Hot straightening machine

Abstract

The invention belongs to the field of steel rolling, and relates to a hot straightening machine. The hot straightening machine comprises a memorial archway, a pressing-down roll-bending device, a balancing device, a pressing-down AGC cylinder, an upper roll box, a lower roll box, an upper roll box clamping device, a lower roll box clamping deice, a shaft connecting bracket, a transmission device and a roll changing device; and a needle bearing, or a cylindrical roller bearing or a sliding bearing mechanism is adopted by a transmission side of a working roll system. According to the hot straightening machine, the situation that a straightening plate cannot meet the product quality requirements due to the too large roll diameter, or a straightening roller/a universal joint is prone to beingdamaged to affect production due to the too small roll diameter is broken through; and the current situations that the roll diameter of the hot straightening machine is too large, the straightening plate cannot meet the product quality requirements, or the roll diameter is too small, and the straightening roller/the universal joint is prone to being damaged are completely changed, under the condition of reliable and normal production and covering the specification range of the straightening plate, the straightness of plate straightening is obviously improved, the product quality is obviously improved, the straightening effect is more obvious for plates, especially for wide, thin and high-strength plates, and thus the potential and great benefit effect is brought.

Description

technical field [0001] The invention belongs to the field of steel rolling and relates to a hot straightening machine. Background technique [0002] At present, hot straightening machines widely used in the field of steel rolling, especially hot plate hot leveling machines, due to the large diameter of the straightening rolls, the flatness of the plate straightening cannot meet the product quality requirements, or because the straightening rolls The small diameter of the roll will cause the straightening roll and the universal joint to twist or break frequently, seriously affecting the production. [0003] a) For plate thermal straightening machines with a plate width of 3800mm and above, due to the constraints of various conditions such as widthwise stiffness, structure, thermal deformation, and lubrication, the diameter of the straightening rollers of thermal straightening machines under such conditions in the past is too large . [0004] For plate thermal straightening ...

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Problems solved by technology

[0007] The invention provides a new type of thermal straightening machine technology to solve the current problem that the roll diameter is too large, and the straightening of wide, thin and high-strength plates cannot meet the product quality requirements for plate straightness; at the same time, it also solves the problem of small roll diameters, For the straightening of slightly thicker high-strength plates, the current problems of straightening rollers and universal joints are often twisted or broken, which seriously affects production

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