Mechanical arm for assembling circuit board

The utility model discloses a mechanical arm for assembling a circuit board, which comprises a groove body, a support block fixedly connected outside one side of the groove body, a mechanical arm body arranged on the top surface of the support block, a welding machine connected with the tail end of the mechanical arm body, a feed opening arranged at the right end of the front side of the groove body, a guide groove obliquely arranged at the feed opening, and fixedly connected with the groove body. A discharging piece is arranged on the side, close to the discharging opening, of the groove body, a feeding opening is formed in the left end of the rear side of the groove body, a base communicated with the groove body is arranged at the feeding opening, a conveying mechanism is arranged in the base, the base is fixedly connected with the groove body, and a feeding mechanism is arranged on the side, close to the feeding opening, of the groove body. The feeding mechanism and the discharging piece are arranged in th