Intermediate-frequency alternating-current welding machine

The utility model relates to the technical field of welding machines, and discloses a medium-frequency alternating-current welding machine which comprises a machine base, a machine frame is fixedly connected to the top of the machine base, a fixing table is fixedly connected to one side of the machine frame, a lifting groove is formed in one side of the machine frame, and a lifting plate is slidably connected into the lifting groove. One end of the lifting plate extends to the outer side of the rack and is fixedly connected with a welding seat, the bottom of the welding seat is fixedly connected with a welding head, a limiting hole is formed in the lifting plate, a limiting rod is slidably connected in the limiting hole, and the top end and the bottom end of the limiting rod are fixedly connected with the top inner wall and the bottom inner wall of the corresponding lifting groove correspondingly; the bottom of the fixed table is slidably connected with a movable hinge mechanism. According to the automatic we