[China Aluminum Industry Network] Aluminum has good plasticity and processing properties; good thermal conductivity and electrical conductivity; good low temperature resistance, high reflectivity to photo-thermal wave, good surface properties; non-magnetic; basically non-toxic; Sound absorption, good acid resistance, good anti-nuclear radiation performance, small elastic coefficient, good mechanical properties, etc. Therefore, aluminum is widely used in aerospace, marine, aviation, automotive, and other industries. The problem of aluminum and aluminum alloys in the application process is welding.

Difficulties in welding of aluminum alloys:

Aluminum and oxygen have strong affinity and can easily combine with oxygen in the air to form a dense and strong AL2O3 film with a thickness of about 0.1 μm and a melting point of up to 2050°C, far exceeding the melting point of aluminum and aluminum alloys, and the density is very high. About 1.4 times that of aluminum. During the welding process, the aluminum oxide film can prevent good bonding between the metals and can easily cause slag inclusion. Oxide film also adsorbs moisture, which causes the weld seam to produce pores during welding. These defects will reduce the performance of welded joints.

Welding advantages of aluminum alloy laser welding machine:

Aluminium alloys are typical eutectic alloys. Hot cracking is more likely to occur under rapid solidification by laser welding. The formation of crack-like cracks due to the formation of low-melting-point eutectics such as AL-Si or Mg-Si at the columnar grain boundaries during the crystal formation of the weld metal. Using a multi-station aluminum alloy laser welding machine equipped with a Wobble welding head, double wedge vibration welding increases the width of the weld seam, reduces the prefabrication conditions for welded parts, and also allows better weld formation. Moreover, the aluminum alloy laser welding machine also has a manipulator operating platform, the operation is more flexible, can be equipped with automation lines, and improve work efficiency. Automatic weld seam tracking system to track the shape of the weld in real time, timely correct the position of the torch according to the bead condition, achieve accurate welding, and the welding surface is more beautiful.

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