Pressing Roll Slab Warpage Detection for Early Continuous Casting Control
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Solution Overview
Problem
In continuous casting equipment, existing methods fail to accurately and stably measure slab warpage due to environmental conditions, leading to late detection and potential operation stops, especially in vertical-type systems where significant warpage causes slabs to ride on conveying rolls, disrupting the process.
Innovation Solution
A slab warpage detection apparatus comprising a pair of pressing rolls that move in the thickness direction of the slab, supported by a movement unit and equipped with a position detecting unit, allowing for early warpage sensing and measurement by tracking the rolls' positions, and enabling adjustment of pressing forces to straighten the slab before operation halts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a laser displacement meter is used to measure slab displacement, then measurement precision is improved, but reliability deteriorates due to early stage deterioration from heat and vapor in the continuous casting environment
Solution Approach 1:
The patent replaces the optical laser displacement meter with a mechanical measurement system consisting of a scale and a pointer attached to the pressing roll. This mechanical system is resistant to the harsh continuous casting environment (heat and vapor) that causes laser meters to deteriorate early, thereby improving reliability while maintaining measurement capability.
2Device complexity
If warpage detection is performed using conventional methods, then device complexity is reduced, but detection timing is delayed until warpage becomes significant
Solution Approach 1:
The patent performs warpage detection at the exit side of the roll segment, which is the earliest possible location where warpage can be detected. By placing the pressing roll and measurement system at this upstream position, the system detects warpage in its initial stages before it develops into significant deformation that would cause operational problems, thus reducing loss of time.
3Device complexity
If pressing rolls are made fixed, then device complexity is reduced, but warpage detection capability is lost
Solution Approach 1:
The patent makes the pressing roll movable in the thickness direction of the slab rather than fixed. This dynamic configuration allows the pressing roll to follow the slab's surface profile, enabling the measurement system to detect warpage amounts by measuring the position changes of the pressing roll. The movement capability is essential for accurate warpage detection while the overall system remains relatively simple.
Data Source
AI summary
Provided is a slab warpage detection apparatus detecting warpage of a slab drawn from a mold in continuous casting equipment. The slab warpage detection apparatus includes a pair of pressing roils that pinches the slab on a rear side of a roll segment, supporting the slab drawn from the mold, in a slab drawing direction, a movement unit that supports the pair of pressing rolls to be movable in a thickness direction of the slab, and a position detecting unit that detects positions of the pressing rolls in the thickness direction of the slab.