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Aluminum alloy has been used in the shipbuilding industry for nearly a hundred years. With the rapid development of the domestic and foreign shipbuilding industry, the weight reduction of ships has been paid more and more attention. Due to the low density, high strength, high rigidity and corrosion resistance of aluminum, ships built with aluminum have a weight reduction of 15-20% compared to ships built with steel. Aluminum alloy has h igh toughness, corrosion resistance and low processing cost, which makes the ship made of aluminum alloy very advantageous, so that the ship made of aluminum alloy can achieve higher speed and longer service life. These advantages of aluminum alloy make it develop rapidly in the application of ships, and the shipbuilding industry provides a broad application market for aluminum materials.
Aluminum alloys used on ships can be divided into deformed aluminum alloys and cast aluminum alloys. Applications in shipbuilding in various countries, from the construction of superstructures of large surface ships, thousands of tons of all-aluminum marine research ships, ocean-going commercial ships and passenger ships, to hydrofoil, hovercraft, passenger ferry, catamaran, transportation boat, landing craft All kinds of high-speed passenger ships and military speedboats use a large number of deformed aluminum alloys. Cast aluminum alloy is mainly used for pumps, pistons, outfitting and rainwater mine shells.
Aurora (Dalian) Shipbuilding Co., Ltd. was established in 2006 as a Sino-European joint venture specialized in manufacturing aluminum alloy ships. The aluminum alloy boats designed, built and delivered by the company so far include: port piloting boat series, transportation boat series, high-speed fishing boat and luxury yacht, etc. , Institutions are used in large quantities and exported to Europe, Africa, the Middle East, Southeast Asia and many other countries.
Welding of the hull of the yacht, the welds of the ribs are mostly butt joints and corner joints. The formal installation method is adopted, and the vertical welding is used, and the conventional pulse welding machine is used. Customers have always had the following problems restricting on-site production:
① The arc energy is not concentrated enough, and the welding speed is slow, which causes the workpiece to deform greatly, making it difficult to control the overall size.
② The welding seam is poorly formed, the color is black, and the penetration depth is insufficient, the mechanical properties are seriously reduced, which affects the overall quality performance of the yacht
③ There are many defects in arc starting and closing, and it will take a lot of time to repair in the later stage, and the cost is high. And the penetration depth is insufficient, the mechanical properties are seriously reduced, affecting the overall quality performance of the yacht
Megmeet recommends welding equipment and solutions
According to the actual situation of the customer, the McGemett Artsen PM500A welding machine is recommended, using the pulse aluminum welding process. Artsen PM500A is an all-digital high-frequency intelligent inverter welding machine that can perform DC and pulse all-position welding of carbon steel, stainless steel, aluminum alloy and other materials. This welding machine has the following advantages to solve customer problems:
① Through the new control scheme and reasonable process parameter optimization, the arc starting is flexible, the arc closing is stable, and defects are eliminated. The arc starting and closing parameters are open and adjustable to ensure the overall quality of the weld.
② The optimized aluminum welding pulse process makes the arc energy more concentrated, the penetration depth is deepened, the welding speed is accelerated, the heat input is reduced, the spatter is low, the shape is uniform, and the color is silvery white.
③ Store a variety of aluminum welding expert data, a wide range of application, and open the parameters of each phase of pulse welding, fine-tuning according to the site conditions, to obtain high-quality welding results.
④ The wire feeder adopts high-performance digital motor, four-wheel wire feeder and precise wire feeder mechanism to ensure wire feed stability, and then ensure good welding.
With the use of Magmite Artsen PM500A welding, the arc starting and closing defects basically disappeared. Fillet welding penetration reaches 2mm to meet customer needs. The weld scales are beautiful and clear with silvery white color. The arc energy is concentrated and the welding speed is fast, which greatly reduces the heat input, ensures good mechanical properties of the weld, and has small deformation of the workpiece, which meets tolerance requirements.