Waste steel cleaning and polishing device

The utility model discloses a waste steel cleaning and polishing device which comprises a base, a drawer is arranged at the bottom of the base, a double-head screw is rotatably connected to the base,a hand wheel is fixed to one end of the double-head screw, clamping blocks are connected to the two ends of the double-head screw in a threaded mode, and a motor is fixed to the bottom of a mounting base. A grinding disc is fixed on a driving shaft of the motor; a steel plate to be machined is placed on the upper surface of the base, the double-thread screw is driven to rotate through the rotatinghand wheel, the double-thread screw pushes the clamping block to clamp and fix the steel plate, the electric push rod is controlled to push the mounting base to move up and down, the grinding disc makes contact with the upper surface of the steel plate, and the motor is started to drive the grinding disc to grind and polish the steel plate; steel plates with different thicknesses can be polished,the linear motor is contro