The effect of the electrode of the commutator spot welding machine on the spot welding process

      The principle of the commutator spot welding machine is double-sided double-point overcurrent welding. During welding, the contact area of the electrode determines the current density, and the resistivity and thermal conductivity of the material is related to the generation and loss of heat. Its shape and material have a very large influence on the formation of the nugget. The strength of the solder joint is related to the change of the electrode tip. Therefore, during the welding process, the selection and operation of the electrode is very important. Here is a brief introduction to the spot welding process:

     1. Lower the electrode to the current-on stage to ensure that the workpiece is pressed tightly by the electrode;

     2. The welding current passes through the workpiece to form a nugget;

     3. Cut off the current and keep the electrode pressure unchanged until the nugget solidifies to a certain strength;

     4. Lift the electrode to its original position and start repeating the above steps.

     It can be seen from the above that the electrode is a very important part of the spot welding process.