After World War II, most of the production in the manufacturing industry relied on manual operations. After the workers understood the drawings, they manually operated the machine tools. Processing parts and producing products in this way has high cost, low efficiency, and quality cannot be guaranteed.
In the late 1940s, an American engineer, John Parsons, conceived a method. He punched holes on a hard paper card to indicate the geometry of the parts to be processed, and used a hard card to control the movements of the machine tool. At that time, this was just a concept.
In 1948, Parsons showed his idea to the U.S. Air Force. After seeing it, the U.S. Air Force expressed great interest, because the U.S. Air Force was looking for an advanced processing method, hoping to solve the problem of processing aircraft appearance templates. Due to the complex shape of the model, the high precision requirements and the difficulty of adapting to general equipment, the US Air Force immediately commissioned and sponsored the Massachusetts Institute of Technology (MIT) to conduct research and develop this hard cardboard controlled machine tool. Finally, in 1952, Massachusetts In cooperation with Parsons, the Polytechnic Institute successfully developed the first demonstration machine. By 1960, the relatively simple and economical point control drilling machine and the linear control CNC milling machine had been rapidly developed, making CNC machine tools in the manufacturing industry. Various departments are gradually being promoted.
The history of CNC processing has gone through more than half a century. The NC numerical control system has also developed from the earliest analog signal circuit control to an extremely complex integrated processing system. The programming method has also been developed manually into an intelligent and powerful CAD/CAM integrated system.
As far as our country is concerned, the development of CNC technology is relatively slow, for most domestic workshops. The equipment is relatively backward, and the technical level and concept of the personnel are backward, which is manifested by low processing quality and processing efficiency, and often delays the delivery date.
1. The first-generation NC system was introduced in 1951, and its control unit is mainly composed of various valves and analog circuits. In 1952, the first CNC machine tool was born. It has developed from a milling machine or a lathe to a machining center, becoming a modern manufacturing Key equipment for the industry.
2. The second-generation NC system was produced in 1959, and it is mainly composed of a single transistor and other components.
3. The third-generation NC system was introduced in 1965, and the integrated circuit board was used for the first time.
4. In fact, in 1964, the fourth-generation NC system was developed, that is, the computer digital control system (CNC control system) that we are very familiar with.
5. In 1975, the NC system adopted a powerful microprocessor, which was the fifth-generation NC system.
6. The sixth-generation NC system adopts the current integrated manufacturing system (MIS) + DNC + flexible processing system (FMS)
