Application scenarios and cases of RFID in manufacturing!UHF Sticker Production

　　Application scenarios and cases of RFID in manufacturing

　　Under the trend of intelligent manufacturing transformation, RFID, as a non-contact automatic identification technology, can automatically identify target objects and obtain related data through radio frequency signals. Because RFID implementation and deployment costs are low, data collection and transmission methods are very convenient, so It has received more and more attention from enterprises. Compared with barcode, magnetic card, IC card and other technologies, the application advantage of RFID is that it can realize batch processing, long-distance non-contact reading and writing, large data capacity, reusable, insensitive to pollution, and adapt to various complicated working conditions.

　　1. RFID working principle and classification

　　The working principle of RFID is very simple: after the tag enters the magnetic field, the reader will sense the tag signal, the tag obtains energy through the radio frequency signal (passive tag or passive tag) or the tag actively sends a signal of a certain frequency (active tag or Active tags), and then the reader reads electromagnetic waves and converts them into data, which are sent to the central information system for relevant data processing.

　　A complete RFID system

　　Therefore, a complete RFID system consists of three parts: a reader, an electronic tag, and an application software system. From the perspective of the communication and induction methods between the RFID card reader and the electronic tag, it can be roughly divided into two types: inductive coupling and electromagnetic wave coupling.

　　Comparison of inductive coupling and electromagnetic wave coupling

　　Table 1 Comparison of inductive coupling and electromagnetic wave coupling

　　Inductive coupling is mainly applied to passive tags. Passive tags obtain signal energy through magnetic field induction. Because the RFID chip supports low frequency, the identification distance is short, and the identification speed is as fast as 100 sheets per second, and the implementation cost is low.

　　Electromagnetic wave coupling can be passive tags or active tags. Since active tags support ultra-high frequency and microwave frequency bands and have their own power supply, the identification distance and identification speed are farther and faster than inductive coupling, and the implementation cost is relatively high. high.

　　Whether it is an active RFID system or a passive RFID system, its role is to identify goods and read data. However, the two types of RFID systems are different in signal strength, sensing range and reading speed, and their respective supporting application scenarios are also different.

　　2. Application scenarios of RFID in manufacturing

　　RFID is not the same as a sensor. The sensor dynamically and continuously obtains device operating status data, while RFID reads and transmits data only when the tag enters the sensing range. Therefore, RFID technology applications are mainly concentrated in application scenarios such as workshops, logistics and positioning.

　　1. Application of RFID in smart workshop

　　1) Production line mixed-flow manufacturing

　　Mixed-flow manufacturing is a production method in which a company produces multiple products on one assembly line within a certain period of time. Several product varieties with basically the same process flow and production methods are scientifically arranged on one assembly line and put into production. The order is implemented in a rhythmic and proportional manner. The mixed continuous flow production is based on the premise that the variety, output, working hours, and equipment load are fully balanced.

　　Mixed flow manufacturing

　　With the growth of user's personalized needs, matching and customization in the industrial production of manufacturing enterprises has gradually become a trend. The mixed production line production mode of mixed-flow manufacturing can well meet the needs of personalized customized matching production. By installing RFID tags on complex parts and pallets, and installing industrial readers on processing equipment and lines, intelligent communication between products and equipment is realized, and many problems such as chaotic process management caused by untimely data collection are effectively avoided. Provide data support for MES by collecting work-in-process status and production process status in time to ensure that MES can schedule each workstation in time to make each workstation busy during the cycle to complete the maximum amount of operations, thereby reducing idle time. Increase productivity.

　　At present, SAIC-GM-Wuling has implemented more than 6 types of mixed-flow production of cylinder blocks by installing RFID tags on the cylinder block and cylinder head processing production line. The quality data and process data of the entire production line have been effectively collected. Midea home air conditioners install RFID tags on the factory’s flexible assembly lines, procedures, and work boards to achieve automatic data collection during the home appliance assembly process, and the data collection rate is increased to 99%. Each line of a single product reduces manual barcode scanning events by 5 minutes. MES data The accuracy rate is increased to 90%.

　　2) Tool life cycle control

　　The purpose of tool management is to realize the information management of the tool's full life cycle, and to understand the use and inventory status and location of the tool in a timely manner. Before the tool is purchased and stored in the warehouse, an electronic label is added to the tool as the unique identification information of the tool. In the process of tool scheduling and use, by collecting tool information in time, it is possible to clearly understand in the system whether the tool has been loaded, the specific corresponding machine tool, and the cycle and duration of use. By keeping track of the tool's position and usage status in time, the company can understand the tool wear and replace it in time to ensure the safe use of the tool.

　　Tool control

　　Wuhan Heavy-duty Machine Tool is a large-scale backbone enterprise that produces heavy-duty and super-heavy machine tools with the largest specifications and the most complete varieties in China. As the most important part of the machine tool, the enterprise reads the tool information for the machine tool RFID chip in time to understand the tool use status data, and according to The tool wear status feedback system changes the tool in time. Improve the safety of tool use and ensure that the machining and production efficiency of machine tools is in the most efficient state.

　　3) Intelligent maintenance

　　An enterprise in Dongguan specializing in electrode tube production, by opening up the information flow and manufacturing flow of molds from design to manufacturing, improve CNC processing efficiency, reduce warehouse personnel, reduce measurement personnel, and increase EDM utilization rate by more than 20%.

　　The specific implementation method is to install RFID tags on each electrode tube, and carry out the whole process from transistor storage, production, measurement, and discharge. Through the data collection of inventory, configuration and on-site, the whole process from electrode design to manufacturing, measurement and use is extended, so that data and manufacturing are seamlessly interacted, and the whole process is automated and unmanned.

　　Electrode data collection and information tracking

　　2. The application of RFID in intelligent logistics

　　1) Material distribution turnover box management

　　The application of RFID technology to logistics turnover box management can greatly improve the efficiency of the logistics system, realize digital warehouse management (warehouse location management, fast real-time inventory), etc., make management more scientific, timely and effective, and ensure high-quality data exchange in the supply chain. This will bring about a substantial increase in logistics efficiency, thereby reducing the overall cost of the system.

　　Logistics turnover box management

　　In Sany Heavy Industry Factory No. 18, all material distribution outlets are equipped with RFID readers, and RFID pickers are installed on the assembly line. All material in and out of the warehouse and on-line picking information will be collected in a timely manner and fed back to the background. system. The intelligent identification system of palletizing warehouse can realize the transparency and intelligent guidance of the distribution process through intelligent components such as automatic warehouse, RFID smart trolley, and RFID pallet, and improve the efficiency and accuracy of assembly material distribution.

　　2) Supply chain vehicle guidance and unloading management

　　Through RFID and intelligent transportation technology, combined with the material supply requirements of the factory, the factory supplier's vehicle reservation, queuing, identification, and intelligent distribution of unloading resources in the factory have been realized. This is a bit like a train ticket booking system. Before arriving at the station (factory), the supplier will make an appointment queuing (buying tickets) through the online reservation system, and after arriving at the factory (station), follow the signs to the reserved unloading position to unload (wait and board). vehicle).

　　Supply chain vehicle guidance and unloading management

　　At present, Midea’s microwave oven Malone base deploys and implements the supply chain vehicle guidance and unloading management system to realize the material-pull supply chain model. Through the RFID system, it can understand the logistics resource status of the entire factory area, channel the logistics resources of the factory area, and realize the control of the supply chain vehicles. The arrival time, unloading resource arrangement guidelines and time control improve the utilization rate of logistics resources in the factory. Through the unified deployment and guidance of vehicles and unloading resources in the factory, the factory has increased the utilization rate of logistics resources by more than 30% and the delivery accuracy by more than 15%.

　　3. The application of RFID in smart products

　　The smart board cooperates with RFID technology to realize the functions of design, production, sales, inspection, diagnosis and maintenance, information statistics, full cycle information management, operation information record feedback, diagnosis and analysis. It is of great value to enhance the image of product intelligence and realize the intelligence of the product life cycle.

　　Smart board with RFID technology

　　Meike Smart Freezer realizes the whole life cycle management from R&D, manufacturing to sales by embedding smart cards and RFID chips inside the product. In the manufacturing process, RFID is used to promote the integration of many aspects of manufacturing and realize the new value of smart products by leaps and bounds. Provide customers with a better service experience by collecting data on the usage status of home appliances.

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