Simulation Analysis And Active Control Method For Thermal Characteristics Of Machine Tool Structure Under Multi-heat Source

With the rapid development of the manufacturing industry,the advancement of precision machining technology has become very important,and high-precision machine tools are an important guarantee for precision machining.The thermal deformation of machine tool structure is one of the main factors affecting the precision of precision machine tools.At present,there are few researches on the active control method of machine tool structure thermal deformation,which makes it difficult to solve the problem of effective suppression or active control of thermal deformation of machine tools.Considering the above problems comprehensively,based on the multiloop differential active temperature control system,the active temperature control device is used to actively control the thermal deformation of the machine tool structure.And the ANSYS thermal characteristics simulation and experimental results were compared to optimize the thermal deformation active control method.The main work is as follows:Using ANSYS thermal characteristic simulation analysis,the deformation law of machine tool structure thermal deformation under the influence of internal heat source and external heat source is studied.According to the arrangement method and temperature regulation of active temperature control device,the best active temperature control strategy is summarized by comparing and analyzing the simulation results of various working conditions.Then,based on the active temperature control device,consider the superposition effect of the machine tool structure thermal deformation under the influence of the single heat source and multiple heat sources.Compared with the active control of multiple structures,the active temperature control device has a better active temperature control effect for the active control of single structure thermal deformation.At the same time,because the machine tool structure is complex,the active temperature control device can only be arranged on the bed and the column in a limited manner.Even so,the heat transfer device also has a certain influence on the deformation of the table and the slide plate through heat transfer.Taking into account the above effects,with the help of ANSYS thermal simulation analysis,the thermal deformation superposition relationship of single structure and multiple structures is analyzed under the action of active temperature control,and the thermal error model of the machine structure is established according to the summarized structural thermal deformation law.Finally,the experimental platform is built,the thermal error measurement of the machine tool and the spatial error measurement experiment are completed.And by comparing the spatial error model before and after active control,the effect of active control on the machine space error is obtained.This study further studied the active control method of thermal deformation of precision machine tools and continuously optimized the active temperature control method to improve the structural thermal stability of the machine tool during the operation phase.And to a certain extent,it is beneficial to the improvement of multiloop differential active temperature control system,which is of great significance for thermal error control and compensation of precision machine tools.