Rolling Stand Coupling Member for Metal Products
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Solution Overview
Problem
Existing rolling stands for metal products are complex, require a large number of components, and involve high-pressure operations that can lead to oil leakages and safety risks during the installation and replacement of rolling rolls or rings, complicating maintenance and alignment processes.
Innovation Solution
A rolling stand design featuring a tubular body with a deformable chamber and a piston-type deformer element that allows for selective mechanical interference between the rolling roll and the rotation shaft, reducing the number of components and simplifying the installation and removal processes by using lower working pressures and a fluid-dynamic circuit to facilitate deformation and coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rolling stands use multiple support shafts with clamping pins and high-pressure oil feed circuits to secure rolling rolls, then reliable mechanical keying is achieved, but device complexity increases and safety risks arise from high-pressure operations
Solution Approach 1:
The coupling member is divided into distinct functional segments: a tubular body for structural support, a chamber for fluid containment, and a deformer element for active engagement. This segmentation allows each component to perform its specific function efficiently while reducing the overall complexity of the system by eliminating unnecessary intermediate parts.
Solution Approach 2:
The invention extracts the essential function of mechanical keying from the complex assembly of clamping pins, thrust elements, and abutment elements, and consolidates it into a single coupling member with a deformer element. This extraction removes harmful complexity while preserving the reliable mechanical connection between the rolling roll and support shaft.
2Strength
If high-pressure oil (3600 bar) is used to dilate rolling rolls and support shafts for clamping, then secure mechanical interference is obtained, but safety risks increase due to potential oil leakages and apparatus damage
Solution Approach 1:
The invention changes the pressure parameter from extreme high pressure (3600 bar) to a more moderate pressure range that is sufficient to activate the deformer element and create the necessary mechanical interference. This parameter change maintains the required clamping strength while significantly reducing the safety risks associated with extreme pressure operations.
Solution Approach 2:
The invention converts the potential harm of high-pressure oil systems into a benefit by using a fluid-dynamic circuit at lower pressures to activate the deformer element. The hydraulic principle is applied at a safe pressure level, transforming the previously harmful high-pressure system into a safe and effective low-pressure activation mechanism.
3Ease of operation
If multiple support elements are removed during installation and replacement operations, then access to rotation shafts is improved, but alignment precision decreases due to increased mechanical plays and errors
Solution Approach 1:
The coupling member is designed with pre-positioned support elements that remain in place during installation and replacement operations. These support elements provide preliminary alignment guidance for the rolling roll, ensuring precise positioning before the final clamping action occurs, thus maintaining alignment precision while facilitating ease of operation.
4Productivity
If direct axial removal of components is provided, then removal speed is increased, but component damage occurs due to sliding and mechanical interference
Solution Approach 1:
The invention employs a dynamic removal process where the deformer element is first deactivated to release the mechanical interference, allowing the rolling roll to be removed axially without resistance. This dynamic approach maintains component integrity by eliminating sliding friction and mechanical interference during removal, while still achieving high removal speed through the simplified axial extraction path.
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
The solution simplifies the installation and removal of rolling rolls, reduces component wear, and lowers operational pressures, thereby enhancing safety and reducing maintenance complexity while maintaining effective mechanical keying of the rolling rolls with the rotation shaft.
Implementation Method 1
oil at extremely high pressure, for example 3600 bar, is inserted through the feed circuit, to dilate the rolling roll or ring and the head of the support shaft
Implementation Method 2
at least one chamber in which at least one deformer element is inserted mobile and is able to be selectively driven to deform the chamber and the tubular body
Data Source
AI summary
Rolling stand for oblong metal products comprising a plurality of rolling rolls (11) each installed on a respective rotation shaft (12). Between at least one rotation shaft (12) and the respective rolling roll (11), a coupling member (15) is provided and is configured to couple the rolling roll (11) and the rotation shaft (12) to each other. The coupling member (15) comprises a tubular body (16) interposed between the rolling roll (11) and the rotation shaft (12) and provided with a chamber (17) in which a deformer element (18) is inserted mobile.