Metallographic polishing liquid automatic feeding machine

The utility model discloses a metallographic polishing liquid automatic feeding machine which is used for grinding and polishing a metallographic section. The automatic feeding machine comprises a stirring motor, a liquid storage cylinder, a stirring shaft, a vane, a hydraulic pump motor, a plunger pump, one-way valves, a connecting guide pipe, a spray nozzle and a single chip microcomputer, and is characterized in that the stirring motor is mounted at the upper part of the liquid storage cylinder, the output end of the stirring motor is connected with the stirring shaft, the vane is mounted at the lower end of the stirring shaft, the output end of the hydraulic pump motor is connected with a cam, the cam is connected with a piston of the plunger pump, the cylinder of the plunger body is connected with the liquid storage cylinder and the liquid outlet spray nozzle through guide pipes, the guide pipes at the two ends of the plunger pump are respectively provided with the one-way valve to control that the liquid can only flow in one direction. The feeding machine disclosed by the utility model has the characteristics that liquid outlet amount is accurate, liquid outlet time interval can be manually set, degree of automation is high, and application switch between an automatic function and a manual function can be realized according to different operation requirements.