A separate roll changing device for the upper middle roll

Abstract

The invention relates to an independent roll replacement device of an upper middle roll. The independent roll replacement device is suitable for a small-roll-diameter six-roll mill, the small-roll-diameter six-roll mill comprises work rolls, middle rolls and bearing rolls, and the upper bearing roll, the upper middle roll, the upper work roll, the lower work roll, the lower middle roll and the lower bearing roll are arranged from top to bottom in sequence and are supported on respective bearing pedestals through rotary bearings respectively. The upper and lower bearing rolls, the upper and lower middle rollers and the upper and lower work rolls are respectively in axial symmetry relative to a rolling line. Middle roll bending and channeling devices are arranged at the shaft ends of the middle rolls, and bearing roll balancing devices and a roll gap adjusting hydraulic cylinder are arranged on the lowest portion of a rack. The central line of the rack is vertically arranged in the center of the rack. The independent roll replacement device is arranged on the upper middle roll, and the upper middle roll can smoothly achieve the independent roll replacement operation by arranging the independent roll replacement device on the upper middle roll in a certain design gap between the upper middle roll and the upper work roll.

Description

technical field [0001] The invention relates to a separate roll changing device for an upper intermediate roll, which is suitable for a six-high rolling mill with a small roll diameter. technical background [0002] The six-high rolling mill is a mainstream type of strip rolling with mature technology. It has the advantages of high output, high quality of finished products, low consumption, low difficulty in equipment manufacturing and low maintenance. Its main structure is as figure 1 As shown, it includes a rolling line adjustment device 101, an upper backup roll 102, an upper intermediate roll 103, an intermediate roll bending roll shifting device 104, an upper work roll 105, a work roll bending hydraulic cylinder 106, a work roll bending block 107, The lower working roll 108, the lower intermediate roll 109, the frame 110, the lower backup roll 111 and the roll gap adjustment hydraulic cylinder 112. The rolling line adjustment device 101 is used for adjusting the heigh...

AI Technical Summary

Problems solved by technology

However, this solution has the following problems: First, considering the thermal effect during the rolling process, the work roll and its parts will undergo thermal expansion, and the bending blocks on both sides of the work roll bearing are rigidly supported, so the work roll bearing There is generally a gap of 0.2-0.5mm between the seat and the adjacent bending block

Because the main factors that generate the horizontal force of the upper and lower work rolls are the different rolling moments of the upper and lower rolls, the horizontal forces of the two rolls are different, and the two rolls move at the same time, and the horizontal movement is the same, only the upper and lower rolls can be considered. The above-mentioned horizontal force margin has to be increased, and the horizontal force of the roller body cannot be reduced to the greatest extent

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