Design And Experimental Research Of Motorized Spindle Cooling And Lubricating System

Since the equipment manufacturing industry is the foundation of a country,it is critical to improve its international competitiveness.Meanwhile,it should be noted that the whole world is currently confronted with a new round of technological and industrial revolution and the world economic situation is changing.Thus,we should seize this historic opportunity to build China as a power in manufacturing industries.In order to hold its leading position in the manufacturing industries,Germany firstly proposed "Industry 4.0".Meanwhile,China launched the "Made in China 2025" strategic plan in May 2015,which pointed out the direction of the future development,and referred to the high grade CNC machine tool technology as one of the key breakthroughs.As the crucial technology of the high grade CNC machine tool,the high-speed motorized spindle technology mainly manifests as the motorized spindle technology.In order to ensure the motorized spindle thermal stability,the cooling and lubrication system is required to control the temperature within an appropriate range.In this thesis,the 170SD30-SY motorized spindle was regarded as the object to design the cooling and lubrication system.The simulation accuracy of the system was verified by experiments and the constant temperature control was realized by PID incremental algorithm.Specific work was conducted as follows.First of all,the heat capacity and heat transfer parameters of motorized spindle heat source were calculated based on the theoretical analysis of heat conduction.Secondly,the relationship of the motorized spindle temperature,the cooling water flow rate and the pressure of the compressed air was analyzed,which provides a theoretical basis for the design and research of the spindle cooling and lubrication system.Thirdly,the design of the spindle cooling and lubrication system as well as the automatic control of the temperature by the PID algorithm was realized based on the analysis of simulation results and literature review of cooling and lubrication schemes.Fourthly,it was identified that constant temperature control and related experimental study can be achieved by the water cooling experiment,oil and gas cooling experiment,and constant temperature control experiment.Results of this study can provide optimal parameters for motorized spindle company and users while the developed system can provide a platform for the study of the comprehensive operating characteristics of the motorized spindle condition.