The invention discloses a valve
grinding method. The valve
grinding method comprises the following steps that S1, a valve is clamped and fixed to a main shaft of a grinder; S2, the grinder is started,and the main shaft drives the valve to rotate around a valve axis; and S3, the position of a
grinding wheel is adjusted so that the plane on which a
grinding wheel piece is located is perpendicular to the valve axis, a
grinding wheel driving mechanism is started to drive the
grinding wheel piece to rotate, the valve is driven to move in the axial direction by the main shaft, the grinding wheel piece feeds radially along the valve, when a valve rod is ground, the radial feed rate of the grinding wheel piece is constant, and when the valve sealing
conical surface is ground, the radial feed rateof the grinding wheel piece and the axial movement speed of the valve are completed by
programming interpolation program. The grinding of the valve rod and the valve sealing
conical surface can be realized by one clamping, the
machining quality of the valve sealing
conical surface is improved, the
machining stress of the high-
hardness valve sealing conical surface is eliminated to the maximum extent, the early wear cycle of the valve sealing conical surface is effectively prolonged, the block falling and scouring failure caused by unreliable sealing are reduced, and the service life of the valve is prolonged.