Novel upper hole flanging die structure for U-shaped stamping part

The invention relates to the field of stamping equipment, and particularly discloses a novel upper hole flanging die structure for a U-shaped stamping part, which comprises a female die frame, a hole flanging female die, a male die frame and a hole flanging male die, one side of the male die frame is open, a to-be-machined part can be conveniently placed in the male die frame, and meanwhile structures of other places are adaptively optimized. After the to-be-machined part is placed in place, the to-be-machined part is jointly clamped and properly extruded by the female die frame and the male die frame, then the to-be-machined part is clamped and properly extruded by the hole flanging female die and the hole flanging male die, and each of four movable parts is small in stroke, stable in movement and high in structural practicability; the novel structure is high in applicability, the closing height of the movable parts is small, and the production requirements of more production devices can be met; and the nove