CS260246B1 - Equipment for balancing rollers of multi-cylinder stools - Google Patents

Abstract

The purpose of the device is to ensure a quick and safe replacement of intermediate rolls when the multi-roll rolling mill is shut down. This purpose is achieved by means of swinging guides equipped with sliding rails, with which the first intermediate rolls are in permanent contact, while the upper gates are movably connected to the upper part of the rolling mill stand by means of balancing elements.

Description

BACKGROUND OF THE INVENTION The present invention relates to a device for balancing multi-roll mill rollers, in particular first intermediate rollers of twenty-roll mill stands and the like.

Until now, the intermediate cylinders of the multi-cylindrical cylinders have been balanced by hanging them on the balancing elements by means of sleeves with a rolling or sliding bearing mounted on the pins of these cylinders. The balancing elements are most often springs or hydraulic cylinders arranged in pairs for each balancing cylinder, one balancing element being on the operator side and the other on the stool drive side. The balancing elements are pivotable to allow the position of the intermediate cylinders to be altered when adjusting the entire set of cylinders of the multi-cylinder sewer. The cylinder set is divided by the rolling plane into lower and upper halves. material guides are provided between the two halves of the roll assembly. These guides serve both to guide the rolled strip in the passage of the mill stand and as channels for supplying coolant between the work rolls. The position of the material guides is then fixed or manually adjustable.

A disadvantage of said solution is that the balancing elements of the intermediate rolls spatially limit the possibilities of combining the full range of desired diameters of these rolls given by the selected geometry of the multi-roll mill assembly. In most designs of balancing elements, the operator's participation on the stool drive side is also required when replacing the intermediate cylinders.

Tim 9e extends the time to change the cylinders, ie. and downtime of the whole rolling mill. The operator's work on the back of the stool is subject to the risk of injury in a polluted environment, flooded with oil and in a confined space 9. When inserting and removing intermediate cylinders from the stand, these are carried by the mounting device sleeve unilaterally by its pin, which at the same time is a pin for the balancing sleeve.

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When the sleeves are replaced when the cylinder is in the stool stand space, a situation arises in which it is not securely fixed by either the balancing device or the mounting device. The operator solves this problem by temporarily supporting the first intermediate rollers, for example with wooden snakes, which are not well fixed in the rugged and oily space of the bench. When the substrate is reversed, the roller falls out of the stool, its surface is damaged and the safety of the operator is endangered and possibly injured.

These disadvantages are eliminated by the roller balancing device of the multi-roll mill according to the invention, wherein the material guides are pivotably attached in supporting bodies fixedly connected to the roll stand.

The principle of the device according to the invention is that each material guide is provided at the end with a sliding bar with which it is

by continuously touching the respective cylinder of the upper and lower first intermediate cylinders. The upper material guides are then provided with hinges which are movably coupled to the hinges of the upper portion of the roll of the roll stand by balancing elements.

In particular, the device according to the invention consists in the rapid and safe replacement of the intermediate rollers when the stool is shut down. In operation of the mill, the first upper intermediate rollers are balanced by the upper guides of the material, the lower guides lying permanently on the slide rails. first lower intermediate cylinders. This is ensured by creating a gap between the working rollers as well as smooth opening and closing. gripping the material guides and forming a respective lead gap.

The device for balancing the rollers of multi-roll stands according to the invention is exemplified schematically in the attached drawing, where the left half / view is a front view and the right half a partial vertical section of a multi-roll stand.

The device according to the invention consists of two pairs of guides 8, material 14, which are articulated by means of joints 12 pivotably mounted in support bodies 11 fixedly connected to the stand 1 of the rolling stand. Each guide 8, 9 is provided at the end with a sliding bar 10, with the upper first intermediate cylinders 4 lying on the sliding bars 10 of the upper guides 8 and the sliding bars 10 of the lower guides 9 loosely resting on the surface of the lower first intermediate cylinders 5. hinges 7 which

260 246 are coupled by means of balancing elements 6, e.g. springs, to hinges 15 of the upper part of the stand 1 of the rolling stand. The first intermediate rollers 4, 5 are then in permanent contact both with the working rollers 13 and with the second intermediate rollers 3, which are supported by the support rollers 2.

The function of the device according to the invention is as follows. During operation of the roller mill, the upper guides 8, lifted by the balancing elements 6, permanently press the upper first intermediate cylinders 4 to the upper second intermediate cylinders 3, supported by the support rollers 2 via the slide rails 10. In forming a gap between the working rolls 13, the upper and lower guides 8, 9 follow the movement of the upper and lower first intermediate rolls 4, 5, and by creating a larger gap, assist in the introduction of material 14 into the working rolls 13. The upper and lower guides 8, 9 are directed again into the rolling gap between the working rolls 13 and create optimum conditions for cooling and cooling the material 14. Upon removal of the upper first intermediate rolls 4, the balancing elements 6 are removed after removing the working rolls 13. and an upper guide 8 is rotated in the articulation 12 and at one end engage on the underside of the guide ninth H RNI _of the first intermediate rolls 4 are released from contact with the top second intermediate rolls 3 and will lie on the sliding rails 10 of the upper guide 8, ready for simultaneous removal. Then, the lower guides 9 are fastened to the upper guides 8 and the two pairs of guides 8, 9 are lifted by the balancing elements 6 until they clear the space above the lower first intermediate cylinders 5 'and thus release them for simultaneous removal. The insertion of the new first intermediate rollers 4, 5 is then carried out in the opposite way.

Claims (1)

A device for balancing rollers of multi-roll stands, wherein the material guides are articulated by pivotal attachments in support bodies fixedly connected to a stand of the rolling stand, characterized in that each guide (8, 9) of the material (14) is provided at the end with a slide bar (10). ) with which the cylinder of the upper and lower first intermediate cylinders (4, 5) is in permanent contact '; wherein the upper material guides (14) are provided with hinges (7) which are movably connected to the hinges (15) of the upper part of the stand (1) of the rolling stand by means of balancing elements (6).