Stripper Chisel Positioning in Aluminum Rolling Stands
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Solution Overview
Problem
In wide roll stands, the existing methods for positioning stripper chisels between work rolls fail to maintain a constant gap between the chisel and the roll as the roll diameters change, leading to potential damage and inefficiencies in rolling stock transfer, especially in aluminum stands where high loads and varying roll diameters pose challenges.
Innovation Solution
The stripper chisel is integrated into a horizontally displaceable stand roller table, linked with the vertical movement of the bottom work roll, allowing the chisel to adjust its position relative to the work roll and maintain a constant gap across different operating positions and diameters, using hydraulic adjustments to ensure optimal alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the stripper chisel is fastened between the work roll chocks, then the chisel position can be adjusted to different roll diameters using inserts, but the chisel remains in a fixed position relative to the work roll while moving with the bottom set of work rolls during hydraulic adjustment, causing changing distances between chisel and stand roller table
Solution Approach 1:
The stripper chisel is mounted on a horizontally displaceable stand roller table instead of being fixed between work roll chocks. The stand roller table can move horizontally to adjust the chisel position relative to the work roll during hydraulic adjustment, maintaining a constant gap between the chisel and the rolling stock while adapting to different roll diameters and positions.
Solution Approach 2:
The stand roller table acts as an intermediary between the fixed chisel mounting and the moving work roll. By making the stand roller table horizontally displaceable, it mediates the position changes of the work roll during hydraulic adjustment, ensuring the chisel maintains a constant working gap with the rolling stock.
2Strength
If the stripper chisel is integrated in the stand roller table, then the chisel can be constructed to be more rigid and robust to absorb high loads, but the position of the chisel changes in relation to the stand roller table when the bottom work roll moves vertically
Solution Approach 1:
The stand roller table is designed to be horizontally displaceable, allowing it to dynamically adjust its position to maintain a constant gap between the integrated stripper chisel and the work roll during vertical movement of the bottom work roll, while the chisel itself remains rigid to absorb high loads.
3Strength
If the stripper chisel is integrated in the stand roller table, then the design of the chisels is optional with respect to their section modulus to absorb high loads, but the position adjustment to maintain constant gap during hydraulic adjustment becomes more complex
Solution Approach 1:
The horizontally displaceable stand roller table serves multiple functions: it supports the integrated stripper chisel, provides horizontal displacement to maintain constant gap during hydraulic adjustment, and accommodates different roll diameters. This multi-functionality reduces the need for separate adjustment mechanisms.
Data Source
AI summary
A device for adjusting the distance of stripper chisels from a circumference of work rolls supported in chocks of a roll stand, wherein the stripper chisels are movable parallel to the rolling line in direction towards and away from the roll gap. To adapt to different operating positions and diameters of the work rolls, the stripper chisels are arranged in a horizontally displaceable stand roller table. The movement of the stand roller table is linked with the vertical movement of the bottom work roll so that the stripper chisel can be moved away from the work roll when the bottom work roll moves upward, and vice versa.