Automatic polishing and grinding machine tool for barbecue plates

The utility model relates to the technical field of grinding devices, in particular to an automatic barbecue tray polishing and grinding machine tool which comprises a base, a grinding wheel, a driving mechanism, a sliding table and a locking mechanism, the locking mechanism comprises an abutting block, a screw, a cam and a limiting block, and the base provides installation conditions for the grinding wheel, the driving mechanism and the sliding table. When the barbecue plate is ground and polished, one side of the barbecue plate abuts against an abutting block, a cam is rotated, a protrusion of the cam rotates towards the barbecue plate on a threaded rod and moves towards the direction close to a sliding table, the protrusion of the cam is close to the other side of the barbecue plate, and meanwhile the barbecue plate is pressed; then the driving mechanism drives the sliding table to drive the barbecue plate to slide on the base and pass through the grinding wheel, the grinding wheel works to grind and polis