Wire feed welder generally refers to MIG welding or Pulse MIG welding, which uses the wire feeding mechanism to continuously feed the welding wire into the welding area, and cooperates with gas protection to complete the efficient welding of aluminum and its alloys. If you want to know how to weld with a wire feed welder, you can read the previous articles.
How to use wire feed welder to prepare for welding aluminum
Generally, when we use wire feed welder to weld aluminum, we need to prepare pulse MIG welder to ensure smoother aluminum welding;
Wire feed welder needs to prepare aluminum and alloy solid welding wire to ensure consistency with the base material;
Shielding gas selection Because aluminum has a very low melting point and is mostly used for thin plate welding, it is more suitable to use pure argon (Ar) or helium/argon mixed gas;
Small current short-circuit migration is not suitable for aluminum welding, and the arc is prone to instability, so pulse MIG mode is often used to control heat input when welding aluminum to avoid burning through and spatter;
MIG welding is not like TIG welding, which relies on AC arc self-cleaning. When MIG welding, the oxide film on the aluminum surface must be manually cleaned thoroughly.
Wire feeding welding aluminum welding operation
During the welding operation, the welding gun should maintain a forward tilt angle of 10 to 15 degrees, and the push welding method should be used so that the gas can fully cover the molten pool. The distance between the welding gun and the workpiece should be about 10-15 mm. The movement should be uniform to avoid pauses that may cause burn-through or pores. If the molten pool is black or boiling, check the gas flow, current and wire feeding speed immediately to see if they match. Try to succeed in one arc. If multiple ignitions are made, clean the surface again to avoid slag inclusions. At the end of welding, keep the gas for 2-3 seconds to ensure that the molten pool cools under protection to prevent oxidation and discoloration. When welding thin plates, pay special attention to reducing the current, appropriately increasing the moving speed or using pulse mode to prevent burn-through.
Wire feeding welding aluminum main welding industry
Wire feeding welding machine aluminum welding is widely used in automobile manufacturing, shipbuilding, rail transportation, aerospace, building curtain walls and home appliances and other industries, mainly for efficient splicing of aluminum alloy structural parts and thin plates. Relying on continuous wire feeding and pure argon protection, this process can achieve lightweight, corrosion-resistant and beautiful weld effects while ensuring welding strength. It is an important welding method for modern aluminum product production and repair.