Ring forging equipment and ring forging method for grain refinement forge piece

The ring forging equipment comprises a machine body, a supporting mechanism and a forging and pressing mechanism, the supporting mechanism and the forging and pressing mechanism are arranged on the machine body, the forging and pressing mechanism is arranged over the supporting mechanism, and a forging and pressing head is arranged at the bottom of the forging and pressing mechanism. The device is characterized in that centering mechanisms are symmetrically arranged on the portions, on the two sides of the supporting mechanism, of the machine body respectively, and the centering mechanisms are arranged on the machine body in an up-down moving mode; a jacking positioning assembly is arranged in the middle of the supporting mechanism, the jacking positioning assembly retracts into the supporting mechanism in the retracting state, and the top of the jacking positioning assembly is arranged over the supporting mechanism in the extending state of the jacking positioning assembly. The forging and pressing mechanism