ANALYTICAL MODELING OF SINTER FORGING AT HIGH SPEED CONSIDERING VARIOUS FRICTION CONDITIONS

This study investigates the influence of die velocity in sinter forging, particularly focusing on plastic deformation characteristics in the cold forging of axially symmetric components. Key factors such as material flow, inertia energy dissipation, and die load are examined. Results show that both energy dissipation and die load increase with higher die speeds. Utilizing an upper-bound approach with a simplified velocity field, theoretical results for the average die load are established. This analysis aims to improve the understanding of dynamic effects in sinter-forging cylindrical preforms, offering valuable insights for future research in this domain. Additionally, this paper provides a comprehensive review of the role of friction in metal forming processes, emphasizing the development of theoretical models to analyze tool-workpiece interfaces under varying friction conditions using the upper-bound method. The importance of understanding friction, particularly in forging processes, is highlighted. A composite friction mechanism in axisymmetric forging is introduced, accounting for the effect of platen speed. The significance of friction conditions on key factors such as applied load and plastic deformation is underscored, particularly considering the crucial interaction between adhesion and sliding.