Optimization Analysis Of Thermal Performance Of High Speed Spindle

With the rapid development of high-speed CNC machine tools,high-speed electric spindle machining technology is developing in the direction of high efficiency and high precision.It has been found that the high-speed CNC machine tools in the past have been unable to meet the high-efficiency and high-precision machining requirements of the current products.One of the reasons is that the high-speed electric spindle on the machine tool has thermal deformation,which largely determines the entire CNC.The machining accuracy and service life of the machine tool,for this reason,the optimization of the thermal structure performance of the high-speed electric spindle has gradually become the focus of research in various research institutes.Based on the analysis of the structure of high-speed electric spindles,this paper analyzes the technical parameters of traditional electric spindles.Based on this,the paper studies various factors affecting the thermal deformation of high-speed electric spindles and their corresponding improvement measures.as follows:(1)Analyzed the importance of high-speed electric spindle technology in modern processing and manufacturing,as well as the development status and existing problems.At the same time,the structural characteristics of the high-speed electric spindle are analyzed,and the main heat source and conduction mode inside the high-speed electric spindle are determined.(2)The formation and type of heat source and its internal and external convective heat transfer are analyzed and analyzed.Based on the theory of heat transfer and thermal analysis of rolling bearing,the calculation formulas of heat source and convection heat transfer of high-speed electric spindle are derived.(3)The finite element modeling of the high-speed electric spindle was carried out.The finite element analysis and calculation were carried out to obtain the temperature field distribution of the high-speed electric spindle.The influence of the cooling system on the temperature field of the electric spindle was obtained.(4)Through the coupling analysis of the temperature field and the structure field ofthe high-speed electric spindle,the distribution law of thermal stress and thermal deformation of the electric spindle generated by the temperature field during the normal working process of the electric spindle is obtained.(5)Based on the integration of several factors affecting the thermal deformation of high-speed electric spindle,the finite element optimization analysis of the cooling system in the high-speed electric spindle is carried out,and the thermal stress distribution and thermal deformation of the high-speed electric spindle before and after optimization are carried out.A comparative study.Finally,based on the analysis of the completed work,based on the results of this research,the ideas and methods for the next research work are proposed.