Continuous Casting Crater End Detection by Segment Frame Bending
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Solution Overview
Problem
Existing methods for determining the crater end location in continuous casting are inaccurate and require frequent maintenance, making them impractical for continuous operation.
Innovation Solution
Measure the bending of the nearest upper segment frame in a continuous casting machine to estimate the crater end location, using strain gauges or extensometers, and calculate the exact position based on measured bending values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If load sensors are installed on roll bearings to detect crater end location, then the crater end can be detected, but the device requires frequent maintenance and installation only during roll changes
Solution Approach 1:
The patent introduces an intermediary element - a separate measurement device attached to the roll support structure (chock or bearing housing) rather than directly to the roll or bearing. This intermediary structure allows sensor installation and replacement without removing the roll itself, solving the maintenance difficulty while preserving detection capability
Solution Approach 2:
The measurement system is segmented into independent components: the sensor module can be independently installed, removed, and replaced on the roll support structure without affecting the roll assembly. This segmentation enables easy maintenance while maintaining detection function
2Device complexity
If displacement sensors are used to measure segment displacement for detecting crater end, then the detection method is simple, but the measurement accuracy is insufficient due to small displacement values
Solution Approach 1:
The patent changes the measurement parameter from direct small displacement (0.1mm) to bending moment or strain, which provides larger and more detectable signal variations. By measuring the bending of the segment frame or roll support structure instead of direct displacement, the system achieves higher precision while maintaining relatively simple device complexity
3Measurement precision
If strain gauges are installed on roll chocks to detect crater end, then detection can be performed, but the installation requires stopping the installation and removing full segments
Solution Approach 1:
The patent uses the roll support structure (chock or bearing housing) as an intermediary carrier for the sensors. This allows the measurement system to be installed and maintained independently from the roll assembly, eliminating the need to stop casting and remove full segments for sensor replacement
Solution Approach 2:
The measurement system is designed to be dynamically installable and removable from the roll support structure during operation. The sensor module can be quickly attached or detached without requiring complete disassembly of the casting line, maintaining productivity while enabling precise measurement
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
Accurately detects the crater end without requiring frequent maintenance, enhancing productivity by optimizing casting speed and enabling dynamic soft reduction.
Implementation Method 1
said measurement being performed at least on the two ends of said nearest upper segment frame
Data Source
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AI summary
A method to determine the crater end location of a cast metal product during its casting, said crater end location being the location at which the cast metal product becomes fully solidified. The invention is also related to a continuous casting method and to a continuous casting machine.