Rolling apparatus

Abstract

A rolling apparatus, including a stand, at least two rolls, which are attached to the stand by chocks and are displaceable in relation to one another in the axial direction, and at least one axial displacing device, which is assigned to a chock of at least one of the rolls and can act on this chock. The axial displacing device has a fixed block, at least one displaceable bending block and at least one displacing cylinder, which is assigned to the bending block and by which the bending block can be displaced in relation to the fixed block. The fixed block is of a multipart form.

Claims

1. A rolling apparatus, comprising: a stand, at least two rolls, which are attached to the stand and are displaceable in relation to one another in the axial direction, and at least one axial displacing device, which is assigned to at least one of the two rolls and can adjust the assigned roll, wherein the axial displacing device further comprises: a central displacing bracket, an upper retention bar, a lower retention bar, wherein the upper retention bar and the lower retention bar are respectively disposed above and below the central displacing bracket and mounted on roll supports of the stand, an upper bending block between the central displacing bracket and the upper retention bar, a lower bending block between the central displacing bracket and the lower retention bar, and displacing cylinders which are assigned coaxially to each respective bending block and by which each respective bending block is configured to be displaced synchronously together with the at least two rolls, and a respective bending cylinder is accommodated in each of the bending blocks.

2. The rolling apparatus as claimed in claim 1, wherein the central displacing bracket is formed in the form of a forged part.

3. The rolling apparatus as claimed in claim 2, wherein the central displacing bracket is produced from forged rod material.

4. The rolling apparatus as claimed in claim 1, wherein the retention bars are each produced as single parts from sheet metal.

5. The rolling apparatus as claimed in claim 1, wherein the retention bars are mounted on spars of a support of the stand.

6. The rolling apparatus as claimed in claim 1, wherein each displacing cylinder assigned to each respective bending block is flanged onto an end plate connected to the fixed block, and a piston rod of each displacing cylinder interacts with each respective bending block.

7. The rolling apparatus as claimed in claim 1, wherein the bending blocks and the displacing cylinders are constructed modularly as independent structural elements.

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) Exemplary embodiments of the invention are described in detail in the following on the basis of a schematic simplified drawing.

(2) In the figures:

(3) FIG. 1 shows a perspective view of two lateral spars of a rolling apparatus according to the invention;

(4) FIG. 2 shows a perspective view of a fixed block as part of an axial displacing device, which is used in the rolling apparatus of FIG. 1;

(5) FIG. 3 shows a perspective view of an axial displacing device which is used in the rolling apparatus of FIG. 1;

(6) FIG. 4 shows views of a conventional axial displacing device and parts thereof; and

(7) FIG. 5 shows views of a conventional axial displacing device and parts thereof.

DETAILED DESCRIPTION

(8) A preferred embodiment of a rolling apparatus 100 according to the invention is illustrated and explained hereinafter with reference to FIGS. 1 to 3, in which by means of an axial displacing device 108 (cf. FIG. 3), a rolling gap (not shown) can be set variably in rolling operation of the rolling apparatus 100. Identical features in the drawing are each provided with identical reference numerals. It is particularly to be noted here that the drawing is solely shown in simplified form and in particular not to scale.

(9) FIG. 1 shows by way of example the rolling apparatus 100, which is designed as a so-called four-high mill, in which two working rolls 104, 105 and adjoining thereto two backup rolls (not shown) are provided on a stand 102. Alternatively thereto, a different number of rolls is also possible, for example in the form of a six-high mill, in which additional intermediate rolls are also provided between the working rolls and the backup rolls. In any case, a rolling gap for the material or metal strip to be rolled is formed between the working rolls 104, 105. The profile of this rolling gap is set by an adjustment of the working rolls 104, 105. In this case, the profile of the rolling gap can be set suitably with the aid of the axial displacing device 108.

(10) According to the illustration in FIG. 1, the two working rolls 104, 105 are held in the stand 102 of the rolling apparatus 100, wherein the spars 9 of a support of this stand 102 are also shown. At least one of the working rolls 104, 105 can be displaced in the direction of its axial extension by the axial displacing device 108. Further details of this axial displacing device 108 are explained in more detail hereinafter.

(11) The axial displacing device 108as is apparent from the perspective view of FIG. 2comprises a fixed block 110, which is of a multipart form, namely in the form of a central displacing bracket 116 and separate therefrom two separate retention bars in the form of an upper retention bar 117 and a lower retention bar 118. The retention bars 117, 118 are installed on the roll supports of the stand 103 of the rolling apparatus 100 (cf. FIG. 1).

(12) The axial displacing device 108 comprises displaceable bending blocks, namely an upper bending block 112 and a lower bending block 113, wherein these bending blocks 112, 113 are displaceably guided along the displacing bracket 116. Specifically, the upper bending block 112 is arranged between the displacing bracket 116 and the upper retention bar 117, wherein the lower bending block 113 is arranged between the displacing bracket 116 and the lower retention bar 118. This is shown in the perspective view of FIG. 3.

(13) Displacing cylinders 114 are respectively provided for displacing the bending blocks 112, 113 along the displacing bracket 116, which cylinders are each arranged outside the bending blocks 112, 113 and are flanged onto an end plate 120 connected to the fixed block 110. The piston rods of the displacing cylinders 114 penetrate the end plate 120 and are fastened on the bending blocks 112, 113. The bending blocks 112, 113 are displaced as intended along the displacing bracket 116 or relative thereto by actuating the displacing cylinders 114.

(14) It is to be particularly noted at this point that the feature according to which a piston rod 115 (cf. FIG. 3) of a displacing cylinder 114 interacts with an (assigned) bending block 112, 113 is to be understood to mean that the piston rod 115as just explainedis connected using an end side thereof fixedly to the bending block 112, 113. As a result, the bending block 112, 113, upon a translational movement of the piston rod 115, is displaced synchronously thereto along the displacing bracket 116, namely in both directions.

(15) The bending blocks 112, 113 of the axial displacing device 108 can be assigned working roll chocks (not shown) and can act on these chocks upon an actuation of the displacing cylinders 114. A displacement of the bending blocks 112, 113 thus results in a corresponding axial displacement of the working rolls 104, 105, whereby a desired profile of the rolling gap is achieved.

(16) A bending cylinder 122 is accommodated in each of the bending blocks 112, 113 (cf. FIG. 3), using which a targeted bending of an assigned working roll is achieved. Only the head of such a bending cylinder 122 can be seen in the illustration of FIG. 3.

(17) A supply of the displacing cylinders 114 with operating means, in particular with hydraulic oil, can be achieved by a pipe system (not shown), which is preferably connected fixedly or permanently to the displacing cylinders 114.

(18) The bending blocks 112, 113, on the one hand, and the displacing cylinders 114, on the other hand, are constructed modularly and are thus designed as independent structural units. This enables simple and inexpensive installation of the axial displacing device 108 and if needed also a possible replacement of these structural units in case of required repairs or maintenance of the rolling apparatus 100 according to the invention.

LIST OF REFERENCE NUMERALS

(19) 100 rolling apparatus 102 stand 103 spars (of a support of the stand 102) 104-105 rolls 108 axial displacing device 110 fixed block 112 upper bending block 113 lower bending block 114 displacing cylinder 115 piston rod (of a displacing cylinder 114) 116 central displacing bracket 117 upper retention bar 118 lower retention bar 120 end plate (of the fixed block 110) 122 bending cylinder