Simulation And Experiment Of Machining Deformation Of Aluminum Alloy Thin-wall Frame Parts

Aluminum alloy materials are widely used in machinery manufacturing,aerospace and other fields because of their superior properties.With the gradual improvement of material performance requirements in these fields,the preparation process of aluminum alloy materials has been receiving much attention.Due to the influence of initial stress and machining stress of the blank,the thin-walled components of aluminum alloy thick plates are easily deformed after milling,which will affect the service performance of the components.Therefore,it is practical to carry out research on the deformation of aluminum alloy thin-walled components.In this paper,based on MSC.MARC nonlinear finite element simulation software,the 7075 aluminum alloy thick plate quenching-milling process was simulated and modeled and experimentally studied.The stress field and deformation characteristics of the thick plate-thin wall parts were analyzed and discussed.The specific work is as follows:1.The thermal temperature field-internal stress field finite element model of 7075 aluminum alloy thick plate was established by MSC.MARC software,and the stress field distribution of aluminum alloy thick plate quenching was obtained.Simulation calculation provides theoretical support.2.A model loading method based on simulation-experiment matching is proposed,that is,by subdividing the frame element to mill the surface unit and applying the surface distribution force layer by layer,the machining surface stress is introduced into the milling machining model to complete the thin-walled frame member model.3.By means of milling simulation calculations and stress test experiments,a simulation and experimental verification of the machining stress and machining deformation of thin-walled parts of different shapes are carried out.According to the law of deformation analysis of thin-walled frame parts,measures to prevent machining deformation of components are proposed.