The Development Of Mechanical Equipment Control Technology


Here to explain some information about Shenyang machine tools, in order to let everyone know more about the development and past history of Shenyang machine tools, and the structure of machinery! Today we talk about the development of mechanical equipment control technology!

The earliest controls were manual controls. The invention of the steam engine in the 18th century marked the arrival of the first technological revolution,Human society has entered the era of industrialized mass production. The application of electricity in the 19th century marked the beginning of the second technological revolution, and human society began to enter the era of electrification. From the 1920s to the 1930s, the relay original contactor control system was used to realize the control of starting, braking, forward and reverse rotation of mechanical equipment. The advantages of relay-contactor control are simple structure, low price, convenient maintenance and strong anti-interference ability, so it is widely used in various mechanical equipment. The relay-contactor control system can not only realize the automation of the production process conveniently, but also realize the centralized control and remote control.

At present, the control of the original contactor of the relay is still one of the most basic electrical control forms of mechanical equipment in my country. The disadvantages of the relay-contactor control system are: due to the fixed wiring form, it is inconvenient to change the control program during program control, and the flexibility is poor; the use of a contact switch, the operating frequency is low, the contacts are easily damaged, and the reliability is poor. From the 1940s to the 1950s, the AC magnetic amplifier – electric pumping appeared, which is a closed-loop feedback system, and the control accuracy and rapidity of the system were improved. In the 1960s, the Transistor-thyristor-powered DC speed control system and AC speed control system not only greatly improved the speed control performance, but also reduced the mechanical equipment and floor space, with less power consumption and high efficiency, completely replacing the AC magnetic field. Amplifier – Motor Control System.

In actual production, because there are a large number of simple program control processes controlled by switching quantities, and the actual production process and process are often changed, the traditional relay-contactor control system often cannot meet this need. In the 1960s, an automatic device that can easily change the control program according to needs, has a simple structure and a price, the sequence controller, which realizes the control function through the insertion or programming of the combinational logic elements, can meet the needs of the program frequently. The changed control requirements make the control system have greater flexibility and versatility, but it still uses convenient means, and various functions are also limited. With the development and application of another large-scale integrated circuit and microprocessor technology, a new type of industrial controller with microprocessor as the core appeared in the 1970s, the programmable logic controller (PLC), This kind of device can fully adapt to the harsh industrial environment. Because it has the advantages of computer control and relay control system, it has been widely used in industrial control as a standardized general equipment.

Since the advent of microcomputers in 1971, it has been widely used in the local control of mechanical equipment or the control of the whole machine, reducing mechanical parts, improving production efficiency, and reducing the labor intensity of workers, of which Cnc machine tools are a typical example. In order to solve the automation of single-piece and small and medium-sized batch production, which accounts for about 80% of the total mechanical processing, to improve labor productivity, product quality and reduce labor intensity, the world’s first 3-coordinate vertical CNC milling machine was produced in 1952, which marked the The beginning of CNC technology. With the rapid development of computer technology, the application of CNC machine tools is increasingly widespread, and further promote the development of CNC systems, resulting in automatic programming system (APS), computer numerical control system (CNC), computer group control system (DNC) and flexible manufacturing System (FMS). Computer Integrated Manufacturing System (CIMS) and Computer Aided Design and Manufacturing Integration (CAD/CAM) are the advanced stages of mechanical manufacturing integration, which can realize all automation from design to manufacturing.
To sum up, the generation of mechanical equipment control technology is not isolated, but the result of the mutual penetration of various technologies. It represents a new generation of production technology in the making, has shown and will show more and more powerful power.

 


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