The causes of common welding defects in CO2 gas welding and the prevention methods

The reasons causing ① Insufficient CO2 gas flow (excess space) ② Air is mixed into COz ③ The protective gas is blown away by the wind ④ The nozzle is blocked by splashing particles ⑤ Gas purity does not meet the requirements ⑥ The welding part is too dirty and dirty paint ⑦ the distance between the nozzle and the workpiece is too large The welding wire is bent Air is involved in the welding area Elimination method ① Whether the gas flow is appropriate (15~25L/ min); There is no leakage in the trachea; Whether the air pipe connector is secure ② Whether the air pressure in the cylinder is greater than 1MPa ③ Windbreak measures should be taken when the wind speed is greater than 2m/s ④ Remove the splash particles on the nozzle (it is better to use splash anti-blocking agent) ⑤ Use qualified CO2 gas ⑥ Clean up the oil, rust, water, adhesion on the workpiece surface ⑦ usually 10~25mm, according to the current and nozzle diameter adjustment, the arc burning in the center of the nozzle ⑧ Straighten the welding wire ⑨ When welding in the groove, gas flows in one direction due to the tilt of the welding torch, and air is easy to be sucked in from the opposite direction; The gas flows in one direction during the girth weld, which is easy to coil the air. The welding torch should be aligned with the center of the ring seam.铜焊丝,Copper Welding Rods,铝焊丝,aluminium welding wire,镍焊条,Nickel electrode,药皮焊条,Flux Coated Brazing Welding Rods