Slotting machine for brake disc of wind power yaw system

The utility model discloses a slotting machine for a brake disc of a wind power yaw system. The slotting machine comprises a fixed support used for being fixedly assembled with the brake disc of the wind power yaw system or a fixing part provided with the brake disc. A movable base is assembled to the fixed support in a reciprocating and moving mode in the guide direction the same as the extending direction of a groove formed in the corresponding brake disc, a cutting device is arranged on the movable base, the cutting device comprises a slotting cutter and a rotating and driving mechanism, wherein the slotting cutter corresponds to the lateral face to be slotted of the brake disc and is assembled to the movable base or a cutter rest on the movable base in a rotating mode, and the rotating and driving mechanism is transmission connection with the slotting cutter to drive the slotting cutter to cut and form a groove in a rotating mode, and a feeding mechanism for driving the movable base and the cutting device to conduct reciprocating movement in the guide direction is further arranged on the fixed support. The slotting machine can conduct slotting and machining on the brake disc of an operated wind generating set, and it is unnecessary to disassemble the brake disc from the wind power yaw system.