Method and device for working materials using plasma-inducing laser radiation

US5869805A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Eckhard Beyer · Alsbach, DE
• Jorg Beersiek · Aachen, DE
• Wolfgang Schulz · Wunstorf, DE
• Holger Nitsch · Mönchengladbach, DE
• Peter Abels · Alsdorf, DE

Key dates

• Filing date: Jun 5, 1997
• Grant date: Feb 9, 1999
• Expiry date: Jun 5, 2017

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K26/0665
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A process for material working with plasma induced by high-energy radiati especially laser radiation, in which the radiation originating from the region of the workpiece is observed along the axis of the laser radiation focused along the axis on the workpiece as a function of the time. To obtain a measure of the penetration depth of the vapor capillary in the workpiece the process is so carried out that exclusively the cross section of the vapor capillary is observed with a depth of field encompassing the entire workpiece thickness, and that the mean value of the intensity of the plasma radiation is used as a measure of the penetration depth.