In modern industries such as automotive, 3C electronics, and household appliances, where products are manufactured on separate assembly lines with multiple configurations, “mixed-flow production” has become the norm. Ensuring that thousands of different components are precisely delivered to the corresponding workstations at the right time is the core challenge of flexible manufacturing. RFID technology, by installing tags on material carriers (such as carts and racks) and product carriers (such as cradles and slides), is like equipping the production line with “perceptual nerve endings”, achieving millisecond-level synchronization between the material flow and the production information flow, and realizing a “zero-error” state for material distribution.
“Intelligent Navigation for Material Vehicles”
Each material distribution trolley (AGV) or mobile storage rack is equipped with an RFID tag, becoming a mobile “signal source”. RFID readers are deployed at key points on the ground as landmarks. The AGV achieves precise positioning and navigation by reading these landmarks. More importantly, the on-board RFID reader of the AGV can automatically identify the RFID tags of the materials on the storage rack and promptly report the information “who I am, where I am, and what I am carrying” to the central material distribution system.
The “dynamic identity card” of the production platform
On the production line, each lifting frame or sled that carries the products is equipped with industrial-grade RFID tags. As it passes through each workstation, the workstation reader automatically reads its unique ID and retrieves the precise bill of materials (BOM) for the product from the MES (Manufacturing Execution System) in real time. The system immediately knows: The white refrigerator on this sled requires an A-type panel, a B-type compressor, and a C-color handle.
Precise “window time” material requisition and error prevention
When the production line operates at a fixed rhythm, the demand for materials at each workstation is precisely timed to the second. Based on the real-time RFID sensing of the production carrier’s location, the system can calculate the material requirements in advance and “timely” issue instructions to the material distribution system. AGV or on-the-line storage area staff follow the instructions and push the intelligent material carts containing the correct materials to the designated workstation. When the material cart arrives, the workstation reader will again verify the matching relationship between the material cart tag and the production carrier tag. If the material model, batch number do not match the production instruction, the system will immediately give an audible and visual alarm and lock the equipment, fundamentally preventing incorrect loading. This achieves “hard binding of materials and orders”, and moves quality control forward to the distribution stage.
Intelligence and Visualization of Edge Warehouses
On the complex assembly lines, there is often a large amount of materials temporarily stored. By installing RFID tags on each material storage position and combining with handheld terminals or fixed readers, real-time visual inventory management of the line-side warehouse can be achieved. The system can precisely know how many of each part are left, where they are placed in the specific storage compartment, and can automatically trigger a replenishment request to the central warehouse based on the production progress and material consumption rate.
The value of RFID in the distribution of materials in mixed-flow production lies in the establishment of a real-time, closed-loop, and adaptive feedback system. It transforms the original manual kanban, paper documents, and experience-based material flow into an accurate logistics system driven by data. This not only reduces downtime and quality losses caused by incorrect materials, but also compresses the on-line inventory and shortens the manufacturing cycle through the precise coordination of the material flow. In today’s era of increasing personalized customization demands, this capability is the core competitiveness that manufacturing enterprises need to win the market. RFID, this silent “dispatcher” on the production line, is supporting the grand vision of flexible manufacturing by ensuring that every screw is precisely in place.