Numerical Modeling of the Material Layer Upset Forging with Extrusion Under the Stiffening Rib into the Forging Cavity

摘要

An array of input data is formed and boundary conditions defined for carrying out numerical experiments on the material layer for upset forging into a forging cavity under the stiffening rib. Numerical experimentation is applied to plane upset forging of a blank from an initial body width of h_o = 16.13 mm to a finite width of h_4 = 12.5 mm in four stages. Calculations are made for each of the four steps with a decrease in body thickness at the first step of 0.63 mm; and a decrease of 1 mm thickness at the second, third, and fourth steps. At the same time, a cavity width under a stiffening rib was accepted by equal finite thickness of forging body, cavity conjugate radius with deformed plane of forging was 15 mm. The stiffening rib finite calculation height was 30 mm. During the research we quantitatively estimated stress changes and the deformation ratio in fibers external to forging. Calculation results were displayed in the form of distortion of finite-elementary grids and isolines pictures that considered sizes in the blank material, and also the stress distribution in externally forged fibers.