Special-shaped powder metallurgical product punch forming method and die

The invention provides a special-shaped powder metallurgical product punch forming method. A special-shaped powder metallurgical product is provided with at least one inclined face and is characterized in that a punching die is provided with a die inclined face with the angle corresponding to that of the inclined face, and the proportion between the angle of the inclined face of the die and the angle of the inclined face is a shrinkage coefficient of the die. Particularly, a filling opening of a traditional horizontal powder filling area is changed to the inclined angle provided with the die inclined face. Powder filling of the filling opening of the powder filling area is applicable to the inclination angle of the inclined face of the die. Correspondingly, powder filling of the powder filling area is reduced, filling of abundant powder is avoided, and accordingly uniform density of the product is guaranteed. The method facilitates uniform and automatic filling and facilitates automatic production of a pressing machine, product quality is stable, and productivity is high.