it only needs to be placed at an appropriate distance from the workpiece. At the same time, the guidance process only needs to be carried out between obstacles or machines around the workpiece, and the space restrictions will be smaller.

Fourth, in a relatively closed space, that is, in an internal gas environment or a vacuum environment, the laser can be concentrated within a small range, so it can weld a small range of components. Laser welding can weld a wide range of materials, and can even weld different types of heterogeneous materials.

Fifth, the process of laser welding can easily become high-speed welding, which can be controlled by computer or digital. If you are welding some thin-diameter wire materials, they will not be affected by remelting like arc welding, nor will they be affected by magnetic fields. You can more accurately align the parts that need to be welded during the welding process. part.

Sixth, welding of two materials with different physical properties can be achieved, such as two metal materials with different resistances.

Seventh, there is no need to use X-rays for protection during the actual welding process, and there is no need for a vacuum environment.

Eighth, if the perforation welding method is used in the laser welding process, the ratio of the depth and width of the weld bead can exceed 12:1.

Ninth, the laser beam can be delivered to different workstations at the same time by converting the device.

The use of laser welding in the manufacturing process of new energy vehicles can significantly improve its social and economic benefits. It will also improve the quality of the welding interface, significantly improve its stability, and reduce the risk of joint problems. The accidents and the accident losses caused will also reduce the cost from another perspective. In addition, the application of laser welding technology in new energy vehicle manufacturing will also solve the environmental pollution problems, electromagnetic radiation, and other problems existing in traditional welding technology, and have significant social benefits.

 

 

Welding of rotor and stator laminations for electric motors

 

In the specific welding process, different and diverse processing technologies such as bonding, welding, clipping, riveting, etc. are required. Among the above processing technologies, welding technology is one of the methods with relatively lower cost and better quality. The welded parts need to use the tungsten steel sheet as the raw material of the stator core. After shearing, punching, and other related processing technologies, the stacking sheet is fixed, and then the weld is welded on the outer wall of the stator at a certain distance so that the surface of the silicon steel sheet can be welded together to form a new whole. In the process of welding the motor stator, the process used has also progressed from arc welding, carbon dioxide gas shielded welding to the current laser welding. From the perspective of the welding process, laser welding is ideal, because the original two welding methods have shortcomings in large spatter and poor forming. The material of the motor stator stacking is usually selected from hot: rolled or cold-rolled silicon steel sheet, and the welding properties are very good. If the laser welding method is used, it will not only help to improve productivity, but also improve the safety conditions of the production environment, and reduce the adverse hazards of bad oxides to the human body. In addition, by using a computer to control the output of the laser beam, the stator can meet the welding seam requirements and can be completed in one or two welding steps, saving time and greatly reducing deformation.

 

 

 

 

The emergence and application of new energy vehicles conform to the current concept of green development. However, its production and promotion are also restricted by many factors. Welding technology is an important link in the manufacture of new energy vehicle motors. The selection and application of welding technology will affect the final welding effect. This article mainly explains the advantages of laser welding technology, such as being able to meet the needs of welding different materials. With the help of the advantages of the laser itself, it can achieve 360-degree welding without dead angles, which is impossible to achieve with the application of traditional welding technology. At the same time, the specific application of laser welding technology in new energy vehicles is also analyzed, pointing out that it will bring better social and economic benefits. In the future, in the application of new energy vehicles, welding technology will also achieve new development and updates, providing a guarantee for the quality of new energy vehicles.

 

 

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