An Optimization Method for Thermal Convex Deformation of Machine Tool's Guideway Based on the Conservation of Energy

Abstract

With the improvement of machining accuracy and efficiency, heat generation of guideway becomes the crucial problem which will cause thermal convex deformation. Thermal convex deformation of guideway which accounts for about 22.7% of the total errors is one of the main factors affecting the machining accuracy of machine tool. A conservation of energy-based optimization method is proposed to balance the temperature field and reduce the thermal convex deformation. The main strategy of this method is to transfer the heat from high temperature regions to the lower temperature regions through a heat transfer system. The structure and contact area of the heat transfer system are determined according to the output and input heat ratio of the guideway. The simulation and experimental results show that the temperature field of the guideway is more uniform after optimized, the thermal convex deformation is reduced about 50%, it is of great significance to reduce the thermal convex deformation of the guideway and improve the machining accuracy of machine tool.