METHOD OF MANUFACTURING BODY CASING FOR CONCRETE AND PIERCING SHELLS Russian patent published in 2018 - IPC F42B12/04 C21D9/16 C21D8/10 B21H3/00 

FIELD: technological processes.

SUBSTANCE: invention relates to the manufacture of billets of casings for concrete and piercing shells using screw rolling mills. By the method, the preform is heated, hot plastic deformation and its mechanical processing. In this case, hot plastic deformation is carried out in rolling twin-roll rolling mills with a shaped profile. Length of one caliber is determined in accordance with the size of the shell of the shell of the projectile with the cylindrical, head and liven parts in the form of semi-ellipsoidal curves. Length of the calibrated portion of the roll is determined from analytical expressions. Preform of the shell body after helical rolling is accumulated in a thermo container, after which it is subjected to machining.

EFFECT: increased productivity of manufacturing blanks, obtained uniform structure of the metal along the entire length of the blanks with the simultaneous formation in the rolls of several blanks.

4 cl, 2 tbl, 3 dwg