Strip winding and unwinding device with automatic centering

Abstract

The invention relates to a device (12) for winding up and unwinding metal strips, used in particular for cold-rolling. This device has a spindle (21) which is mounted inside a hollow shaft and onto which the strip is wound; for this purpose the spindle is rotated by a motor (20) which actuates the hollow shaft by means of a mechanical transmission. In accordance with a preferred embodiment, the position of the hollow shaft along the axis of rotation may be adjusted by means of hydraulic actuators, in such a way as to compensate for any winding defects in the coil present on the spindle.

Description

[0001] This application is a divisional application. The filing date of the original application is February 16, 2001, the application number is 01805708.X, and the name is "Strip Automatic Centering Coiling and Uncoiling Device". technical field [0002] The present invention relates to devices for coiling and / or uncoiling of metal strip coils which occur in certain industrial processes, for example in certain metal strip rolling processes. Background technique [0003] Multi-cylinder or Sendzimir cold rolling mills are typical examples of such devices used. [0004] In such mills, the strip is passed back and forth between a pair of opposed revolving rolls mounted in cradles, with a series of reinforcing rolls in what is known as the "multi-roll" arrangement used in the Sendzimir process. [0005] For each rolling pass, the strip to be rolled is uncoiled from the coil and re-coiled onto another coil on the opposite side of the support: for this purpose, the above-mentioned...

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Problems solved by technology

[0019] It goes without saying, therefore, that the aforementioned fact significantly increases the complexity of the plant and, from the point of view of the use of its components, also creates an even more disadvantageous situation, since some of it (namely the uncoiler mounted on the uncoiler and other Those devices shown in Figure 1) are only operated at the initial stage of the production cycle and are no longer used for rolling strip

[0020] And it is obvious that the space required for the installation of the above-mentioned special equipment also greatly increases the overall size of the whole rolling mill

[0021] Finally, it must also be taken into account that the working time of the production cycle is increased due to the unrolled operation of the strip from the uncoiler, which occurs when the strip is fed at a lower speed and the tension is lower than that used for the actual rolling operation. The pulling force, that is, when the strip is rolled into one device 2 and uncoiled from the other device into the work roll 7

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