Mould-repair replacing equipment for electrode caps of welding machine

The invention belongs to the technical field of welding equipment, in particular to mould-repair replacing equipment for electrode caps of a welding machine. The mould-repair replacing equipment comprises an electrode cap mould repair device and a supporting part for mounting and supporting the electrode cap mould repair device, wherein the electrode cap mould repair device comprises a transmission body as well as a motor, a driven gear and a mould repair gear mounted on the transmission body; the motor drives the driven gear to rotate; the driven gear drives the mould repair gear to rotate; a mould repair plate is mounted in the mould repair gear; a blade is arranged on the mould repair plate; and the mould repair plate rotates along with the mould repair gear, so that the blade carries out cutting and mould-repair on the electrode caps. The mould-repair replacing equipment is used for carrying out mould repairing on the electrode caps on a pair of electrodes of an automatic welding machine; the completely scrapped electrode cap can be automatically dismounted, and a brand-new electrode cap can be automatically replaced; the electrode caps of the two electrodes can be mounted, dismounted or subjected to mould-repair simultaneously; and the end surfaces of the electrodes subjected to mould-repair are concentric and fitted, so that the mould-repair speed is high.