METHOD OF APPLYING A LUBRICATING AND FRICTION-REDUCING LAYER ON THE INNER SURFACE OF A TUBULAR BODY OF METALLIC MATERIAL

摘要

1284629 Making bearings; drawing HABIA KOMMANDITBOLAG 19 Oct 1970 [20 Oct 1969] 49485/70 Headings B3A and B3P [Also in Division F2] A bearing bush is made by applying a layer of friction reducing material 4 to the inner surface of a tubular metallic member 2 by placing the layer on the surface and deforming the member and layer. During deformation the layer is supported on a pin 3 while a die 1 is moved over the outer surface of the member. The layer is preferably a P.T.F.E. foil. The layer 4 is initially thicker than the desired thickness of the finished layer and is calibrated to size during the deformation. The deformation may employ a calibrating die 1 having an inner diameter smaller than the outer diameter of the tubular member 2 so that the tubular member is calibrated to the desired outer diameter during the deformation. The layer may be adhesively attached to the tubular member, e.g. by gluing with an epoxy resin. The pin 3 may be a shaft coated with a friction reducing material.