DN-25 Spot Welding Machine

Users may refer to the following process data when using the machine:

1. Welding Time: When welding medium and low-carbon steel, this welder can utilize either the high-norm welding method (instantaneous electrification) or the low-norm welding method (longer electrification). For mass production, the high-norm welding method should be adopted, as it can increase production efficiency, reduce electrical energy consumption, and minimize workpiece deformation.
2. Welding Current: The welding current is determined by the size, thickness, and condition of the contact surface of the workpieces. Generally, the higher the electrical conductivity of the metal, the greater the electrode pressure, and the shorter the welding time should be. Consequently, the required current density also increases.
3. Electrode Pressure: The purpose of applying pressure by the electrodes on the workpieces is to reduce the contact resistance at the weld point and to ensure the necessary pressure for the formation of the weld point.
4. Shape and Size of Electrodes: The electrodes are made of chrome-zirconium copper. The diameter of the electrode contact surface is approximately as follows:
   The diameter of the electrodes should not be too small to avoid excessive heating and rapid wear.
• When δ ≤ 1.5 mm, the diameter of the electrode contact surface is 2δ + 3 (mm).
• When δ ≥ 2 mm, the diameter of the electrode contact surface is 1.5δ + 5 (mm).
• δ — the thickness of the thinner workpiece among the two (mm).