Plate strip rolling mill roller adjusting device

Abstract

The invention discloses a plate strip rolling mill roller adjusting device which comprises an upper roller bending device and a lower roller bending device. The upper roller bending device comprises an upper roller bending cylinder body, an upper extending-out roller bending piston rod and a lower extending-out roller bending piston rod. The upper extending-out roller bending piston rod abuts against a bearing seat of an upper working roller, and the lower extending-out roller bending piston rod abuts against a rolling mill rack. The lower roller bending device comprises a lower roller bending cylinder body. A piston rod of the lower roller bending cylinder body abuts against a bearing seat of a lower working roller. A piston rod which extends upward and downward is arranged on the upper roller bending cylinder body, and therefore the extension length of an unilateral piston rod is reduced to a half, the height of the upper roller bending cylinder body is further reduced to a half, installation space needed by the roller bending cylinder bodies is small, the plate strip rolling mill roller adjusting device is particularly suitable for a big opening degree rolling mill, meanwhile the piston rod becomes short, rigidity is increased, the problems of poor working stability of a roller bending cylinder, easy sealing damage and easy oil leakage of the cylinder bodies are solved, abrasion of the working rollers is more even and the service life is longer due to the fact that a channeling roll device is arranged.

Description

technical field [0001] The invention relates to a strip rolling mill, in particular to a roll bending and shifting device of the strip rolling mill. Background technique [0002] In the rolling process of the strip mill, it is necessary to improve and control the crown of the roll gap to achieve the purpose of controlling the shape and improving the quality of the shape. At present, hydraulic roll bending and roll shifting devices are widely used because of their convenient timely control, rapid change of roll gap shape, and strong plate shape control ability. [0003] In the roll bending device, there are usually two installation methods for the bending cylinder in the vertical direction: one is that the bending cylinder is fixed relative to the machine frame. In order to meet the requirements of the large opening of the rolling mill, the stroke of the upper bending cylinder It needs to be enlarged, and the extension of the piston rod of the bending roller cylinder is too ...

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Problems solved by technology

[0003] In the roll bending device, there are usually two installation methods for the bending cylinder in the vertical direction: one is that the bending cylinder is fixed relative to the machine frame. In order to meet the requirements of the large opening of the rolling mill, the stroke of the upper bending cylinder It needs to be enlarged, and the extension of the piston rod of the bending roller cylinder is too long, which will lead to poor working stability, easy damage to the seal, and easy oil leakage from the cylinder, so it is necessary to add guidance and protection measures for the bending roller piston rod; The cylinder body must also be lengthened, which in turn causes the installation space to fail to meet the requirements, so this method is not suitable for rolling mills with large openings

The other is that the roll bending cylinder is installed at the lower part of the upper back-up roll chock, which is suitable for rolling mills with large openings. However, this method has disadvantages such as complex structure of the upper back-up roll chock, inconvenient maintenance and disassembly of the roll bending device, and complicated hydraulic piping. High manufacturing, installation and maintenance costs

[0004] Due to the limited range of control of the roll gap crown by the bending device, it cannot fully meet the requirements for the control accuracy of the steel plate crown and flatness. At the same time, in order to make the wear of the work roll uniform, improve the service life of the work roll and reduce the grinding of the machine The number of times, it is necessary to adopt the roll shifting technology to move the work roll axially; and at present, there is no roll shifting device applied to the rolling mill with large opening (greater than 550mm)

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