Uses: Used for electro-hydraulic switch machine railway switch conversion system products, the action rod is connected to the hydraulic cylinder to provide power, and the end is connected to the switch conversion mechanism. Features: It is a high-precision shaft part for transmission. The middle and both ends of the rod are equipped with mounting interfaces, which require high surface roughness and straightness. Process requirements: The blank is generally made of steel bar stock. The main processes include: heat treatment-turning-milling-grinding-milling-drilling-local electroplating-fine grinding after plating and other processes; the main processing equipment are CNC lathes, CNC cylindrical grinding machines, machining centers, quenching equipment, electroplating equipment. Key inspection items: surface roughness, coating thickness, straightness, cylindricity position and other items; Key inspection equipment: large and medium-sized precision coordinate measuring machine;