Digital controlled inner spherical grinding machine

A type of digital controlled inner spherical grinding machine, is comprising bed piece (1), length feed carriage (13) and ball screw that drive the carriage, transverse feed carriage (7) and ball screw (2) that drive the carriage, rail (18, 21), grinding wheel dresser (10), centre fixture (12), spindle converter, lubricating system, regulator cubicle (5) and numerical control system, also comprising alternating current servomotor (8, 9), alternating current servo control system and high rate electro-spindle (3), alternating current servomotor (9) connected to ball screw (2) through clutch (16), alternating current servomotor whose output shaft fixed synchronous pulley (22) on, ball screw (6) whose fixed synchronous pulley (19) on, synchronous pulley (19) and synchronous pulley (22) that be connected by synchronous belt (20), high rate electro-spindle which is positioned on the transverse feed carriage (7). The utility model has advantages of high precision, high work efficiency, nicely dependability, etc., meanwhile, solves problems of undesired sound that exits in hydraulic, oil leakage, environmental contamination, etc.