Rolling Mill Side Support Roller Clearance Adjustment
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Solution Overview
Problem
In laterally supported sexto rolling mills with cassette technology, mechanical interferences occur between the metal strip and the side support roller assembly, and between the side support roller and the intermediate roll, due to diameter changes of the working and intermediate rolls during wear and planing, leading to inadequate cooling and lubrication of the rolls.
Innovation Solution
A readjustment method and device that adjust the interspace dimensions between the side support roller and the support roll, and between the strip and the bearing support, by modifying the position of the bearing support on an articulation axis, using a groove/key positive-location system or an eccentric, to maintain optimal clearance and ensure continuous cooling and lubrication of the rolls throughout the rolling process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the working rolls and support rolls are used without adjustment during wear and planing, then the rolling operation continues, but mechanical interferences occur between the side support roller and the support roll, and between the side support roller assembly and the metal strip
Solution Approach 1:
The bearing support is made adjustable along the arm to dynamically adapt the interspace dimensions between the side support roller and support roll, and between the bearing support assembly and metal strip, as roll diameters change during wear and planing operations
Solution Approach 2:
The position of the bearing support on the arm is modified to change the interspace dimensions, allowing the system to accommodate varying roll diameters and prevent mechanical interferences throughout the rolling process
2Ease of manufacture
If the interspace dimensions are not adjusted for roll diameter changes, then the structure remains simple, but optimal cooling and lubrication of the rolls cannot be maintained
Solution Approach 1:
The bearing support position on the arm is made adjustable to maintain optimal interspace dimensions for cooling and lubrication as roll diameters change during operation
Solution Approach 2:
The adjustable bearing support mechanism serves multiple functions: preventing mechanical interferences and maintaining optimal cooling/lubrication clearances throughout the rolling process
3Device complexity
If the bearing support position is fixed on the arm, then the device complexity is reduced, but mechanical interferences occur between the side support roller and the support roll during wear and planing
Solution Approach 1:
The bearing support is made adjustable along the arm to dynamically adapt the interspace dimensions between the side support roller and support roll, as roll diameters change during wear and planing operations
Solution Approach 2:
The position of the bearing support on the arm is modified to change the interspace dimensions, allowing the system to accommodate varying roll diameters and prevent mechanical interferences throughout the rolling process
Data Source
AI summary
Disclosed is a rolling method for rolling a strip including: rolling the strip by a pair of working rolls; transmitting a rolling force to the working rolls by a pair of support rolls; holding each of the working rolls by a pair of side support rollers; supporting each side support roller by two rows formed by rollers; supporting each row formed by the rollers, by a bearing support carrying rollers, the bearing support mounted pivotally on an articulation axis. The dimensions of a first interspace between the side support roller and the support roll and a second interspace between the strip and the assembly consisting of side support roller and bearing support vary in the course of the rolling. The method includes adjusting the dimension separating the axis of the support roll and the axis of the side support roller defining the first interspace.