The FMS automatic line for the gear ring of a certain company in Taiyuan has a length of 65m, mainly composed of 1 set of single station tray conveying device, 8 sets of flat trays, 4 sets of manual trays, 5 sets of tray stopping stations and auxiliary devices. It is used to complete the tray transportation of 2 CNC gear milling machines, 2 vertical turning and milling composite machining centers, 3 CNC gear grinding machines, 1 chamfering and chamfering machine, 1 detection station, and 1 dedicated cleaning machine, and receives upper level MES instructions for automatic production scheduling on the line, maximizing the utilization rate of the machine tool.