Cutting gas nozzle and laser cutting method having a displaceable sleeve for setting the flow characteristics

US10603745B2 · kind B2 · utility

Assignee

• TRUMPF Werkzeugmaschinen GmbH + Co. KG · DE

Inventors

• Martin Bea · Gerlingen, DE
• Tim Hesse · Ditzingen, DE

Key dates

• Filing date: Oct 26, 2017
• Grant date: Mar 31, 2020
• Expiry date: Oct 26, 2037

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K26/70
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

This disclosure describes laser machining head cutting gas nozzles that include an inner nozzle having a nozzle opening configured to form a core gas flow, an outer nozzle having an annular gap surrounding the nozzle opening and configured to form an annular gas flow, and a sleeve in the annular gap, wherein the sleeve is arranged to be axially displaceable between a rearward position and a forward position, wherein the sleeve projects beyond the inner nozzle at least when in the forward position, and wherein the sleeve widens a cross-sectional area of the outer nozzle to a variable degree as the sleeve is displaced from the rearward to the forward position. Methods of using a cutting gas nozzle are also described.