The SIASUN Axle Base Line Assisted Assembly Mobile Robot is developed for axle base-line operations in automotive manufacturing. With a 700 kg payload and a ±90° flipping function, it enables precise turning and positioning of axle components. Powered by a chain-and-sprocket drive, the flipping process is smooth and reliable. Featuring a compact structure, the robot combines stability with agility, reducing manual workload and delivering an efficient, intelligent and flexible solution for axle assembly.