Study On Control Technology Of Machining Deformation Of 2124 Aluminum Alloy Thin-walled Structure

Aluminum thin-wall structure has a lot of outstanding advantages. It can reduce the structure weight of the aircraft to improve its mobility and ability to carry the load. But, because of its high removal rate of material, more thin-wall structure and poor rigidity, it is hard to avoid machining deformation.A lot of simulation analysis was conducted in this study to investigate the influence of cutting parameters, tool path, the clamping condition and processing sequence on the machining deformation of aluminum alloy thin-walled structures.The main work and results are summarized as follows:1. Combined with ‘model change' technology, Python language script was writed to define element sets automatically based on Abaqus simulation software. Workpiece material was removed follow the tool path in turn. The modeling efficiency was improved. Milling simulation for aluminum alloy thin walled structure was conducted.2. In order to study the machining deformation of three typical thin-walled local structure, finite element simulation was conducted. Optimum process parameters are obtained by comparing the deformation under different parameters. Several tool paths were selected to study its influence on machining deformation, and the cutting process is further optimized. Cutting experiment was conducted under optimum process condition. The reliability of simulation experiment results is verified.3. The clamping way was determined depend on the structure of the typical thin-walled part. The influence of clamping plan and processing sequences on machining deformation was studied by using simulation analysis method. Optimum clamping plan and processing sequences are obtained. And deformation of thin-walled structure is significantly reduced.