Rolling Mill Layout for Single-Side Cage Extraction
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Solution Overview
Problem
Multi-cage rolling mills face challenges in efficiently extracting all cages from the same side while maintaining a simplified roll control system that does not require special angular gearboxes, leading to complex and costly control systems and maintenance issues due to water infiltration.
Innovation Solution
A rolling mill design with synchronized mechanical roll adjustment and a control system using single gear motor groups connected via single extensions, allowing lateral extraction of all cages from the same side without special angular gearboxes, and positioning gearboxes above the rolling stations to prevent water infiltration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multi-cage rolling mills use traditional control systems with angular gearboxes to enable lateral extraction of cages, then cage extraction capability is improved, but device complexity and manufacturing cost increase due to special angular gearboxes
Solution Approach 1:
The patent extracts the gearbox from the traditional angular position and repositions it to align with the rolling axis, eliminating the need for special angular gearboxes while maintaining cage extraction capability. This is achieved by positioning the gearbox on the same side as the rolling axis, allowing direct connection to the roll through a simplified extension mechanism.
Solution Approach 2:
Instead of using angular gearboxes to transmit motion at angles, the patent inverts the approach by aligning the gearbox with the rolling axis and using a single extension to connect to the roll. This reversal of the traditional angular transmission approach simplifies the control system while maintaining functionality.
2Ease of operation
If angular gearboxes are positioned below rolling stations for cage extraction, then lateral extraction is enabled, but reliability deteriorates due to water infiltration and corrosion
Solution Approach 1:
The patent extracts the gearbox from the vulnerable position below the rolling station and relocates it to a protected position aligned with the rolling axis. This repositioning removes the gearbox from the water drainage path, eliminating the corrosion problem while preserving lateral extraction capability through the simplified extension mechanism.
Solution Approach 2:
The patent introduces a single extension as an intermediary element between the gearbox and the roll. This extension serves as a mechanical link that allows the gearbox to be positioned in a protected location while still transmitting motion to the roll, acting as a mediator that resolves the conflict between protection and functionality.
3Manufacturing precision
If traditional roll adjustment systems with multiple actuators are used for each roll, then rolling action control is improved, but device complexity increases
Solution Approach 1:
The patent merges the adjustment control for all three rolls into a single actuator system. By positioning the gearbox aligned with the rolling axis and using a single extension to control roll position, the system combines multiple adjustment functions into one unified control mechanism, reducing complexity while maintaining rolling action control precision.
Solution Approach 2:
The single extension mechanism serves multiple functions: it transmits motion from the gearbox to the roll, enables roll position adjustment, and facilitates cage extraction. This multi-functional design eliminates the need for separate actuators for each roll, reducing system complexity while maintaining control capabilities.
Data Source
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AI summary
The invention relates to a rolling mill for solid elongated products, defining a rolling axis X, comprising a first plurality of rolling stations (100) and a second plurality of rolling stations. Each station comprises: a load-bearing structure (110); a roll-holder cartridge (120) removable along an extraction direction (Y) with three rolling rolls movable radially and rotating around three respective axes of rotation placed at 120° from each other, a roll having its own axis of rotation in vertical; a system for the synchronized mechanical adjustment of all three rolls mounted on the cartridge (120); a device (141) for operating the synchronized mechanical adjustment system, which is suitable to engage the synchronized mechanical adjustment system by engagement along a coupling direction (Z); three gear motor groups connected to the rolls by means of single extensions (171, 172, 173). The position of the rolls of the second plurality of stations is rotated by 60° around the rolling axis with respect to the position of the rolls of the first plurality of stations in such a way that the rolls with vertical axis of the first plurality of stations are arranged on a first side (1a) of the rolling mill and the rolls with vertical axis of the second plurality of stations are arranged on a second side (1b) of the rolling mill, opposite the first with respect to the rolling axis. All the rolling stations are configured to allow the lateral extraction of the respective roll-holder cartridges (120) from the same side of the rolling mill, corresponding to either the first (1a) or the second side (1b). All the rolling stations (100) have their respective actuation devices: either fixedly mounted on the load-bearing structure (110) if they are positioned on the side of the rolling mill opposite to the cartridge extraction side and have their respective coupling direction (Z) parallel to the extraction direction (Y), or mounted in a movable manner on the load-bearing structure (110) of the roll-holder cartridge if these devices are positioned in such a way as to have the respective coupling direction (Z) incident to the extraction direction (Y). The single extensions (171, 172, 173) of all the stations (100) are movable with respect to the load-bearing structures (110).