文档介绍：外文原文:
NC technology development trends
1 NC system developments at home and abroad
With the rapid development puter technology, the traditional beginning of a fundamental change manufacturing, the industrial developed countries spent huge sums of money on the modern manufacturing technology research and development, to create a new model. In modern manufacturing systems, CNC technology is the key to technology, bines microelectronics, computers, information processing, automatic detection, automatic control, such as the integration of advanced, a high-precision, high-efficiency, flexible automation, and other characteristics, the manufacturing industry Flexible automation, integrated, intelligent play the pivotal role. At present, NC technology is undergoing a fundamental change, from a special closed-loop control mode to general-purpose real-time dynamic open all closed-loop control mode. In the integrated on the basis of C systems ultra-thin, ultra-light; on the basis of the intelligent, puters, multimedia, fuzzy control, work and other technical disciplines, NC system to achieve high-speed, high-precision, Efficient control, automatic processing can be amended to pensation and the parameters for an online intelligent fault diagnosis and treatment of work based on the CAD / CAM C systems integration as one work, makes the central government centralized control of the grou