Adaptive Laser Scanning for Grain-Oriented Steel Domain Refinement
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Solution Overview
Problem
Existing devices struggle to maintain consistent magnetic domain refinement of grain-oriented electrical steel sheets when the sheet passing speed changes, requiring complex systems to ensure constant speed and limiting operational flexibility.
Innovation Solution
A device that uses high-energy beam irradiation, such as laser or electron beams, with a scanning mechanism that adjusts its orientation and scanning rate to match the sheet passing speed, allowing for flexible operation and reliable magnetic domain refinement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a looper system is introduced to maintain constant sheet passing speed for laser beam irradiation, then magnetic domain refinement consistency is improved, but device complexity and facility cost increase
Solution Approach 1:
The patent applies the Dynamics principle by making the laser beam scanning mechanism adaptive to variable sheet speeds. The scanning mechanism dynamically adjusts its scanning speed and/or beam orientation angle based on the actual sheet passing speed, eliminating the need for constant speed maintenance through complex looper systems while ensuring consistent magnetic domain refinement.
2Adaptability or versatility
If the sheet passing speed is varied for coil exchange and facility adjustment, then operational flexibility is improved, but magnetic domain refinement consistency deteriorates
Solution Approach 1:
The patent enables operational flexibility by allowing variable sheet passing speeds while maintaining refinement consistency through dynamic adjustment of the laser scanning parameters. The scanning mechanism adapts in real-time to speed changes, ensuring consistent magnetic domain refinement regardless of sheet speed variations.
Solution Approach 2:
The patent implements feedback control where the laser scanning mechanism receives information about the actual sheet passing speed and adjusts its scanning parameters accordingly. This feedback loop ensures that magnetic domain refinement consistency is maintained even when sheet speed varies for operational reasons such as coil exchange or facility adjustment.
3Reliability
If a looper system is introduced to maintain constant sheet passing speed, then magnetic domain refinement consistency is improved, but production efficiency and time loss deteriorate
Solution Approach 1:
The patent eliminates production time loss by removing the need for looper systems and constant speed maintenance. The dynamic scanning mechanism allows the sheet to pass at variable speeds including during coil exchange, thereby eliminating idle time while maintaining refinement consistency through real-time parameter adjustment.
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 stable production of grain-oriented electrical steel sheets with low iron loss properties by ensuring consistent magnetic domain refinement even with varying sheet speeds, simplifying facilities and increasing operational freedom.
Implementation Method 1
a technique of irradiating a steel sheet as a finished product with a laser beam to introduce linear high-dislocation density regions into a surface layer of the steel sheet
Implementation Method 2
JP H06-072266 B (PTL 7) proposes a technology of controlling the width of magnetic domains through irradiation of an electron beam
Data Source
AI summary
This device scans a high-energy beam in a direction traversing a feed path of a grain-oriented electrical steel sheet having subjected to final annealing so as to irradiate a surface of the steel sheet being passed through with the high-energy beam to thereby perform magnetic domain refinement, the device including an irradiation mechanism for scanning the high-energy beam in a direction orthogonal to the feed direction of the steel sheet, in which the irradiation mechanism has a function of having the scanning direction of the high-energy beam oriented diagonally, relative to the orthogonal direction, toward the feed direction at an angle determined based on a sheet passing speed of the steel sheet on the feed path.