Multi-groove type one-time machining inner-cooling combined tool

The utility model discloses a multi-groove type one-time machining inner-cooling combined cutter, relates to the technical field of cutters, solves the technical problems of low machining efficiency and poor stability caused by cutter replacement and multiple times of machining in a traditional machining method, and comprises a cutter body, a connecting block is fixedly arranged on one side of the cutter body, and a lining is sleeved on the outer surface of the connecting block. One side of the bushing is sleeved with a first grooving cutter, the other side of the bushing is sleeved with a second grooving cutter, the first grooving cutter, the bushing and the second grooving cutter are in key connection with a connecting block through an anti-rotation key, the connecting block is further provided with a locking assembly, the other side of the cutter body is fixedly provided with a connector, and the connector is provided with an inner-cooling blind rivet. According to the utility model, the tool changing time