Grain-Oriented Electrical Steel Sheet With Variable Domain-Refining Intervals
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Solution Overview
Problem
Existing methods for manufacturing grain-oriented electrical steel sheets struggle to adjust deformable portions to match the varying grain sizes, leading to inefficient magnetism and increased energy loss due to non-uniform magnetic domains.
Innovation Solution
The method involves forming a plurality of linear deformable portions on the steel sheet surface, with varying intervals corresponding to grain sizes, and using real-time magnetic flux leakage methods to measure and adjust these intervals to optimize magnetic domain refinement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed interval between deformable portions is used, then the manufacturing process is simple, but the magnetic properties deteriorate due to mismatch with varying grain sizes
Solution Approach 1:
The patent applies the dynamics principle by making the interval between deformable portions variable rather than fixed. The interval is dynamically adjusted to correspond to the grain size at each position along the steel sheet, allowing the system to adapt to varying grain sizes and optimize magnetic domain refinement precision throughout the material.
Solution Approach 2:
The patent implements local quality by applying different intervals between deformable portions to different regions of the steel sheet based on local grain size characteristics. Each region receives a tailored interval that matches its specific grain size, optimizing magnetic properties locally rather than using a uniform approach.
2Manufacturing precision
If real-time grain size measurement is implemented, then the deformable portion intervals can be optimized, but the measurement system complexity increases
Solution Approach 1:
The patent employs feedback by implementing a real-time measurement system that continuously monitors grain size during manufacturing and uses this information to adjust the interval between deformable portions. This closed-loop feedback mechanism ensures that the deformable portion intervals accurately correspond to the actual grain size distribution.
Solution Approach 2:
The patent replaces traditional mechanical measurement methods with a magnetic flux leakage-based measurement system. This substitution enables non-contact, real-time grain size measurement without requiring physical sampling or destructive testing, thereby reducing overall system complexity while maintaining measurement accuracy.
3Measurement precision
If traditional acid immersion method is used for grain measurement, then grain size can be measured clearly, but environmental harm increases and real-time measurement is impossible
Solution Approach 1:
The patent replaces the chemical acid immersion method with a physical magnetic flux leakage measurement system. This substitution eliminates the need for harmful chemicals while enabling real-time, non-destructive grain size measurement, thereby removing environmental harm while maintaining or improving measurement capabilities.
Solution Approach 2:
The patent introduces magnetic flux leakage as an intermediary parameter to measure grain size indirectly. Instead of directly observing grain structure through acid etching, the system measures magnetic flux leakage patterns that correlate with grain size, providing a non-harmful alternative that achieves the same measurement objective.
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
This approach enhances magnetism by optimizing magnetic domain refinement, reducing energy loss and improving magnetic properties by aligning deformable portion intervals with grain sizes, thereby enhancing the efficiency of grain-oriented electrical steel sheets.
Implementation Method 1
a magnetic flux leakage measurement device measuring a grain size of grains of a steel sheet
Data Source
AI summary
A grain-oriented electrical steel sheet includes a plurality of linear deformable portions formed on a surface of the electrical steel sheet in a rolling direction, wherein an interval between the deformable portions changes to correspond to a grain size of grains over the entire length of the steel sheet, and at least two regions in which intervals between the deformable portions are different exist.