Patent ID: 8973262
Filing Date: 2015-03-10
Classification: B23P,F16J,Y10T

Abstract:
1. A method for producing a piston ring of axial height <2 mm, comprising: providing, for further processing, a piston ring body of axial height <2 mm and comprising a circumferential rail, the circumferential rail having a radially outer circumferential surface which defines a radially outer circumferential surface of the piston ring body, the piston ring body also having a radially inner circumferential surface and piston ring upper and lower ring flanks extending between the radially outer and radially inner circumferential surfaces, the circumferential rail tapering in axial width parallel to an axis of the piston ring body and flanks of the rails converging toward each other as radial distance from the axis of the piston ring body increases; providing at least one wear-resistant layer on the radially outer circumferential surface and the rail flanks; and removing the at least one wear-resistant layer only in an area of each of the rail flanks which is contiguous with the radially outer circumferential surface thereby to provide a scraping edge at said a transition area.