Flutter Pattern Study, Based On A Deep Cavity Milling Shell

In aviation connecctor shell,mostly deep-cavity thin-walled structure andshape of complex。In addition to the installation of sophisticated electronicdevices and integrated circuits inside the shell,but also play a protective role ofthe connector,and can pass the evil strong environment to ensure that energyand signal；Thus,the dimensional accuracy of the shell pieces,geometrictolerance and surface quality requirements will be high。However, deep cavitymilling chatter pattern in thin-walled shell pieces to become a problem of thehigh reliability of the air connector。This thesis is to connect the devicecommonly used in aluminum alloy with deep cavity and thin-walled shell objectof study, theoretical analysis on the shell pieces cutting chatter in millingpattern, the software simulation and experimental validation。The specificcontent of the work are as follows：1. Analysis and summary of cutting chatter/flutter pattern generatingmechanism,factors,characteristics,vertical milling objects,the use of theanalytical method to establish the two degree of freedom milling system staticand dynamic model and flutter stability region analysis algorithm。2. Cutting force coefficients and the MATLAB modal simulation testsystem dynamic performance parameters by the cutting force identification testby hammering experimental frequency response functions in the MATLAB/Simulink–Cut simulation cutting system stability limit diagram, Analysis ofcutting parameters(Spindle speed,Axial depth of cut,Radial depth of cut,Feed rate),Milling chatter/flutter pattern of the impact of the law, andaccordingly put forward the inhibit cutting flutter pattern measures；In the actualcutting experiments to compare, analyze and verify。3. BT40shank tool assembly of UG three-dimensional model,UG NXfinite element analysis module to analyze reconciliation counted in a speedshank tool assembly able to withstand the maximum load；or tool in the loadbearingthe maximum deformation limit, the tool shank mounted accessoriesallow the maximum spindle speed。Solver changes in the parameters of the different tool overhang system dynamic performance analysis tool overhangLength on the pattern of cutting chatter law,and propose effective countermea-sures。...