Design method of extrusion die for drum shaft forgings

The invention provides a design method of a drum shaft type forge piece extrusion die, which comprises the following steps of: S1, obtaining an initial forge piece drawing of a drum shaft by adopting a shape follow-up design method according to the shape of a rough machining delivery drawing of the drum shaft, not designing pattern draft, designing machining allowance and punching wad; s2, the shape of a punch is designed according to the shape of the initial forging of the drum shaft, and the length of a working tape is determined to be 30-70 mm; s3, an inclined surface is designed at the bottom of a cavity of the female die, the inclined surface is designed according to the shape of a part, the thickness of a punching wad and the size of a working tape, and design of the drum shaft extrusion die is completed; and S4, optimization of the drum shaft extrusion forge piece is completed according to the inclined plane, and extrusion simulation is conducted on the drum shaft forge piece. The drum shaft forge piec