Laser Parameter Determination via Crack Speed Analysis

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Solution Overview

Problem

Current laser processing technologies face challenges in determining the influence of laser processing parameters automatically and efficiently, leading to subjective evaluations, high machine downtimes, and unsatisfactory cut quality due to deviations in the laser beam profile.

Innovation Solution

A method for automatically determining the influence of laser processing parameters by conducting line-shaped laser processing at varying parameter values, detecting processing breaks, and analyzing relationships between processing lengths, times, and tear-off speeds to identify optimal parameter settings, using sensor systems and machine control for fully automated operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If expensive measuring equipment and specialist expertise are used to determine laser processing parameters, then measurement precision is improved, but device complexity and loss of time increase

Engineering Contradiction:

Improvelaser processing parameter determinationVSAvoidmeasuring equipment

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The laser processing machine automatically determines its own parameter relationships by performing self-tests and evaluating results through machine control, eliminating the need for external expensive measuring equipment and specialist intervention

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces complex mechanical measuring equipment with a computational approach using machine control algorithms that analyze processing results to automatically determine parameter relationships

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If manual determination of laser processing parameters is performed, then measurement precision can be maintained, but loss of time and productivity decrease

Engineering Contradiction:

Improveparameter determination accuracyVSAvoidmachine downtime

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The machine automatically performs parameter determination through self-tests and result evaluation without requiring manual intervention, eliminating both time loss and maintaining precision through systematic automated procedures

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system performs preliminary self-tests and data collection automatically to establish parameter relationships before actual production, preventing time loss during operational phases

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If laser processing is performed without automated parameter determination, then device complexity is reduced, but manufacturing precision deteriorates due to subjective evaluation

Engineering Contradiction:

Improveparameter determination systemVSAvoidcut quality

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The machine control system automatically evaluates processing results and uses this feedback to determine optimal parameter relationships, eliminating subjective evaluation and ensuring consistent manufacturing precision

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces subjective manual evaluation with automated computational analysis that objectively determines parameter relationships based on measured processing results

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Productivity

If fully automated laser processing is implemented, then productivity is improved, but reliability decreases due to inability to detect processing interruptions

Engineering Contradiction:

Improveautomation levelVSAvoidprocessing interruption detection

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system continuously monitors processing results and provides feedback to detect interruptions or deviations, maintaining reliability through automated quality control even at high productivity levels

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces manual monitoring with automated sensor systems and machine control algorithms that detect processing interruptions and parameter deviations without human intervention

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP3917714B1Method for automatically determining the influence of a laser machining parameter on a laser machining process, and laser machining machine and computer program product

Publication Date: 2024.01.17 TRUMPF LASER & SYSTEMTECHNIK SE

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AI summary

The method according to the invention for determining the influence of a laser machining parameter on a laser machining process by means of a laser beam (5) comprises the following steps: (a) carrying out, in particular automatically carrying out, linear laser machining processes (12) at different values (W1 to W5) of the laser machining parameter, wherein the feed rate (v) of the laser beam (5) is increased in each of the laser machining processes (12) at least until a machining crack occurs; and (b) determining, in particular automatically determining, the relationship between the machining lengths (L), the associated machining times (t) or the associated crack speeds (vA) of the laser machining processes (12) and the laser machining parameter on the basis of the measured machining lengths (L1 to L5), the associated machining times (t1 to t5) or the associated crack speeds (vA,1 to vA,5) of the laser machining processes (12).