New quality control standard: Electric vehicle motor assembly line achieves defect-free production goals

New quality control standard: electric vehicle assembly line achieves zero-defect production In the field of electric vehicle assembly line production, the conveyor line system is not only a transportation channel for materials, but also a core carrier for achieving full-process quality control. Recently, the intelligent conveying production line built by our company for a well-known electric motor company was officially put into operation. Through innovative assembly line design, it has achieved a breakthrough result of continuous production with zero defects. The electric vehicle assembly line adopts a solution that combines a modular roller conveying system with smart trays. Each tray is equipped with an RFID chip to record the current motor production status, process parameters and quality data in real time. The conveying line has 17 quality interception points set up between key stations. When the detection system finds an abnormality, the conveying line at this station section will automatically stop running and trigger a sound and light alarm to ensure that the problematic motor will not enter the next process. In the transportation process from stator winding to lacquer dipping process, we have designed a unique constant temperature transportation channel to keep the temperature of motor components stable within the process requirements during the transportation process. The speed of the electric vehicle conveying line can be automatically adjusted according to different motor models. At the rotor dynamic balance testing station, the conveying line will actively slow down to 0.5 meters/minute, creating a stable environment for high-precision testing. Of particular concern is the innovative design of the assembly section conveying system. The dual-track parallel transportation mode is adopted. The main line is responsible for the circulation of qualified products, and the auxiliary line is specially used for temporary storage and re-inspection of suspicious products. When any detection point sends an early warning signal, the transportation system will automatically switch the current pallet to the secondary line, and wait until the quality engineer confirms that the processing is completed before deciding to return to the main line or enter the maintenance channel. The entire assembly line is equipped with 132 sensor nodes to monitor key parameters such as pallet position, conveying speed, and environmental temperature and humidity in real time. The central control system builds a three-dimensional model of the conveying line through digital twin technology, which can display the precise position of each motor, completed processes and work orders to be processed in real time, achieving complete visualization of the production process. In the material distribution process, the AGV car and the main conveying line are seamlessly connected. When the system detects that the material inventory at a certain station is lower than the safe value, it will automatically dispatch the AGV to retrieve materials from the three-dimensional warehouse and run simultaneously with the conveying line at the designated interface position to complete material replenishment. The entire process requires no manual intervention. The commissioning of this intelligent conveying line has shortened the flow time of work-in-process during the motor production process by 45%, and the waiting time between processes has been reduced by 60%. At the same time, due to the improvement of the real-time quality interception mechanism, the rework rate has been reduced to less than 0.1%. At present, the system has been running stably for more than 1500 hours and transported more than 80,000 pieces of various motor components, achieving true zero-defect continuous production. In the future, we will further optimize the intelligent algorithms of the electric vehicle assembly line system and plan to implement predictive maintenance functions within this year. Through the analysis of the transmission motor current, vibration and other data, we will predict potential equipment failures in advance and provide more reliable transportation guarantee system for electric vehicle motor production.

If you have any questions or needs about the automated assembly line, please contact us via email: [email protected]