公开(公告)号：US3724254A

公开(公告)日：1973-04-03

申请号：US3724254D

申请日：1970-10-16

Applicant: CEFILAC

Inventor： HUBERT R

IPC: B21C23/00 ,  B21C23/08 ,  B21C23/04 ,  B21B17/02

CPC classification number: B21C23/085 ,  B21C23/007

Abstract: Improvement in the process of hot extruding metal tubes in a hydraulic press, in which the metal billet inserted into the press has been pierced to a bore diameter largly exceeding that of the extrusion mandrel and the force of the press is applied in a progressive manner.

Abstract translation: 在液压机中热挤压金属管的过程中的改进，其中插入压力机中的金属坯料已经被刺穿到大大超过挤出心轴的孔直径，并且以渐进的方式施加压力机的力。