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Application of RFID in automobile production lines




The assembly and production activities of automobiles have the following characteristics: the production process is parallel and asynchronous, the equipment functions are redundant, the control quantities are independent of each other, the production resource management is complicated, the parts in the production process are in a discrete state, and the production of the vehicles mainly  through the physics Processing and assembly to achieve.


RFID technology is not just a simple replacement of barcode technology, its application in discrete manufacturing will change the production and management methods . Because RFID technology has many advantages such as large data storage capacity, readable and writable, non-contact, long recognition distance, fast recognition speed, good confidentiality, strong penetrability, long life, good environmental adaptability and ability to recognize multiple tags at the same time, It can be used to replace the barcode to identify and track the vehicle on the automobile production line. The whole process without manual intervention which can greatly reduce the labor intensity and error rate of the workers. Nowadays, RFID technology can be used to realize automatic, high-speed and effective recording, which reduces the labor intensity of the operator, thereby improving the qualification rate of the product.


Establishing a unified central database on the enterprise workshop site as an information platform for the circulation of goods, so as to facilitate the overall standard management. In the industrial sector, RFID technology is used to assign an identification number (ID) to each component in the product, that is, the name of the component in the information network. Through the RFID technology, the production status and inventory status are mapped to the information network, and registered in the In the on-site central database, then transmitted to the information system (such as ERP, MRP).


Applying RFID technology to production line monitoring ,it  enables automatic control and inspection, saving costs. RFID tags can uniquely identify each product, through the application program to record the raw materials and sources of each product, production line location, production process and inventory status , providing an effective basis for enterprises to better manage production and adjust inventory.


The automobile manufacturing industry was originally a large-scale production process of multi-work, multi-process, multi-materials. Nowadays, with the development of personalized cars (purchasers can customize cars), almost every car will have some personalized Place, therefore, it is necessary to apply RFID technology to achieve transparency throughout the production process. The automobile industry chain can be easily divided into three basic links: parts manufacturing, vehicle assembly and after-sales service. At present, RFID technology is mainly used in parts manufacturing and vehicle assembly. Whether it is a parts manufacturer or a vehicle assembly plant, the manual management of a large number of components ,complex and numerous manufacturing processes is not only error-prone but also unable to quickly improve the operational efficiency of each process from the source.


Application of RFID in automobile welding production line


In the early automobile body welding production line, most of the manual methods were used. It is easy to cause human error when the written operation manual is operated step by step. Later, it was gradually changed to use barcode labels for management.  Although the human error rate was reduced,  identification errors often occur due to Production site dust, high temperature vibration, oil stains, etc. When encounter a case with a cover, you can't use it with both the barcode label and the manual.


Choosing  high-temperature, dust-proof, metal-proof, anti-magnetic, reusable active package labels to monitor welding line operations through automated identification operations. the operation instruction information (vehicle type information, welding instruction information, program, etc.) can be stored in the target tray, and the antenna can be set at a higher place in the welding production line in order to avoid the influence of people and machines, due to the strong anti-pollution ability and  strong durability of the RFID tag. it greatly reducing recognition errors and effectively improving the visibility of the internal supply chain.


Application of RFID in automobile coating production line


The process of the automobile coating production line is complicated, the model changes greatly, and the production flexibility is large. The purpose of the automobile painting is to make every one of the cars sold make the consumers look more perfect. so , each process link of the workshop production line must have a very high level of automation and quality monitoring system.  therefore ,the RFID technology is adopted in the  body recognition system of the automatic control system of the production line, and the information of various field data statistics, status monitoring and quality inspection in the production process can be collected in real time and sent to the production control center in time.


In the automobile painting production line, the conveying equipment is a skid conveyor, and one RFID passive tag with a temperature resistance up to 240 ° C is installed on each of the sliders carrying the automobile body. In the entire production process,  The tag runs with the work piece, forming a data that moves with the body, and becomes a "smart car body" that carries data . According to the different needs of the production process and management, the on-site reading and writing station can be set at the entrance of the painting workshop, the branching of the workpiece logistics, and the important process (such as spray booth, drying room, storage area, etc.). Each field reading and writing station can complete the writing of the skid, body information and painting color and frequency , and send the information to the control center.


RFID technology combined with fiber-optic Ethernet and field bus can form a complex automatic control system, realize flexible production of automobile coating production line, improve the automation level of automobile body production and adapt to the flexibility of different varieties of production, make the system have good reliability and fault tolerance


Application of RFID in automobile assembly line


As the final link of automobile production, the assembly shop involves many parts and many processes, which plays an important role in ensuring the quality of the car and the progress of the production. Any interruption of the assembly process means the delay of the operation. In the assembly line, especially using the JIT (Just In Time) production method, the raw materials and parts must be delivered to the station on time, and the inventory and material supply must also match the vehicle assembly progress. Prior to the adoption of RFID technology, automobile manufacturers manually tracked and monitored the progress of vehicle assembly by using barcode or paper identification cards. The disadvantage is that barcodes and identification cards are extremely vulnerable to being destroyed, exchanged or lost. therefore, erroneous operations occur in production operations.


For example, Ford Motor Company, its Mexican factory began using RFID technology to solve the above problems a few years ago. which  installs recyclable and reusable RFID tags on the racks of assembled vehicles, and then prepares the serial number for each assembled vehicle. this serial number is written into the RFID tag by the reader, and with the detailed requirements by the car runs along with the assembly conveyor.. The reader is installed at the appropriate location at each working point to ensure that the vehicle completes the assembly task without errors at the various line locations. When the hanger carrying the assembled vehicle passes through the reader, it can automatically obtain the information in the label and send it to the central control system, and which can collect the production data, quality monitoring data, etc. on the production line in real time, then transmit it to the  Material management, production scheduling, quality assurance, and other related departments. In this way, the functions of raw material supply, production scheduling, quality monitoring, and vehicle quality tracking can be realized at the same time, and  effectively avoid various drawbacks of manual operation


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