| With the rapid development of science and technology,the machinery manufacturing industry continues to introduce new technologies.High-speed CNC machining technology is ushering in the era of the best reform and development.The popularity of high-speed CNC machining technology in the manufacturing and processing industry must be based on a high-efficiency,high-precision composite CNC machining center.As one of the key core components of the CNC machining center,the reliability and stability of its performance directly affect the processing efficiency of the manufacturing industry and the economic benefits of the machining manufacturing industry.Therefore,the analysis of the static and dynamic performance of the electric spindle system and the optimized design of its structure now have a bearing on the high-speed CNC machining technology.In this paper,the electric spindle system of high-speed CNC machining center is taken as the research object,and the main mechanism(electric spindle,bearing)in the electric spindle system is theoretically explained.Further understanding of the basic structure of electric spindle is made on the electric spindle.The theoretical analysis,and its three-dimensional modeling and finite element simulation,and then through the simulation data and finite element analysis to solve the results,and finally through the optimization of the electric spindle design targeted improvement of the electric spindle,improved the electric spindle The relevant performance.The main content of this article is as follows:Firstly,according to the relevant numerical dimensions of the electric spindle of the CNC machining center,the structure analysis of the electric spindle system is carried out,and the installation preloading method and lubrication cooling system of the related supporting bearing are introduced.The computer-aided design software and ANSYS workbench software were used to build the platform,and the three-dimensional solid model and finite element model of the electric spindle unit were established respectively,which laid the foundation for the smooth development of the subsequent analysis of the electric spindle.Secondly,the static calculation of the electric spindle unit gives the main load and the corresponding displacement of the electric spindle.On this basis,the finite element analysis software is used to mesh the electric spindle and apply loads simultaneously.Static analysis,calculated by the shaft axis of the maximum displacement and maximum displacement of the corresponding cloud map.Afterwards,the modal analysis of the electric spindle system under the unconstrained free state and the two different constraints was performed.The natural frequency and the corresponding vibration-type cloud diagram of the electric spindle were obtained under three different conditions.Based on the modal analysis of the electric spindle,the harmonic response analysis of the front end of the electric spindle was conducted to further understand the dynamic performance of the electric spindle and pave the way for the later optimization design.Finally,through the data obtained by software analysis of the motor spindle performance,and the establishment of the parameter model of the electric spindle system,the installation position of the supporting bearing on the electric spindle is adjusted and optimized,and then the iterative calculation of the data parameters is performed through the optimization software.The parameters of its span are further checked.The ultimate goal is to find the best bearing span distance through optimization,and to improve the performance parameters of the electric spindle so that its performance can meet higher production requirements. |
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