Energy Beam Focus Control for High-Speed Grain-Oriented Steel Processing
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Solution Overview
Problem
Increasing the production line speed for non-heat-resistant magnetic domain refining of grain-oriented electrical steel sheets leads to a decrease in thermal strain introduction, affecting iron loss improvement, and existing methods to increase energy beam output face equipment failure or increased costs.
Innovation Solution
Adjusting energy beam focus setting values according to production line speed and processing interval times to maintain thermal strain introduction, using at least two focus setting values that depend on scan speed, scan range, and number of irradiations per unit time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the production line speed is increased to improve productivity, then productivity is improved, but the amount of thermal strain introduced decreases and iron loss improvement effect deteriorates
Solution Approach 1:
The focus setting value of the energy beam is made dynamic and adjustable according to the production line speed. As the line speed increases, the focus setting value is changed to compensate for the reduced thermal strain introduction time, thereby maintaining effective magnetic domain refining across different productivity levels
Solution Approach 2:
The focus setting value parameter is changed in response to production line speed variations. By adjusting this parameter, the energy beam's focal characteristics are modified to ensure adequate thermal strain is introduced even at higher speeds, resolving the contradiction between productivity and processing effectiveness
2Manufacturing precision
If the output power of energy beam is increased to maintain thermal strain introduction at high speed, then thermal strain introduction is maintained, but equipment failure risk increases for lasers or production cost increases for electron beams
Solution Approach 1:
Instead of increasing output power, the focus setting value parameter is changed to optimize energy distribution. This parameter adjustment allows maintaining effective thermal strain introduction at high speeds while operating within safe power limits, avoiding equipment failure risks
Solution Approach 2:
The solution replaces the mechanical approach of simply increasing power output with a optical/focus-based approach. By adjusting the focus setting value, the system achieves the same thermal effect through improved energy concentration rather than brute force power increase, thereby maintaining reliability
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
Stabilizes iron loss improvement effects and enhances production efficiency by suppressing the decrease in thermal strain introduction during high-speed operations.
Implementation Method 1
introducing thermal strain by irradiating the electrical steel sheet after secondary recrystallization with a high-energy beam such as a laser, electron beam, or plasma flame
Implementation Method 2
irradiating with a high-energy beam such as a laser, electron beam, or plasma flame
Data Source
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AI summary
Provided is a means to suppress a decrease in the amount of thermal strain when production line speed is increased, and to both improve production efficiency and stabilize an iron loss improvement effect during operation. The means is a method of surface processing a metal material or a metal sheet including irradiating the surface of the metal material or the metal sheet with an energy beam under at least two focus settings.