Laser Cutting Parameter Control for Variable Material Quality

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Solution Overview

Problem

The quality of laser-cut workpiece parts is adversely affected by variations in the quality of the raw material, particularly due to changes in material condition such as corrosion, leading to issues like burr length, surface roughness, and uncontrolled burn-out.

Innovation Solution

A method that involves ascertaining material quality parameters of the workpiece, determining laser cutting parameters based on these parameters, and adjusting the cutting process to achieve a predetermined target quality by using sensors, cameras, and machine learning to optimize laser cutting settings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional laser cutting is performed without material quality assessment, then the cutting process is simple and fast, but the quality of the workpiece parts deteriorates due to material variations such as corrosion

Engineering Contradiction:
Improveworkpiece part qualityVSAvoidcutting process complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The system performs preliminary assessment of material quality parameters (such as corrosion state) before the laser cutting process begins. This advance detection allows the control unit to pre-determine appropriate laser cutting parameters based on the actual material condition, ensuring high workpiece quality without adding complex real-time adjustments during cutting

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system incorporates a feedback mechanism where detection devices measure material quality parameters and feed this information back to the control unit. The control unit then adjusts laser cutting parameters based on this feedback, creating a closed-loop system that maintains consistent workpiece quality despite material variations

Inventive Principle:
Principle #23Feedback

2Manufacturing precision

If fixed laser cutting parameters are used, then the cutting process is simple to operate, but the quality consistency deteriorates when material conditions vary

Engineering Contradiction:
Improvequality consistencyVSAvoidparameter adjustment complexity
Core Design Contradiction:
Manufacturing precisionVSEase of operation

Solution Approach 1:

The system enables itself to automatically determine optimal laser cutting parameters based on detected material quality parameters. The control unit autonomously adjusts cutting parameters without requiring manual intervention or complex operator input, maintaining quality consistency while preserving ease of operation

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system dynamically changes laser cutting parameters (such as power, speed, focal position) based on detected material quality variations. This adaptive parameter adjustment ensures consistent workpiece quality across different material conditions without requiring complex manual parameter tuning

Inventive Principle:
Principle #35Parameter changes

3Manufacturing precision

If material quality parameters are ascertained and cutting parameters are adapted, then workpiece part quality is maintained, but the processing time increases due to additional measurement and adjustment steps

Engineering Contradiction:
Improveworkpiece part qualityVSAvoidprocessing time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

Material quality assessment is performed preliminarily before cutting begins, allowing parameter optimization to be completed in advance. This approach minimizes additional processing time during the actual cutting operation while still ensuring high workpiece quality through pre-determined optimal parameters

Inventive Principle:
Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Ensures high-quality laser cutting by adapting the process to material and machine conditions, reducing defects and improving efficiency by maintaining consistent workpiece part quality.

Implementation Method 1

laser cutting of workpiece parts from at least one workpiece using a laser beam of a laser cutting machine

Methodology Applied
Scientific EffectLaser heating: Laser

Data Source

PatentUS20250205825A1Method and laser cutting machine for the laser cutting workpiece parts from a workpiece
Publication Date: 2025.06.26 TRUMPF WERKZEUGMASCHINEN GMBH & CO KG
  • US20250205825A1 patent drawing
  • US20250205825A1 patent drawing
  • US20250205825A1 patent drawing

AI summary

A method for laser cutting of workpiece parts from at least one workpiece using a laser beam of a laser cutting machine includes ascertaining at least one material quality parameter of a material quality of the at least one workpiece, determining at least one laser cutting parameter for the laser cutting of the workpiece parts based on the at least one material quality parameter, and performing the laser cutting of the workpiece parts from the at least one workpiece using the laser beam of the laser cutting machine using the at least one laser cutting parameter.