Solutions for rack management in RFID automotive stamping workshops

Stamping is a leading process in automobile production. As the pioneer of vehicle production, the stamping workshop undertakes the storage of raw material coils and sheets; the uncoiling and cutting of coils and other functions, the most important of which is the stamping production of various large, medium and small stamping parts, and The operation of the entire process of stamping parts from off-line to storage to delivery is directly related to the production efficiency of the entire stamping workshop.

With the rapid development of the automobile industry, each automobile manufacturer has developed from the initial pursuit of the optimal end result to the current requirement to make every link of the automobile manufacturing to achieve the optimal goal, which presents a challenge for managers The serious problem is how to control the details of the production process and how to record as much information as possible in the production process.

A large amount of production data needs to be summarized and analyzed. These data statistics work requires a lot of manpower, and most of the statistical data also have the problem of information lag. The problems found in the production process cannot be solved in time, and manual statistical information The project is single, and it is difficult to find the correlation between various problems. Also, because the available logistics area of the factory area is getting smaller and smaller, correspondingly, there are more and more problems caused by logistics constraints. It is necessary to change the existing logistics mode and introduce informatization in order to adapt to the logistics requirements under the fast-paced production mode.

Due to the lack of effective information collection means in the traditional management mode, material flow information cannot be accurately collected and shared in real time, and the obtained data also needs to be manually entered into the system, and the information has a certain delay. It takes a lot of time to find out the reason and re-check. A small stamping part may cause the entire material supply chain system to be slow, which greatly reduces the efficiency of vehicle manufacturing.

The temperature and humidity in the production process of the stamping workshop are close to room temperature. The main production equipment is punching machines, including stamping dies, and the main transmission equipment is pallets and trolleys. The pallet is used to load the plate before stamping, and the trolley is used to load the parts after stamping. At the beginning of the stamping process, the supplier usually tranSports the plates to be supplied to the stamping workshop. After the stamping workshop passes the quality inspection, it will be put into storage. The plates after storage can proceed to the next link. The whole pallet is transported to the feed port of the press by the forklift workers on demand. The specified parts are then punched out in the press and flowed through the conveyor belt to the end of the line. The off-line position is inspected by workers and puts the parts on the trolley according to the specified quantity. After the qualified parts are filled, they will be transported by forklift workers to the warehouse for storage. Unqualified parts trolleys will also be transported to the rework area for repair. Finally, the forklift personnel of the stamping department will pick and place the parts trolley on the welding tractor according to the task order, and then the tractor will enter through the door of the welding workshop, which means that the parts are out of the warehouse. The tractor can usually consign 1 to 4 parts trolleys at a time.

Through UHF RFID technology, the information management of stamping parts in each circulation link is realized, so that each node can grasp the real-time inventory and flow information of the required spare parts, improve the efficiency of logistics operation between warehouses, and make the original cumbersome and complicated information statistics The work becomes simple and transparent, and it is of great significance to help the stamping workshop realize the intelligence, informationization and automation of key material management.

The car factories of the modern automobile industry have the characteristics of large-scale production, small batches of models, rapid changes in varieties, and multi-model collinear production. These trends lead to a wide variety of stamping parts with different structures. However, the editable attributes of the RFID electronic tag can well associate the information of the RFID tag with the information of the shelf. After filling the rack with stamping parts, the off-line station starts the turntable to rotate to the operable end of the forklift, and the forklift picks up the rack loaded with stamping parts and exits for storage operations. During the exit process, the RFID electronic tag will enter the readable area of the off-line station collection point, and the UHF RFID Reader will collect the RFID electronic tag information on the shelf, and transmit the information to the background system, and the system will Complete the binding of this batch of stamping parts and chip information, which completes the establishment of basic data.

Before warehousing, use the RFID handheld terminal to scan the QR code on the outer packaging of the incoming material and the RFID electronic label of the corresponding pallet, read the corresponding information of the material (material number, package number, quantity, processing manufacturer, etc.), and send this information In the inventory management system, it is bound with the RFID electronic tag of this pallet. After the binding work is completed, the materials will wait for storage. After the raw material has passed the quality inspection and is bound to the pallet through the RFID handheld, it will be picked up by a forklift and sent to the material warehouse. Installing Honglu RFID reading and writing equipment at the entrance of the material warehouse will be able to record the storage information of materials in real time, thereby helping to effectively manage inventory.

The forklift performs the storage operation of the shelves. When passing the warehouse gate, the reading system composed of UHF RFID readers and RFID Antennas will read the electronic tag information of all the racks on the forklift, and pass through the external display system. , including the large screen and LED lights to display the quantity of the warehousing in real time, which can be checked by the forklift operator. At the same time, the warehousing data will be uploaded to the background system through the network, and the background system will obtain the information of the bound stamping parts according to the electronic label information, and complete the correspondence. Parts warehousing process, and real-time update inventory information.

The next link of stamping is welding, and all the stamping parts in stock will flow to the welding workshop. Therefore, an ultra-high frequency RFID reader is installed on the welding logistics door. Labels, complete the acquisition of the label information of the racks entering the welding workshop, the system can complete the delivery of the corresponding stamping parts, and update the inventory information in real time.

Under the premise of flexible production requirements in the stamping workshop, facing different models and different stamping parts, the racks used for circulation are different. It has realized the management objectives of standardization of shelf label installation, standardization of collection equipment deployment and standardization of operation process, and realized the seamless connection of RFID technology without changing the original operation process.

The rack management of the automobile stamping workshop using RFID technology makes full use of the technical advantages of RFID, establishes the labeling of the transfer rack, and marks the specific stamping parts through the transfer rack, and utilizes the deployment of RFID reading systems at each transfer node. The real-time control and tracking of the stamping parts supply logistics process is realized, and the entire process is automated without human intervention, which greatly improves management efficiency and reduces error rates.

Different from applications in traditional fields, the transformation of RFID technology in stamping workshops first faces the more stringent environmental requirements of industrial sites, including temperature and humidity, electromagnetic interference, vibration, dust, etc. These seemingly inconspicuous external factors, It often has an unpredictable impact on the reliability and stability of the product, and then affects the use of the entire system.