Dynamic slight press fan-shaped section deformation on-line measuring and compensating method

Abstract

The invention relates to a dynamic slight press fan-shaped section deformation on-line measuring and compensating method, which belongs to the technical field of continuous casting control in the metallurgical industry. The invention has the technical scheme that the method comprises the following steps: in a casting machine working clearance and under the condition that the number of fixed fan-shaped section roll gaps is ensured to not change along with the outside, and different clamping forces are applied to a fan-shaped section frame to obtain the variable quantity of corresponding different sensor values; the variable quantity is regressed with different pressure values to obtain the numerical function of the pressure and the deformation; a dynamic slight press control system sends out compensated action target quantity of the displacement sensor through the function, and finally the actual accurate value of the roll gap is ensured. The invention has the beneficial effects that the deformation of the fan-shaped section is measured to finally obtain the relationship of the roll gap value, the displacement sensor quantity and the amount of compensation, displacement sensor compensation amount is added in the casting machine roll gap setting process to finally solve the problem of poor casting blank quality caused by the deviation of set roll gap value and actual roll gap value caused by the deformation of the fan-shaped section in the production process.

Description

technical field [0001] The invention relates to an on-line measurement and compensation method for the deformation of a segment under dynamic light reduction, and belongs to the technical field of continuous casting control in the metallurgical industry. Background technique [0002] The dynamic soft reduction technology is to compensate for the shrinkage of the slab by adopting a real-time special reduction amount at the end of the solidification of the slab. This technology can significantly improve the quality of the slab. The dynamic soft reduction technology adopts the method of controlling the reduction amount of the roll gap of the sector section, directly acts on the shrinkage of the cast slab at different positions along the casting direction, and feedbacks the composition of each sector section by controlling the displacement value of the roll gap of each sector section Shrinkage taper, adjust the shrinkage taper of each fan-shaped segment by adjusting the displace...

AI Technical Summary

Problems solved by technology

Background Art In the production process of casting machines, the thickness of shims is generally adjusted outside the line to maintain a fixed mechanical roll gap for steel casting. Since the mechanical roll gap will change due to the impact and thermal expansion of the casting slab during the steel casting process, As a result, the actual roll gap value in the production process deviates from the set value, and the quality stability of the slab is poor. Often, high-quality steel cannot be produced, which has become a bottleneck restricting the production of high-end steel.

Generally, in the production process of the casting machine with dynamic soft reduction function, the online adjustment displacement sensor is used to change the control mode of the roll gap. Also due to the influence of the reaction force and thermal expansion of the slab like the conventional casting machine, the fan section in the casting process After being stressed, elastic deformation will occur, which will cause the value of the sensor to drift, and the displacement sensor value of the sector often deviates from the actual roll gap value, making it difficult to guarantee the internal quality of the slab

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