Project introduction: The wheelset is the part of the rolling stock that is in contact with the rail, and is composed of two left and right wheels firmly press-fitted on the same axle. Before maintenance, the coating on the axle and spokes needs to be completely peeled off, and the coating is an epoxy resin coating material with a thickness of 150-250 μm. The composite laser cleaning technology can control the cleaning time of each wheelset within 8 minutes, and the cleaning efficiency reaches Sa3 level (the highest cleaning standard) without damaging the substrate. NCC Shenzhen provides CRRC (Qingdao Sifang Vehicle Research Institute) with comprehensive services for overall project design, automation control and equipment supply, project construction and commissioning and acceptance.