METHOD FOR MANUFACTURE OF FLANGES ON SURFACE OF AMMUNITION CASE Russian patent published in 2003 - IPC

FIELD: method for manufacture of cluster ammunition. SUBSTANCE: in manufacture of flanges on the surface of the ammunition case having the shape of a rhomb, axially oriented and equally distributed on the inner surface, the flanges are formed by application of multi-turn helical grooves of opposite direction by means of successive reduction of cylindrical semifinished item of the case that is forced through two dies of a different diameter on mandrels, each of them has multi-turn helical flanges of the same direction, after that the bottom part of the semifinished item is staged to the tapered profile of the case. EFFECT: enhanced adaptability to manufacture of rhombic localizers on the ammunition case. 5 dwg, 1 tbl