Metal additive manufacturing 3D printing device, system and method

The invention relates to the technical field of additive manufacturing, in particular to a metal additive manufacturing 3D printing device, system and method. The auxiliary printing head is arranged on the main printing head; the pump assembly is used for supplying materials to the main printing head and the auxiliary printing head; the hot melting assembly is connected with the pump assembly; the extruder is used for supplying materials to the hot melting assembly; the main printing head can rotate along the axis of the main printing head, and the flow direction of materials is controlled between the main printing head and the auxiliary printing head through an adjusting valve. According to the metal additive manufacturing 3D printing device, system and method, a comprehensive optimized solution is provided for the limitation of an existing metal additive manufacturing technology in the aspects of supporting limitation, operation precision, molten metal material management and the like. 本发明涉及增材制造技术领域，具体为一种金属