Laser Processing Feedback Control for Real-Time Condition Adjustment
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Solution Overview
Problem
Existing laser processing techniques require a large number of processing and quality evaluations to associate target deviations in assist gas pressure loss or flow rate with adjustments in laser processing conditions, making it difficult to achieve good processing results.
Innovation Solution
A laser processing apparatus with a control device, detection unit, parameter estimation unit, condition change amount determination unit, and parameter update unit that continuously monitors processing states and adjusts conditions in real-time based on parameter estimates and target values, allowing for easier adjustment of processing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If learning is performed by associating target deviation of assist gas pressure loss or flow rate and adjustment of laser processing condition through a large number of processing and quality evaluations, then processing quality can be improved, but the adjustment of laser processing condition becomes difficult and time-consuming
Solution Approach 1:
The system performs preliminary learning by associating target deviation of assist gas pressure loss or flow rate with adjustment of laser processing condition through a large number of processing and quality evaluations beforehand. This pre-acquired knowledge is stored and reused, eliminating the need to repeat the same learning process for each new processing task, thus reducing the time required for adjustment while maintaining high processing quality.
2Reliability
If processing conditions are adjusted based on real-time observation of processing state, then processing defects can be reduced, but the complexity of the system increases
Solution Approach 1:
The system observes the processing state in real-time during laser processing and uses this feedback information to adjust processing conditions. By implementing a feedback mechanism that continuously monitors processing state and makes necessary adjustments, the system reduces processing defects while managing complexity through automated control algorithms that process the observed data and generate appropriate condition modifications.
Data Source
AI summary
A laser processing apparatus includes a control device controlling laser processing in accordance with processing condition; a detection unit observing processing state on a time-series basis during laser processing and outputting a signal corresponding to observation result as a time-series signal; a parameter estimation unit estimating and outputting, based on first time-series signal data including the time-series signal and/or a first feature computed from the time-series signal and preset corresponding parameter information indicating relationship between the first time-series signal data and at least one parameter value included in the processing condition, a parameter estimate corresponding to the first time-series signal data; a condition change amount determination unit comparing a target parameter value and the parameter estimate and determining a change amount for the processing condition based on comparison result; and a parameter update unit updating the processing condition based on the change amount and the processing condition.