Hot-Rolling Mill Roll Cooling with Spacer-Controlled Scraper Wear
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Solution Overview
Problem
Existing cooling devices for hot-rolling mills experience excessive and uneven wear, leading to spilling of cooling fluid on the metal strip, resulting in defects and increased downtime due to frequent scraper replacements.
Innovation Solution
A cooling device with a shovel-shaped body featuring spacers that contact the work roll surface to maintain a predefined distance and force, combined with a mechanical scraper and additional pressure means to ensure even wear and controlled fluid distribution, preventing fluid spillage and extending service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a scraper is used to prevent cooling fluid spillage, then cooling control is improved, but scraper wear increases leading to frequent replacements
Solution Approach 1:
The invention changes the geometric parameters of the shovel-shaped body, specifically the curvature radius of the curved portion and the positioning of openings, to optimize both cooling fluid distribution and scraper wear characteristics. By adjusting these parameters, the system achieves reliable cooling control while minimizing excessive wear.
Solution Approach 2:
The shovel-shaped body is designed to follow the contour of the work roll, creating a dynamic adaptation to roll surface variations. This dynamic configuration ensures consistent cooling control while distributing wear more evenly across the scraper surface, extending service life.
2Reliability
If scraper pressure is increased to prevent fluid spillage, then cooling control improves, but wear on the scraper increases
Solution Approach 1:
The openings in the shovel-shaped body are strategically positioned to create localized cooling zones. This local quality approach allows effective cooling control in specific areas without requiring excessive overall pressure, thereby reducing scraper wear while maintaining reliable cooling where most needed.
3Reliability
If the scraper is positioned closer to the work roll surface, then cooling control is improved, but wear becomes uneven and excessive
Solution Approach 1:
The curved portion of the shovel-shaped body is designed with a specific curvature radius that matches the work roll contour. This curvature ensures uniform contact pressure distribution across the scraper, preventing uneven wear while maintaining stable positioning for reliable cooling control.
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 provides a more stable and predictable wear pattern, reducing downtime and production losses by maintaining a consistent cooling fluid cushion and minimizing unnecessary wear on the scraper and spacers, ensuring efficient and controlled cooling.
Implementation Method 1
a cooling device for a hot-rolling mill for a metal strip (10), the hot-rolling mill having at least one pair of work rolls (2) each having a work roll surface (2'), the cooling device comprising a shovel-shaped body (3) further comprising one or more spacers (8) arranged to contact the work roll surface (2')
Data Source
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AI summary
Cooling device (1) for a hot-rolling mill for a metal strip (10), having at least one pair of work rolls (2) each having a work roll surface (2') comprising a shovel-shaped body (3) comprising a plurality of openings arranged to project a cooling fluid on a work roll (2), and a scraper (5) arranged to prevent the cooling fluid from spilling on the metal strip (10), and a pressure means (9) for pressing the scraper (5) against said work roll surface (2'), wherein the shovel-shaped body (3) further comprising one or more spacers (8) arranged to contact the work roll surface (2') with a predefined force.