Continuous Casting Rolling Mode Selection
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Solution Overview
Problem
The existing continuous casting and rolling methods lack a systematic approach for selecting between continuous and discontinuous rolling modes, leading to inefficiencies and quality issues in rolled steel sheets due to arbitrary mode selection, resulting in unnecessary defects and wastage.
Innovation Solution
A method for selecting mode switching between continuous and discontinuous rolling modes based on specific equations involving slab thickness, speed, temperature, mill stand numbers, and scale remover pressures, ensuring the slab is in an austenitic state for optimal rolling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a continuous rolling mode is used, then productivity is improved, but manufacturing precision deteriorates due to arbitrary mode selection
Solution Approach 1:
The patent applies parameter changes by using mathematical models that consider multiple parameters (slab temperature, thickness, casting speed, rolling speed, mill stand numbers) to determine the optimal rolling mode. The mode selection is based on calculated parameters rather than arbitrary choice, ensuring both high productivity and manufacturing precision through data-driven decision making.
2Manufacturing precision
If a discontinuous rolling mode is used, then manufacturing precision is improved, but productivity deteriorates
Solution Approach 1:
The patent resolves this contradiction by dynamically selecting between continuous and discontinuous modes based on calculated parameters. The mathematical model evaluates multiple process parameters and determines the optimal mode for each specific situation, maximizing productivity when continuous mode is suitable while ensuring manufacturing precision when discontinuous mode is required.
3Device complexity
If mode selection is made arbitrarily, then device complexity is reduced, but manufacturing precision deteriorates due to trial and error processes
Solution Approach 1:
The patent implements feedback by using mathematical models that continuously evaluate process parameters (slab temperature, thickness, casting speed, rolling speed) to determine the appropriate rolling mode. This feedback mechanism eliminates arbitrary selection and trial-and-error processes, ensuring high manufacturing precision through systematic, data-driven mode selection while maintaining manageable system complexity.
4Device complexity
If trial and error process is used for mode selection, then device complexity is reduced, but loss of substance increases due to unnecessary defect products
Solution Approach 1:
The patent applies preliminary action by calculating and determining the optimal rolling mode before the actual rolling process begins. The mathematical model evaluates all relevant parameters in advance and selects the appropriate mode, preventing the production of unnecessary defect products and reducing slab wastage before the trial-and-error process can occur.
Data Source
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AI summary
A continuous casting and rolling apparatus, according to an embodiment of the present invention, comprises: a continuous casting machine that produces a slab; a rolling mill that includes a roughing mill located on a side of the outlet of the continuous casting machine and a finishing mill located on a side of the outlet of the roughing mill and makes the slab subjected to rolling; a cutting machine located on a side of the inlet of the roughing mill and/or on a side of the inlet of the finishing mill; and a controller that is electrically connected with the cutting machine to control the driving of the cutting machine and determines whether to perform mode switching between a continuous rolling mode in which the slab is supplied as a continuous body from the continuous casting machine and the rolling mill and a discontinuous rolling mode in which the slab is cut by the cutting machine in order to select the continuous or discontinuous rolling mode, wherein a predetermined expression is satisfied in a case where the controller selects the continuous rolling mode.