| 摘要 |
A tubular shell for artillery projectiles, which can be used as a carrier for an internal canister, or load, of an illuminating or smoke producing or deflagrating type, the ejection from the projectile and the operation of which are activated by known pyrotechnic and mechanical devices. In order to make possible to reduce the thickness and weight of the tubular shell to the minimum value compatible with the stresses due both to starting accelerations of the projectile and to internal pressures generated by a suitable splitting-up charge, the tubular shell (1) of the projectile according to the present invention is made of a single part instead of being divided in two or more parts as in the prior art, and it is internally undercut by means of flask boring machining, so as to provide an internal shoulder (4) at the end of the internal undercut facing the end plug and an internal shoulder (5) at the end facing the nose. The internal undercut is filled by a cylindrical insert (2) of a material which is lighter than that of the tubular shell (1) and the introduction and fitting of which into the tubular shell (1) is made possible in that the insert (2) is subdivided by longitudinal cuts into sectors (2a, b, c, d) which are embedded and fixed between said internal shoulder (4, 5). |
