| 摘要 |
A process for the manufacture of a tubular metal container or vessel, such as a shell or cartridge case, in which an open-ended hollow metal tube (10) is mounted on a mandrel (12), and in which the mandrel (12) and a forming punch (17) are moved relative to one another in a die (21) such that the metal at one end of the tube (10) is displaced inwardly from around the circumference of the tube to form a central hole at the said end of the tube, the displaced metal being formed with an external recess or pocket communicating with the said hole. |
