Forging forming process of large pipe produced on vertical hydraulic press was discussed. Relative tools and dies were designed, and production process was drawn up.
探讨在立式水压机上生产大型管材的锻造成型过程，设计相应的工模具，制订生产工艺。
2
The cold-bent pipes with different diameters must be equipped with the pipe-bending dies matching with them.