Aluminum material, 1 welding characteristics: aluminum and aluminum alloy with thermal conductivity of strong and large thermal capacity, low melting point and high strength and small features, and welding difficulty is big, some measures should be taken, in order to ensure the welding quality. 2 fittings and welding wire cleaning, welding wire and break sides range surface with acetone to clean, with stainless steel wire brush to the surface oxide film, with metallic luster, clean nails drawn arc stud welding good must be welded in 2 hours. 3 tungsten use cerium tungsten rod, argon blunt matter of not less than 99.96, and the moisture content should not be greater than 50mg/m3.螺柱焊机
The future development trend of stud welding technology is mainly to expand the scope of application, improve the drawn arc stud welding machine welding automation level and welding equipment renewal. The hardware development is the key, the upcoming thyristor welding power supply control for inverter welding power supply upgrade. The switching element at present inverter with the use of fast switching thyristor and IGBT two. The inverter frequency of the former is lower, a few kHZ, but a larger output power; the latter frequency is higher, more than 10 kHZ, but with lower output power. Considering dynamic characteristics, size and weight of the power supply, the IGBT should be the direction of development.