6150车床改造英语文献Word文件下载.doc

1、s first electronic computer, which shows that human beings created to enhance and replace some of the mental work tools. It and human agriculture, industrial society in the creation of those who merely increase compared to manual tools, from a qualitative leap for mankinds entry into the information

2、 society laid the foundation. Six years later, in 1952, computer technology applied to the machine in the United States was born first CNC machine tools. Since then, the traditional machine produced a qualitative change. Nearly half a century since the CNC system has experienced two phases and six g

3、enerations of development. 1.1, Numerical Control （NC） phase （1952 to 1970） Early computers computational speed low and the prevailing scientific computing and data processing is not affected, but can not meet the requirements of real-time control machine. People have to use digital logic circuit ti

4、ed into a single machine as a dedicated computer numerical control system, known as the hardware connection NC （HARD-WIRED NC）, called the Numerical Control （NC）. With the development of components of this phase after three generations, that is, in 1952 the first generation - tube; 1959 of the secon

5、d generation - transistor; 1965 of the third generation - small-scale integrated circuits. 1.2, Computer Numerical Control （CNC） phase （1970 to present） To 1970, GM has been a small computer and mass-produced. So it transplant system as the core component of NC, have entered a Computer Numerical Con

6、trol （CNC） stage （in f ront of the computer should be universal word omitted）. To 1971, the United States INTEL company in the world will be the first time the two most core computer components - computing and controller, a large-scale integrated circuit technology integration in a chip, called the

7、microprocessor （MICROPROCESSOR） , also known as the central processing unit （CPU）. 1974 microprocessor to be used in CNC system. This is because the function of the computer is too small to control a machine tool capacity affluent （the time has been used to control more than one machine, called Grou

8、p Control）, as a reasonable economic use of the microprocessor. Minicomputer reliability and then not ideal. Early microprocessor speed and functionality while still not high enough, but can be adopted to solve the multi-processor architecture. As microprocessor core is a general computer components

9、, it is still known as the CNC. By 1990, PC machines （personal computers, domestic habits that computer） performance has been developed to a high stage, as a CNC system to meet the requirements of the core components. NC system based on PC has now entered the stage. In short, CNC has also experience

10、d a stage three generations. That is, in 1970s fourth generation - small computer; 1974 of the fifth generation - microprocessors and the sixth-generation 1990 - Based on the PC （called PC-BASED abroad）. Also pointed out that, although the foreign computer has been renamed NC （CNC）, but China still

11、customary said Numerical Control （NC）. Therefore, we stress the day-to-day NC, in essence, is that computer numerically controlled. 1.3, the trend of future development of NC 1.3.1 continue to open, the sixth generation of PC-based development Based on the PC with the open, low-cost, high reliabilit

12、y, rich in resources such as hardware and software features, and more CNC system manufacturers will embark on this path. At least it used PC as a front-end machine, to deal with the human-machine interface, programming, networking and communications problems, the former NC Some systems have the mand

13、ate. PC machine with the friendly interface, will be universal to all CNC system. Remote communications, remote diagnostics and maintenance will be more widespread. 1.3.2 high-speed and high-precision Development This is to adapt to high-speed and high-precision machine tools to the needs of the dev

14、elopment direction. 1.3.3 intelligent direction to the development With artificial intelligence in the computer field infiltration and the continuing development of the intelligent numerical control system will be continuously improved. （1）adaptive control technology CNC system can detect some impor

15、tant information in the process, and automatically adjust system parameters to improve the system running state purposes. （2）the introduction of expert guida nce processing system the experience of skilled workers and experts, processing and the general rules of law of special deposit system, the pr

16、ocess parameters to the database as the foundation, and establish artificial intelligence expert system. （3）introduction of Fault Diagnosis Expert System （4）intelligent digital servo drives Automatic Identification can load, and automatically adjust parameters to get the best drive system operation.