公开(公告)号：US3914981A

公开(公告)日：1975-10-28

申请号：US54347375

申请日：1975-01-23

Applicant: ASEA AB

Inventor： NILSSON JAN ,  SYVAKARI PERTTI

IPC: B21C23/00 ,  B21C25/02

CPC classification number: B21C25/02 ,  B21C23/007

Abstract: A composite die for hydrostatic extrusion is composed of a preforming portion with a conical inlet portion and an endforming portion, separated from each other along a radially dividing plane. A force-absorbing support ring surrounds that part of the end-forming portion which is in contact with and nearest the pre-forming portion. There is a gap on the outside of the part of the end-forming portion remote from the pre-forming portion. Separate rings surround and abut the calibrating endforming portion and the support ring.

Abstract translation: 用于静液压挤出的复合模具由具有锥形入口部分和端部形成部分的预成型部分组成，沿着径向分割平面彼此分开。 力吸收支撑环围绕与预成形部分接触并最接近的端部成形部分的部分。 在端部形成部分的远离预成形部分的部分的外侧上有间隙。 独立的环围绕并邻接校准端部形成部分和支撑环。

公开(公告)号：US3526116A

公开(公告)日：1970-09-01

申请号：US3526116D

申请日：1968-02-29

Applicant: ASEA AB

Inventor： LANDA TORSTEIN ,  CLAESSON HARRY ,  SYVAKARI PERTTI

IPC: B21D22/12 ,  B30B5/02

CPC classification number: B21D22/12 ,  B30B5/02

公开(公告)号：US3893320A

公开(公告)日：1975-07-08

申请号：US51130174

申请日：1974-09-30

Applicant: ASEA AB

Inventor： SYVAKARI PERTTI

IPC: B21C23/21 ,  B21C23/00 ,  B21C23/08

CPC classification number: B21C23/007

Abstract: A press for the hydrostatic extrusion of tubes includes a billet holder through which passes a mandrel. There is an annular rib on the front face of the billet holder which is engageable with the back end of the billet. There are also passages opening from the rear of the billet holder into the spaces within and outside of the annular rib. Resiliently held valves with different spring pressures acting thereon control these passages. A billet is inserted having an opening in its front end smaller than the diameter of the mandrel, and upon the application of pressure to a mandrel holder the mandrel is driven through the front end of the billet, enlarging the opening therein, while the pressure in the spaces referred to above prevents harmful tensile stresses in the die.

Abstract translation: 用于静液压挤出管的压力机包括通过心轴的坯料保持架。 在坯料保持器的前表面上有一个可与坯料的后端接合的环形肋。 还存在从坯料支架的后部开口到环形肋内部和外部的空间的通道。 具有作用于其上的不同弹簧压力的弹性保持阀控制这些通道。 插入一个坯料，其前端的开口小于心轴的直径，并且当对芯棒保持器施加压力时，心轴被驱动通过坯料的前端，从而将其中的开口扩大， 上述空间防止模具中的有害的拉伸应力。