Research On Thermal Structure Coupling Simulation Analysis Of TX1600G Machining Center

The thermal error is the most important factor affecting the machining accuracy of high-speed,high-precision machining centers.The thermal deformation of the machining center affects the cutting capacity and machining quality of the machining center.Therefore,it is a difficult problem in the design process to research the thermal characteristics of the machining center and obtain its thermal deformation regular to accurately predict the thermal error of the machining center.It is also a hot issue in the research field of high-speed machine tools.Accurately predicting the thermal error of the machining center is of great significance to layout design of the heat source and reasonable optimization of the structure.In this thesis,the TX1600G machining center boring machine system was taken as the research object,and the thermal deformation amount was taken as the goal.The thermal structure coupling simulation analysis was carried out by COMSOL Multiphysics software,and the design experiment was carried out for comparative study.Firstly,based on the theory of heat transfer,the basic heat transfer between materials with different thermal conductivity was theoretically explained and analyzed.Combined with its structure,the heat source distribution and heat transfer mode of the TX1600G machining center boring machine system were analyzed,and the heat generation of the main heat source of the boring system,the heat flux between the structures and the heat transfer coefficient between the structure and the medium were calculated.The 3D solid modeling of the machining center boring machine system was carried out by using SolidWorks software,and the dimensions,material parameters and degrees of freedom of the 3D model were set according to the design parameters.It was connected with COMSOL Multiphysics software to set thermal boundary conditions for thermal structure coupling simulation analysis.Through the simulation,the temperature variation regular of the system and the deformation amount when the system reaches the thermal equilibrium state were obtained.Then,the infrared thermal imager and the API spindle analyzer were used to perform the temperature field detection and the thermal error detection corresponding to the simulation.Finally,the simulation results were compared with the experimental results.The results obtained by the thermal structure coupling simulation of the TX1600G machining center boring machine system using COMSOL Multiphysics software were consistent with the experimental results,thus verifying the correctness of the simulation.The research results of this paper are of great significance in the rapid analysis and evaluation of thermal characteristics and thermal errors in the design stage of the machining center.The thermal structure coupling simulation analysis of the machining center can be carried out by using the COMSOL Multiphysics software.It can be used to predict the thermal error in the machining center design process and provide a theoretical basis for the compensation design of the machining center.