Structural Analysis And Optimization Of Boring System For Compound Boring And Milling Machining Center

Manufacturing industry is a pillar industry of a country,is the key to determine the level of productivity,and plays a very important role in the economic development of a country.In the face of increasingly fierce global market competition,all enterprises aim to improve product quality,reduce production costs,accelerate the development of new products,and meet the growing new needs of customers.They constantly adopt new technologies,new processes and new production models to improve their adaptability to the changing global market.In this paper,the boring system of TX1600 G precision compound boring and milling machining center is taken as the research object.According to the actual load situation of the column,several loads causing the column deformation are specifically solved,and the corresponding analysis is made.The root cause of the column deformation is determined,and the goal of column structure optimization is clarified.Static analysis and modal analysis of the column are carried out through the Simulation module of Solid Works finite element software.The deformation diagram of the column under several typical boring working conditions and the first four natural frequencies of the column are obtained,and the results are summarized to determine the working condition with the largest deformation of the column and the mode order that affects the stability of the column structure.By comparing several common topology optimization methods,the variable density method is selected for multi-objective topology optimization of the beam structure.The SIMP interpolation model is selected from the two interpolation models and interpolated to improve the clarity of the optimization results.Combining the eclectic programming method,the two sub objectives are integrated,and the mathematical model of multi-objective topology optimization is obtained.Then,the weight coefficient of each sub objective is determined by the efficiency coefficient method.The sorted mathematical model is imported into the Optimistuct module in Hyper Works to optimize the multi-objective topology of the column structure.By comparing the performance parameters of the column before and after optimization,the effectiveness of this method to solve the multi-objective optimization problem is proved.The shape and size of the column structure after topology optimization are optimized.By comparing the structural performance parameters before and after optimization,it is found that the quality of the final structure of the column is significantly reduced compared with the original structure,saving the manufacturing cost of the column;Under dangerous conditions,the maximum deformation is reduced by 25.1%,which improves the stiffness of the structure;The natural frequency of the first order natural frequency is55% higher than that of the original structure,which ensures the stability of the column and maximizes the processing accuracy and structural stability of the column on the premise of meeting the processing technology.Based on the finite element model of the column,the modal analysis is carried out.The location of the modal strain energy concentration under the first-order mode is selected,and the sensitivity analysis method is introduced to optimize the design size of the column.The optimization results show that the first order modal strain energy distribution is uniform after optimization,which reduces the bed mass,reduces the blindness of structural optimization,and improves the optimization efficiency.