Rolling Mill Roll Pass Measurement Reference Placement
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Solution Overview
Problem
Existing rolling mills face challenges in achieving precise roll pass information due to distortions caused by rolling forces, leading to measurement errors and maintenance issues.
Innovation Solution
The placement of pass and spatial references peripheral to the force flow, outside of force introduction regions, and on the roll stand's neutral regions, minimizes the influence of rolling forces, allowing for precise roll pass determination using a measurement gauge and calibration system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pass reference and spatial reference are disposed in the positioning cylinder to determine roll pass, then the determination device can measure roll position, but measurement results are distorted by rolling forces causing measurement errors
Solution Approach 1:
The patent extracts the reference elements (pass reference and spatial reference) from the force-affected positioning cylinder and relocates them to regions peripheral to the force flow. The pass reference is disposed on the roll or roll bearing outside the force introduction region, while the spatial reference is disposed on the roll stand outside the force introduction region. This separation removes the measurement references from the harmful force field, eliminating rolling force distortions while preserving measurement capability.
2Device complexity
If spatial reference is disposed in the force introduction region, then the determination device can be compact, but maintenance problems arise due to difficult accessibility and high stress influences
Solution Approach 1:
The spatial reference is extracted from the force introduction region and relocated to the roll stand outside this region. This relocation improves maintenance accessibility by placing the reference element in a less constrained area, while also reducing stress influences on the reference. The determination device maintains its functional integrity through this spatial reconfiguration.
Solution Approach 2:
The patent introduces a neutral region on the roll stand as an intermediary location for the spatial reference. This neutral region serves as a mediator between the force introduction region and the external environment, providing a stable, accessible location that is neither directly in the high-stress zone nor completely isolated from the system.
3Measurement precision
If references are disposed peripheral to the force flow, then measurement precision is maximized, but the device structure becomes more complex
Solution Approach 1:
The patent uses the existing structural elements of the rolling mill (roll, roll bearing, roll stand) as carriers for the reference elements, rather than introducing completely separate measurement systems. The pass reference utilizes the roll or bearing structure, while the spatial reference utilizes the roll stand structure. This approach achieves precise measurement reference placement without adding significant structural complexity.
Data Source
AI summary
A rolling mill, in particular a rolling mill having more than one mill stand, includes at least two rolls which are mounted in a roll bearing in a mill stand to absorb rolling forces, movers for moving at least one roll relative to the mill stand as well as determining devices for determining the roll pass, the determining device having a pass reference and a spatial reference as well as a measuring device for measuring the relative position between the pass reference and the spatial reference. At least one of the pass reference and the spatial reference is arranged peripherally in relation to the power flow occurring between the roll and the mill stand.