Research On Simulation And Control Technology Of Machining Deformation Of Large Complicated Thin - Wall Structure

Research on the thin walled parts can greatly increase the application performance of theproduct with the development of aerospace products. But this kind of parts with complexshape structure, external coordination requirements, the outline of the part withrelatively large sectional dimension, the removal amount of processing materials, theoverall poor rigidity, the rebound for cutter and machining vibration phenomenon of workpiece is very obvious during machining process. This is a direct result of processing quality isdifficult to guarantee and the processing efficiency is very difficult to improve after thecompletion of the parts. This has greatly affected the competitiveness of the products and theeconomic benefit of enterprise. Therefore, it has important theoretical significance andengineering practical value to deformation simulation and control technology of thin wallparts.This study summarizes the prediction and control technology of themachining deformation of thin-walled parts, analysis of thin-walled parts in theprocessing of deformation prediction and control technology of the machining deformationwith the development of Aerospace Thin-walled Parts in the design of the background. Tomake a comprehensive analysis of the physical properties, mechanical structure andmechanical technology etc, And put the saddle tank structure as the research model fromthe Aerospace Science and Industry Department,UG NX8.0 is used to create the model ofthin-walled structure components, finally carries on the thorough research according tothe comprehensive analysis of the results.We are able to get a dynamic process of cutting parameters on cutting force change in theprocess of cutting from the simulation analysis of Deform-3D finite element simulationsoftware; The model of thin-walled structure is simplified and let it do not affect theoverall effect analysis. Then using the finite element analysis softwareANSYS-Workbench modal analysis method to find the parts of the stiffness ratio of theweakest position,Finally, the machining deformation state of change and stress distribution isobtained by the harmonic response analysis method for the selection of different frequencyprocessing. The machining deformation trend was summarized in the clamping and the freestating to provide support and basis for control technology of machining deformation.Research on Simulation Based on ANSYS-Workbench, in the mastery of the thin-walledstructure deformation, the necessary means of deformation control technology should beadopted. Such as: Application of new equipment in the processing of materials, theimprovement and optimization of processing technology. The control method is adopted inthis paper are: The optimization of cutting parameters(including the single factorexperimental design and orthogonal test design),Tool path optimization,“pre – deformation”design. To verify the effectiveness of the control technology for thin walled structure throughthe test and application of deformation control design.