Influence of Throttle Valve with Different Aperture on Gas Flow Direction and Protection Effect of Aluminum Alloy MIG Welding
An analysis was conducted on the porosity problem of 10 mm thick hard aluminum 6061 welding,and it was found that the throttle valve on the wire feeder has a significant impact on the generation of porosity in aluminum alloy.Therefore,for throttle valves with different apertures and gas flow rates,a gas imaging instrument was used to compare and analyze the airflow morphology,flow rate,and compressibility of the arc at the outlet of the welding gun,and actual welding verification was also carried out.This provides a basis for further studying the influence of throttle valves with different apertures on the welding porosity and arc stability of aluminum alloys,as well as a reference for the selection of throttle valve apertures for wire feeders.
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