I would like to ask you about the parameter adjustment of the spot welding nut Panasonic resistance

Yes, how to use spot welding machine:

1. When welding, the position of the electrode rod should be adjusted first, so that when the electrode is just pressed to the weldment, the electrode arms are kept parallel to each other.

2. The selection of the current regulation switch stage can be selected according to the thickness and material of the weldment. After powering on, the power indicator should be on, and the electrode pressure can be obtained by adjusting the spring pressure nut and changing its compression.

3. After completing the above adjustments, you can first turn on the cooling water and then turn on the power supply to prepare for welding. The procedure of the welding process: the weldment is placed between the two electrodes, the foot pedal is pressed, and the upper electrode is in contact with the weldment and pressurized, when the foot pedal is continued to be pressed, the power contact switch is turned on, so the transformer begins to work, the secondary circuit is energized to heat the weldment.

When the foot pedal is released after a certain period of welding, the electrode rises, and the power supply is cut off first and then restored to its original state by the tension of the spring, and the single-point welding process is over.

4. Preparation and assembly of weldments: steel weldments must be removed from all dirt, oil, oxide scale and rust before welding, and it is best to remove the oxide scale from the weld after pickling, sandblasting or grinding wheel for hot-rolled steel. Although the uncleaned weldments can be spot welded, it seriously reduces the service life of the electrode, and at the same time reduces the production efficiency and quality of spot welding.

For medium and low carbon steels with thin coatings, they can be welded directly.

1. Welding time: When welding medium and low carbon steel, the welding machine can use the strong standard welding method (instantaneous energizing) or the weak specification welding method (long-term energizing). In mass production, the strong standard welding method should be adopted, which can improve production efficiency, reduce electrical energy consumption and reduce workpiece deformation.

2. Welding current: The welding current is determined by the size, thickness and contact surface of the weldment. In general, the higher the conductivity of the metal, the greater the electrode pressure and the shorter the welding time should be. In this case, the required current density also increases.

3. Electrode pressure: The purpose of the electrode to apply pressure to the weldment is to reduce the contact resistance at the solder joint and ensure the pressure required when the solder joint is formed.

Possible causes of spot welding spatter:1Too much current 2The pressure of the two electrodes is too low 3Spot welder failure (e.g. electrode voltage before it comes into contact with the workpiece.)

The Anjia spot welding machine is usually selected according to the material and thickness of the workpiece, referring to the welding condition table of the material, and first determining the shape and size of the end face of the electrode. Secondly, the electrode pressure and welding time are preliminarily selected, and then the welding current is adjusted, the sample is welded with different currents, and after checking that the nugget diameter meets the requirements, the electrode pressure, welding time and current are adjusted within the appropriate range, and the welding and inspection of the sample are carried out until the quality of the solder joint fully meets the requirements specified in the technical conditions.

The most commonly used method of inspecting specimens is the tear method, and the hallmark of a good quality solder joint is: a round hole in one piece of the torn specimen and a round boss on the other. Thick plates or quenched materials sometimes cannot be torn out of round holes and bosses, but the diameter of the nugget can be determined by the shear fractures.

If necessary, low-magnification measurement, stretch test and X-ray inspection are also required to determine the melt absorption permeability, shear strength, and whether there are shrinkage porosity, cracks, etc.

When selecting process parameters based on specimens, the differences between the specimen and the workpiece in terms of shunting, ferromagnetic substances, and assembly clearances should be fully considered and appropriately adjusted.