Laser Scanning Housing Angle Control for Uniform Steel Sheet Processing
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Solution Overview
Problem
The existing steel sheet processing methods face challenges in maintaining uniform laser beam focus and preventing stress concentration and meandering during magnetic domain control, leading to potential fractures when the support roll is inclined to adjust for equal distances from the light source.
Innovation Solution
A steel sheet processing apparatus with a laser irradiation unit that includes an angle adjustment mechanism to change the housing's angle with respect to the steel sheet, ensuring the laser beam is focused uniformly across the scanning length without inclining the support roll, thus maintaining consistent tension and preventing defocus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the support roll is inclined to make the distance from the light source point to the steel sheet equal at both ends in the scanning direction, then the laser beam focus is improved, but the steel sheet tension becomes uneven causing meandering and potential fracture
Solution Approach 1:
Instead of inclining the support roll to achieve equal distance from light source to steel sheet, the patent inverts the approach by keeping the support roll horizontal and inclining the laser irradiation unit housing. This allows the laser beam to be focused uniformly across the scanning width without affecting the steel sheet tension and causing meandering or fracture.
Solution Approach 2:
The patent separates the functions of support and laser irradiation by independently controlling the orientation of the laser irradiation unit housing relative to the support roll. The housing can be inclined at a specific angle (e.g., 5 degrees) to achieve proper laser focus while the support roll remains horizontal to maintain uniform steel sheet tension.
2Strength
If the linear groove direction is parallel to the sheet width direction to prevent stress concentration, then the steel sheet strength is improved, but the laser beam reflects back to the irradiation unit causing damage
Solution Approach 1:
The patent introduces asymmetry by inclining the laser irradiation unit housing at an angle (e.g., 5 degrees) relative to the steel sheet surface. This asymmetric positioning ensures that the laser beam irradiates the steel sheet at an angle that prevents regular reflection back to the irradiation unit, while the linear groove direction can be controlled to be parallel to the sheet width direction for strength.
3Manufacturing precision
If the housing angle is adjusted to focus the laser beam uniformly across the scanning length, then the manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
The patent incorporates an angle adjustment mechanism that allows the housing to be dynamically adjusted to a specific inclination angle. This dynamic adjustment capability enables precise focusing of the laser beam uniformly across the scanning length while maintaining the ability to adapt to different processing requirements.
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 allows for stable formation of grooves and residual stress regions on the steel sheet by maintaining equal distance from the light source to the steel sheet surface, reducing the risk of meandering and fractures, and ensuring uniform processing across the entire width.
Implementation Method 1
a laser irradiation unit configured to focus the laser beam on the steel sheet and irradiate the steel sheet in this manner
Implementation Method 2
irradiating a laser beam on the steel sheet to form grooves or residual stress regions
Data Source
AI summary
The present steel sheet processing apparatus includes one or more support rolls and a laser irradiation unit. The laser irradiation unit includes a laser output unit, a laser scanning unit, a focusing optical unit, a housing, and an angle adjustment unit that changes an angle of the housing with respect to a steel sheet. When a surface of the steel sheet is scanned with a laser beam, the angle adjustment unit changes the angle of the housing in a plane formed by a normal direction of the steel sheet surface and a scanning direction so that a distance from the focusing optical unit to the surface of the steel sheet of the laser beam focused by the focusing optical unit is equal over a total length of a scanning region of the laser beam on the surface of the steel sheet. The laser irradiation unit irradiates the laser beam in a state in which the angle of the housing is changed by the angle adjustment unit to form grooves or residual stress regions on the surface of the steel sheet.