公开(公告)号：US3712103A

公开(公告)日：1973-01-23

申请号：US3712103D

申请日：1970-11-16

Applicant: CEFILAC

Inventor： MALEGUE A

IPC: B21J5/10 ,  B21C23/04

CPC classification number: B21J5/10

Abstract: An improvement in the hot piercing of a previously cold drilled metal billet in which the bottom of the piercing press is equipped with a frustoconically bored ring, the aperture of which noticeably exceeds the cross-section of the desired billet bore or the expanding tool. During extrusion in an extrusion press, the section of the billet coming from the lower part of the piercing press is placed in the extrusion press adjacent to the dummy block.

Abstract translation: 先前冷钻金属坯料的热刺穿的改进，其中穿刺压力机的底部装备有截头圆锥形钻孔，其孔径明显超过所需坯料孔或膨胀工具的横截面。 在挤压机挤出过程中，来自冲压机下部的钢坯部分被放置在与模块相邻的挤压机中。