Double-spindle vertical internal grinding machine

The utility model provides a double-spindle vertical internal grinding machine, and belongs to the technical field of mechanical equipment. The problems that a single-shaft machining structure of a traditional vertical internal grinding machine is low in machining efficiency and high in machining cost are solved. The double-spindle vertical internal grinding machine comprises a machine tool base and a workbench located on the machine tool base, two chucks which are symmetrical left and right and used for clamping workpieces are arranged on the machine tool base, and internal grinding devices which can be provided with internal grinding machining tools and can move front and back and up and down are arranged on the two sides of the workbench. A first servo motor for controlling the internal grinding devices to move up and down is arranged at the top of the workbench, and second servo motors for controlling the two internal grinding devices to move front and back are arranged on the two sides of the workbench c