One-time charging and multi-time discharging control mode of capacitor energy storage resistance welding machine

The invention discloses a one-time discharging and multi-time charging control mode of a capacitor energy storage resistance welding machine. Different voltages are set on different capacitor groups by the welding machine, guiding combination and switching are conducted on different SCR by the welding machine, multi-time discharging through one-time charging of the welding machine can be achieved,after the welding machine completes charging, and the welding machine can make each capacitor group perform discharging in order through a charging capacitor combination and the discharging capacitorcombination control system so as to achieve the fact that the welding time can be prolonged; meanwhile, the welding machine can generate different welding current and different discharging processesin the same welding process so as to achieve the fact that the first discharging process can be used to conduct pre-heating so that the purpose of removing the coating or plating is achieved, so thatthe effect of completing the