Device and method for regulating and controlling machining residual stress of large crankshaft through high-energy acoustic beam

The invention provides a device and method for regulating and controlling large crankshaft machining residual stress through high-energy acoustic beams. The device comprises a crankshaft to be regulated and controlled, a crankshaft support, a connecting rod regulation and control assembly tool at a connecting rod journal, a main shaft regulation and control assembly tool at a main journal, a crankshaft pressing plate and a supporting platform. The supporting platform is a high-rigidity supporting platform, and the crankshaft support and the supporting platform are in interference fit through positioning pins and studs. The crankshaft is placed on the V-shaped crankshaft support to be self-centered and is fixed through the crankshaft pressing plate. The connecting rod regulation and control assembly tool is tightly attached to the crankshaft connecting rod journal through the fixer; the main shaft regulation and control assembly tool and the crankshaft support are connected and fixed through bolts and nuts, an