As a typical situation in discrete industrial production, the assembly production activities of automobiles have the following characteristics: the production process is parallel and asynchronous, the redundancy of equipment functions is large, the control amount is independent of each other, the production resource management is complicated, and the parts in the production process are discrete State, vehicle manufacturing is mainly achieved through physical processing and assembly.
This article studies the application mode of RFID technology in the automobile assembly line based on the specific situation of an automobile production enterprise in Anhui Province.
At present, the company mainly uses bar code technology in the automotive assembly production line. The station employees manually scan the body VIN code and the component bar code for vehicle tracking and assembly information collection. The entire collection process is relatively time-consuming. When the barcode is damaged or the stain is unrecognizable, the employee needs to manually input the VIN code or part code of the vehicle. The error rate is high, it takes a long time, and it is difficult to speed up the production cycle. The visibility of the production site needs to be improved. It is necessary to provide workers with real-time and accurate assembly guidance to prevent the occurrence of miss-installation and misassembly, and the real-time monitoring of the assembly of the production line vehicles. The feedback of material consumption information is not timely, it is difficult to achieve real-time pulling of production materials, resulting in excessive production material inventory and affecting the flow of funds. The lack of associated management of employees and their assembly parts makes it difficult to assign responsibility to people when tracing quality problems caused by manual operations.
RFID technology is not just a simple replacement of bar code technology, its application in discrete manufacturing will change the production and operation of discrete manufacturing enterprises. Because RFID technology has many advantages mentioned above, it can replace the barcode to mark and track the vehicle on the automobile production line without manual intervention in the entire process, which can greatly reduce the labor intensity and error rate of workers. Nowadays, RFID technology can be used to achieve automatic, high-speed and effective recording, reduce the labor intensity of operators, and thus improve the product off-line qualification rate.
Applying RFID technology to the automobile manufacturing industry and integrating it into the MES system can improve the management and control level of the production process, effectively track, manage and control the resources including materials, equipment and human resources required by production; combined with the upper management system , Can reasonably schedule and manage these resources, improve manufacturing competitiveness, improve production organization, shorten production cycle, reduce the number of work in progress, improve product quality and reduce human resource consumption. It has important theoretical significance for the development of discrete manufacturing production system models and application solutions, improving the visual monitoring of the manufacturing process and product quality tracking level, promoting the formation of RFID technology application standards and norms in the manufacturing industry, and driving the industrialization of RFID technology in China Value.
2 System goals
Based on the above needs analysis, the following general goals of the system are put forward: to make full use of the technical advantages of RFID, combined with the MES system of the assembly shop, to solve the problem between the planning layer of the enterprise's current ERP system and the process control layer of the shop floor automation system, LES (LogisTIc ExecuTIon System, logistics Execution system) The problem of information and management between the internal logistics level of the workshop and the production control layer of the MES system, between the vehicle quality traceability system and the original MES system, to achieve the visualization and digital management of manufacturing and quality. It is broken down into the following sub-goals:
(1) Combining RFID technology with production line scheduling system to realize intelligent production line scheduling on the basis of automatic production line scheduling.
(2) Integrate RFID technology into the assembly station of the production workshop, use RFID tags to identify parts for data collection, always grasp the production line material consumption information, pull supply logistics without delay, and further meet the needs of the JIT supply mode; The installation records of important components provide accurate and reliable data support for the quality traceability system.
(3) Combining RFID technology and on-site visualization system to provide real-time and accurate assembly instructions to workers in the station.
(4) Combining RFID technology with the workshop personnel management system and quality traceability system, in addition to the function of personnel management, it can also record the assembly operations and realize the assembly responsibility to the people.
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