Method and tool for improving the structure of the inner faces of working chambers of machines and motors

US5655955A · kind A · utility

Assignee

• Nagel Maschinen- und Werkzeugfabrik GmbH · DE

Inventors

• Wolf Nagel · Leverkusen, DE
• Hans Kuhn · Hamburg, DE

Key dates

• Filing date: Jul 29, 1994
• Grant date: Aug 12, 1997
• Expiry date: Jul 29, 2014

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J10/02
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In place of conventional machining of cylinder paths or tracks of piston engines, a honing machining without a rotary component is performed at least as a final machining operation so that the remaining small honing tracks are directed longitudinally and consequently permit an improved running-in behavior in conjunction with the piston rings. A preferred honing tool this has honing segments taking up a large circumferential portion and which are preferably resiliently constructed in Such a way that they automatically adapt to the cylinder path. A coating of components in the vicinity or working chambers, such as internal combustion chambers, e.g. of piston rings, comprises a chemically inert, anti-adhesive metal, such as e.g. niobium or zirconium. It is applied in a target process in vacuo and has a small thickness of approximately 8 micrometers. Together with the final machining by honing in the axial direction and in conjunction with a corresponding cylinder path, there is an improved running-in behavior, lower pollutant formation, better sealing and oil scraping.