There are digital circuits, analog circuits, the principle and interface of single chip microcomputer and its application, C programming, VF, VB programming, computer network technology, numerical control system, numerical control processing technology, numerical control programming, automatic control theory, hydraulic transmission and pneumatic transmission.
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Development history
1948, Parsons Company of the United States was entrusted by the United States Air Force to develop the template processing equipment for the profile inspection of helicopter propeller blades. Because of the complex and diverse template shapes and high precision requirements, it is difficult for general processing equipment to adapt, so the idea of using digital pulse control machine tools is put forward.
1949, the company and Massachusetts Institute of Technology (MIT) started the same research, and the first three-coordinate CNC milling machine was successfully trial-produced in 1952. At that time, the numerical control device used electron tube components.
1959, the numerical control device used transistor elements and printed circuit boards, and a numerical control machine tool with automatic tool changing device appeared, called MC machining center, which made the numerical control device enter the second generation.
1965, the third generation of integrated circuit numerical control devices appeared, which not only had small size and low power consumption, but also improved reliability and further reduced price, which promoted the development of the variety and output of CNC machine tools.
At the end of 1960s, the direct numerical control system (DNC), also known as group control system, appeared. The computer numerical control system (CNC for short) controlled by a small computer makes the numerical control device enter the fourth generation characterized by small computerization.
From 65438 to 0974, the microcomputer numerical control device (MNC) with microprocessor and semiconductor memory was successfully developed, which is the fifth generation numerical control system.
In the early 1980s, with the development of computer software and hardware technology, numerical control devices which can be programmed automatically by man-machine conversation appeared. Numerical control devices are getting smaller and smaller, and can be directly installed on machine tools; The degree of automation of CNC machine tools is further improved, and it has the functions of automatically monitoring tool breakage and automatically detecting workpieces.
In the late 1990s, PC+CNC intelligent numerical control system appeared, that is, taking PC as the hardware part of the control system and installing numerical control software system on PC. In this way, the system is easy to maintain and networked manufacturing is realized.
Numerical control technology, also known as computer numerical control (CNC), is a technology that uses computers to realize digital program control. This technology uses a computer to execute the control function of the equipment according to the pre-stored control program.
Because the numerical control device composed of hardware logic circuit is replaced by computer, the realization of various control functions such as storage, processing, operation and logical judgment of input data can be completed by computer software. Numerical control technology is an important part of manufacturing informatization.
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