Contravariant argon arc welding machine

The utility model discloses a contravariant argon arc welding machine, including arranging the vertical stand in the square steel tube in, swing joint in just can follow on the square steel tube the bonding tool workstation that the vertical central line of square steel tube reciprocated to and fixed connection in the base of square steel tube lower extreme, fixed connection running gear under the base, running gear moves on the guide rail, install electrical control box and welding head on the bonding tool workstation, the top of welding head sets up location core cover. The operation of this kind of contravariant argon arc welding machine is more convenient, also is favorable to whole contravariant argon arc welding machine's equipment, the removal is more nimble, has improved operating efficiency, the location is more accurate, has improved welding quality.