Combined ultrasonic micro-forging device for improving microstructure and mechanical properties of additive manufactured metal parts, and a related additive manufacturing method

A combined ultrasonic micro-forging device for improving microstructure and mechanical properties of additive manufactured metal part, comprising:

• a transducer, a pneumatic sliding table, a pneumatic sliding table connecting frame, an amplitude transformer, a tool head and a roller;
• wherein the transducer is provided in a transducer housing, the transducer housing is provided with a socket connector and a pipe joint, the amplitude transformer is connected under the transducer, the tool head is connected under the transducer, the roller is located between the tool head and a workpiece, and the pneumatic sliding table is connected to the transducer housing and the amplitude transformer via the pneumatic sliding table connecting frame;
• wherein the pneumatic sliding table provides downward pressure, drives the transducer to operate downward, and provides continuous pressure, and wherein the roller vibrates in high frequency on a metal deposition layer when one layer is deposited, and at the same time, an ultrasonic energy is transmitted, via a direct action and a contact with the deposition layer, to a local plastic deformation area formed by rolling.