Modeling of cold extrusion processes using kinematic trapezoidal modules
Natalia Hrudkina, Leila Aliieva
Abstract
In this paper, we analyze the features of using an axial trapezoidal module in design schemes with an adjacent lower module of various configurations. As adjacent kinematic modules, a rectangular rigid, longitudinal-transverse flow and a trapezoidal kinematic module with a rectilinear inclined boundary are chosen. It has been established that optimization in relative velocity of metal flow in the backward direction is possible only with a combination of kinematic modules with a radial component of one direction (sign) and impossible in other cases the paper shows practical realization of the authors' approach for the particular case of modeling of the process of combined radial-backward extrusion of the end-capped parts with a flange. The deviation of the theoretically obtained estimates of the force parameters of the process and shaping does not exceed 10 - 15%. Author-proposed computations for the powers of shearing forces can be successfully used for engineering-friendly modeling of more complex processes of the cold combined extrusion with additional taking into account the availability of metal flow in the forward, backward and radial directions.