Dustproof casting grinding device

The dustproof casting part polishing device comprises a polishing table, a first motor is fixedly arranged at the left end of the upper end face of the polishing table, and a three-jaw chuck is fixedly arranged at the right end of a first motor shaft; a guide rail is arranged at the right end of the upper end face of the grinding table, a tailstock is arranged on the guide rail, a tip is fixedly arranged at the left end of the tailstock, and a negative pressure adsorption device is arranged at one end of the grinding table. A first guide cross rod and a second guide cross rod are fixedly arranged at the upper ends of a left vertical support and a right vertical support of the grinding table, a sliding table is arranged on the first guide cross rod and the second guide cross rod, an air cylinder is fixedly arranged on the front end face of the sliding table, a second motor is fixedly arranged at the lower end of a piston rod, and a second motor shaft is arranged at the lower end of the second motor. And a grin