Abstract
When the thin-walled parts are machined, they need to be clamped and positioned. By using finite element method (FEM), the deformation law of workpiece clamping caused by single clamping layout parameter can be gained. However, it is impossible to express the relationship between the clamping deformation and the clamping layout parameter by FEM when multiple clamping layout parameters are taken into account simultaneously. Therefore, ABAQUS is used to establish a three-dimensional finite element model for the clamping layout of thin-walled part. And by combining the milling force and the static balance equation, the appropriate clamping force value can be obtained. Then it is convenient to obtain the initial data sample of genetic algorithm. Genetic algorithm is used to optimize the clamping layout of frame type of thin-walled part and obtains the optimal layout. The minimum value of maximum clamping deformation is 15.50 µm. In the field of thin-walled part machining, the research results of this paper have an important guiding role in the rational design of the clamping layout scheme.
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