The Thermal Analysis And Experiment Research For The Feed Driven System Of TX1600G Machining Center

In an era of rapid development,high efficient industrial requirements have driven machine tools to be developed with high precision and speed.As a widely used high efficiency of automated machine tools,the machining center has higher requirements on its processing precision,processing efficiency and intelligent upgrading.The continuous work of the machine makes the moving element generate heat.The heat makes all kinds of structural elements of the machine tool expand and eventually leads to deformation and affects the machining accuracy.Such error is called thermal error,which is an important part of the total machine error.There are many reasons for the error,in which the thermal error is one of-the most influential factors to the machining accuracy.And the feed system is a key component of the machining center.Therefore,the study of the thermal characteristics of the feed system can provide reference and support for further temperature control and thermal error compensation.And then the final goal of controlling thermal error and improving machining accuracy is achieved.The purpose of this thesis was to simulate and experimentally study the thermal characteristics of the TX1600G feed system.The distribution of the temperature field was obtained through simulation and then the temperature measurement point arrangement in the experiment was determined.The thermal error of the feed system was measured by laser interferometer,the thermal deformation law of the feed system was found out,and the accurate temperature and thermal error data were obtained by experiment,which provided accurate data support for the subsequent thermal en4or compensation.This paper first analyzed the research results and development trends of the feed system thermal error at home and abroad,and then determines the research methods.According to the overall structure of TX1600G and the relevant parameters of its feed system,based on the theory of feed system heat conduction,ANASYS software was applied to analyze the thermal characteristics of the feed system.Then,the feed system model was simplified by SolidWorks software and imported into ANASYS.The temperature field distribution and thermal deformation of the feed system were obtained by setting and applying the relevant parameters such as boundary conditions and constraints,the location of the heat key points and the maximum direction of thermal eeformation.The temperature and thermal error acquisition scheme of feed system was designed.According to the simulation results,the temperature sensor was arranged and the thermal error was measured by laser interferometer.The experimental results and the simulation results are basically the same,which verifies the variation of thermal error under the floating mode with one end fixed.To sum up,in this thesis,the thermal characteristics of the feed system of TX1600G Machine center were investigated.Taking the feed system of the TX1600G boring and milling machining center as the research object,the temperature field and thermal deformation of the feed system were analyzed,and the heat of the feed system and maximum direction of thermal deformation were determined.The research in this thesis shows that the control of the axial thermal error of the feed system can effectively improve the machining accuracy.The measured temperature and thermal error data control can provide accurate data support for the subsequent thermal error compensation.