Rolling Mill Radial Roll Positioning via Extraction
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Solution Overview
Problem
Existing three-roll rolling mills with oscillating arms face challenges in maintaining roll position and structural rigidity, leading to laborious maintenance and potential geometric issues due to weight and dirt accumulation, requiring frequent disassembly and adjustment.
Innovation Solution
A rolling mill design with radially sliding yoke supports and hydraulic capsules for precise roll positioning and balancing, allowing easy extraction and reinsertion of rolls within structurally reinforced containers, eliminating the need for oscillating arms and maintaining roll alignment without geometric adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If rolls are mounted on oscillating arms, then roll position can be adjusted, but the structure becomes complex and maintenance becomes laborious
Solution Approach 1:
The patent extracts the oscillating arm mechanism and replaces it with a fixed container structure. The rolls are mounted directly on supports within the container, eliminating the complex oscillating arm assembly while maintaining roll position adjustability through simpler radial movement mechanisms.
Solution Approach 2:
The rolling mill is segmented into a fixed container structure with independent roll supports. Each roll can be adjusted and maintained separately within the container, simplifying the overall structure while enabling individual roll position control without requiring complex oscillating mechanisms.
2Ease of operation
If oscillating arms are used for roll mounting, then roll positioning is possible, but weight and dirt accumulation cause practical drawbacks
Solution Approach 1:
The oscillating arm mechanism is completely extracted from the design. The new fixed container structure with radial adjustment eliminates the pivot points and moving joints that accumulate dirt, while the reduced moving mass eliminates weight-related operational issues.
Solution Approach 2:
The fixed container structure with radial adjustment mechanisms allows for self-contained roll positioning without requiring external oscillating arms. The system achieves positioning through intrinsic radial movement capabilities built into the container structure, eliminating the need for complex external mechanisms that are susceptible to dirt and weight issues.
3Ease of repair
If arms are extracted from container for maintenance, then roll maintenance is possible, but structural rigidity is compromised
Solution Approach 1:
The container is designed as a segmented structure with independent roll supports that can be accessed individually. Each roll support can be removed or adjusted without compromising the overall container structure, maintaining rigidity while enabling easy maintenance access.
Solution Approach 2:
The container structure has local openings or access points specifically designed for roll maintenance, while the main body remains rigid and closed. This allows maintenance personnel to access rolls for maintenance without requiring complete arm extraction, preserving structural integrity while providing necessary access.
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
Facilitates simple and effective regulation of roll position and diameter variation, ensuring easy maintenance and structural integrity, reducing labor and geometric complications associated with oscillating arm systems.
Implementation Method 1
hydraulic capsules for precise roll positioning and balancing
Implementation Method 2
radially sliding yoke supports
Data Source
AI summary
The invention relates to a rolling mill for tubes, in which a series of roll-holder containers (10) is housed in an external structure (2) extended along a rolling axis (L); the containers can slide inside the structure to be extracted therefrom and each one houses at least three rolls (17, 18, 19) controlled by respective driving motors (41, 42, 43). In accordance with the intervention the rolls (17, 18, 19) can be moved inside the containers (10) in a guided way along directions radial in relation to the rolling axis, in order to regulate the distance therefrom.