0 Introduction Numerical control technology is a kind of technology developed by the automatic micro-electronic technology computer technology automatic technology. The typical products of CNC technology are several turns, beds. The core of CNC machine tools is the CNC system. The development of numerical control systems including numerical control devices and servo units gives qualitative changes to machining equipment. Laying the foundation of modern flexible manufacturing technology, computer integrated manufacturing technology and future intelligent manufacturing technology. Since the Americans Parsons successfully developed the numerical control system in 1952, the machine numerical control system has developed faster than any kind of control technology for machine tools. . Especially in the past 10 years, in order to meet the development of the market and science and technology, seek. Modern manufacturing technology places higher demands on numerical control equipment. In terms of performance, in addition to high-speed high-precision, high-efficiency, high-reliability and flexible integration, intelligence and networking have become the inevitable trend of the development of new-generation CNC from the perspective of market adaptability.

The diversification and specialization of processing has increased the demand for processing. Only with the development of a CNC system with a single-piece CNC system that can easily add special functions can the needs of a diverse and specialized market be fully realized.

In summary. Traditional numerical control systems have faced great challenges due to their structural closure. In order to realize the high flexibility and personalization of the CNC equipment incoming line networking, the numerical control system structure system has been transformed with the Windows terminal interface and the Windows muscle operating system. The CNC system developed to connect different application purposes. Although these systems have their own strengths, they all have the common features of the modular multi-channel embedded system hardware and software and the openness of the bus. And people are divided into open CNC systems with industry standard 1 as a support platform for 3 devices. The adoption of this platform is conducive to the introduction of the latest developments in computer development. 2 The open CNC system based on the industry 1 standard is generally upgraded due to its continuous upgrade. The versatility of rich software resources and hardware resources provides people with an extremely open and open development environment. Therefore, theoretically speaking, it can easily develop a control system that meets the requirements of an open station. However, the numerical control system is a real-time control system in the industrial field. It must withstand strong shock and electromagnetic interference. And it is necessary to have a resistance to moisture and corrosion-resistant body eclipse. This aspect of the general-purpose open CNC system that is far from being able to do what people often say is actually an industrial standard buckle. The industry standard buckle adopts the same bus standard as the ordinary buckle, and has a stronger communication function. More importantly, it adopts a series of measures such as passive bus backplane, high-power anti-interference switching power supply, surface encapsulation technology, and chassis positive pressure filtration system, which greatly enhances the ability to work reliably in harsh environments.

1What is the open architecture of the open CNC system? For the system control and the manager, the open means that the CNC system can accept the standard communication protocol in use and can enter the network; Jin, the operation interface of the open total flavor control CNC system is formal or basic on all controllers; for the electrical engineer, the sweat is released, the drive shaft of the service shaft is standard. 13. The sensor and logic controller have standard Input and output; for engineers engaged in specialized personalization research, openness is in existing systems. Standard development tools can be easily implemented using standard block evaluation software and hardware.

So what exactly is an open CNC system? The American Institute of Electrical and Electronics Engineers 0 clearly defines an open system as a system that can realize system functions on different working platforms and can be interoperated with other systems. . The interchangeability of hardware and software 1 this, called 1 is the system, the requirements of the release of the code = nearly 10 years. Through the force 1; and 10 plan European Community standards, 0 is the CNC system supporting the platform.

According to the individualized requirements of the products produced by various CNC machine tools, the 0 devices with different characteristics are formed. In this way, the system has achieved great development in the United States, and the US company and company have products. However, in such a system that is phantomly known, most of its system software adopts a front-end type or a multi-interrupt type structure of a single-processor system. It cannot be called an open numerical control system in a strict sense. It can be seen from 1 that it works by directly controlling the position servo and the like, so the technical performance is not high, and it is not suitable for controlling the high speed and high-definition weakness. In the 1990s, manufacturers introduced a new 1 system. The open version 1 version 4 is one of its structures, such as the cabinet 2, not to the communication station, its internal only, and the two parts are independent. The system software person uses the functional modular structure of the D-multiprocessor system. Obviously, this system has strong openness and versatility, and has a high direction and one-way operation. If the user needs to send information from outside to the button, a dedicated, functional module can be configured.

In the late 1990s, people made full use of the multi-bus architecture technology based on the deduction bus. The real-time multitasking operating system deducted the new generation of CNC system with 0 0. 3 for its simple structure, the integration of the allocation unit 1 two-way communication Lin Yuan, this can be achieved and 0 two-way communication without configuration 0, the system of the cast is called the Xinjiang from 4 elbow 4, he is tender, Chemical, 0 system. In addition to the current seven teams of the team, the system also records the processing status of the self-growth according to the built-in expert database to update the technical data and the strong connection of the intelligent production management network. This kind of structure that installs all-round computer numerical control software on a specific hardware system integrated in 0 is actually an extension of the structure of the open CNC system to the intelligent one. 3 Discussion and conclusions As mentioned above, The interchangeability of software and hardware is the basic requirement of system openness, and the standardization of software and hardware that constitutes the system is 8230 and diversified. The foundation, however, the development of an open CNC system, China is still in its infancy. So far, the hardware and software specifications for open CNC systems suitable for China's national conditions have not yet been formed. However, this should not affect the internal control system architecture to open system, as long as the structure is easy to cut and expand and upgrade; formally flexible to form different types of different types of direction; technically more than 01 bus system high speed With the efforts of communication networking and intelligent direction, the breakthroughs made in any aspect will be a solid step towards the overall goal of the overall opening of the system structure. China Huazhong University of Science and Technology has made an effective work in the development of an open CNC system based on the modular structure of industrial standards. Many companies are also conducting similar research on how China's CNC system manufacturing companies can work together. This is a question worth pondering.

It is worth noting that at present, in the industrial manufacturing industry, the open structure of the mechanical manufacturing plant, the controller has reached, the total system of 1020. The generation of technology in the field of numerical control should create a new concept. That is, push to the degree of control of the heart. Not only limited to the scope of machine tool controllers, but also in the 2000 Machine Tools Expo held in Chicago, USA. The standard operating system based on the hardware platform. Modular software high-speed communication functions, as well as non-patented development software integrated in the open structure of the machine tool CNC system. Undoubtedly, an era of informationized digital intelligent manufacturing is coming to me. I must use and learn from foreign advanced technology to promote the development of China's manufacturing industry.

1 Shen Fujin. Thus 182000 to see the development of machine tool technology. Manufacturing technology and machine Mc.20lI2 Zhang Jie and so on. A CNC machining system based on an open structure. Machinery and 3.4 Guoqing 21st century Mei control system iiml electromechanical, 20004 received time 2000226 up to page 77 1. Tube inner diameter = 42,1 2 tube outer diameter is = 50, 1 work into the end point interpolation start fast Entering the end of the work into the starting point fast-forward starting point cutter cutting point cutting process cutter path trajectory 3 Liang Aiqing. The design of the chipless pipe cutter. Mechanical development, 1999 4 Yang Minggui, Zhang Yuan. The ultra-long tube inner wall is stable and boring intelligent control. Manufacturing technology and machine tools. 200083芮 Executive Yuan and so on. The cutting parameters of the stress cutting and the differential grooving machine. Manufacturing technology and machine tools. With 63 芮, Yuan Wu Yin and so on. Precision cutting technology and equipment development in the bearing industry.

Shanghai International Mechanical Engineering Conference. 2000 he. Lecturer at Shanghai University. Xi'an Jiaotong University 7 doctoral researcher, postal deduction

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