Composite axle box positioning device and processing and assembling method thereof

The invention provides a composite axle box positioning device and a processing and assembling method thereof. The device is characterized in that a composite positioning structure of combining a steel spring with a rubber spring is adopted, so that zero clearance and zero wear limit and assembling for positioning of an axle box is realized so as to improve the horizontal and longitudinal rigidities and proper vertical rigidity of the axle body positioning device synchronously. The composite axle box positioning device comprises a positioning guide column which is vertically connected with a structural frame through positioning bolts, a lower clamping plate and an upper clamping plate which are arranged on a mounting seat of the axle box body, and a steel spring is clamped between the lower clamping plate and the upper clamping plate. A groove around the positioning guiding column is arranged at the lower clamp plate; and a rubber spring is sleeved in the groove and the on the positioning guiding column; the