Work Roll Offset Adjustment for Strip Thickness Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current rolling mill systems face challenges in maintaining consistent strip thickness and avoiding defects due to the complex and costly continuous adaptation of work roll offsets, which complicates automatic thickness control and introduces transient phases of adaptation leading to thickness variations.
Innovation Solution
A method and device for automatically adjusting the offset of work rolls relative to support rolls using pre-identified rolling parameters, with a nominal offset maintained throughout the rolling program unless special conditions require a temporary adjustment, based on real-time measurements and predefined threshold values, ensuring compatibility with automatic thickness control systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If continuous adaptation of work roll offset is implemented, then rolling forces are optimized, but automatic thickness control is complicated and strip thickness consistency deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing optimal offset values in a database before rolling operations begin. The system identifies the required offset from stored rolling parameters corresponding to the specific steel grade and rolling conditions, eliminating the need for continuous real-time adaptation during the rolling process. This preliminary preparation resolves the contradiction by providing adaptability through pre-computed values while keeping the control system simple during actual operation.
2Adaptability or versatility
If continuous adaptation of work roll offset is implemented, then rolling forces are optimized, but transient phases of adaptation are introduced causing strip thickness variations
Solution Approach 1:
By pre-calculating offset values and storing them in a database before rolling operations, the system eliminates transient adaptation phases during actual rolling. The offset is directly retrieved from stored parameters matching the steel grade and rolling conditions, ensuring immediate and stable application without thickness variations. This resolves the contradiction by maintaining adaptability through pre-computed values while ensuring manufacturing precision during the rolling process.
3Adaptability or versatility
If complex continuous adaptation systems are used, then offset optimization is improved, but operational reliability decreases
Solution Approach 1:
The patent enhances reliability by pre-calculating and storing optimal offset values in a database before rolling operations. This eliminates complex real-time calculations and continuous adaptation mechanisms that could fail during operation. The system simply retrieves pre-validated offset values from the database based on steel grade and rolling parameters, ensuring consistent and reliable offset control without the risks associated with complex adaptive systems operating in real-time.
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 simplifies offset management, maintains consistent strip thickness, and reduces operational complexity by allowing temporary adjustments only when necessary, enhancing the reliability and efficiency of the rolling process.
Implementation Method 1
The transmission of the torque is then ensured, in the case of these working cylinders of small diameters, by friction on the intermediate support cylinders which are themselves driven by a geared motor assembly.
Data Source
Figure 1
Figure 2
AI summary
The present invention relates to a method and device for adjusting an offset (O) of a pair of working rolls (2, 2') relative to a pair of support rolls (3, 3') in rolling equipment, said offset (O) being defined in that a plane (P') containing the axes of rotation of said working rolls (2, 2') is offset relative to a plane (P) which is perpendicular to the traveling plane of a strip (1) to be rolled and through which the axes of said support rolls (3, 3') of said working rolls (2, 2') pass, characterized in that the device includes: a module (8) for identifying rolling parameters; a module (9) for determining, from said rolling parameters, at least one first offset value (O) enabling a reduction in the stresses parallel to a traveling plane of a strip (1) on the working rolls (2, 2'); an offset controller (10) for maintaining said offset at said first offset value throughout the duration of a rolling program, unless at least one other offset value has been predetermined.