Frame of axial rolling device of ring rolling machine in four pull rod structure

The invention relates to a frame of an axial rolling device of a ring rolling machine in a four pull rod structure. The frame comprises a left side column and a right side column on a hypocone roller seat and an upper beam which connects the left and right side columns is arranged above the left and right side columns; threads are formed at two ends of two front pull rods and two back pull rods, the two front pull rods and two back pull rods penetrate through the hypocone roller seat, the left side column, the right side column and the upper beam and fastens the hypocone roller seat, the left side column, the right side column and the upper beam through column nuts at the upper and lower ends; flat keys are mounted on butt joint faces of the left side column and the upper beam and the hypocone roller seat respectively; flat keys are further mounted on butt joint faces of the right side column and the upper beam and the hypocone roller seat respectively; the flat keys are arranged in the middle parts of the butt joint faces along a front and back direction to play a role of positioning and bear a torsional force of a slide block rolled. The components can be respectively processed, the machining difficulty is greatly reduced, the precision is easy to ensure and the frame is convenient to assemble and maintain.