Patent ID: 8814028
Filing Date: 2014-08-26
Classification: F16C,F16D,Y10T

Abstract:
1. A manufacturing method for a propeller shaft comprising a first shaft having a cylindrical portion joined to a surface treated member and a second shaft which is slidably connected to the first shaft through the surface treated member, the second shaft having first splines, the method comprising steps of: forming the surface treated member of a substrate which is separate from the first shaft and the second shaft, wherein the surface treated member has an axial end portion with a bulging portion having a first diameter and a second portion with a second smaller diameter; treating a surface of the surface treated member with a surface treatment for improving the slidability of the second shaft with the surface treated member, the surface treated member having second splines to which the treatment is applied; forming the first shaft, wherein the cylindrical portion also has an axial end portion with a bulging portion having a first diameter and a second portion with the second smaller diameter; joining the surface treated member and the first shaft by friction welding; removing the bulging portions together with a burr produced by the friction welding with a deburring process, after the deburring process each of the bulging portions having a second outer diameter equal to the second smaller diameter of the second portions: and connecting the surface treated member and the second shaft to each other by slidably engaging the first splines and the second splines with each other.