Aluminum alloy sheet laser welding machine

Aluminum alloy sheet Laser Welding Machine uses laser as a high-energy density light source, has the characteristics of heating block and instantaneous solidification, and has a high aspect ratio of 13:1, but due to the high reflective and good thermal conductivity of aluminum alloy sheet, and Due to the shielding effect of plasma, some defects will inevitably occur during spot welding. The two main defects of the aluminum sheet welding machine are pores and hot cracks. One of the main defects of aluminum alloy sheet laser welding equipment is the problem of pores.

The aluminum alloy sheet laser welding machine has been tested. The surface state of the aluminum material, the type of shielding gas, the flow rate and the protection method, the energy of the spot welding processing equipment and the shape of the weld all affect the generation of pores. Choose appropriate surface treatment measures (completely remove the aluminum alloy Sheet surface oil, oxide layer, keep dry), strengthen gas protection and use high power, high speed, large defocus amount (negative value) spot welding can reduce the generation of pores to a minimum.

Hot cracks are also a common defect in aluminum alloy sheet laser welding machines. During laser spot welding, the weld seam is thin, especially pulsed laser welding, the total input energy is low, the cooling rate is fast, and liquefaction cracks are not easy to occur. The generation of hot cracks is one of the key technologies of aluminum alloy sheet laser welding equipment. During pulse spot welding, adjusting the pulse waveform and controlling the heat input can also reduce crystallization cracks.

When using the aluminum alloy sheet laser welding machine, the stability of the energy makes the hot crack not obvious, most of the aluminum sheet welding will not be brittle, and it has a certain toughness after welding, which has obvious advantages. Spot welding processing equipment, the speed of straight seam welding of aluminum sheets can reach 2m per minute, which can meet the requirements of processing manufacturers and customers in terms of efficiency.