Recent Patents on Cooling System of CNC Machine Tools

With the development of machine tools for high precision and high automation, the problem of thermal deformation has become very prominent. As the spindle speed, feed rate, and effective working time of CNC machine tools are much higher than those of ordinary machine tools, the influence of heat generation and thermal deformation of machine tools on machining accuracy is far greater than that of ordinary machine tools. High-efficiency, high-precision processing machine tools, and CNC machine tools require high accuracy and stability. Therefore, the design and manufacturing of CNC machine tools must fully consider the impact of thermal deformation on machining accuracy and take corresponding measures. The cooling of the CNC machine tools can improve the machining efficiency of the machine tools, the quality of parts pro-cessing, and the service life of the CNC machine tools. Various representative patents and papers on the cooling of CNC machine tools at home and abroad have been reviewed. By summarizing a large number of patents and papers on the cooling of CNC machine tools, the cooling methods and methods of CNC machine tools, the recovery, and treatment of coolant are analyzed, and the development trend of CNC machine tools is discussed. The improvement of the CNC machine tools cooling system has a great impact on improving machining accuracy, efficiency, and stabil-ity. Therefore, more patents on CNC machine tool cooling systems will emerge in the future. © 2023 Bentham Science Publishers.