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Multiple piece roll

A multi-piece, roll technology, applied in the direction of roll, metal rolling, metal rolling, etc., can solve the problems of roll nonlinear stiffness, rapid wear, damage, etc., and achieve the effect of reducing the weight of the billet

Inactive Publication Date: 2008-10-22
SIEMENS VAI METALS TECHNOLOGIES GMBH & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rapid wear and damage due to roll deflection changing with each revolution
Additionally, any slippage or separation between the sleeve and core would result in a non-linear stiffness of the roll
This creates a major problem with the thickness control systems used on most rolling mills

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] FIG. 1 shows a roll according to the invention with three roll parts 1 , 2 , 3 . The joint 6 is arranged outside the support area for the bearing 7 . The center line at the roll neck 12 shows the center line of the bearing 7 which is arranged in the roll chock. The main part 1 comprises the roll barrel 1 and the parts 12 of the roll neck. The end pieces 2 and 3 are fixed to the main piece 1 by means of joints 6 . The main part comprises a central bore 4 which can be manufactured as a bore with a constant bore diameter, or with an adjustable diameter depending on the axial position. This joint is described in more detail in Figure 3.

[0028] Figure 2 shows a different embodiment of the roll of the invention. The joints are arranged close to the roll barrel ends which are essentially formed by the main part 1 . The roll comprises two end pieces 2 and 3 joined to a main piece 1 . The end piece can be designed with a central hole 5 . The diameter of the center hole ...

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PUM

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Abstract

The invention relates to the design of multiple piece rolls, in particular backup rolls, for the use in metal rolling. The roll comprises a main part (1) with a centre bore (4) for the removal of centre defects or flaws arising from the manufacturing process, e.g. from casting or forging and at least an end part (2, 3), whereas the end part (2, 3) has no centre bore or a centre bore (5) with a diameter smaller than the bore diameter of the main part (1).

Description

technical field [0001] The present invention relates to designs and methods of manufacturing multi-piece rolls, particularly back-up rolls, for rolling metals, such as rolling steel or aluminium. Typically, in known systems, backup rolls are used to support the work rolls in the rolling mill. It is desirable to keep the diameter of the work rolls small, as this keeps rolling loads and moments as low as possible. However, small diameter work rolls tend to bend under rolling loads. Larger diameter backup rolls are used to support the work rolls, minimizing roll bending under load. A 4-high mill stand consists of 2 work rolls and 2 backup rolls, while the same principle can be used for other mill configurations such as 6-high mills. Background technique [0002] In most modern rolling mills, the back-up rolls are manufactured as a single piece by forging or by casting. For large rolling mills, such as plate rolling mills, the back-up rolls may be greater than two meters in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B27/02B21J5/00B21K1/10
CPCY10T29/49988B21B27/03Y10T29/49556B21B27/02B21B13/14B21B2203/18B21B2269/18
Inventor B·库帕S·塔斯
Owner SIEMENS VAI METALS TECHNOLOGIES GMBH & CO