When the capacitor discharge spot welder welds different welded parts, the peak welding current should be handled and the energizing time and welding pressure should be adjusted. In addition, adjustments should be made according to the structure of the welded parts, and the material nature and thickness such as electrode material and electrode profile size should be reasonably selected.
1. Adjust the peak welding current.
Change the charging voltage of the energy storage capacitor bank and the welding current waveform. As the charging voltage of the energy storage capacitor increases, the peak current increases, but the energizing time remains almost the same and the total energy output increases. As the primary coil is reduced, the peak current increases, but the energizing time is shortened and the total energy output remains almost constant.
2. Adjustment of welding current energizing time.
As the capacity of the energy storage capacitor increases, the energizing time increases, but the peak current stays the same and the total energy output increases. Changing the transformer turns ratio: It can be seen that changing the capacitance and charging voltage of the capacitor bank and the number of turns of the welding transformer can adjust the peak welding current, energizing time and energy.
3. Selection of electrode pressure and electrode tip size.
Electrode pressure and electrode tip size selection and welding materials. Strength requirements and the size of the welded joint, you can generally select the first according to the data of the spot welder, and then corrected in welding practice to find the best welding parameters.
Since the energy storage welding is a highly regulated feature, or the change in weld quality due to changes in the size of the electrode tip is more sensitive than the general AC welding machine.
