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AGV Logistics System for Automobile assembly

Release day:2019-03-13
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  This paper mainly introduces the general structure and functional modules of AGV automatic logistics, automatic feeding system for automobile assembly line, and the application effect of Mircolomay AGV in automobile assembly line, which has certain reference value for relevant industries. As more and more requirements are required for multi-machine mixing and production line reorganization, the application of AGV highly flexible logistics system will develop rapidly.
  Based on the existing automation technology, design one AGV control system for automobile assembly can greatly reduce assembly time and faults. Mircolomay AGV has a variety of loading functions, and under the supervision of the computer, it can moves independently according to the system instructions to complete a series of complex tasks. Its technology has become an important part of flexible assembly line and warehousing logistics automation system, and has been widely recognized in the automotive manufacturing industry. Mircolomay AGV can efficiently, accurately and flexibly complete the material handling task, and multiple AGVs can form a flexible logistics handling system, which can be adjusted in time with the adjustment of production process, so that more than a dozen products can be manufactured on a production line, improving the flexibility of production and the competitiveness of enterprises.
  Case in a large automobile assembly workshop: Due to the addition of new models, in order to improve production capacity, it is necessary to reform the material supply mode of door skin and interior accessories. This project was used for feeding on oil forklift trucks, which has some shortcomings such as low efficiency, punctuality and poor safety. They required to use AGV feeding to replace forklift truck workers and improve productivity. According to the present situation of equipment and automation technology in their factory, Mircolomay designed the AGV control system for automatic door and skin supply.
  There are roughly three types of handling: the logistics from warehouse to production station; the logistics between production stations; and the material handling between workshops.
  Traditional logistics methods include manual trolley, forklift truck and so on. AGV is automatically put on line in this area and saving 10% manpower. Select AGV feeding through process and logistics screening, determine the appropriate "AGV + automatic terminal" mode.
In order to ensure the convenience of feeding and personnel safety, ensure that each material from the assembly platform distance is not more than 5 cm, and bring back the empty material rack. "AGV + Automatic conveyor" has a separate control system to ensure the rapid return of empty rack. Mircolomay AGV is mainly composed of self-developed guidance motion controller, display module, I/O module, obstacle module, communication and self-test module. The communication module receives commands and tasks from the master computer, reports the car status, position, speed, direction, fault, power to the master computer, and communicates with the embedded processor through the Modbus protocol. I/O module extends the input and output lines of the processor, controls the attitude by speed signal, path offset signal and direction control signal, and achieves the functions of forward, backward, left and right turn of AGV body.
  When encountering obstacles, AGV can automatically decelerates and stops to avoid collision. When the obstacle is removed, AGV will automatically rework. Obstacle sensors mainly include sonar area detection sensor which R&D by Mircolomay AGV, infrared array marginal detection sensor, or German laser sensor depends on application.
  This project uses automatic handling AGV trolley to replace manual trolley. For super-large and overweight parts, AGV can reduce the intensity of manual labor; reduce forklift truck entering workshop, eliminate hidden safety hazards such as noise and exhaust gas; improve the mode of logistics on-line, and improve the level of logistics management. In order to ensure the synchronization of the body and parts, it is necessary to know the working order of the assembly line in advance, install the production information and obtain the bar code, so as to obtain the working order data of the assembly line in advance, and display it on the big screen, instruct the marshalling operator to arrange the parts of the corresponding model, and arrange them in order, and then send to assembly line by AGV.
  The operator can know which car parts will be assembled next and the assembly status of the car currently being assembled according to the large screen. Each vehicle on the display has its own bar code, which allows the operator to check whether the assembled vehicle is correct or not. Once the material is loaded, the vehicle caption jumps away, showing the vehicle that needs to be assembled behind. Operators are arranged according to the rhythm, so the staffing is more reasonable under normal circumstances. After implementation, the assembly time is reduced by 20%, the assembly failure is reduced by 39%, the investment recovery time is reduced by 57%, and the labor force is reduced by 10%.
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