▎ 摘　　要

NOVELTY - The method involves plating copper-nickel-graphene alloy on an oil seal wiper reciprocating friction section. The dirts on surface of oil seal wiper reciprocating friction section are removed. The circularity of the roundness of control lever of vehicle downhill speed reducer is not greater than 0.005mm. The concentricity of an outer circle with a center hole (1) and an inner hole cone surface (2) as reference is not more than 0.02mm. The quality of coating of copper-nickel-graphene alloy, and the dimension precision of oil seal wiper reciprocating friction section are checked. USE - Method for processing control lever of downhill speed reducer of vehicle such as car. ADVANTAGE - The control lever of downhill speed reducer of vehicle is processed in simple manner with reduced cost. The service life of the control lever of downhill speed reducer of vehicle is prolonged. The control lever of downhill speed reducer of vehicle ensures excellent wearing resistance and strong corrosion resistance. The machining rigidity of work-piece is effectively improved. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the control lever of downhill speed reducer of vehicle after rough machining. Center hole (1) Inner hole cone surface (2)