Spot Welding Diagram. By means of pulse forming the intensity can be adapted to the sequence of the process phases. A spot welding machine is shown in fig.
The molten metal from the two pieces flows together. The effect of environmental conditions on the de diagram was also investigated. Schematic diagram of resistance spot welding the welding heat is generated by the electric current which is transferred to the workpiece through copper alloy electrodes.
After the current is switched off the molten metal solidifies leaving a welded spot figs.
The effect of environmental conditions on the de diagram was also investigated. 45 ac supply is given to the primary of the welding transformer through the timer which controls the time for which the current flows. Depending upon the requirement the transformer will be used either to step up or step down the voltage. 3v would only get 300a which may not be enough for a good weld.