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Research on Control Residual Stresses Mannel of Aeronautic Frame Structure in the Milling

Author: KeLieQiang
Tutor: WangLiTao
School: Anhui University of Engineering
Course: Materials Science and Engineering
Keywords: Aerospace monolithic components Milling distortion Processing of residual stress Finite Element Simulation Material models Tool path
CLC: TG54
Type: Master's thesis
Year: 2010
Downloads: 117
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Abstract


The deformation of the overall structure of the piece CNC machining is one of the most outstanding problems facing the aviation industry , a serious impediment to the process of the development of the aviation industry . Study affect the overall structure of machining distortion factors and to reduce or suppress parts machining deformation process , forecast and control of aerospace monolithic components CNC machining distortion has a very important value and significance . Text is divided into six chapters , each chapter are summarized as follows: The first chapter describes the background and significance of the thesis summarizes the research status of aerospace monolithic components CNC machining distortion , the content and the overall framework of this thesis . The second and third chapters elaborate on the theoretical basis of the aerospace monolithic components machining distortion , theoretical analysis , simulation and experimental study of the finite element method of combining . Numerical simulation of key technologies to start cutting mechanism from the three-dimensional the machining deformation characteristics and the overall structure of the piece , aerospace monolithic components milling deformation depth research . Monolithic components for aero frame milling deformation finite element model , and in-depth study of the required modeling key technologies , including model simplification , material removal , cutting layer to simplify and cutting load is applied . Chapter IV using the finite element method, a combination of simulation and experimental study for the overall milling deformation mechanism of the structural parts of the aviation multi- frame , forecasting methods , as well as changes in the law to carry out in-depth research , for the control of such components deformation laid foundation. The use of three-dimensional elastic-plastic finite element analysis of the tool path and the processing order of the residual stress distribution and deformation of milling , four typical tool path , as well as frame milling sequence of machining distortion trend . Chapter combination of actual structural components of the small size of the high-speed milling trials using coordinate measuring instrument to measure the deformation of the workpiece machining , simulation results and comparison of test results by processing deformation analysis to verify the processing deformation finite element analysis model created effectiveness. Chapter VI of the content of this thesis are summarized and further research work prospects .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal cutting and machine tools > Milling and milling machine
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