Surface-mounted magnetic lead screw and processing method thereof

The invention discloses a surface-mounted magnetic lead screw and a processing method thereof, and belongs to the field of magnetic lead screws. The magnetic lead screw comprises segmented permanent magnets, an electric iron rod and limiters. A magnetic nut comprises segmented permanent magnets and an electric iron ring. In the magnetic lead screw, the segmented permanent magnets are mounted on the outer surface of the electric iron rod; and in the magnetic nut, the segmented permanent magnets are mounted on the inner surface of the electric iron ring. The method comprises the following steps of leveling the inner diameters of the segmented permanent magnets of the magnetic lead screw; turning the outer surface of the electric iron rod to form the electric iron rod of which the axial section is a regular polygon according to the size of the segmented permanent magnets and simultaneously installing the limiters at the end parts of the electric iron rod; and leveling the outer diameters of the segmented permanent magnets of the magnetic nut, and drilling the electric iron ring to form a through hole of which the axial section is a regular polygon according to the size of the segmented permanent magnets. Through cooperation of the permanent magnets and a ferromagnetic material, the processing difficulty of a spiral permanent magnet and the assembly difficulty of the magnetic lead screw can be effectively reduced; and the thrust density and the mechanical strength are improved.