Application Status of Energy-Efficient Welding Technology | What Determines Modern Welding？
Application Status of Energy-Efficient Welding Technology | What Determines Modern Welding？
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Along with the development of various industries and the progress of modern science and technology, welding technology is widely used in various industries. At present, welding technology has become a very important part of industrial production. The good or bad welding process is also directly related to the service life and service quality of the product. Therefore, an efficient and energy-saving welding process is of great significance for future industrial development.
Application Status of Energy-Efficient Laser Welding Technology
1.Oil pipeline
The use of aluminum tubing can effectively increase the diameter and wall thickness of the tubing. Thus, it can withstand a greater flow of crude oil in a certain period. Pipeline transportation of oil is very dangerous and prone to leakage. Once the leakage may cause incalculable property losses, casualties, environmental pollution, water pollution and other major hazards. In the process of realizing the laser welding of aluminum alloy pipes, it achieves the effective control of the quality of the weld seam. Thus, great economic benefits with reduced losses obtained.The method ensures one-time molding with a fairly high welding quality.
2.New energy vehicles with aluminum alloy shells
Square shell core is the most popular aluminum alloy laser welding equipment. It mainly includes shell seals, explosion-proof valves, pole posts, liquid injection holes and flexible connections. The pure aluminum and 3 series aluminum alloys used have excellent weldability. In particular, the use of oscillating laser welding technology produces welds that are virtually defect-free and meet sealing requirements. High-quality and efficient laser welding using a common fiber laser and a scanning vibrating mirror welding machine is possible. A complete set of market-oriented, individualized laser welding equipment is now available. The battery module and battery bracket of new energy vehicles are highly individualized, with 6-series aluminum alloy as the main alloy, and a small amount of 5-series aluminum alloy, and MIG and FSW are mostly used at present.
Depending on the requirements and design features of the product they can categorized into two types.
The first category is non-load-bearing modular battery housings with a thickness of 1.5 mm, which do not require enclosure of the entire structure.This can take place by lap welding, butt welding, lap fillet welding, etc. The use of single lasers or oscillating lasers allows for the required melting depth and width. Since the demand for these products is relatively easy, there is no difficulty in manufacturing them, and mass production is now available. However, the single laser welding process places great demands on the assembly space of the workpiece. Therefore, the dimensional accuracy of the material and the clamping process have a great influence on the stability of the weld.
The second category is products with airtightness, whose plate thickness is generally 3mm-5mm. need to maintain a certain holding pressure state for a specific period of time and assemble with aluminum alloy profiles. Including butt joint, angle, lap joint and other forms. Because of its size is smaller than the battery tray, and the use of harsh environments, manufacturers and users are looking to upgrade it from MIG welding to laser welding. Currently, the technology is in the process of development and testing by research institutes, laser suppliers and component manufacturers.
3.Shipbuilding Aluminum Alloys
Aluminum alloy can effectively reduce the self-weight of the hull due to its light weight and other characteristics. Thus improving the safety and stability of its navigation. Therefore, a wide range of it applied to some ships, such as yachts, cruise ships, submarines, fishing boats and so on. Laser welding technology finds wide application in the ship manufacturing industry as well. Ship structure is huge, its welding technology in the ship manufacturing industry plays an important role. High-strength welds can be achieved through laser welding, reducing the amount of aluminum alloy required. Realize light weight and high strength. American scholars have calculated that an aircraft carrier built with laser welding technology can save 200 tons of heavy material. Those mega cruise ships under construction in Europe are already utilizing more than 20 percent of their capacity, with plans to exceed 50 percent in the future.
4.Aircraft aluminum alloy plate shell
Lightweighting of aviation aircraft plays an important role in reducing fuel consumption, improving range and extending aircraft life. Since the price of aluminum alloy is lower than that of titanium alloy and carbon fiber composite material. Therefore, aluminum alloys find their way into a large number of aero-engines. Currently, the main aluminum alloys are the 7-series, 6-series and 2-series.
In the connection of aircraft wall panels and longitudinal beams, the conventional practice is the riveting process. Lap joints between the skin and the longitudinal beams. . In response to the low productivity and quality problems caused by riveting and longitudinal beam splicing in the existing process. The trusses and skins replaced with T-shaped structures and synchronized laser filler welds on the left and right sides, respectively.Replacing the lap edge and rivets to reduce the weight of the fuselage, improve connection efficiency and reduce manufacturing costs. For example, the eight panels of the A380 are laser welded on both sides to reduce the weight of the airplane by 10%.
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