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1、 Analysis of transformation of numerical control machine tool In order to survival and development of enterprises, improve the rate of CNC machine tools is necessary. Transformation of the equipment needed for NC machine tools in general, including traditional and recently introduced from abroad, du
2、e to a problem can not be put into the machine tool equipment and production lines. First, transform the contents of the NC CNC machine tools and production line transformation of the main contents are: (1) restoration of the original function, machine tools, production lines there is some fault dia
3、gnosis and recovery; (2) NC-based, in the general machine tools addend remarkable device or add numerical control system; ( 3) The renovation, to improve accuracy, efficiency and degree of automation, mechanical, electrical parts of the renovation, the mechanical part of the re-assembly process, to
4、restore the original precision; can not meet the production requirements of its CNC system be updated with the latest CNC; (4) technology updates or technical innovation, in order to improve performance or grade, or for the use of new technology, new technology, based on the original large-scale tec
5、hnology updates or technical innovation. Second, the development trend of CNC system l. To open, the sixth generation of PC-based direction The openness of the PC-based, low-cost, high reliability, rich in natural resources such as hardware and software features, and more CNC system manufacturer wil
6、l be to go down this path. At least with PC, as its front-end machines, to deal with man-machine interface, programming, networking and communications issues, the original system to take over some tasks PC CNC machines has the friendly interface, will reach all of the CNC system. The remote communic
7、ation, remote diagnostics and maintenance of applications will be more common. 2. To the development of high-speed and high precision. 3. To the intelligent direction (1) The application of adaptive control technology. Numerical control system can detect the process of important information and auto
8、matically adjust system parameters, improving the system operation status. 2) the introduction of expert systems to guide processing. Will be skilled workers and expertise, processing and general laws and special laws into the system to process parameter database support, establish an artificial int
9、elligence expert system. (3) the introduction of fault diagnosis expert system (4) intelligent digital servo drives. Can automatically identify the load and automatically adjust the parameters of the drive system to get the best state of operation. Third, the choice of numerical control system 1. Op
10、en-loop system The systems servo-driven device is a stepper motor, power stepper motors, electro-hydraulic pulse motors. This system does not require position and velocity feedback, displacement accuracy depends mainly on the angular displacement precision stepper motor and gear drive components suc
11、h as precision screw, so displacement of low accuracy. But the system is simple, debugging easy maintenance, reliable, low cost, easily converted successfully. 2. Closed-loop system The system consists of grating, sensor position detection device synchronization, etc. The actual measured position si
12、gnal fed back to the computer, compared with a given value, the difference between the two amplification and transformation, driving the implementing agencies in order to eliminate bias. The system complexity, high cost and strict temperature requirements on the environment. But the system of high p
13、recision, speed and big power. According to technological requirements and decide whether to adopt. 3. Semi-closed-loop system Semi-closed-loop system detects components installed in the middle of transmission parts, the indirect measurement of the location of the implementation of parts. It can onl
14、y compensate for part of the components within the system loop error, and therefore its more accurate than the accuracy of closed-loop system is low, but its structure and debugging as compared with the closed-loop system is simple. Current production numerical control system are more companies and
15、manufacturers, foreign companies such as Siemens of Germany, Japan, Fanuc, Inc.; domestic Everest companies such as China, the Beijing Aerospace CNC System Corporation, Huazhong CNC CNC high-grade corporate and Shenyang National Engineering Research Center. Select CNC systems are mainly based on num
16、erical control after transformation to be achieved in a variety of precision machine tools, drive motor power and the users requirements to determine. Fourth, the main steps CNC transformation 1. Determination of rehabilitation programs (1) Mechanical and Electrical Repair transformation combined. Generally speaking, in need of transformation of electrical machines, are in need of mechanical repair. To determine repair require
