CS200040B1 - Device for arrestment of articulated spindles - Google Patents

Description

(54)

Device for arresting spindle

The invention relates to a device for arresting articulated spindles, in particular intended for use in the replacement of working rolls of rolling mills.

During the rolling process, the worn working rolls are replaced after certain time intervals. Replacement is then most often done by axially extending the cylinder pins from the joint spindle sleeves. With these spindles, in a modern design on a rolling bearing, the sleeve remains firmly connected to the spindle and must therefore be spatially locked for retrofitting new work rolls. Until now, various types of portable lifting platforms have been used for this detent. lifting platforms arranged on the stand of the rolling stand. It is also known to consist of double collets provided with clamping jaws. Each collet closes, respectively. they open separately with a horizontal set screw. The whole device is arranged on the stand stand pin.

Existing installations have a number of drawbacks, and especially in the case of continuous billet tracks, there is a great deal of trouble and downtime during the disassembly and assembly of the rollers. The use of lifting platforms, whether portable or as part of a stand of the rolling mill, causes difficulties due to the insufficiently rigid position of the articulated spindle sleeves relative to the cylinder pins. In the case of collet-type devices, the change in the height of the sleeve axes and the practically impossible change in the pitch of the sleeves is problematic. As a result, during the disassembly, and in particular during the assembly, it rises and seizes the cylinder pins in the joint spindle sleeves. In special open rolling mills, where the joint spindle sleeves are pulled out of pra200 O4O pins on both ends

200 040 vascular cylinders, then the previously known locking devices cannot be used.

These disadvantages are overcome by the articulated spindle arresting device according to the invention, which consists of supporting columns, two adjustable semi-sleeves, adjusting elements and an adjustable element.

The device according to the invention is based on the fact that adjustable semi-sleeves, provided with cylindrical recesses for the articulated spindle sleeves, are fixedly connected to the supporting columns fixedly connected to the base plate by means of adjusting elements. element.

An advantage of the device according to the invention is that the sleeves of the articulated spindles are spatially positioned in a completely rigid position prior to disassembly. When installing new cylinder assemblies, it is possible to change the height of the axles of the spindle sleeves as well as the pitch of these axes in terms of manufacturing tolerances and elastic deformations. This arrest also stabilizes the articulated spindle sleeves against axial forces when extending and sliding the cylinder pins into the sleeves.

The device according to the invention is shown schematically in FIGS. 1 and 2 of the accompanying drawing, in which FIG. 1 is a side view of the device with the pins of the cylinders being pulled out of the articulated spindle sleeves, and FIG.

1 and 2 of the accompanying drawing, the device according to the invention consists of supporting columns 4 fixedly connected to the base plate 8. Furthermore, it consists of two adjustable semi-sleeves 7, 7 which are fixed by replacing the rollers 9, 10 by means of adjusting elements 3. The adjustable semi-wells 2 are provided with cylindrical recesses of the sleeve 6 of the articulated spindles 7. ee, when replacing the rollers 9, 10 of the rolling stands, the expanding element 5, eg a mechanical jack etc. is permanently in contact. then rotatably and pivotably mounted in the balancing device 11.

The function of the device according to the invention is as follows:

Jeou-11 rolls 9, 10 rolling stands, respectively. 1 of the rolling stand, set in the position for disassembly, the upper adjustable semi-sleeve 1 is pushed onto the supporting columns 4 of the device, which with the lower semi-permanent semi-sleeve 2 is adjusted by means of adjusting elements 3. the lower adjustable half-sleeve 8 ee raises the adjusting elements 3 until it forms the necessary gap between the lower cylinder pin 11, 10 and the lower articulated spindle sleeve 7 «Upper adjustable The adjusting elements 3 are then adjusted to the distance in the abutment of the cylindrical surfaces between it and the sleeve 6 of the upper hinge spindle 7 corresponding to the clearance between the pin of the upper cylinder 13 and 10 and the sleeve 6. The required clearance between the upper cylinder pin 9, 10 and the upper spindle sleeve 6 At the same time, the joint spindle sleeves 7 are spatially articulated and are ready for reassembly of the new roll set 9, 10. After assembly, the expansion element 15 is then released and removed, the lower adjustable semi-sleeve 2 is moved to the lower end position after release of the adjusting elements 3 and the upper adjustable semi- ^{sleeve ee} P ° is released from the support columns 4 of the device:

200 040

For some rolling mills, eg special open mills, the same two devices according to the invention can advantageously be used at the same time without changing the spirit of the invention.

Claims (1)

SUBJECT OF THE INVENTION Articulated spindle arresting device, consisting of support columns, two adjustable semi-sleeves, adjusting elements and an adjustable element, characterized in that they are fixedly connected to the support columns (4) firmly connected to the base plate (8) by means of adjusting elements (3) adjustable half-sleeves (1, 2), provided with cylindrical recesses for the sleeves (6) of the articulated spindles (7), with which the expanding element (5) is in permanent contact with the rolling mill rollers (9, 10).