20-roll rolling mill comprising upper and lower splitting integrated roll box and method for replacing rolls thereof

Abstract

The invention provides a novel technical method for a split-type 20-roll rolling mill comprising a tower-type roll system and 8 rows of backing bearings. The invention simplifies positioning devices in upper and lower box bodies and realizes the overall positioning of same-level backup rolls, while the invention dispenses with an independent suspension device for positioning the backup rolls, so that the roll system can be dismantled rapidly and conveniently for the maintenance and services of the 20-roll rolling mill. The invention improves the process for machining the mounting part of the backing bearings of the roll box, so that the roll box can be stable and reliable in the operating process. The other improvement of the invention provides a method for rapidly changing the rolls of the 20-roll rolling mill. The method can pull out backup rolls or working rolls in each layer and adjacent backup rolls thereof at the same time, thereby greatly reducing the time for changing rolls andimproving the operating efficiency.

Description

Technical field: [0001] The invention relates to equipment for rolling metal plates and strips, which is a split rolling mill and belongs to the field of pressure processing of metal materials. Background technique: [0002] The 20-roll rolling mill with 8 rows of backing bearings and tower-shaped rolls is used for cold rolling processing of steel with high hardness. It is widely used and has high precision. Has a great market prospect. [0003] There are two types of box structures for the existing tower-shaped roller system with 8 rows of backing bearings and a 20-roll rolling mill. figure 1 ) The box body is an integrally cast rigid structure, and the end face is hollow in the shape of a plum blossom. It is the working space for the backing bearing, two layers of support rolls and work rolls. Inside the body, and the two ends of the support roller are also hoisted on the end face of the box by springs to prevent the upper support roller from falling. The sides of the b...

AI Technical Summary

Problems solved by technology

Its mechanism is complex, difficult to manufacture, and extremely inconvenient to maintain and repair.

Due to the limited eccentricity of the double eccentric sleeves and the small range of working roll diameters during operation, it is difficult to troubleshoot

This is a big problem that has plagued the Sendzimir mill for a long time

In addition, in the existing split box structure, the processing of the mounting position of the backing bearing adopts the semi-quincunx-shaped penetrating boring process. The horizontal rigidity of the processed box body is greatly reduced, and it cannot withstand the friction generated during the rolling process. Horizontal stress is prone to horizontal deformation, so the size and weight of the box must be increased to improve the horizontal rigidity of the box, thus greatly increasing the overall weight of the rolling mill and manufacturing costs

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