Prediction of the structural state in a wheel forging based on computer modeling

Abstract

The landing gear of any flying vehicle is a unit of increased responsibility. The entire load during take-off and landing is perceived by the wheels of the landing gear. The reliability of aircraft wheels is determined, among other things, by the distribution uniformity of the structure and mechanical properties over their volume. This work represents a method for predicting the structural state in stamped forging of an aluminum alloy wheel included in the chassis of a small bomber. Based on the simulation results (deformation temperature and deformation rate), the cause of grain growth in the area of the wheel rim is determined. Using the structural state diagrams of Vainblat Yu M. It is shown that a region with coarse grains in the rim is formed due to local recrystallization during heating for quenching. Based on analysis of temperature-speed conditions in coarse-grained area, stamping modes are proposed with stepwise reduction of deformation rate at the final stage of the process, which excludes recrystallization.