Method for producing a piston ring
AssigneeFederal-Mogul Burscheid GmbH
InventorsJohannes Esser, Hans-Gerd Kroeschel, Steffen Hoppe
Life of this patent
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Abstract
Method for producing a piston ring having an axial height <2 mm, said piston ring having a radially outer running surface provided with at least one rail, a radially inner circumferential surface, and upper and lower flank surfaces extending therebetween, wherein said rail is provided with a contour that is tapered radially outwardly, thereafter the running surface, together with the flanks of the tapered rail, is provided with at least one wear-resistant layer, and then only the flank of the rail that is to form a scraping edge is subjected to at least partial material removal to form the scraping edge.
Claims7
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.
Dependencies are inferred from the claim text.