Abstract:Traditional belt rail derusting machine cannot meet the requirements of production process of preweld rail head derusting,as its poor derusting effect and too many faults.A new flap wheel rail derusting machine was developed.Main design parameters,such as tangential velocity,moving speed,power,special flange structure and material of flap wheel,normal force with flexible,constant pressure and self feedback feature and basic structure were introduced.Practice has proved that the flap wheel rail derusting machine,with high efficiency,low cost,good effect,rust depth controllable and easy operation and maintance,has been widely praised.It is a very efficient tool for steel derusting.