Research On Thermo-Mechanical Coupling And Error Compensation For RAM Components Of NC Milling-Boring Machine Tool With Adjustable Stand

NC heavy type milling-boring machine tool with adjustable stand is an important equipment for mechanical engineering, aerospace, industrial production and other important industry fields. This machine in the machining process can produce all kinds of heat. The heat the Ram generated in the machining process can directly affect the machining accuracy of the machine tool. In the machine tool machining process. Ram Components received one which joint action with environment heat, friction heat and cutting heat and heat source of joint action and so on that can produce thermal deformation and affect the processing quality and processing efficiency. This article mainly aims at TH6920 heavy type milling-boring machine tool with adjustable stand’s Ram Components of the production of a machine tool plant for analysis of Thermo-Mechanical coupling field. Through the control of sensitive heat and related parameters to achieve the purpose of optimizing the processing quality and contact experimental demonstration. The works of this thesis mainly includes:Research on the main structure, load type of the Ram Components and its influencing factors. So as to reveal the characteristics of deformation of the Ram Components. Analysis of the several important error and key parts in the Ram Components which can be chosen through the research of the machine tool error types.Finite element analysis of the Ram Components. The main research on the Ram Components be effected in gravity, friction, support foe statics analysis and simulate the Ram Component temperature field and analysis of Thermo- Mechanical coupling field. To analyze and verify the significance of the influence of the Ram Components thermal error caused by three important heat source.Verified the theory of the above chapters through the experiment. Used standard bar to compensate thermal error of the Ram and Boring Axis. Control heat source at the same time for different position measurement. Completed compensation system and compensation parameter adjustment. Detected error compensation effect.For the disadvantages of compensation method of standard bar. Used the temperature sensor for different processing position of Boring Axis to the thermal error compensation. Under the premise of control sensitive heat source. To establish mathematical model between the key temperature and boring axis thermal error. Through the model to calculate the corresponding position thermal error value of boring axis with corresponding temperature. Cumulative compensation value based on the front of the compensation to implementation of compensation and in the light of the compensation method for effect validation.