Temperature Field And Stress Field Analysis Of Turnable Milling And Groove Reconstruction

Theory analysis and experiment study of temperature field and stress field of turnable milling insert are mainly completed in the paper. On the basis of experiment study of temperature field and stress field of turnable milling insert, finite element analysis and coupling field analysis are implemented. In terms of unstable characteristics of temperature field and stress field of turnable milling insert a fuzzy synthesis judge system of wave edge milling insert is developed. Groove reconstruction is carried out based on temperature field analysis and temperature field evaluation guidelines.The research work comes from a project funded by NSFC (National Natural Science Foundation of China), which is "The research on self organization optimize design of milling insert with 3DM complex groove". After development status of tool technology and evolution survey of milling insert over the world, and still overview milling mechanism of milling insert, tool development and design technology and groove CAD/CAM technology.Firstly the experiment study of temperature field and stress field of turnable milling insert is implemented. Milling temperature and milling force of smooth front and wave edge milling insert is synchronously measured by applying dynamic data acquisition system. The temperature values of every measured point on milling insert are acquired and still experiment equation between average temperature of edge-chip contact area in front tool surface and time. The value collected carry through data fitting by MATLAB software and the experiment equations of X, Y, Z three directions milling forces and time for wave edge and smooth edge milling insert are obtained. From the experiment we compare milling temperature and milling force of two kinds of grooves milling. The equations gained between temperature and force and time are foundation for deriving heated density function, force density function and the finite element analyses of temperature field and stress field.Secondly the finite element analysis and coupling field of temperature field and stress field of turnable milling insert is studied. Based on heat transfer theory heated density function of milling insert is built up by using heat source method. So heated density function model and surface heated density function are gained when any groove parameters known of milling insert. The solid model of milling insert is meshed finite element and the boundary condition of temperature field is determined. The finite element analysis of temperature field is carried out. The experiments of milling insert with five sorts groove is completed when cutting parameters are different. The surface force density functions are set up for smooth front edge and wave edge milling insert. The wave parameters design concept of wave edge milling insert and curve and curved surface fitting of force density function are given. The finite element analysis of stress field in any the time during cutting process is implemented. The stress distribution rule and distortion of wave edge and smooth front edge milling are got. By multi-coupling field analysis function of finite element analysis software ANSYS heat stress analysis of wave edge and smooth front edge milling are given for the analysis results of temperature field as body load. The distribution rule of heat stress and displacement are obtained. On the basis of heat stress calculation the coupling between heat stress and mechanical stress is analyzed. We gain synthesis result of temperature field and stress field coupling each other. By comparing the finite element calculation results to experiment results of heat and force coupling physics field of smooth front edge and wave edge milling, cutting capability suoeriority of milling with groove is explained from coupling field.Thirdly the forecast and fuzzy judgement of temperature field and stress field of turnable milling is studied. According to nonstable performances of temperature field and stress field of milling, based on man nerve network thoery the forecast model of emperature field and stress field milling with 3DM complex groove is established by using Levenberg-Marquardt algorithm of BP nerve network. By employing fuzzy mathematics theory, in terms of machining requirements and specialist analysis fuzzy synthesis judgement system for wave edge milling is developed in VC++ environment. By using the system qualities of temperature field, stress field and coupling field in multiple factors action judged. It provides evaluation basis for optimization of milling groove parameters.Lastly groove reconstruction design of turnable milling insert is carried out. The groove reconstruction is mainly based on temperature field analysis and temperiture field judgement guideline. Multiple object optimization mathematical model of groove parameters is set up. Applying genetics algorithm solves optimizing groove parameters of changeless cutting parameters and given constraint. The milling coupling field after groove optimizing has markedly superiority over others. In Pro/E environment the solid model of wave edge milling insert is found. By using Pro/TOOLKIT secondary exploitation tool, groove parameters reconstruction system is developed by employing asynchronism mode. The key technology is fulfill by using friendly graph user interface inputs groove design parameters to control complex groove generation of milling insert.