Looking at China's economy, the manufacturing industry and software industry account for 70% of the market, and the most prominent manufacturing industry is the automotive industry. Compared with 2008, foreign brands accounted for more than 60% of the Chinese passenger car market. In comparison, the manufacturing process and performance of foreign cars are generally better than domestic cars.
The manufacturing process of the automobile is the most important in the whole process. The performance of the automobile, the manufacturing process, the appearance, and the safety performance are all determined by the function of the factory manufacturing equipment and the accuracy of the equipment. Among these equipment, the instrument has the most say Is the automation equipment. The automobile manufacturing industry is large in scale and requires high levels of automation. The automation technologies and products involved include control products, field buses, motion control, machine vision, discrete sensors, safety products, etc. The automobile manufacturing industry has become one of the main markets for industrial automation. The automotive industry is the second largest end-user industry for Mitsubishi PLC applications, second only to the metallurgical industry.
The automobile production line is divided into four major processes: stamping, welding, assembly and painting (painting). The automobile assembly line is the assembly from the body storage section, the chassis assembly section, the door subassembly transportation section, the final assembly section, the power assembly, the assembly section, the front beam subassembly section, the rear axle subassembly section, the instrument panel assembly section , Engine assembly section, etc. The entire system uses Mitsubishi PLC and field bus CC-Link as the core control equipment, and uses proximity or photoelectric switches to monitor the position of the execution structure. The speed regulation part is controlled by Mitsubishi FR-E500 series inverters, various control signals and actuators on site All are controlled by PLC through CC-Link.
Now many manufacturers have started to use better and more stable Siemens PLCs. Siemens PLCs have made brilliant achievements in the field of automobile manufacturing. Siemens PLCs are used in automotive REID systems (electronic tags) for process control and production information in the production process. Control to achieve the synchronization of logistics and information flow. The detailed regulations for acquiring and storing quality data are increasingly reflected in the requirements of the automotive industry quality regulations. The products of manufacturers adopting RFID technology are stricter and more meticulous, and the quality is checked layer by layer. Must comply with ISO9000 certification standards, comply with relevant legal systems, and meet the interests of auto manufacturers. And these are also what customers and sellers need.
However, PLC can achieve these functions, but these functions must rely on the engineer's programming to achieve this effect. Engineers must be familiar with the instructions in the PLC and use various rich experiences to solve various technical problems. Often, writing a program is the most difficult in the whole process. A complex program requires an engineer to be familiar with the flexible use of programming instructions, and any problems that the customer thinks must be taken into account. The most important thing is the safety of this equipment stability.
So how to write PLC program, it must be familiar with the programming instructions of these PLCs through learning, then where is there a school for PLC training, PLC training (http: //) professional training Siemens and other well-known brands PLC, PLC programming training has full-time teacher lectures, comprehensive analysis of engineering cases, the actual operation of PLC equipment and the programming of various engineering examples. In this way, various instructions can be used flexibly and programs can be written according to different requirements. What we need is not only to be able to learn PLC and master advanced productivity, in order to contribute our own strength in national industry!
Domestically, there are deficiencies in technology and software in the field of PLC. What we have to do is not only to surpass them in hardware technology but also to surpass them in software! Therefore, we cannot rely solely on imports, we must constantly strive for self-improvement, independent research and development, and national strength is strong!
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