Method for introducing surface structure i.e. fluid dynamic bearing structure, on inner surface of cylindrical bushing, involves unloading bushing from external force, and extending mandrel towards bushing

摘要

The method involves applying external force (20) from a side of a bushing (18) to a mantel surface of the bushing such that the bushing is elastically deformed. The bushing is constantly rotated under retention of the external force that passes an inner surface of the bushing to an upper surface of a mandrel (10) and impresses the upper surface of the mandrel on the inner surface of the bushing over circumference of a plastic. The bushing is unloaded from the external force, and the mandrel is extended towards the bushing. The bushing is utilized relative to soft material i.e. bronze and sinter material i.e. plastic. An independent claim is also included for a device for executing a method for introducing a surface structure on an inner surface of a cylindrical bushing, comprising a mandrel.