Laser cutting method

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The laser cutting process addresses the complexity of determining gas indices by using a nitrogen-oxygen mixture with oxygen content based on material thickness, reducing burr formation and enhancing process reliability and quality for thick materials.

WO2026124916A1PCT designated stage Publication Date: 2026-06-18TRUMPF WERKZEUGMASCHINEN GMBH & CO KG

Patent Information

Authority / Receiving Office: WO · WO
Patent Type: Applications
Current Assignee / Owner: TRUMPF WERKZEUGMASCHINEN GMBH & CO KG
Filing Date: 2025-11-17
Publication Date: 2026-06-18

AI Technical Summary

⚠Technical Problem

Existing laser cutting methods for thick materials require complex calculations and high computational effort to determine the process gas index, leading to increased potential for errors and reduced process reliability and quality, particularly due to undesirable burr formation.

⚗Method used

A laser cutting process that determines the oxygen content of a nitrogen-oxygen process gas solely based on the material thickness, minimizing burr formation by using a predetermined range bounded by maximum and minimum curves, thereby simplifying the method and enhancing process reliability and quality.

🎯Benefits of technology

The method significantly reduces burr formation and maintains high process quality by using a nitrogen-oxygen mixture with oxygen content dependent only on material thickness, making cutting of thicker materials economically viable and efficient.

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Figure EP2025083242_18062026_PF_FP_ABST

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Abstract

The invention relates to a laser cutting method (10) for severing a planar workpiece (12) having a material thickness (16) of at least 4 millimeters, which is to be severed by a laser beam (14), the method comprising the following steps: - providing the material thickness (16) of the workpiece (12); - determining an oxygen content (24) of a process gas (28) that can be fed into the process zone (26) of the laser beam (14), exclusively on the basis of the material thickness (16) of the unmachined workpiece (12); - mixing the process gas (28) in such a way that the process gas (28) has the determined oxygen content (24) and nitrogen; and - laser cutting the workpiece (12) by means of the laser beam (14) while supplying the process gas (28) into the process zone (26) of the laser beam (14).

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