Accession Number : AD0281710

Title :   SPINNING THIN-WALL SECOND-STAGE MINUTEMAN NOZZLE THROAT INSERTS OF UNALLOYED TUNGSTEN,

Corporate Author : AEROJET-GENERAL CORP SACRAMENTO CALIF

Personal Author(s) : Banta,F. L.

Report Date : 31 JUL 1962

Pagination or Media Count : 18

Abstract : The feasibility of fabricating full-scale second-stage Minuteman nozzle throat inserts of unalloyed W by a combination of shear and conventional spinning was investigated. Replacing the present forged-and-machined nozzle throat insert with a spun thin-wall insert would significantly reduce nozzle weight. Thin wall (0.060-in.-thick) convergent-divergent nozzle throat inserts were successfully fabricated from 0.250-in.-thick unalloyed W plate by a combination of shear and conventional spinning. Tungsten plates were shear-spun into 60-degree-included-angle cones with a wall-thickness reduction of 50%. These cones were then spun to an included angle of 30 degrees; wall-thickness reduction was again 50%, for a total reduction of 75%. The 30-degree cones were conventionally spun to an 8-degree included angle and then to a convergent-divergent configuration conforming to the second-stage Minuteman nozzle throat-insert design. (Author)

Descriptors :   *HYDROFORMING (MECHANICAL), *ROCKET NOZZLES, *TUNGSTEN, FEASIBILITY STUDIES, MANUFACTURING, METAL PLATES, MICROSTRUCTURE, PRODUCTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE