Thermal Deformation Calculation And Analysis Of Mechanical Parts

This paper comes from the research on analysis and control technology on CNC machine tool chatter and demonstration supported by the Project of Science and Technology Support Program of Ningxia Hui Autonomous Region. It is a common physical phenomenon that the temperature cause mechanical equipment components thermal deformation and affects the performance and precision of machinery. The effects on temperature levels correspondingly increased proportionally with the improvement of the precision on machinery and instruments, so it is necessary to research on the calculation and analysis of the thermal deformation and taking effective measures to minimize the temperature effects on mechanical parts.Based on the knowledge of the heat conduction, elasticity and elasticity theory, the common components of mechanical equipment are simplified the ideal model to analyze the temperature field, thermal deformation and thermal stress in a non-uniform temperature field in this paper. Firstly, according to the theory of heat conduction, the theoretical modeling of temperature fields with two typical mechanical parts that one-dimensional of the machine tool spindles and disc parts were completed. Based on the determination of the temperature fields, we accomplished the theoretical calculation of thermal stresses and thermal deformation. Secondly, a theoretical derivation of series solution of temperature fields with three-dimensional spindle was completed. Thirdly, based on the analysis of theoretical, the temperature fields and thermal deformation of the two typical of mechanical parts were analyzed with the ANSYS software. In the same time, the thermal-structure coupling of the typical three dimensional principal was analyzed and the results confirm that the theoretical analysis is correct. Fourthly, on the basis of theoretical analysis and numerical analysis, a class of one-dimensional spindle of machine tool model was experimental analyzed. Measure the temperature distribution on the model of one-dimensional spindle of machine tool by using the STC89C52single-chip controller of multipoint temperature measurement system on the platform of XK7132CNC machine tools. And use the Micron indicators to measure spindle axial thermal deformation. Experimental results confirm the theoretical analysis and numerical analysis are reasonable, and it is an important guiding significance on thermal error modeling on machine tool spindle.