公开(公告)号：EP3372324A1

公开(公告)日：2018-09-12

申请号：EP18160026.3

申请日：2018-03-05

申请人： National Machinery LLC

发明人： CARPER, Jeffrey, W ,  SNAVELY, Christopher, W

IPC分类号： B21K21/04 ,  B21C23/20 ,  B21C23/21 ,  F42B5/02

摘要： A method and tooling for forming a cartridge case blank comprising backward extruding a tube from a length of wire stock in multiple backward extrusion steps with progressive tooling to obtain an intermediate blank that can be finish drawn without a preceding annealing step and which if otherwise not subjected to multiple backward extrusion steps, would require annealing prior to finish drawing to avoid tearing.

公开(公告)号：EP3372324B1

公开(公告)日：2020-11-18

申请号：EP18160026.3

申请日：2018-03-05

申请人： National Machinery LLC

发明人： CARPER, Jeffrey, W ,  SNAVELY, Christopher, W

IPC分类号： B21K21/04 ,  B21C23/20 ,  B21C23/21 ,  F42B5/02