CNC Machine Tool Thermal Analysis And Dynamic Modeling Of Thermal Error

In the machine work process,heat generated by friction due to the relative movement between the parts and changes in the environmental temperature causes the machine to deform This will reduce the processing accuracy.Through the establishment of the mathematical model between the thermal errors and the temperatures,be able to predict the thermal errors.Then the compensation values are sent to the CNC system of machine tool. Using this method can improve the processing accuracy of the machine tool.Use the finite element method to analyze the structural and temperature field for the entire machine tool.By this analysis,we can get the thermal deformation and temperature field of machine tool in the space of three directions.It can provide a reference for the placement of temperature sensors and displacement sensors.Build a data acquisition system.The system consists of the development board of LY-51S, DS18B20temperature sensors and CCD laser displacement sensors.It is used for measuring temperature of machine tool and thermal error between the tool and workpiece.Develop multifunctional compensation software of the host computer with Visual C++. The software includes five modules:serialport setting module,temperature recording module, curve displaying module,clock displaying module and dynamic modeling module.Using the PC as a host computer and combining with the data acquisition system sets up an experimental platform.Collect sample datas,establish thermal error model and verify the predicted effect.