1。4 emphasis on new technology standards and specifications to establish 

        1。4。1 With regard to numerical control system design and development of specifications 

        As mentioned earlier, open architecture CNC system with better versatility, flexibility, adaptability, scalability, United States, the European Community and Japan and other countries have to implement  the strategic development plan and an open architecture CNC system specifications (OMAC , OSACA, OSEC) research and development, the world's three largest economies in the short term were almost the same scientific plans and specifications, numerical control technology foreshadowed a new era of change to come。 China has also started in 2000, China's regulatory framework  ONC numerical control system research and development。

      1。4。2 With regard to numerical standards 

        NC standard is the development of information technology industry a trend。 Numerical control technology 50 years after the birth of the exchange of information are based on the ISO6983 standard, which adopts the G, M code that describes how (how) processing, is characterized by its very nature-oriented process , obviously, he has become increasingly unable to meet the modern CNC Technology high-speed development。 To this end, the international community is studying and developing a new CNC system standard ISO 14649(STEP-NC), whose purpose is to provide a specific system does not depend on the neutral mechanism capable of describing products throughout their life cycle, a unified data model in order to achieve the entire manufacturing process, as well as various industry standardization of product information。 

        The emergence of STEP-NC could be a revolution in the field of numerical control technology for the development of numerical control technology and the whole manufacturing industry, will have far-reaching impact。 First of all, STEP-NC propose a new manufacturing philosophy, the traditional manufacturing philosophy, NC machining program focused on a single computer。 Under the new standard in, NC programs can be distributed on the Internet, this is an open numerical control technology and network development。 Secondly, STEP-NC CNC system can significantly reduce the processing of drawings (about 75%), processing, programming time (about 35%) and processing time (about 50%)。 

        At present, the European and American countries attach great importance to STEP-NC research, the European launch of the STEP-NC of the IMS Program (1999。1。1 ~ 2001。12。31)。 Participating in this project are from Europe and Japan, 20 CAD / CAM / CAPP / CNC users, vendors and academic institutions。 The United States, STEP Tools is a global exchange of data within the software development industry, he has developed for CNC machining the exchange of information super model (Super Model), whose goal is to use a unified description of all the process specifications 。 At present this new data exchange format has been equipped with SIEMENS , FIDIA  and the European OSACA-NC NC system is verified on the prototype。 

        2 pairs of CNC technology and its industrial development of China's basic estimate 

        Numerical control technology in China started in 1958, nearly 50 years of development history can be pided into three stages: the first stage, from 1958 to 1979, that is, closed-end stage of development。 At this stage, foreign technology due to the blockade and restrictions on China's basic conditions , numerical control technology development is relatively slow。 The second stage is in the country's '65', '75' and during the '85' in front, that is, the introduction of technology, digestion and absorption of the initial set up phase of the localization system。 At this stage, as the reform and opening up and national attention, and research and development to improve the environment and the international environment, China's numerical control technology research, development and localization of the product have made considerable progress 。 The third stage is in the country's '85' of the late '95' period, that is the implementation of the industrialization of research into the market competition stage。 At this stage, China's domestic CNC equipment has made substantial progress  in industrialization 。 In the '95' the end of the domestic-made CNC machine tools market share of 50%, with domesti  CNC system (universal type) also reached 10%。