TOOL FOR FORMING TUBES AT VERTICAL PRESS Russian patent published in 2013 - IPC B21C25/00 B21C23/08 

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and may be used in making long steel tubes by hot forming at vertical press using glass grease. Proposed tool comprises container lower die unit, needle with holder and ram with die. Cores with taper end and head are radially arranged in die. Said cores may displace. Core heads are located on die outer side. Ring is fitted on die and aligned therewith. Ram has ledge with annular groove to support die. Tape ends of cores are fitted in ram annular groove and locked by said ring before and in forming. Said ring may be deformed by cores in shifting after forming during lift of ram to allow removal of die from ram.

EFFECT: expanded processing performances, reduced heat losses.

1 dwg