Direct arc type continuous casting machine model curve with full-process continuous bending and continuous straightening functions

Abstract

The invention discloses a model curve of a straight arc type continuous casting machine with continuous bending and straightening in the whole process. The model curve includes a vertical section, a bending section, a straightening section and a horizontal section. The curve is smoothly connected; the rate of change of the curvature of the curve of the curved section satisfies the law of sinusoidal variation, and the curvature of the curve of the straightened section satisfies the fifth order odd polynomial law; at the connection point between the curved section and the straightened section, the bending The curvature of the segment is equal to the curvature of the straightening segment, the curve of the bending segment and the curve of the straightening segment have the same common tangent at the connection point, and the bending segment and the straightening segment are directly and smoothly connected. The invention undergoes continuous bending first and then directly performs continuous straightening, cancels the basic arc section, prolongs the arc length of the bending section and straightening section, reduces the strain rate of the continuous casting slab in bending and straightening deformation, and reduces the occurrence of cracks possibility.

Description

technical field [0001] The invention belongs to the field of continuous steel casting, and in particular relates to a model curve of a straight-arc continuous casting machine with continuous bending and straightening in the whole process. Background technique [0002] Bending and straightening technology of continuous casting slab is a key technology in continuous casting of iron and steel. Bending straightening of straight arc continuous casting machine refers to the process that the continuous casting slab bends from vertical under the action of external torque, and then the continuous casting slab with a certain radius of curvature becomes horizontal through the straightening torque. With the development of today's high-efficiency continuous casting technology, the curve of the continuous casting billet model has gradually developed from single-point bending and single-point straightening to multi-point bending and multi-point straightening, progressive bending and progre...

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a straight-arc continuous casting machine model curve with continuous bending and straightening throughout the whole process. The technical problem to be solved is: to straighten the continuous casting slab directly after bending and deformation without the existence of basic arc segments. In view of the high ambient temperature of the continuous casting slab in the bending section, the curve of the bending section is designed separately from the curve of the straightening section, so that the rate of change of the curvature of the bending section is higher than that of the straightening section. The rate of change of the curvature of the curve satisfies the sine law relative to the arc length, and the curvature of the curve of the straightening section satisfies the fifth-order odd-order polynomial law relative to the arc length. production, improve the quality of continuous casting slab

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