What to pay attention to when welding nuts

1. Select a power supply with straight external characteristics, and select positive polarity (the welding wire is connected to the negative pole) for DC.
2. It is usually suitable for the welding of thin plates below 6mm, and has the characteristics of beautiful weld formation and small welding deformation.
3. The maintenance gas is argon with a purity of 99.99%. When the welding current is 50-150A, the argon gas flow is 8-10L/min, and when the current is 150-250A, the argon gas flow is 12-15L/min.
4. The outstanding length of the tungsten electrode from the gas nozzle is preferably 4-5mm. It is 2-3mm in places with poor shielding such as fillet welding, and 5-6mm in places with deep grooves. The distance from the nozzle to the operation is usually not enough. more than 15mm.
5. In order to avoid the appearance of welding pores, the welding parts such as rust and oil must be cleaned up.
6. The welding arc length is preferably 2~4mm when welding ordinary steel, and 1~3mm when welding stainless steel. If it is too long, the maintenance effect is not good.
7. In order to make the argon gas well maintain the welding pool and facilitate the welding operation, the center line of the tungsten electrode and the workpiece at the welding place should usually maintain an angle of 80-85°, and the angle between the filler wire and the surface of the workpiece should be as small as possible. Usually around 10°.
8. In order to make the argon gas well maintain the welding pool and facilitate the welding operation, the center line of the tungsten electrode and the workpiece at the welding place should usually maintain an angle of 80-85°, and the angle between the filler wire and the surface of the workpiece should be as small as possible. Usually around 10°.
9. Windproof and ventilation. Please adopt the method of blocking the net in the windy place, and adopt the appropriate ventilation method indoors.

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