【正文】 The choice or designs the cutting tool and the jig。 Determination processing plan。s microputer has replaced the small puter. Computer digital control is to use a mechanical control unit for the NC specialized microelectronic system. CNC and DNC used a digital puter, because it can distinguish between the two different types of systems. These two systems are three main differences: DNC puter to transmit data to a large number of machines and receive data from, and CNC can only control one or a small number of machines. DNC puter can be remotely controlled, and the only shortrange puter CNC control. DNC software not only as a single product to be developed, but also as an important manufacturing data management system. DNC software development work to increase the working capacity. Computer digital control system versions such as the overall structure of Figure . Plans can be seen by Reading with control of access to the system for the first part, in this regard, puter numerical control system is similar to the traditional appearance of a digital control system However, the scheme used in puter numerical control system is different. in the traditional digital control system, through the perforated paper for the Reading with a working part of each volume cycle. Microprogram controller in a tape in the process, read, in the implementation of a preimplementation of this one. In puter numerical control, the entire process once they are imported and stored in the puter39。s. At present, economy of our country type numerical control machine tool needs amounts to be 8000 ~ 10000 platforms about every year. Be also very cheap though having several tens manufacturers to production be prices, the technology develops but slouly for many years, function and fairly have a few problem , unable satisfied reliability aspect marketplace need. the new numerical control product With the development of machinery processing technology, correct numerical control machine tool the function and satisfies these to e to adapt to demanding to need the product developing a few new integration of machinery with electronics numerical control more and more high , urgent demand. By the same token, move for realizing high speed , demand to develop the straight line electric motor , be used in drive working table linear motion directly. Straight line electric motor that the Japan FANUC pany produces, displacement speed can reach 100 m/min. The Japanese THK pany , German INDRAMAT pany , SIEMENS pany are similar to a product all in developing and producing this. To sum up ,development of numerical control technology is that the technology develops need of developing productions synchro , being also basis at the same time but develop with the modern puter art , electron. Now the numerical control technology is already mature , develops with expanding very much more quickly. Future CNC system will may make machinery easier to use , cheaper. ○ 3 Numerical Control of Production Equipment From the scientific and mercial point of view， Digital control technology in the development of bulk processing in the manufacturing sector has a major achievement。s basic frequency may amount to 50 ~ 120 MHz, recently Intel gallop the processor (Pentium) , basic frequency already amount to 450 MHz. Memory capacities are also very big , volume is very small, since being that mass production , messenger cost e down , reliability improves. That in development of software aspect, OS, the Windows application, feasible PC operation are simpler and convenient especially is perating. From minitype, machine , the workstation build the CAD/CAM software in large amount to PC transplanting , Sanweitu display and handicraft data base on PC. The opening to the outside world plus PC , the technician who attracts a great quantity have thrown into the software exploitation , feasible PC software resource has enriched extremely. 2. Miniaturizes to satisfy the integration of machinery with electronics request With the development of microelectronics technology, the largescale integrated circuit integration level is more and more high , volume is more and more small. The numerical control equipment factory adopt grand scale IC and adopt the surface installation handicraft (SMT), have realized threedimensional body assembling , have equipped entire CNC with the request posing very small, to adapt to machinery manufacturing industry integration of machinery with electronics. 3..Improves manmachine interface , convenience of customers is put into use For making operation person can handle very easy to have numerical control machine tool in hand, the numerical control equipment childbirth factory effort field improves manmachine interface , facilitates a programming , adopt an interactive mode to the full , makes a consumer be put into use going to the lavatory, if the Spain FAGOR pany gives birth to a child FAGOR 8050 series , the editors who adopt the each other dyadic editor program to guide system , simplification procedure, use the brief table editor program , make use of a blueprint to build procedure. Whose 8050 TC type numerical control system, has been called (FAGOR800 series CNC system) dyadic top grade fool numerical control system , whose operation face ply has been used the sign key , the consumer can according to what be needed the queen who processes a part , chooses a job gram , imports the artwork data, be OK to realize 3 semiautomatic or fullautomatic treating. The various automation operation is not all elected if the face ply is upper, location value and chief axis rotation rate being CNC system39。s ends, and have the assistance function control system take the paper as the data carrier to invent。 1 外文翻譯 ○ 1 The numerical control technology Numerical control technology is