Ultrasonic rolling device for strengthening tooth root of heavy-duty gear

The invention discloses an ultrasonic rolling device for strengthening a heavy-duty gear tooth root, and belongs to the technical field of gear tooth root strengthening. The device comprises a cutter mechanism used for rolling a tooth root, a supporting mechanism used for supporting and moving a gear, and a cutter frame synchronous moving mechanism used for controlling the cutter mechanism to move up and down; the tool frame synchronous moving mechanism and the supporting mechanism are fixedly arranged on the device frame, and the tool mechanism is movably arranged on the tool frame synchronous moving mechanism and located above the supporting mechanism. The function of strengthening the tooth root through ultrasonic rolling is achieved, damage to the root of the gear is small, the strengthening effect is better, and rapid replacement of the tooth root to be strengthened can be achieved; the ultrasonic amplitude-change pole is additionally arranged in the rolling tool bit and connected with the tool nose wher