Although the strength of the welding nut is large, it is not easy to loose, but in the use of the process also need to pay attention to some matters, so that the welding nut connection use. The so-called welding is to turn two separate parts into a whole, and mix them together after melting the metal at high temperature. The alloy will be added in the middle, and the molecular force will play a role inside, which is slightly larger than the general matrix. Therefore, welding nuts are widely used.
What do we need to pay attention to when using welding nuts? Precautions for the use of welding nuts are as follows:
1, the use of vertical external characteristics of the power supply, dc using positive polarity (wire to negative).
2. It is generally suitable for welding of thin plate below 6mm. It has the characteristics of beautiful weld forming and small welding deformation.
3. The protective gas is argon, with purity of 99.99%. When the welding current is 50-150A, the argon flow rate is 8-10L/min, when the current is 150-250A, the argon flow rate is 12-15L/min.
4, the length of the tungsten pole protruding from the gas nozzle, 4-5mm is the best, in the corner welding and other poor shelter is 2-3mm, in the deep slot is 5-6mm, the distance from the nozzle to the work generally does not exceed 15mm.
5, in order to prevent the appearance of welding pores, welding parts such as rust, oil, be sure to clean up.
6, welding arc length, welding ordinary steel, 2~4mm is the best, and welding stainless steel, 1~3mm is the best, too long is not good protection effect.
7. In order to protect the welding pool well by argon gas and facilitate the welding operation, the tungsten center line and the workpiece at the welding place should generally keep an Angle of 80-85°, and the Angle between the filling wire and the workpiece surface should be as small as possible, generally about 10°.
8. In order to protect the welding pool well by argon gas and facilitate the welding operation, the tungsten center line and the workpiece at the welding place should generally keep an Angle of 80-85°, and the Angle between the filling wire and the workpiece surface should be as small as possible, generally about 10°.
9. Windproof and ventilation. In windy places, take measures to block the net, and take appropriate ventilation measures indoors.
