Simple auxiliary clamping device of metallographic specimen grinding and polishing machine

The utility model discloses a simple auxiliary clamping device of a metallographic sample grinding and polishing machine. The simple auxiliary clamping device comprises a base, a supporting column, a sample positioning frame and a sample fixing supporting frame. Supporting columns are arranged in the centers of the two sides of the top face of the base. The sample positioning frame and the sample fixing and supporting frame are respectively arranged between the two supporting columns, two ends of the sample positioning frame and the sample fixing and supporting frame are respectively connected with the supporting columns through movable connecting joints, and the sample positioning frame and the sample fixing and supporting frame can be positioned on the vertical columns in a sliding manner; a threaded rod is connected to the sample fixing supporting frame, the bottom of the threaded rod can be connected with a sample, a plurality of through holes are formed in the sample positioning frame, and the bottom of