Method for online rapid arc alignment of arc-shaped square billet continuous casting machine crystallizer and movable section

Abstract

The invention discloses a method for online rapid arc alignment of an arc-shaped square billet continuous casting machine crystallizer and a movable section. The method includes the steps that a strip type gradienter is adjusted, so that measuring datum planes at the lower portion of an arc alignment sample board are perpendicular to the horizontal plane when a water bubble is in the middle position; clamping pins of the arc alignment sample board are clamped on a second foot roll on the inner arc or the outer arc of the crystallizer, the first measuring datum plane is tangential to the corresponding foot roll, the second measuring datum plane is tangential to a roll on the inner arc or the outer arc of a #-shaped roll carrier of the movable section 1, the numerical value of the gradienter is read, and if the numerical value is larger than or equal to 0.2 mm, the crystallizer is adjusted on line till the read numerical value of the gradienter is smaller than 0.2 mm; and the clamping pins of the arc alignment sample board are clamped on the second foot roll of a left side roll or a right side roll of the crystallizer, the first measuring datum plane is tangential to the corresponding foot roll, the second measuring datum plane is tangential to the left side roll or the right side roll of the #-shaped roll carrier of the movable section 1, the numerical value of the gradienter is read, and if the numerical value is larger than or equal to 0.2 mm, the crystallizer is adjusted on line till the read numerical value of the gradienter is smaller than 0.2 mm. The method has the beneficial effects that comprehensive arc alignment accuracy is smaller than or equal to 0.2 mm and arc alignment is performed rapidly and conveniently.

Description

technical field [0001] The invention belongs to the technical field of metallurgical rolling, and in particular relates to an online fast arc alignment method for a mold and a movable section of an arc-shaped billet continuous casting machine with high arc alignment accuracy and quick and convenient arc alignment. Background technique [0002] For continuous casting machines, especially the arc accuracy of the entire quarter arc of the arc-shaped billet continuous casting machine has a great influence on the shape and quality of the billet. If the error is too large, it will affect the The additional deformation of the billet shell causes problems such as central cracks, transverse cracks, longitudinal cracks, and central looseness. At the same time, inaccurate arc alignment is also one of the important reasons for steel breakout, so the arc accuracy must be strictly controlled. Especially in the current continuous casting and rolling, the process of "one pot to the bottom"...

AI Technical Summary

Problems solved by technology

Use the profiling model and the jack to adjust the crystallizer, because the narrow and dark space of the online arc alignment not only causes inaccurate measurement, but also the jack adjustment accuracy is low and the speed is slow, which affects the arc alignment accuracy and speed. The comprehensive arc alignment accuracy can only reach ≤ 0.5mm; improve the support structure of the crystallizer to measure and adjust with the profiling template. Although the measurement and adjustment space is enlarged, it is easier to measure and adjust, and the adjustment accuracy is improved, but the support structure of the crystallizer is more complicated and needs to be hoisted The entire crystallizer and the movable section not only have high initial costs, but also complicated maintenance in the later period, and the hoisting will cause the need to re-align the arc with the fixed section, which increases the workload

The positioning accuracy of the positioning pin is low, the adjustment range is small, it is difficult to measure, and it is often affected by factors such as equipment deterioration, impact, foundation subsidence, corrosion, etc.; the cost of automatic centering of sensors and hydraulic cylinders is high, the space is crowded, and the equipment density is high , high control precision, difficult maintenance and overhaul, the mold itself and the movable section have a very narrow matching area, and the man-machine environment is very poor. The equipment works in harsh environments such as high temperature, high humidity, alternating cold and hot, and high operating rate, and the failure rate is also high.

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