Twenty-high rolling mill swing arm bracket system for the first intermediate roll

Abstract

The invention belongs to the technical field of plate and strip rolling, and specifically relates to a first intermediate roll swing arm type bracket system of a twenty-high roll mill. The system consists of two swing arm type bracket devices which are vertically symmetric about the center of the twenty-high roll mill and arranged below two first intermediate rolls, and the swing arm type bracket devices comprise swing arm brackets arranged below the first intermediate rolls and fixed supports which are connected with the swing arm brackets by virtue of swing arm hinged shafts; the fixed supports are arranged on a driving side of a twenty-high roll mill rack, the fixed supports are provided with swing arm oil cylinders, the tail parts of the swing arm oil cylinders are articulated with the fixed supports by virtue of cylinder body hinged shafts, and rod ends of the swing arm oil cylinders are hinged with the swing arm brackets by virtue of cylinder rod connection shafts. The bracket system can swing the brackets during roll replacement, the intermediate rolls are enable to fall without performing manual operation on the mechanism at the driving side of the twenty-high roll mill by workers, and the intermediate roll replacement is rapidly and efficiently realized.

Description

technical field [0001] The invention belongs to the technical field of plate and strip rolling, and in particular relates to a swing-arm bracket system for the first intermediate roll of a twenty-high rolling mill. Background technique [0002] In the field of metal strip rolling, the 20-high integral stand mill is widely used in the production of stainless steel strips, silicon steel strips and precision alloy strips due to its small diameter of work rolls, high rigidity of the roll system, and high pass reduction rate. . However, the structure of the tower-type roll system of the 20-high rolling mill is complex. This tower-type roll system is generally driven by the second intermediate roll, while the two ends of the first intermediate roll are in a suspended state. There is no support at both ends of the first intermediate roll, which cannot realize the normal operation of the rolling mill. In the roll gap opening operation of threading, the upper intermediate roll will ...

AI Technical Summary

Problems solved by technology

However, the structure of the tower-type roll system of the 20-high rolling mill is complex. This tower-type roll system is generally driven by the second intermediate roll, while the two ends of the first intermediate roll are in a suspended state. There is no support at both ends of the first intermediate roll, which cannot realize the normal operation of the rolling mill. In the operation of opening the roll gap of the belt threading, the upper intermediate roll will fall on the working roll due to its own weight. There are two methods commonly used in the existing technology to solve this problem.

[0003] A suspension balance method is used to suspend the two ends of the intermediate roll with springs to balance the weight of the intermediate roll itself. This method is convenient and reliable on the operation side, but for the transmission side, since this type of rolling mill basically uses the second intermediate roll The transmission and suspension springs often interfere with the transmission shaft of the second intermediate roller from the spatial structure, which makes it difficult to assemble and debug the method in practice. In addition, when changing the first intermediate roller, this solution requires manual inspection from the operating side every time. Detour to the transmission side to remove the suspension spring, and then install it after changing the rollers. These have brought great inconvenience to normal production, and there are potential safety hazards, resulting in a long roller changing time.

[0004] In another method, support blocks are designed on the front and rear doors of the rolling mill. When the rolling mill is working, the front and rear doors are closed to support both ends of the first intermediate roll. Because this method limits the axial movement of the first intermediate roll in space, the two The first intermediate roll lateral movement of the ten-high rolling mill, which is an important means of controlling the shape of the plate, cannot be realized, and its disadvantages are relatively large. In addition, this method can only ensure the support of the intermediate roll when the front and rear doors are closed. When the front door is open, it still cannot be moved middle roller support

The above two existing technical solutions have their own advantages and disadvantages, but taken together, they still cannot meet the high-efficiency, safe, and easy-to-operate production requirements of the 20-high rolling mill.

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