Multi-station inner hole cleaning and grinding machine

The utility model discloses a multi-station inner hole cleaning and grinding machine. The device comprises a base and a workbench, the workbench is fixed to the outer side of the top of the base in asleeving mode. Clamping bases are welded to the upper surface of the workbench at equal angles. Four clamping grooves are formed in the outer surface wall of the main shaft at equal angles; and the inner surface walls of the four clamping grooves are elastically connected with the dull polish head through spring pipes, a limiting plate is welded to the upper surface of the workbench and located above the clamping base, a limiting hole is formed in the center of the limiting plate, and electric push rods are symmetrically arranged on the upper surface of the limiting plate and located on the two sides of the limiting hole. According to the pipeline inner hole grinding machine, the spring pipe and the grinding head are elastically connected, the extending depth of the grinding head can be changed according to the wo