Inner hole polishing device for slender workpiece

The inner hole polishing device comprises a bearing plate, a fixing mechanism and sand blasting equipment, a first supporting plate and a second supporting plate are fixedly connected to the bearing plate, a rotating hole is formed in the first supporting plate, the first supporting plate is rotationally connected with a telescopic assembly through the rotating hole, a screw rod is fixedly connected to the telescopic assembly, and the fixing mechanism is fixedly connected with the sand blasting equipment. The end, away from the telescopic assembly, of the screw rod is fixedly connected with a fixing mechanism used for clamping and fixing the long and thin workpiece, the second supporting plate is fixedly connected with sand blasting equipment, and the sand blasting equipment is provided with a lengthened spray head used for conducting sand blasting polishing on an inner hole of the long and thin workpiece. Through the cooperation of the whole structure, the length-diameter ratio of the spray head is increased