Rolling Mill Layout for Same-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
1Device complexity
If a multi-cage rolling mill uses a simplified control system with single gear motor groups and single extensions, then device complexity and manufacturing costs are reduced, but the ability to extract all cages from the same side is compromised
Solution Approach 1:
The extension is made movable relative to the gear motor group, allowing it to be positioned in different locations. During normal operation, the extension is positioned to connect the gear motor group to the roll. During cage extraction, the extension can be moved out of the way to allow all cages to be extracted from the same side without interference from the control system components.
2Ease of operation
If special angular gearboxes are used to enable lateral extraction of all cages from the same side, then ease of operation for cage maintenance is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The invention removes the need for special angular gearboxes by extracting the problematic component from the system. Instead of using complex angular gearboxes to clear the extraction path, the solution uses a movable extension that can be temporarily repositioned to allow cage extraction, then returned to its operational position for rolling operations.
3Area of stationary object
If gearboxes are positioned below the rolling stations, then space utilization is improved, but reliability decreases due to water infiltration and corrosion
Solution Approach 1:
The gear motor groups are repositioned from a vertical arrangement (below the rolling stations) to a horizontal arrangement (at the ends of the rolling mill). This dimensional change moves the gearboxes out of the water drainage path while still providing adequate space for operation and maintenance, eliminating the corrosion problem caused by water infiltration.
Data Source
AI summary
A rolling mill for solid elongated products, defining a rolling axis, including first and second rolling stations. Each station includes a load-bearing structure, a removable roll-holder cartridge with three rolling rolls movable radially and rotating around spaced rotational axes, and a roll having a vertical rotational axis. A system synchronizes mechanical adjustment of the rolls. Three actuators mount on the load-bearing structure; three gear motor groups connect to the rolls by single extensions. The second station rolls are rotated 60° from the first stations. The rolls with a vertical axis of the first and second stations are arranged on opposite sides of the rolling axis. All rolling stations allow lateral extraction of roll-holder cartridges from the same side of the rolling mill. The stations on the extraction side have actuators movable relative to the load-bearing structure. The stations with vertical rolls arranged on the opposite side have fixed actuators.