Research And Implementation Of A Novel DNC System Of Heterogeneous CNC Machine Tools Based On Ethernet

The rapid development of information technology,computer technology and internet technology has set the fundamental bases for the development of so called smart manufacturing technology.One of the core technologies of smart manufacturing is the Cyber-Physical System(CPS).One of the important prerequisites for smart manufacturing is the interconnection of devices.Distributed Numerical Control(DNC)system realizes the centralized management and information connectivity of CNC machine tools,and is an important component of the smart manufacturing information system.Provided that the numeric control(NC)machine tools play an overwhelmingly major role in manufacturing,the study in the thesis focuses on the development of DNC system which is able to integrate the advanced NC systems including FANUC NC system,SIEMENS NC system and MITSUBISHI NC system.The functions of developed DNC system are the data or information collection of the status of machine tools,the manufacturing processes,the analyses of the collected data or information,NC data manage and auxiliary functions like alarm fault diagnosis.Main contents of the study have:(1)The hardware architecture,data structure and communication methods for FANUC NC system,SIEMENS NC system and MITSUBISHI NC system are researched as well as the approaches to the data collection for these three NC systems.(2)Considering the hardware architecture,the system functions,and data or information flow architecture,the hetero-architecture of the DNC system is designed based on the performance requirements and functional requirements.The communication methods compatible with these three NC systems(FANUC,SIEMNENS and MITSUBISHI)are also proposed.And some key technologies are studied in depth.The system is developed using.NET technology and SQL Server.(3)The functions of core modules of DNC system,i.e.,the modules for status monitoring,the data management,the fault diagnosis,efficiency analysis,product management and quality monitoring,are presented as well as the methodology for the realizations of these functions.(4)The reliability of the developed DNC system has been well tested and the system has performed well since its application in a manufacturing factory.The research of this topic is based on the actual status and application requirements of China's manufacturing factories,and solves the problem of inconsistent communication methods for heterogeneous CNC machine tool data collection,which has important engineering significance.