Sheet rolling mill with hydraulic screwdown on support roll

Abstract

The invention relates to a sheet rolling mill with a hydraulic screwdown on a support roll. The mill is characterized in that a frame is a horizontal rectangular columnar frame, both sides of an upperbeam of the frame is provided with a journal hydraulic screwdown of an upper support roll, a bearing pedestal and two rectangular columns of a working roll and the support roll form two horizontal frames of the mill, hydraulic screwdown of one or two support rolls which are fixed in the middle of the upper beam of the horizontal frame press a cylindrical surface of the support roll body by a hydrostatic semicircular block, a hydrostatic semicircular block with a bearing is supported in the position of a lower support roll which is the same as that of the upper support roll, the bearing is fixed on a lower beam of the frame. The mill has the following advantages: the position and pressure of the hydraulic screwdown of the journal and the roll body are regulated by a sensor to greatly reduce elastic deformation of the support roll during working, and can realzie rolling of the accurate-sized steel plate and increase percent reduction under the condiiton of reducing number and diameter of the supprt rolls and diameter, thus reducing cost and enhancing efficiency.

Description

technical field [0001] The invention belongs to a steel plate rolling mill, in particular to a steel plate rolling mill with a back-up roll body equipped with a hydraulic pressing device. Background technique [0002] Existing steel plate rolling mills are only provided with a hydraulic press-down device (referred to as journal hydraulic press-down device) on the journal bearings of the support rolls to adjust the size of the roll gap and achieve thickness control, but it cannot limit and reduce the deformation of the roll body. The pressing device is a kind of oil cylinder, which is equipped with pressure and displacement sensors, which can adjust the roll distance and oil pressure. Therefore, in order to reduce the deformation of the work rolls, it is necessary to make the support rolls very thick, and sometimes even increase the number of support rolls. , to offset the deformation of the work rolls caused by the rolling force to meet the requirements of the steel plate th...

AI Technical Summary

Problems solved by technology

[0002] Existing steel plate rolling mills are only provided with a hydraulic press-down device (referred to as journal hydraulic press-down device) on the journal bearings of the support rolls to adjust the size of the roll gap and achieve thickness control, but it cannot limit and reduce the deformation of the roll body. The pressing device is a kind of oil cylinder, which is equipped with pressure and displacement sensors, which can adjust the roll distance and oil pressure. Therefore, in order to reduce the deformation of the work rolls, it is necessary to make the support rolls very thick, and sometimes even increase the number of support rolls. , to offset the deformation of the work rolls caused by the rolling force to meet the requirements of the steel plate thickness tolerance, so the rolling mill is made very large and the cost is high, and considering the deformation of the rolls, the amount of each reduction is also limited, which affects the work efficiency

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