Grinding device for cutter groove of cutter head of dry cutting machine

The utility model discloses a dry cutting machine cutterhead cutter groove grinding device which comprises a base, a fastening part used for fixing a workpiece and a grinding part used for machining the workpiece. The fastening part comprises a rotating shaft connected with the base, a placement plate fixedly connected with the top of the rotating shaft, a first motor connected with the bottom of the rotating shaft, a sleeve fixedly connected with the top of the placement plate, a movable groove formed in the top of the sleeve, a first fixed plate arranged in the movable groove and lifting grooves formed in the two sides in the movable groove correspondingly; through the arrangement of the base, the rotating shaft, the placing plate, the first motor, the sleeve and the movable groove, the problems that although an existing grinding device can grind a workpiece, the fixing effect of the existing grinding device on the workpiece is poor, grinding of the workpiece is affected, a first bevel gear can be meshed wi