Rolling Stand Eccentric Bushing Force Measurement
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Solution Overview
Problem
Existing rolling stand systems face challenges in accurately measuring rolling force and adjusting rollers during the rolling process due to issues with hydraulic cylinders, including complex operations, high costs, and lack of inherent fail-safe functions, which affect the accuracy and reliability of the rolling process.
Innovation Solution
A method and system utilizing a low-friction bearing unit to support the eccentric bushing in a rolling stand, allowing the adjusting mechanism to measure the rolling force by rotating the eccentric bushing to a desired position and determining the force from the measured adjusting force, enabling accurate force measurement and adjustment during the rolling process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hydraulic cylinders are used to adjust rollers in a rolling stand, then the rolling force can be determined by measuring hydraulic pressure, but the system becomes operationally complex, expensive, and lacks inherent fail-safe functions
Solution Approach 1:
The patent extracts the measurement function from the hydraulic adjustment system and relocates it to the eccentric bushing support structure. The rolling force measurement is now obtained through the adjusting mechanism's force measurement on the eccentric bushing, rather than through hydraulic pressure measurement in cylinders. This separation eliminates the need for complex hydraulic pressure sensing while maintaining measurement capability.
Solution Approach 2:
The eccentric bushing support structure with low-friction bearings inherently provides the measurement function through its own adjusting mechanism. The system uses the existing structural components (eccentric bushing, adjusting mechanism, low-friction bearings) to simultaneously perform both the adjustment function and the measurement function, eliminating the need for separate hydraulic measurement systems.
2Ease of manufacture
If friction bearings are used to support the eccentric bushing, then the structure is simple, but the rolling force measurement becomes inaccurate due to high friction forces during adjustment
Solution Approach 1:
The patent applies the principle of using a fluid film (lubrication) to replace solid friction. The low-friction bearing unit uses a lubricant film between the eccentric bushing and housing to minimize friction forces, enabling accurate measurement of rolling force while maintaining the simplicity of the eccentric bushing support structure.
Solution Approach 2:
The patent changes the friction parameter of the bearing support from high friction (friction bearing) to low friction (low-friction bearing unit with lubrication). This parameter change enables the adjusting mechanism to accurately measure rolling force without being significantly affected by friction forces during adjustment operations.
3Adaptability or versatility
If rollers are adjusted during the rolling process, then continuous adaptation to material changes is possible, but friction forces prevent accurate force measurement
Solution Approach 1:
The low-friction bearing unit with lubrication enables continuous adjustment during the rolling process by minimizing friction forces that would otherwise prevent accurate measurement. The lubricated bearing allows the eccentric bushing to rotate smoothly while the adjusting mechanism accurately measures the rolling force applied to the rollers.
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 allows for precise measurement and control of the rolling force, improving the accuracy of the rolling process, reducing operational complexity and costs, and providing a fail-safe function by decoupling the restoring torque from friction, enabling continuous measurement and improved material deformation modeling.
Implementation Method 1
rotatably supporting the eccentric bushing in the housing by a low-friction bearing unit
Data Source
AI summary
A rolling stand includes at least one roller having a roller journal which is rotatably supported by an eccentric bushing which in turn is rotatably supported by a low-friction bearing unit. An adjusting mechanism exerts an adjusting force on the eccentric bushing for rotating the eccentric bushing with respect to the housing and maintaining the eccentric bushing in a desired position. In order to determine a rolling force in the rolling stand, the eccentric bushing is rotated to a desired position relative to the housing by the adjusting mechanism, and an effective adjusting force in the adjusting mechanism is measured when the eccentric bushing is held in the desired position. The rolling force can then be ascertained on the basis of the measured adjusting force.