Computer-Aided Modeling of Artillery Shell and Cartridge Case Drawing.

摘要

Mathematical models which simulate the drawing of artillery shell with a moving mandrel were developed and computerized. The models are applicable to conventional, tapered dies; or to curved, streamlined die profiles. Studies on the effects of important process variables (temperature, friction, punch speed, material) on the drawability of a 105 mm shell were performed, and die design charts prepared. A new optimal die profile, which requires less energy from the forming press, was designed. It was also established that a maximum areal reduction of about 40% was an upper bound for cold drawing. Limitations of the simulation procedure were identified. Recommendations for corroborative experimental work and for future modeling efforts were made. (Author)