Process for producing grooves in metallic bodies

US3954582A · kind A · utility

Assignee

• Dornier System GmbH

Inventors

• Wolfgang Hepp · Alzey, DE
• Klaus Pimiskern · Daisendorf, DE
• Werner Herbert · Markdorf, DE

Key dates

• Filing date: Feb 24, 1975
• Grant date: May 4, 1976
• Expiry date: Feb 24, 1995

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/00
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

This invention relates to a process for producing helical oil grooves in a spherical metallic body, for example for a spiral groove bearing, which comprises exposing a photographic lacquer on the surface of said body to light under a pattern, developing the resulting image, and electrochemically etching and then chemically etching grooves in said body in the non-image areas, whereby pressure-building spiral grooves are produced having a planar groove bottom, straight walls, sharply right-angled edges, and a depth in the range of about 1 to 20 microns.