As a typical case in discrete industrial production, the assembly 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, and the parts in the production process are discrete. State, the manufacture of vehicles is primarily achieved through physical processing and assembly.
RFID technology is not just a simple replacement of bar code technology, its application in discrete manufacturing will change the production and management methods of discrete manufacturing enterprises. 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 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.
Establish 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, it is transmitted to the information system (such as ERP, MRP).
Applying RFID technology to production line monitoring enables automatic control and inspection, saving costs. RFID tags can uniquely identify each product, and record the raw materials and sources of each product, production line location, production process and inventory status through the application program, 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 and 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 bar code labels for management. Although the human error rate was reduced, it was often caused by dust, high temperature vibration, oil stains, etc. at the production site. When you encounter a case with a cover, you can't use it with both the barcode label and the manual. A schematic diagram of the application of RFID in the automotive welding production line.
In the figure, select high-temperature, dust-proof, metal-proof, anti-magnetic, reusable active package labels to monitor welding line operations through automatic 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 of the RFID tag. And strong durability, 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. Therefore, 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 sliding conveyor. As shown in Fig. 3, an RFID passive tag with a temperature resistance up to 240 °C is installed on each sliding raft carrying the automobile body. Throughout the production process, this tag runs with the workpiece, forming a data that moves with the body and becomes a “smart car body” that carries data with you. 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, so that the system is very reliable. Sex 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 on the assembly line 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 bar code or paper identification cards. The disadvantage is that barcodes and identification cards are extremely vulnerable to being destroyed, exchanged or lost. Caused a wrong operation in the production operation.
For example, Ford Motor Company, its Mexican factory began using RFID technology to solve the above problems a few years ago. The factory installs recyclable and reusable RFID tags on the racks of assembled vehicles, and then prepares the serial number for each assembled vehicle. The serial number is written into the RFID tag by the reader, with the detailed requirements required by the car. The label runs 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, the reader can automatically obtain the information in the label and send it to the central control system, and the system can collect the production data, quality monitoring data, etc. on the production line in real time, and then transmit it to the reader. 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 various disadvantages of effectively avoiding manual operations can be realized.
The application of RFID technology in automobile production lines has the advantage that other technologies can't match. The non-contact automatic data acquisition and the harsh working environment can ensure the advantages of flexible configuration, fast response and low system communication requirements. The production plant can accurately collect relevant data and conduct online analysis and processing to realize automatic real-time tracking and effective monitoring of the automobile production line, thereby improving production efficiency. It is believed that with the continuous development of RFID technology and the popularization of application systems, RFID technology will certainly have a great improvement in performance, and the cost will be gradually reduced, so that security risks will be alleviated. RFID technology is bound to become the mainstream of automotive information manufacturing and automotive information management, thus promoting the development of the automotive industry.