NC machine tool manufacturing industry is an important basic equipment, so it has been the development of people's attention. In recent years, China's machine tool manufacturing industry is faced with the development of manufacturing equipment, but also face the pressure of competition in the market. From the technical level, to accelerate the numerical control technology is the key to solve the continuous development of the machine tool manufacturing industry. At present, the advanced manufacturing technology in the world is rising constantly, application of ultra high speed cutting, ultra precision machining technology, the rapid development of computers and integrated system of flexible manufacturing system continues to mature, the NC machining technology proposed higher requirements. Nowadays, the numerical control machine tool is developing in the following directions.

1、maximum reliability

The reliability of CNC machine tools has been the main concern of users. The digital control system will use a higher degree of integration of the circuit chip, the use of large-scale or large scale and hybrid integrated circuit, to reduce the number of components to improve reliability. Through the software function of the hardware, in order to meet the requirements of various control functions. At the same time, the hardware structure of the machine tool body of modularization, standardization and general and the series, make not only improve the hardware production, and easy to organize production and quality checks. Through the automatic operation starting diagnosis, online diagnosis, off-line diagnosis and other diagnostic procedures, to achieve the system hardware, software and a variety of external equipment for fault diagnosis and alarm. The alarm timely troubleshooting; the use of fault-tolerant technology, adopt redundancy design to the important parts, in order to achieve fault self recovery; make use of different kinds of testing and monitoring technology, when the production process, loss of the knife, interference, power and other accidents, automatic corresponding protection.

2、control system miniaturization

The miniaturization of the numerical control system is convenient to combine the machine and the electric device. At present, the main use of ultra large scale integrated components, multilayer printed circuit board, using three-dimensional installation method, so that the electronic components to high density installation, a larger size of the system to reduce the occupied space. And the use of new color LCD thin display to substitute the traditional cathode ray tube, will make the control system further miniaturization. This can be easily installed on the machine tool equipment, more convenient for the operation of the use of CNC machine tools.

3、intelligent

Modern CNC machine tools will be the introduction of adaptive control technology, automatically adjust the parameters according to the change of cutting conditions, processing process can keep the best working state, so as to obtain high machining accuracy and low surface roughness, but also can improve the tool life and equipment production efficiency. With self diagnosis, self repair function, in the whole working state, the system at any time on the CNC system itself and its associated with a variety of equipment for self diagnosis, inspection. Once the failure occurs, the immediate use of downtime and other measures, and the failure of the alarm, prompt the location of the fault, the reasons for such. The fault module can also be automatically made off, and the spare module is connected to ensure the requirement of the unmanned working environment. In order to achieve a higher fault diagnosis, the development trend is to use artificial intelligence expert diagnosis system.

4、NC programming automation

At present, CAD / CAM graphics interactive automatic programming has been more applications, is the new trend of the development of numerical control technology. It is the use of CAD drawing parts processing patterns, and then through the computer tool path data calculation and post-processing, so as to automatically generate NC parts processing procedures, in order to achieve the integration of CAD and CAM. With the development of CIMS technology. At present, the CAD / CAPP / CAM integrated automatic programming methods, the biggest difference between it and CAD / CAM system programming is the programming process parameters without artificial participation, directly from the database of CAPP system obtained by.

5、high speed, high precision

Speed and precision are two important indexes of NC machine tools. It is directly related to the processing efficiency and product quality. At present, the numerical control system uses the digit, the frequency higher processor, in order to raise the basic operation speed of the system. At the same time, the large scale integrated circuit and multi microprocessor structure are adopted to improve the data processing ability of the system, which is to improve the speed and precision of the interpolation operation. And the linear servo feed mode of the machine tool is directly driven by linear motor, its high speed and dynamic response characteristics are very good. Using feed forward control technology, the tracking error is greatly reduced, so as to improve the machining accuracy of corner cutting.

6、multi-function

Equipped with automatic change knife mechanism (tool storage capacity of up to 100 or more) of various types of machining centers, on the same machine and realize the milling, boring cutting, drilling, turning, reaming, reaming, tapping thread and so on many kinds of working procedure processing, modern CNC machine tools also uses a multi spindle, polygonal body cutting, namely, at the same time in different parts of a parts were different ways of cutting. Due to the adoption of multi CPU structure and hierarchical interrupt control mode, the CNC system can be used in a machine tool to carry out parts processing and programming ". In order to meet the requirements of flexible manufacturing systems and computer integrated system, CNC system with remote serial interface, can even a network to realize the data communication between CNC machine tools, can also directly control of CNC machine tools.

Is suitable for ultra high speed machining, CNC machine tool with spindle and spindle motor combined structure, to realize the frequency conversion motor and machine tool spindle integration and the bearing of the main shaft of the motor by magnetic bearing and hydro hybrid bearing or the ceramic rolling bearing, and so on.

CNC machine tools to the excellence of the flexible automation performance, excellent and stable precision, agile and diverse functions caused worldwide attention, it created a mechanical products to the precedent for the development of mechanical and electrical integration, so numerical control technology become the core technology of advanced manufacturing technology. On the other hand, through continuous research, the application of information technology has promoted the further improvement of CNC machine tools.