Static And Dynamic Characteristics Analysis And Toplogy Optimization For Three-coordinate Vibration Deep-hole Drilling Machine

Deep-hole machining has been playing an important role in mechanical machining.Compared with other machining methods,it faces several challenges such as machining difficulty and high cost,which is especially obvious in deep-hole machining of non-rotating components with hole deflection becoming a key issue.Therefore,it's of great importance that new deep-hole machining equipment should be developed.This thesis takes the demands of deep-hole machining of non-rotating components into consideration,adopts vibration drilling and deep-hole machining technology,develops a new three-coordinate vibration deep-hole drilling machine and analyzes static and dynamic characteristics of the machine tool s as to apply topology optimization to key components.This thesis provides a general analysis on the basis theory,characteristics and current issues of deep-hole machining,based on which this thesis applies vibration drilling technology to deep-hole machining system so as to ascertain technical parameter of the machine tool and determines general structure plan.Meanwhile design bases and parameter calculation method of key components are given,thus a new non-rotating three-coordinate vibration deep-hole drilling machine prototype is developed.This thesis sets prototype finite element analysis based on ANSYS Workbench software.Then it analyzes static characteristics of the whole machine tool and key components,thus deformation law and distribution of stress and strain of the whole machine tool are obtained.Through analysis on the changing trend of static stiffness of the deep-hole drilling machine when it is on feed direction in different machining positions and static characteristics of the whole machine tool adpting three different beam structure plans,the best beam plan is obtained.Through Vibration Box static analysis,its stiffness and strength characteristics are obtained,thus the structure plan with relatively low stiffness is found,which can exactly serve as the bases to optimization of the whole machine tool and componentsThe first 6 orders natural frequency of the deep-hope drilling machine and the dynamic characteristics of the natural shape are obtained through modal analysis.The results demonstrate that the prorotype order natural frequency is far away from the excitation frequency of vibration drilling,which avoids Resonance Phenomenon triggered by vibration drilling.Its dynamic characteristics are obtained through the modal analysis of vibration box,therefore its weak links and the structure that needs to be improved can be foundBy using structure topology optimization design theory and method,column and beam has been lightweight designed and the optimized materials distribution table of column and beam is obtained,besides,column and beam has been structurally improved according to its optimized materials distribution table.The results of simulation analysis shows that the static and dynamic characteristics of optimized front and back column are almost the same as before while there is a sharp decrease in weight thus lightweight design of column and beam is realized.