FAQ

What is a Projection Weld Nut?

Projection welding is a high-efficiency welding method that can simultaneously perform multi-point welding. It can be used to replace arc welding, brazing and seizing. The processing speed of this method is fast, and there is no other consumption except electricity, which is a great feature.

What is a projection weld nut?

The so-called projection weld nuts are mainly used for welding low-carbon steel and low-alloy steel stampings. There are many types of projection welding. In addition to plate projection welding, there are also projection welding of bolts and screws, wire cross projection welding, pipe projection welding and sheet T projection welding.

Advantages of projection weld nuts:

1. In a welding cycle of the welding machine, the inner shell is welded with multiple welding points at the same time. How many welding points can be welded at a time depends on the uniform electrode force and welding current that the welding machine can apply to each bump.

2. Since the welding current is concentrated on the bumps, and there is no problem of shunting through adjacent solder joints, a smaller overlap amount and smaller dot pitch can be used.

3. The position of the projection solder joint is more accurate than that of the spot solder joint, and because the size of the bump is uniform, the quality of the projection solder joint is more stable. Therefore, the size of the projection solder joint can be smaller than that of the electric welding joint.

4. Since the bumps can be set on one part, the traces on the exposed surface of another part can be minimized.

5. The large flat electrode used in projection welding has much less heat and wear than spot welding electrodes, which prolongs the service life and thus saves the time for repairing and replacing electrodes, and reduces the electrode maintenance costs.

6. Since smaller bumps can be used to weld multiple points at the same time, welding components with small deformation can be obtained.

7. Projection welding can effectively overcome the deviation of the nugget, so parts with a large thickness ratio (up to 6:1) can be welded.

Disadvantages of projection weld nuts:

1. Sometimes in order to prefabricate one or more bumps, additional processes are required.

2. When welding several solder joints with the same electrode at the same time, the alignment of the workpiece and the size of the bump (especially the height) must maintain high-precision tolerances to ensure uniform electrode force and welding current to ensure the quality of each solder joint Uniformly.

3. To weld multiple solder joints at the same time, a high-power welding machine with high electrode pressure and high mechanical precision is required. The application of the pressure mechanism has high follow-up properties.