Optimization Design Of Key Components Of Complex Box Composite Precision Boring And Milling Machining Center

Precision smart composite boring and milling machining center is a foundation equipment for the equipment manufacturing industry,a very important position in many areas,especially for the processing of complex box parts in military equipment.Its manufacturing precision and efficiency directly affect the quality and cost of the final product.And the key functional components of the machining center can directly affect the accuracy and efficiency of the terminal product.This paper is supported by the National 863 plan key projects.Author synthetically analyze domestic and foreign relevant advanced technology and design experience,effectively improved the machining precision and efficiency of the boring and milling machining center through the structure optimization of key function parts design and error compensation.Author take sliding pillow for boring system of the TX-1600 G boring milling machining center as the research object.It is complete that static and dynamic characteristics analysis about the sliding pillow under various working conditions,that provide data basis for subsequent optimization.Author comprehensive consideration of manufacturing processes and other factors to complete the multi-objective topology optimization design that based on SIMP method,and the compromise programming method and effect function method,take strain energy and modal characteristic value as the design response of comprehensive objective function,take structural volume fraction and geometry size as the main constraint conditions.On this basis,Author choose a plan of double X stiffened plates,through the finite element analysis,to further strengthen resistance to deformation ability of the sliding pillow.Through comparison and analysis,the deformation of the sliding pillow is greatly reduced,the lowest natural frequency is significantly increased,and the weight is reduced,which effectively improves the machining accuracy and efficiency,and reduces the cost of the material.Author take the new sliding pillow structure with topology optimization as the research object,in order to minimize the maximum strain energy density of each node of the sliding pillow,take the volume fraction as the constraint condition,complete the shape optimization design that is in order to improve the stress distribution of the boring shaft,increase the material utilization ratio,reduce the stress concentration and improvethe long-term reliability of the machining precision.finally,this optimization design achieve the desired objectives.In order to further improve machining center boring machining accuracy,this article take "hydraulic-rod" compensation method to reduce the flexure deformation error of sliding pillow.The flexural deformation law is obtained through the finite element analysis.Author according to the related theory to calculate compensation force value,finally,get the curve about compensated force and sliding pillow journey according to the finite element analysis technique and the method of least squares.The analysis indicates that the "hydraulic-rod" compensation method can effectively reduce boring processing error.Author take boring and milling machining center The spindle sliding table as the research object,based on the variable density method,take strain energy and modal characteristic value as the objective of optimization and the structure volume as the main constraint condition,comprehensive consideration of other factors such as manufacturing process,complete the topology optimization design that is in order to improve the processing accuracy and efficiency of machining center.finally,this optimization design achieve the desired objectives.