Some parts of material on spring leg station in automatic line is aluminum, it is for lightweight body manufacturing. Welding, riveting, stud welding, gluing and other process are used in spring leg automatic line area. Capacity is 30JPH. The production plan is 3 working shifts and 600 cars/day, the production time is 1200 minutes/day. Daily production time 1200 minutes, automatic line equipment start. The equipment operating rate of automatic line is 85%. The manual line is 95%. The line body includes robot carrying, gluing, spot welding, Marking, online measurement and other processes.