In the context of Industry 4.0 and "Internet +", the future development and competition of CNC systems have undergone new changes. More competition in China will focus on how to use the advantages of the Internet to allow the computing power of CNC systems to expand indefinitely. And by understanding the emerging business models such as the sharing economy, it is an important trend in the future to reasonably build the functions that are compatible with them.
1. CNC system intelligent requirements
The need for intelligent CNC machine tools
From the perspective of manufacturing technology itself, the intelligentization of CNC system is carried out in four aspects as shown in Figure 4: intelligent operation, intelligent processing, intelligent maintenance and intelligent management.
The machine tool further improves the performance of the machine by using various sensors and real-time monitoring and compensation technology during the machining process. Companies such as Mazak and Daxie in Japan have provided many advanced technologies in terms of intelligence, such as spindle vibration suppression and intelligent anti-collision. Shenyang machine tool i5 CNC provides features such as feature-based programming and graphical diagnostics.
2. CNC system based on cloud platformOn the basis of cloud computing, the University of Stuttgart in Germany proposed the “global localization (glocalized)†cloud CNC system. The concept is shown in Figure 5. It can be seen from the figure that the human-machine interface, CNC core and PLC of the traditional CNC system are moved to In the cloud, the local only retains the servo drive and security control of the machine tool. In the cloud, the communication module, middleware and Ethernet interface are added, and the local CNC system is communicated through the router. In this way, there is a “Digital Twin†for every machine in the cloud, and the machine can be configured, optimized and maintained in the cloud, which greatly facilitates the use of the machine. The so-called Controller as a Service (CaaS) is implemented.
Cloud CNC system concept
Digital hygiene refers to the digital image of a specific physical object, including design specifications and engineering models describing its geometry, materials, components, and behaviors, as well as production and operational data specific to the entities it represents. It becomes a "companion" that is inseparable and is a physical object attribute. And up-to-date and accurate real-time mirroring of the state, including shape, position, state, and motion. The digital generation of machine tools can exist in multiple information domains at the same time. There are multiple “avatarsâ€, which play the role of program demonstration, structure and function verification and performance parameter optimization in the product design stage. Participate in the layout planning during the planning phase of the construction plant. The system optimizes simulation and other work; in the operation phase, the machining state is judged and predicted, and the intelligent control and preventive maintenance of the machine tool is realized until the end of product scrapping, even after it.
3. Internet CNC system and its ecosystemUnder the Internet conditions, the CNC system must become a transparent intelligent terminal capable of generating data, making the manufacturing process and its entire life cycle "data transparent." Through the "transparency" of intelligent terminals, the transparency of the manufacturing process is realized. It is not only convenient for processing parts, but also real-time data for management, finance, production and sales, realizing equipment, production planning, design, manufacturing, supply chain, manpower, Resource integration and information interconnection in a series of production and management links such as finance, sales and inventory.
Shenyang Machine Tool Group has built a machine tool ecosystem around i5 intelligent machine tools in the world. Figure 6 is a schematic diagram of i5 intelligent machine tools for data generation and application. Through the “transparent†i5 intelligent system, i5 intelligent machine tools can be online in real time. The management process provides accurate data base and becomes the basis of the new manufacturing industry.
Data generation and application of i5 intelligent machine tool
Intelligent machine tool internet application framework based on iSESOL
iSESOL (i-Smart Engineering & Services Online, a cloud manufacturing platform developed by Shenyang Machine Tool Co., Ltd., such as the cloud capacity sharing platform, allows users to announce their idle capacity to the iSESOL capacity platform. Users with capacity needs can quickly purchase without purchasing equipment. Gaining manufacturing capacity, in which the capacity provider can use idle capacity to obtain revenue, the capacity demand can obtain manufacturing capacity at a lower cost, and the two parties can maximize the benefits through sharing. Undoubtedly, this model will become the manufacturing Internet. An important form of +.
The above picture shows the intelligent machine tool internet application framework based on the iSESOL platform. All i5 smart devices access the iSESOL network through the iPort protocol, and non-i5 devices (such as OPC UA terminals or MTConnect terminals) can access the iSESOL network through the iPort gateway. APP applications such as ERP, MES, and remote signage achieve unified access to remote devices through real-time data and access interfaces aggregated by iSESOL. iSESOL provides data dictionary mapping for different devices to unify access methods of different devices. Cloud APP can subscribe to various events and data information through standard service or parameter naming to achieve unified device access. End users can implement various Internet applications for devices through different terminal installation APPs. The capacity synergy ecosystem established under this platform has been connected to thousands of machine tools, and currently has about 2,500 units connected daily.
The intelligentization and networking of the machine tool numerical control system is the trend of the times. Based on the concept of CPS, the development of intelligent numerical control system is guided, and the intelligentization of CNC machine tools is realized from the perspective of the whole system through the network and platform.
The development of intelligence is a gradual process. At present, there is a different understanding of intelligence, and there is no universally applicable solution. The innovation and real operation of the CNC machine tool business model must rely on the intelligent and networked CNC system. In the future, CNC systems will increasingly penetrate the influence of the Internet into the manufacturing process. Through the accumulation, transmission and mining of data, more and more intelligent manufacturing capabilities will be born. Transparent and sharing will be manufactured. The industry has brought about earth-shaking changes.
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