Study On Process Of Beam Frame Of Aeroelastic Model Based On Deformation Analysis

As a major power transmission component of wing flutter model, processing qualityof beams affects flight test data’s accuracy directly in the wind tunnel tests. Because of itslarge size, complex structure, removal efficiency, the structural characteristics of highprecision machining requirements and weak stiffness, it is difficult to control deformationand precision of beams in milling process. Therefore, researched on its processingdeformation has great significance for the improvement of manufacturing precision.Firstly, the structure of the wing flutter model assembly is introduced. Based onmachining distortion and symmetrical structure of beams, starting from the machiningprocess, hierarchical processing asymmetric processing and many other methods are usedin controlling deformation of beams. The deformation of the beam is mainly due toresidual stress after the beam is completed. According to the material properties, structuralcharacteristics and processability of the beams, the dynamic process of milling is simulatedby the finite element simulation to select the right method for milling process, whichpredicts deformation of the workpiece and provides guidance for developing processingtechnology.Secondly, the material properties and processability of parts are analyzed and studied,cutting tools and cutting parameters are calculated and selected. The whole process ofbeams is divided into milling and wire cutting. Reasonable heat treatment process isarranged, NC program is prepared in UG and processing schematic is listed. A reasonablebeam processing is developed by finite element result and simulation. Due to the instabilityof processing, the processing result of each process should be detected and parameter ofprocess is adjusted.Three-dimensional software modeling, machining theoretical analysis, finite elementsimulation and a combination of methods are used, which is to reduce the beam machiningdistortion and to focus on analysis and research of milling residual stress. A processscheme which is applied in controlling beam processing deformation is developed. At the same time, the design provides some theoretical guidance and technical reference bypredicting the deformation of large thin-walled workpieces.