Laser Machining Intensity Profiling for Accurate Breakage Thresholds
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Solution Overview
Problem
Current methods for determining the breakage threshold in laser machining are complex and unreliable, as they assume a Gaussian distribution of laser light intensity, which can lead to inaccurate results if the actual distribution is different, and require repetitive experiments to measure the effect of varying laser intensity on material breakdown.
Innovation Solution
A method and device that assess the dependence of laser machining on laser light intensity by acquiring machining state and intensity distribution information, allowing for accurate assessment of the breakage threshold based on actual intensity distribution, regardless of its form, using a combination of a light source, machining state acquisition unit, intensity distribution acquisition unit, and assessment unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional experimental methods are used to determine breakage threshold, then measurement can be performed, but the measurement process becomes very complicated and time-consuming
Solution Approach 1:
The patent replaces the conventional mechanical/optical observation system (microscope-based experimental methods) with an information processing system that uses machining state information and intensity distribution information to calculate breakage threshold. This substitution transforms a complex physical measurement process into a computational assessment process, reducing operational complexity while maintaining measurement precision.
Solution Approach 2:
The patent introduces machining state information and intensity distribution information as intermediary data elements that mediate between the laser machining process and the breakage threshold determination. These intermediaries enable indirect assessment of breakage threshold through information processing rather than direct physical measurement, simplifying the overall measurement system.
2Ease of manufacture
If Gaussian distribution assumption is used for laser intensity, then calculation is simplified, but reliability of breakage threshold is low when actual distribution is non-Gaussian
Solution Approach 1:
The patent changes the fundamental parameter assumption from fixed Gaussian distribution to actual measured intensity distribution. By using intensity distribution information that reflects the true laser beam profile regardless of its form, the system adapts to different distribution types (Gaussian, top-hat, asymmetric, etc.), thereby maintaining reliability across various conditions without sacrificing calculation feasibility through information-based assessment.
3Measurement precision
If repetitive experiments are conducted to measure breakage threshold, then accurate data can be obtained, but measurement time and resource consumption increase significantly
Solution Approach 1:
The patent performs preliminary acquisition of intensity distribution information and machining state information before conducting full breakage threshold experiments. This preliminary action allows the system to pre-process and utilize existing data, reducing the need for extensive repetitive experiments and thereby improving measurement efficiency while maintaining accuracy through informed assessment.
Solution Approach 2:
The patent implements a feedback mechanism where machining state information and intensity distribution information are continuously utilized to assess and refine breakage threshold determination. This feedback approach enables the system to learn from existing data and reduce the need for additional repetitive experiments, thereby improving productivity while maintaining measurement precision.
Data Source
AI summary
The present invention relates to a technique to assess dependence of laser machining on laser light intensity with high accuracy by a simple method. First, machining state information showing a machining state by laser machining at a machining position on a workpiece is acquired. Before or after that, or at the same time as that, intensity distribution information showing intensity distribution of laser light at the machining position is acquired. Dependence of the laser machining of the workpiece on the laser light intensity is assessed based on the acquired machining state information and intensity distribution information. For example, it is possible to acquire a breakage threshold for a workpiece in laser machining in a highly accurate and simply manner.