Analysis of the causes of spatter during spot welding


The spatter found in the initial phases of spot welding can be caused by unclean surfaces, therefore, pay attention to the utmost cleanliness of the spot welder's working elements to attain an optimal outcome. Additionally, it is plausible that poor and uneven pressure distribution between the spot welder and contact surface may cause elevated local current density resulting in the early melting of the welded object, thereby producing spatter.

1. How to prevent spattering in the pre-spot welding?

We need to strengthen the cleaning of the spot welder and welding material both before and after each use to ensure the cleanliness of the welding material. Particular attention should be given to pre-pressure during the welding procedure. If possible, it is advisable to elevate the preheating current to slow down the heating speed.

2. If the spot welder spatters late in the spot welding process, what is the cause?

This may be caused by the excessive pressure during spot welding, which exceeds the electrode pressure range, therefore causing the plastic ring to break and spatter. We can prevent the flight aid by shortening the energizing time and reducing the current.

What's more, for the spot welder to operate at its best, proper maintenance is imperative. By adhering to proper operation and maintenance procedures, we can not only extend the lifespan of the equipment, but also enhance its effectiveness throughout its usage.

And the spot welder necessitates periodic cleaning to maintain the cleanliness of its body. It is imperative to exercise caution while using the air gun to remove dust, as excessive air pressure may end up blowing away other delicate parts present on the circuit board.

It is recommended to check the gas channel regularly, as any blockages or leaks in the waterway system may adversely impact the welding process. The gas channel pressure gauge should be consistently monitored to ensure optimal performance of the machine. Moreover, regularly replacing the cooling water in the waterway is advised to ensure that the water is free from impurities and can effectively aid in the cooling process.

3. Repair the electrode head regularly to ensure that the electrode head meets the specified size and the electrode is smooth and burr-free.


The output current size is a crucial factor when it comes to the energy storage spot welder. Excessive current can cause capacitor burning, oxidation, or blackening of the solder joint, while insufficient current can result in low spot welding efficiency. Therefore, users need to be careful when cho
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