Interchangeable Roll Cassettes for Sheet Leveling
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Solution Overview
Problem
Conventional roller levelers struggle to effectively flatten thin sheet materials with high yield stress, as they either damage equipment or fail to provide sufficient torque, and often result in surface defects like edge waves and lateral warps, while also being inadequate for thick materials due to limited leveling range and surface quality issues.
Innovation Solution
A leveler equipment with interchangeable roll cassettes, allowing it to function as either a roller leveler or a tension leveler, using large-diameter rolls for thick materials and small-diameter rolls for thin high-yield stress materials, with adjustable bridle rolls to apply pressing or tensile forces as needed, enabling three operational modes based on material thickness and yield stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If large-diameter leveling rolls are used to ensure safety for thick sheet material, then the strength and safety are improved, but the ability to sufficiently level thin sheet material with high yield stress deteriorates
Solution Approach 1:
The patent employs dynamically adjustable roll pitch and interchangeable roll configurations that allow the system to adapt between large-diameter rolls for thick materials and small-diameter rolls for thin materials with high yield stress, resolving the contradiction between strength requirements and leveling capability across different material types
Solution Approach 2:
The system changes critical parameters including roll diameter, roll pitch, and applied force magnitude based on material thickness and yield stress characteristics, enabling the same equipment to effectively level both thick and thin materials by adjusting these parameters rather than requiring different equipment for each material type
2Adaptability or versatility
If small-diameter leveling rolls are used to sufficiently flatten thin sheet material with high yield stress, then the leveling capability is improved, but the risk of damaging rolls and bearings due to large flattening reaction force increases
Solution Approach 1:
The system dynamically adjusts the roll pitch and interchangeably uses different roll configurations based on material properties, allowing small-diameter rolls to be used only when appropriate for the material being leveled, thereby maintaining both leveling capability and equipment durability through conditional, adaptive operation
Solution Approach 2:
The patent implements a control system that selects appropriate roll configurations and pitch settings before the leveling process begins, preventing excessive reaction forces from damaging the equipment by pre-configuring the system with parameters suitable for the specific material being processed
3Reliability
If the roll pitch is set according to the maximum thickness within the requirement range, then the safety for thick materials is ensured, but the ability to level thin sheet material deteriorates
Solution Approach 1:
The patent implements a dynamically adjustable roll pitch mechanism that can be reconfigured based on the thickness of the material being leveled, allowing the system to use larger pitch values for thick materials and smaller pitch values for thin materials, thereby maintaining both safety and leveling capability across the full range of material thicknesses
4Device complexity
If a roller leveler is used to flatten thin sheet material, then the equipment simplicity is maintained, but the ability to eliminate edge waves, center buckling, and lateral warps deteriorates
Solution Approach 1:
The patent employs a roller leveler with dynamically adjustable parameters including roll pitch, roll diameter, and applied force that can be optimized for thin sheet materials, allowing the simple roller leveler design to achieve the precision needed to eliminate edge waves, center buckling, and lateral warps through proper parameter selection rather than through complex additional mechanisms
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 solution enables the leveler equipment to handle a wide range of sheet materials in terms of thickness and yield stress, effectively flattening both thin high-yield stress and thick materials without damaging the equipment, while maintaining high surface quality by selectively using the appropriate mode of operation.
Implementation Method 1
a pair of bridle roll units... configured to be able to apply tensile force to the sheet material
Implementation Method 2
a pressing mechanism... configured to be able to apply pressing force to the sheet material
Implementation Method 3
the leveling rolls... to repeatedly bend the sheet material, and thereby to planarize the warping and/or waving of the sheet material
Data Source
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AI summary
Leveler equipment (100) includes a leveler body (10), a first roll cassette (20) for a roller leveler, and a second roll cassette (30) for a tension leveler. The roller leveler is formed when the first roll cassette (20) is attached to the leveler body (10), and the tension leveler is formed when the second roll cassette (30) is attached to the leveler body (10).