Laser Processing Head Defect Cause Estimation by Section Analysis
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Solution Overview
Problem
Conventional laser processing systems struggle to accurately detect and estimate the cause of processing defects, leading to inefficient production and maintenance, as they primarily focus on monitoring and classifying processed states rather than analyzing changes in these states.
Innovation Solution
A laser processing apparatus equipped with a detection unit that observes the workpiece and outputs time series signals, a processed state observation unit that evaluates the workpiece's state, and an estimation unit that analyzes evaluation information from multiple sections to determine the cause of defects, allowing for real-time adjustment of processing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional monitoring and classification of processed state is used, then processing defects can be detected, but the cause of defects cannot be accurately estimated
Solution Approach 1:
The processing path is divided into multiple sections, and evaluation information is obtained for each section independently. This segmentation allows the system to track changes in processed state across different sections, enabling cause estimation by comparing evaluation information between sections rather than treating the entire processing path as a single unit.
Solution Approach 2:
The invention adds a temporal dimension to defect analysis by obtaining evaluation information for multiple sections along the processing path. This transforms the analysis from a single-point-in-time assessment to a multi-point temporal sequence, allowing the estimation unit to detect changes and trends that indicate defect causes.
2Measurement precision
If visual checking upon completion is used, then defects can be detected, but production efficiency decreases due to delayed detection
Solution Approach 1:
The detection unit observes the workpiece during processing and obtains evaluation information for each section in real-time, rather than waiting until processing is complete. This preliminary detection allows for immediate identification of defects and their causes, enabling timely corrective actions that prevent further defective production and improve overall productivity.
3Adaptability or versatility
If state quantity monitoring is used, then processing conditions can be adjusted, but machine maintenance cannot be properly performed due to inability to estimate defect causes
Solution Approach 1:
The estimation unit provides feedback about the cause of defects based on comparison of evaluation information from multiple sections. This feedback mechanism not only enables processing condition adjustments but also guides maintenance activities by identifying specific causes such as nozzle issues, optical system problems, or workpiece state issues, making maintenance more targeted and effective.
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
Enables accurate estimation of defect causes during processing, reducing the number of defective products and improving production efficiency by enabling timely maintenance and adjustment of processing conditions.
Implementation Method 1
a laser oscillator that emits a laser beam
Implementation Method 2
an optical system that focuses the laser beam onto a workpiece
Implementation Method 3
a detection unit that observes a state of the workpiece being processed and outputs a result of observation as a time series signal
Data Source
AI summary
A laser processing apparatus includes a laser oscillator; a processing head; a driver that controls a relative positional relationship between a workpiece and the processing head; control circuitry that controls the laser oscillator and the driver in order for the laser beam to scan a processing path on the workpiece; detection circuitry that observes a state of the workpiece being processed and outputs a result of observation as a time series signal; processed state observation circuitry that obtains evaluation information including a determination result that indicates whether a processed state of the workpiece is satisfactory or defective by evaluating the processed state of the workpiece on the basis of the time series signal for each of a plurality of sections obtained by dividing the processing path; and estimation circuitry that estimates a cause of a defect on the basis of the evaluation information of two or more of the sections.