Patent ID: 6883358
Filing Date: 2005-04-26
Classification: B21H,B23P,F16D,Y10T

Abstract:
1. A method of producing sliding sleeves for gearshift mechanisms, wherein a preform is pushed onto a tool mandrel provided with an external toothing extending in an axial direction of the tool mandrel, the preform is then formed by means of roller spinning through at least one roll moving axially along the circumferential surface of the preform so as to form an image of the external toothing of the tool mandrel on the inner circumferential surface of the preform, the formed preform is then formed by profile rolling by means of one or a plurality of profiled rolls on its outer circumferential surface by continuously reducing the distance between the axis of said profiled rolls and the axis of said preform so as to obtain a formed part having a profile on the outer circumferential surface thereof, thereby readily obtaining a desired surface hardness at the outer circumference of the sliding sleeve made from the formed part, and the tool mandrel is finally removed from the formed part.