Nc machine tools is the base machine tool manufacturing equipment, so its development has been praised by people.In recent years our country machine tool manufacturing industry is facing the development of manufacture equipment and also met with the pressure of the competition in the market.From a technical level, accelerate numerical control technology is a key to solve machine tool manufacturing industry sustainable development.Rising at present, the world’s advanced manufacturing technology, ultra high speed cutting and ultra precision machining technology, the rapid development of flexible manufacturing system and computer integrated system matures, puts forward higher requirements on nc machining technology.Today’s nc machine tools are moving in the following direction.1. The reliability to maximize the reliability of nc machine tools has been the major indexes of the users care about most.CNC system will use the higher level of integration circuit chip, using special and hybrid large or very large scale integrated circuit, to reduce the number of components, to improve the reliability.Through software and hardware function to adapt the demand of all kinds of control functions, and USES the hardware structure of machine tool of ontology modularization, generalization and seriation, standardization, and makes the hardware can not only improve production batch, and easy to organize production and quality control.Also by automatically run to start the diagnostic, online and offline diagnosis and so on a variety of diagnostic procedures, implementation of system hardware, software, and various external equipment fault diagnosis and alarm.Using the alarm prompt, timely troubleshooting;Use of fault-tolerant technology, important parts on a “redundant” design, in order to realize the fault since the recovery;Use a variety of test, monitoring technology, when the production of overtravel, knife damage, interference, the accidents such as electricity, automatic protection accordingly.2. The control system is miniaturization nc system is easy to combine machine, electrical device miniaturization is an organic whole.At present mainly adopts vlsi devices, multilayer printed circuit board, three-dimensional installation method, makes possible the high density of electronic components installed, narrow large-scale system occupies a space.And the use of new type of color LCD display thin alternatives to traditional cathode ray tube, will lead to further miniaturization CNC operating system.So you can easily install it on the machine tool equipment, easier to use to the operation of the CNC machine.3. Intelligent modern nc machine tools will be the introduction of adaptive control technology, according to the change of cutting condition, automatically adjust the working parameters, the machining process can maintain the best working state, resulting in high machining accuracy and surface roughness, the smaller the at the same time also can improve the service life of the cutting tool and equipment production efficiency.Have self-diagnosis, self-healing function, in the state of the whole work, system at any time to itself and the various devices connected to the CNC system since the diagnosis, inspection.Once appear, fault, immediately adopt measures, such as downtime and fault alarm, suggest reasons for the failed parts and etc.Also can automatically make the offline fault module, and through to the standby module, to ensure that the requirements of unmanned working environment.In order to achieve a higher requirement of fault diagnosis, its development trend is to use an artificial intelligence expert diagnosis system.4. The nc programming automation currently graphic interactive CAD\/CAM automatic programming has received more applications, is the new trend of numerical control technology development.It is the use of CAD drawing parts processing pattern, then through the tool path of data in the computer to calculate and post processing, so as to automatically generate NC parts processing procedure, in order to realize the integration of CAD and CAM.Emerged with the development of CIMS technology, the current CAD\/CAPP\/CAM integration of automatic programming, with CAD\/CAM system programming is the biggest difference between the process parameters needed for programming need not by manual work, directly from the database in CAPP system.5. High speed, high precision and accuracy are two important index for nc machine tool, it is directly related to the processing efficiency and product quality.At present, the CNC system adopts digit higher processor, frequency, in order to improve the system of the basic computing speed.At the same time, the use of very large scale integrated circuit and microprocessor structure, in order to improve the system of data processing ability, improve the speed and precision of the interpolation arithmetic.Using linear motor direct drive of the machine table linear servo feed way, its high speed and a superior dynamic response.Using feedforward control technology, make the track lag error is greatly reduced, so as to improve the machining accuracy of the corner cutting.6. Multi-functional equipped with automatic tool change (dao database is up to 100 or above) of all kinds of processing center, can on the same machine tools at the same time realize milling, boring, drilling, cutting, reaming, reaming, tapping screw thread, and other process, modern CNC machine also used the multiple spindle, polyhedron cutting, namely to a component at the same time in different ways in different parts of machining.Numerical control system with multiple CPU structure and hierarchical interrupt control mode, can be on a machine tool parts processing and programming at the same time, realize the so-called “edit” at the front desk processing, the background.In order to adapt to the requirement of flexible manufacturing systems and computer integrated system, CNC system with remote serial interface, and even can be connected to the Internet, realize the data communication between nc machine tools, can be directly to control many sets of CNC machine tools.In order to adapt to the requirement of the ultra-high speed machining, CNC machine tool spindle motor and the structure of machine tool spindle 2 for one, has realized the frequency conversion motor and spindle, spindle motor bearing adopts magnetic bearing, liquid static pressure bearing or ceramic rolling bearings and other forms.Nc machine tool of flexible automation for its excellent performance, excellent and stable precision, ling jie and diverse functions cause attention, it created a mechanical products to the development of electromechanical integration, so the numerical control technology as a core technology of the advanced manufacturing technology.On the other hand, through continuous research, deepening the application of information technology to promote the further improvement of nc machine tools.