Cooling Section Control for Heavy Plate Flatness
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Solution Overview
Problem
Existing methods for cooling heavy plate in rolling mills often result in imperfections due to thermal stresses, as they focus on equalizing heat transfer coefficients rather than accounting for temperature differences between the top and bottom surfaces, leading to uneven heat dissipation and potential warping of the sheet.
Innovation Solution
A method where coolant delivery for both the upper and lower sides of the heavy plate is determined based on the specific heat flows and temperatures, ensuring that the heat flow is balanced to maintain flatness, with a control and/or regulating device adjusting coolant output to achieve a predetermined target state, including a limit temperature to prevent uncontrollable cooling mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cooling rate is increased to improve throughput, then productivity is improved, but flatness deteriorates due to thermal stresses and warping
Solution Approach 1:
The system dynamically adjusts coolant output parameters based on real-time temperature measurements and heat flow calculations. This enables optimized cooling rates that maintain flatness by preventing thermal stress-induced warping, while still achieving high throughput through efficient heat dissipation control.
Solution Approach 2:
The patent implements a feedback control system where surface temperatures are measured, heat flow rates are calculated, and coolant output is adjusted accordingly. This closed-loop control ensures flatness is maintained during high-rate cooling, enabling improved throughput without sacrificing manufacturing precision.
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
This approach enhances the flatness of the heavy plate by ensuring equal heat dissipation from both sides, allowing for correction of imperfections and maintaining product quality, while also improving throughput by preventing warping and ensuring the sheet metal exits the cooling section in a controlled, flat state.
Implementation Method 1
a plurality of coolant dispensing devices for cooling a top surface of the sheet and a plurality of coolant dispensing devices for cooling a bottom surface of the sheet
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a cooling section, to a control device for a cooling section, to a machine-readable program code, to a storage medium and to a method for cooling sheet metal by means of a cooling section. The cooling section has a plurality of coolant dispensing devices for cooling an upper sheet metal face and a plurality of coolant dispensing devices for cooling a lower sheet metal face. By means of the cooling, a predefined target state of the sheet metal is achieved at a reference point at and/or after the exit from the cooling section, wherein coolant dispensing for a first and a second coolant dispensing device is determined, wherein the first and the second coolant dispensing devices are arranged opposite the sheet metal. Because the coolant dispensing for the first and second coolant dispensing devices (2) is determined on the basis of a predefined flow of heat to be dissipated from the sheet metal side (O, U) that faces the respective coolant dispensing device (2), wherein a temperature, in particular surface temperature (To, Tu), of the respective sheet metal side (O, U) is taken into account for the respective flow of heat to be dissipated, the flatness of plate that is produced can be increased further with a simultaneously high throughput of the plate rolling train.