Laser Steel Strip Texturing Without Roll Replacement
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Solution Overview
Problem
Conventional steel strip texturing methods require frequent replacement of texture transfer rolls, are limited in texture variation, and cannot efficiently apply different textures across the width and length of the strip without interrupting the rolling process, especially with high-strength steels.
Innovation Solution
Laser texturing using pulsed or continuous wave laser beams that modify the steel strip surface without direct mechanical contact, allowing for independent control of multiple laser beams to apply various patterns simultaneously and adjust for rolling speed and strip deviations, enabling flexible and cost-effective texture application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If texture transfer rolls are used to apply texture to steel strip, then texture can be transferred to the strip surface, but the rolls wear out and become fouled requiring frequent replacement and renewal
Solution Approach 1:
The patent replaces the mechanical contact-based texture transfer roll system with a laser-based texturing system. The laser beam directly modifies the steel strip surface through ablation or melting without requiring physical contact, eliminating wear and fouling issues associated with texture transfer rolls.
Solution Approach 2:
Instead of using a physical texture transfer roll that copies the texture pattern, the patent uses laser technology to directly create the desired texture pattern on the steel strip surface. The laser system can replicate various texture patterns without requiring a physical master roll, eliminating the wear and replacement cycle of texture transfer rolls.
2Adaptability or versatility
If texture transfer rolls are used, then texture can be applied to the strip, but changing textures requires roll replacement resulting in production losses
Solution Approach 1:
The patent employs a dynamic laser texturing system where the laser beam parameters (power, pulse duration, scanning speed, pattern) can be rapidly adjusted and changed during production. This allows different texture patterns to be applied without stopping the production line or replacing equipment, enabling quick adaptation to different texture requirements while maintaining continuous production.
3Adaptability or versatility
If conventional single stand rolling mills are used, then temper rolling can be performed, but different textures cannot be applied on different locations of the strip
Solution Approach 1:
The patent applies laser texturing technology that can be positioned and controlled to treat different sections of the steel strip independently. The laser system can be programmed to apply different texture patterns to different locations (width, length, top/bottom surfaces) by controlling the laser beam path and parameters, enabling location-specific texturing without requiring multiple rolling stands or complex mill configurations.
4Strength
If texture transfer rolls are used with high strength steels, then texturing can be performed, but the limited stand time becomes a larger drawback
Solution Approach 1:
The patent replaces the mechanical texture transfer roll system with a laser-based texturing system that does not involve physical contact with the steel strip. This eliminates the wear and fouling problems that occur with texture transfer rolls when processing high strength steels, allowing for extended operational duration without roll replacement or maintenance.
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 continuous texturing without roll replacement, allows for varied textures across the strip width and length, and operates at industrial rolling speeds with reduced production losses and costs, maintaining surface quality and mechanical properties.
Implementation Method 1
Laser texturing using pulsed or continuous wave laser beams that modify the steel strip surface
Implementation Method 2
pulsed or continuous wave laser beams that modify the steel strip surface
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 2(c)~2(d)
AI summary
The invention relates to a method and an arrangement for finishing a steel strip comprising the texturing of the steel strip wherein a texture is applied to the surface of a moving steel strip by means of a single laser beam or a plurality of laser beams directed at the surface of a moving steel strip, and wherein the single laser beam or the plurality of laser beams are position controlled to apply a predetermined texture pattern on the surface of the moving steel strip.