Precautions for welding nuts

Although the strength of the welded nut is high and it is not easy to loosen, some matters need to be paid attention to in the use process, so that the welded nut can be connected and used. The so-called welding is to make two separate parts into a whole, melt the metal at high temperature and mix it together and then cool it. The alloy will be added in the middle. The internal force is the function of molecular force, which is slightly larger than the general matrix. Therefore, the use of weld nuts is very extensive.

So what do we need to pay attention to when using weld nuts? The matters needing attention when using weld nuts are as follows:

1. The power supply with vertical external characteristics is adopted, and the positive polarity is adopted for direct current (the welding wire is connected to the negative electrode).

2. Generally suitable for welding thin plates below 6mm, with the characteristics of beautiful welding seam shape and small welding deformation.

3. The protective gas is argon with a purity of 99.99%. When the welding current is 50-150A, the argon flow is 8-10L/min, when the current is 150-250A, the argon flow is 12-15L/min. (Guide: Talking about several major problems of high-light fastener products)

4. The protruding length of the tungsten electrode from the gas nozzle is preferably 4-5mm. It is 2-3mm in places with poor shielding properties such as fillet welding, and 5-6mm in places with deep grooves. The distance generally does not exceed 15mm.

5. In order to prevent the appearance of welding pores, the welding parts must be cleaned up if there is rust, oil stains, etc.

6. Welding arc length, when welding ordinary steel, 2~4mm is better, and when welding stainless steel, 1~3mm is better, if it is too long, the protection effect will not be good.

7. In order to make the argon gas well protect the welding pool and facilitate the welding operation, the center line of the tungsten electrode and the welding workpiece should generally maintain an angle of 80-85°, and the angle between the filler wire and the surface of the workpiece should be as much as possible The ground is small, generally about 10°.

8. In order to make the argon gas well protect the welding pool and facilitate the welding operation, the center line of the tungsten electrode and the welding workpiece should generally maintain an angle of 80-85°, and the angle between the filler wire and the surface of the workpiece should be as much as possible The ground is small, generally about 10°.

9. Windproof and ventilation. In windy places, be sure to take measures to block the net, and take appropriate ventilation measures indoors.

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