Simulation Research On Machining Deformation Of Non-stretchable Straight Blades Based On ABAQUS

Thin-walled structural parts are widely used in various industrial fields,with the characteristics of light weight and complex structure.During the milling process,due to its low rigidity,it is prone to machining deformation,resulting in reduced dimensional accuracy of the processed surface and affecting the workpiece performance.The impeller is the core component of turbine machinery,and its blade is a typical thin-walled structure.How to improve its machining accuracy has high research value.As a difficult-to-machine material with high rigidity,titanium alloy gradually replaces aluminum alloy and stainless steel as the main body of research at the time when the processing technology is more mature.Its high strength,strong corrosion resistance and light weight make it widely used in aerospace and marine and chemical industry.In this paper,the influence of milling force,cutting parameters,and processing technology on the machining accuracy during the machining process is obtained by using ABAQUS to study the side milling of titanium alloy semi-open impeller blades.The finite element model analysis of the blade is carried out by two methods:three-dimensional dynamic simulation and three-dimensional static simulation.In this paper,the impeller is first modeled,and the spline curve of MATLAB modeling impeller was imported into UG for digital modeling.The shape of the suction surface and pressure surface was obtained through the blade neutral surface and the thickness of the blade,and the generated entity lays the foundation for subsequent simulation research in ABAQUS.After that,establish a milling model to explore the change of milling force of titanium alloy and the influence of milling parameters.Using UG to model the short segment of the milling cutter and import it into ABAQUS,using the dynamic simulation of thermal and mechanical coupling method,through the study of the milling of the titanium alloy block,the instantaneous milling state of the milling force under the milling state was obtained,and the influence of milling parameters on milling force were analyzed.Using MATLAB to fit the experimental data in reference to meet the experimental data required for this study,the experience formula of side milling was fitted.Using static simulation method to analyze the blade error of the impeller blade.The equivalent milling force is loaded by the life and death element method to simulate the milling process,explorethe local elastic deformation of milled thin-walled parts when performing multiple-layer milling of impeller blades,explore the effect of different milling sequences on yielding of complex thin-walled structural parts.Finally,through the method of dynamic thermal-mechanical simulation,the simulation method of ball-end milling cutters with irregular path point milling of complex thin-walled parts in three-dimensional space is realized.The difference spline is used to discretize the spline into multiple points in the UG,the spline offset method is used to obtain the posture of the tool at different positions,and the method of controlling the amplitude is used to realize the complex movement of the tool in space.Compare differences between dynamic simulation Similarities and static simulation.