UA107203C2 - COMPACT REVERSE UNIVERSAL ROLLING STATE FOR MIDDLE-SIZE PROFILE - Google Patents

Abstract

Compact reversible universal rolling mill for medium to large profile production, comprising a universal reduction cage (14), a two-roll cage (15) and a universal cage (16) to create a reversible intermediate block (12) oriented transversely to the guide roller (13) ), which feeds the treated strip (17), said rolling mill having immediately after the technological process mentioned reversible intermediate block (12) net cage (11) as a final additional cage, also oriented across to the common of the rolling guide (13) or correspondingly capable of moving perpendicularly (in accordance with arrow F) relative to said rolling guide (13), the finishing stand (11) being kept open or closed during the intermediate passes of the production cycle and closed or used accordingly the rolling guide (13) only before the end (17) of the final pass of the production cycle is completed.

Description

Another challenge is to provide a reversible rolling mill that is more compact than currently available rolling mills.

Another challenge is to provide a reversible rolling mill that minimizes the cost of installation associated with construction work and required storage.

Taking into account the above-mentioned problems, this invention describes a compact reversible universal rolling mill for the production of medium-sized to large profiles having the characteristics given in the appended claims.

The structural and functional features of the present invention and its advantages compared to the rolling mill of the prior art will become even more obvious by analyzing the following description, which refers to the attached drawings, which depict an embodiment of a compact reversible universal rolling mill for the production of medium-sized - large profiles according to this invention. In the drawings: - Figure 1 depicts the key elements of a compact reversible universal rolling mill for the production of medium to large profiles according to the present invention; - Figure 2 shows the first embodiment of the installation, known as "I 5pare", which contains a rolling mill according to the invention; - Figure 3 shows the second version of the installation, known as "O 5Pare", which contains a rolling mill according to the invention; - Figure 4 shows a third embodiment of a mixed type of installation, which also includes a rolling mill according to the invention. Referring mainly to Figure 1, we see that a compact reversible universal rolling mill for the production of medium-sized to large profiles is indicated in general by item 10.

As shown, according to the present invention, the reversible universal rolling mill 10 provides for the use of the finishing universal cage 11 as the final additional cage in the reversible intermediate block 12, oriented transversely to the guide roller 13, along which the processed strip 17 is fed.

The reversible intermediate unit 12 contains the first universal reduction cage 14, a two-roll cage and the second universal reduction cage 16.

The function of this additional cage 11 does not change when it is used exclusively for finishing. Therefore, cage 11 is always open during intermediate passes and is closed only before the end of the last pass of the strip in the production cycle.

In an alternative solution, in which only the arrow E is present in Figure 1, the cage 11 is kept closed in reserve away from the rolling guide 13 and is connected only before the final passage of the lane 17.

Therefore, the cage 11 moves perpendicular to the direction of movement of the strips 17, which are gradually processed by it. This movement, for example, is carried out by the corresponding drive unit indicated by position 18, which is connected and disconnected from the drives belonging to the cage 11 if possible.

This guarantees consistent roll change times, providing the above production benefits.

This scheme consists of an X - X - H solution that uses a reversible rolling mill that contains four full cages that essentially limit the distance between the finishing cage 11 and the reversible intermediate unit 12.

In fact, this cleaning cage 11 is no longer located away from the reversible intermediate unit 12, as described in the prior art, but is located directly behind the last universal cage of the same reversible unit 12.

This provides an overall installation length that is shorter than that of the solution used today and therefore less mechanical equipment and a smaller overall area for storage with a rolling stock with obvious benefits for the customer in terms of whether it is ready for immediate use , or not.

The presence of an additional finishing cage also improves the quality of the final product, as well as improves the flexibility of the process.

In addition, the option of offering the customer even more compact installations, such as the installations according to the present invention, allows for contracts where installation space is not critical, as well as contracts where the actual production layout is important for the installation of rolling stock. state

The increased production compensates for the higher initial cash costs of the plant according to the invention compared to known plants in less than one year of operation of the plant, depending on its capacity and the number of tons of product per production cycle.

The service life of the rollers of the universal cleaning cage according to the present invention is approximately 2000 || for smaller profiles and about 3000 || for larger profiles.

This could mean that for shorter lifetimes using our solution, the plant would never need to stop to change rollers compared to one or two stops to change rollers in a prior art finishing cage. Similar gains can be made for longer lifetimes, which reduce the number of stops to a maximum of one for changing the finishing cage rollers.

This ensures consistent roll change times, providing the above production benefits. The proposed solution may be called "XXN".

The advantages of the ХН solution compared to the existing solution are the smaller total area occupied by the installation and the option, which consists in the production of two lamellar strips on the resulting bloom with optimization of the furnace load.

With the help of the ХХН solution, the structural part of the installations is much cheaper.

From the perspective of operation, the proposed scheme makes the installation more compact or, in any case, significantly optimizes the process. The proposed solution provides a system with a single replacement for the cages of the reversible rolling mill and, therefore, a more compact workshop for the processing of rolling rolls, a reduced and optimized use of overhead cranes, a more rational use of spare parts and, therefore, a better use of storage. This naturally requires a smaller number of service personnel and shorter periods of replacement of structural elements in rolling condition (4 adjacent cages allow the presence of only one operator).

In addition, the operation of the warehouse and the movement of the cage, facilitated by the rational use of spare cages, also allows the remote location of the shop for the processing of rolling rolls in different places without worsening its operation and, therefore, the productivity of the rolling stock.

The "I Zpare" solution, shown in Figure 2, provides a more compact layout and allows the use of shorter rolling guides, lubrication, hydraulic, air, water and oil pipelines, reducing the impact on the duration of operation and maintenance.

In this version of the installation, the furnace 21 with appropriate auxiliary means (such as the device 23 for removing scale) is located from above in the course of the technological process in front of the draft block 24. Behind it is the rolling mill 10 according to the invention in front of the cooling device 27, the cutting blocks 29 and the final blocks

In a very similar way, the "O 5Ppare" solution shown in Figure 3, with the cooling device 27 located further to the side (due to the necessary layout of the equipment for stacking, binding and sorting of the final product), in any case, provides a more compact circuit after moving the end cage. In any case, a compact solution can allow the use of space after optimizing the finishing cage and increasing the distance between it and the cooling device for less money, making it possible to roll the original profile with a longer final product that is heavier and cut into many segments using a saw in front of the cooling device. This naturally improves product yield and plant productivity for less capital investment.

Figure 4 shows a third embodiment of an installation that includes a rolling mill according to the present invention and which combines the characteristics of the "I 5pare" installation with the characteristics of the "O 5Ppare" installation described before, combining and adapting them. In short, we can talk about the following advantages in relation to the patent of the ZMO company: - advantages due to a reduction in the number of replacements of structural elements of the finishing cage, which leads to fewer plant stops and, therefore, to higher productivity; - moreover, a smaller number of replacements of structural elements reduces the time and money spent on the preparation of the finishing cage in the workshop; - optimization of the operational resource of the finishing roller, which in the proposed solution performs only the function of finishing, and not the reduction function, which also makes it possible to reduce capital investment for a number of rollers; - the solution with 4 cages provides more flexibility in rolling and is able to use both reduction passes for each sequence of passes, allowing to increase the productivity of the installation; - better tolerances for the final product, because the cleaning cage has a special groove that wears less over time.

And the following advantages compared to the previous unit (3-1) with a separate cleaning cage, i.e.: - reduction of the spaces required for the production of the profile; - lower energy consumption, as the strip undergoes final processing directly after rough processing without additional temperature losses.

The above description with reference to the figures clearly shows how a compact reversible universal rolling mill for the production of medium-sized to large profiles according to the invention can be particularly useful and profitable. Thus, the problem specified in the introductory part of the description is solved.

Generally, the shapes of the compact reversible universal rolling mill for the production of medium-sized to large profiles according to the invention may be different from the shape depicted solely as a non-limiting example in the drawings, and the materials used may also be different.

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Therefore, the scope of legal protection of the invention is determined by the attached claims.

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