The utility model discloses a
gemstone processing tool with a turnover function, which relates to the technical field of
gemstone processing, and comprises a support frame, a
gemstone positioning
machine frame and a turnover
assembly, three gemstone clamping assemblies distributed at equal intervals are arranged in the gemstone positioning
machine frame, a turnover shaft is welded on the outer wall of one side of the gemstone positioning
machine frame, and the gemstone clamping assemblies are connected with the turnover shaft. The overturning
assembly comprises an installation plate welded to the side wall of the supporting frame, a gear fixedly arranged at one end of the overturning shaft in a sleeving mode, an air cylinder fixedly installed on the side wall of the installation plate and a rack fixedly connected with a
piston rod of the air cylinder. The gemstone positioning machine is provided with the overturning
assembly, so that a gemstone clamped on the gemstone positioning machine frame can be overturned, the multi-angle
machining requirement of the gemstone can be met conveniently, and the
machining efficiency and quality are improved; the gemstone clamping assembly is arranged, two arc-shaped clamps fixed to two centering rods are controlled to be centered and drawn close through rotation of a two-way screw, then gemstones of different specifications can be stably clamped, and adaptability and practicability are improved.