Numerical Study of Friction at Upset Forging With Radial Extrusion of Parts of Rod With a Thickening-Type of Aluminum Alloy Ad1

Abstract

The authors investigated the effect of contact friction on the flow of a material in combined process with a running a hotbed of deformation. The different ways of defining the boundary conditions of the contact between the deformable material and surfaces of the instrument. Numerical modeling of the process was conducted using software package QFORM, based on the finite element method. The process under consideration is complex. The height of bulges formed at the core of the piece, taken as a control parameter when performing a comparative analysis of the results of computer simulations with experimental results. Investigated is the influence of the friction factor, which determines the height of the bulges, its shape and material flow. The results of computer simulation are compared with experimental results. The authors achieved a good qualitative and quantitative agreement.