Guilin Mining Machinery Co., LTD.

Vertical Rolling Mill Wiki

The vertical rolling mill is generally composed of a rack, a press down system, a driving device and a vertical roll system. The vertical roller is driven by the motor through the reducer and universal-joint spindle. The motor of the upper drive vertical roll mill is usually installed vertically. The vertical roll mill with lower drive is usually driven by horizontal ac motor through spline shaft, bevel gear and straight gear. The vertical roll is assembled in a removable rolling mill roll frame. The mechanical press system generally adopts ac frequency conversion motor to drive the screw down by worm reducer to complete the press down action.

The vertical roller and the mill roll rack are moved through the hydraulic cylinder, and have the functions of automatic width control (AWC) and short stroke control (SSC). It can match the plane shape control technology to improve the dimensional accuracy of the width of the steel plate, and also effectively control the shape of the head and tail of the steel plate. Two hydraulic cylinders are equipped with built-in displacement sensors for accurate positioning. Before rolling, the AWC must be in a "connection" state. The roll gap is first adjusted to the set position, which varies with the thickness of the rolling piece and the rolling force.

The vertical rolling mill can be divided into upper or lower transmission vertical rolling mills according to the transmission mode. According to the way of motor installation, it can also be divided into horizontal motor drive and vertical motor drive mode. The split vertical rolling mill mainly adopts underdrive, and only a small number of vertical rolling mills are used abroad. The upper vertical transmission mill is mainly driven by upper drive, but the lower part of the rolling mill is used in some rolling mills.

The upper drive vertical rolling mill is usually attached to the inlet or outlet side of the mill. Compared with the underdrive, the drive mechanism is simple and easy to maintain. However, this type of machine is large in size, heavy in equipment and relatively high in investment, which seriously affects the operating line of sight, making operators unable to monitor the rolling state of this area and difficult to make a quick response when abnormal accidents occur. The lower drive vertical rolling mill has wider space above the rolling line and has a good line of sight. However, the main parts are all below the rolling line, with deep equipment foundation, small maintenance space, complex transmission mechanism, poor working environment and difficult equipment maintenance and maintenance.
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