Laser rounding and flattening of cylindrical parts

US7416621B2 · kind B2 · utility

Assignee

• GKN Sinter Metals, LLC · DE

Inventor

• Henry J. Knott · Ypsilanti, US

Key dates

• Filing date: Jul 22, 2005
• Grant date: Aug 26, 2008
• Expiry date: Jan 4, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D10/005
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method is disclosed for rounding and/or flattening an annular part that is out of round and/or not flat due to non-uniform internal stresses. The part is first checked for out of round and/or out of flat conditions. Out of round parts are then rounded by introducing compressive stresses into selected surface sections of the part whereby the introduced compressive stresses cause deformation of the annular part thereby rounding the annular part. Alternatively, out of round parts are rounded by relieving compressive stresses in selected surface sections of the part whereby the relieving of compressive stresses causes deformation of the annular part thereby rounding the annular part. Out of flat parts are flattened by introducing compressive stresses into selected surface sections of the part whereby the introduced compressive stresses cause deformation of the annular part thereby flattening the annular part. Alternatively, out of flat parts are rounded by relieving compressive stresses in selected end surface sections of the part whereby the relieving of compressive stresses causes deformation of the annular part thereby flattening the annular part.