Method for producing a piston ring

摘要

A piston ring, is produced by providing, on the radially outer circumferential surface of a ring-shaped metallic main body, a recess, the metallic main body having a radially outer circumferential surface, a radially inner circumferential surface, and flank surfaces interposed therebetween providing the recess with a contour that deviates from a cylindrical shape at least on the bottom of the recess, providing at least one wear-resistant layer on the outer circumferential surface, including the recess, and at least partially removing an area of the at least one wear-resistant layer on the outer circumferential surface and including an area corresponding to a scraping edge, thereby forming a land having a predefinable width.

主权项

1. A method of producing a piston ring, comprising:
producing a ring-shaped metallic main body, the main body having a radially outer circumferential surface, a radially inner circumferential surface and upper and lower flank surfaces interposed therebetween; providing a recess on the outer circumferential surface, a base surface of the recess adjacent the upper flank being contoured so that said base surface is non-cylindrical; providing at least one wear-resistant layer on at least the outer circumferential surface; and partially removing the at least one wear-resistant layer to form a running surface of the piston ring including a land of predetermined width from which the at least one wear layer has been removed, with the piston ring having a scraping edge contiguous with the land and with the lower flank, wherein the wear-resistant layer is a multilayer system including a layer provided by nitriding and a topcoat provided by physical vapor deposition (PVD), and wherein an intervening surface occurs between a distal scraping surface of said land and the base surface of said recess.