Eighteen-high mill

Abstract

The invention relates to an eighteen-high mill, and belongs to cold-rolling mills for rolling metal strips. The eighteen-high mill comprises a pair of working rollers and a middle roller, and the middle roller is in contact with the working rollers and used for driving the working roller. The eighteen-high mill is characterized in that, a pair of horizontal supporting rollers, which are in contact with the upper and lower working rollers correspondingly in the side directions, and supported and loaded by the rolling reactive force of the corresponding working rollers, is arranged at each of the inlet side and the outlet side of the mill in the conveying direction of the metal strips, so that each working roller is squeezed in the middle by the middle roller, and the corresponding pair of horizontal supporting rollers to be fixed relatively; each horizontal supporting roller is provided with a side pushing device which supports the corresponding horizontal supporting roller from the operating side to the transmission side in an overall roller body mode in the axial direction; and when the horizontal supporting rollers are in the working positions, the horizontal supporting rollers are in line contact with the working rollers in the axial direction of the working rollers all the time. The eighteen-high mill is more reasonable in relative layout, more purposeful in roller replacement, and more sufficient in lubricating and cooling, and borne force of backing shafts is more uniform.

Description

technical field [0001] The invention belongs to the field of metallurgical equipment, and in particular relates to a novel 18-high rolling mill structure. Background technique [0002] The cold rolling mill is the key equipment for the production of cold rolled strip steel. The surface quality, thickness tolerance and plate shape index of the finished strip steel are not only related to the incoming steel coil, but the cold rolling mill plays an important role. There are many types of rolling mills for producing cold-rolled strip steel, such as four-high rolling mills, six-high rolling mills, eighteen-high rolling mills and twenty-high rolling mills. However, for rolling difficult-to-deform materials and thin strips, the eighteen-roller has obvious advantages, mainly in the following aspects: (1) The diameter of the work roll of the eighteen-high rolling mill is small, and the diameter of the work roll and the width of the roll surface The ratio can reach 1:10, the deformat...

AI Technical Summary

Problems solved by technology

But it also has disadvantages: small mill opening, poor lubrication and cooling effect, low speed, inconvenient equipment maintenance, high equipment cost, etc.; SMS company's Z-high eighteen-high rolling mill (WO2004052568) has made Further optimization, and a new design of the horizontal movement function of the work rolls, improved the beam assembly arm device of the intermediate roll group (WO2011003561)

However, it is time-consuming and labor-intensive to replace the side support backing bearings in its rolling mill. First, the middle roll and the side support roll boxes on both sides must be pulled out of the frame, and then a new set of middle roll and side support roll boxes must be replaced. The tedious disassembly and installation work offline increases the labor cost and time cost; the S-High eighteen-high rolling mill (WO0121334) of SUNDWIG Company under DRITZ proposes a more convenient and concise method for the replacement of side supports. Remove the side support roll box installed on the side support beam, and then pull out the side support roll box separately for backing bearing replacement, which simplifies the process of pulling out the middle roll, disassembling and installing the entire middle roll and side support roll box, but still needs Complete side support roll cassettes are pulled out of the mill housing and excessively worn or damaged backing bearings are replaced

Although only one backing bearing of one row of backing bearings needs to be replaced, the entire side support roller box needs to be pulled out, and the installation fixture shared by the two rows of backing bearings needs to be removed, and then the bearings are replaced. The replacement process is quite cumbersome time consuming

The most important point is that the above three 18-high rolling mills have a common feature. Two rows of backing bearings with the same outer diameter are installed on the same side support beam, and the position is relatively fixed. The same driving force is different (the actual situation is close to the strip. The force of that row of backing bearings is much greater than that of the other row), the life of the backing bearings is different, and the backing bearings that do not need to be replaced are frequently dragged out of the rack

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