PLANT FOR THE PRODUCTION AND THE PACKAGING OF STEEL RODS AND PROFILES

Abstract

A plant for the production and packaging of bars and steel profiles, comprising a rolling station (2) of rods and profiles (1) of indefinite length, a cooling station (3), a scrap separation station (4), a diverter device (5), a cutting shears (6), intended to cut said bars and profiles (1) in bar portions (1a, 1b) having a fixed length (LH), and a speed changing device (7), able to move the bar portions (1a, 1b) at a speed rate such that they can be placed within respective grooves or housing (18) provided on the outer surface of at least one cylinder or rotating drum (8a, 8b); each cylinder or rotating drum (8a, 8b) is associated with a speed changing device (7), so that the housing (18) receive bar portions (1a, 1b) at different speeds, depending on the fact that said housings (18) belong to one first (8a) or to at least second rotating cylinder (8b), in order to avoid overlap of the bar portions (1a, 1b) when the same are discharged onto the cooling plate (13).

Description

The present invention generally relates to a plant for the production and the packaging of steel rods and profiles.

More particularly, the invention relates to a system and to a method for the continuous production and packaging of bars and/or steel profiles from liquid metal, comprising a steel block, composed of a melting furnace for scrap and secondary metallurgy, a block casting, act in particular billets, a block of extraction, a rolling block and a finishing block for the packaging of the bars in bundles of weight default and ready for sale, in which the aforesaid blocks are all in line.

Production facilities of bars and/or steel profiles from liquid metal with machinery in line and/or break points of the production line are already known, according to which the bars, which may have different cross sections, are produced by lamination and then cut and packed.

An example of a plant for the production and the packaging of steel bars of the traditional type and realized by the same Applicant is shown in the block diagram of FIGS. 1 and 2 attached (FIG. 2 is a sectional view taken along the line II-II of FIG. 1), where 1 denotes a bar of indefinite length present at the beginning of the production line, number 2 indicates the rolling stage, with 3 is shown a cooling station, with 4 is shown a separation station of the scrap, with 5 is indicated with a diverter device, while with 6 is shown a cutting shear for cut the bar 1 to a fixed length Lh (equal to the maximum length commercial) or lengths equal to one or more multiples of this length Lh, and with 7 is indicated with a speed changing device (braking device), able to handle the bar portions 1a, 1b at a speed rate such that the bar portions 1a, 1b can be placed within respective grooves or housing 18 (of length L) provided on the outer surface, respectively, of each drum or rotating cylinder 8a, 8b.

Therefore, in detail, each bar 1 of indefinite length at the entrance of the line system is divided by the shear 6 in bars 1a, 1b of fixed length Lh or having a length equal to one or more multiples of the fixed length Lh, while 5 the diverter device directs the bars 1a, 1b, alternately and respectively, in the rotating cylinder 8a and 8b in the rotating cylinder and the speed changing device 7 enables to restrain the bars 1a, 1b, so that the same reach a speed able to allow them to be inserted (according to the direction of flow F) inside the respective housings 18, of fixed length L, on the lateral surface of each rotating cylinder 8a, 8b.

In particular, the fixed length L of each housing 18 of the rotating cylinders 8a, 8b is greater than or equal to the maximum commercial length or fixed length Lh of each bar 1a, 1b.

The positions of the bars 1a, 1b inside the housing 18 are the same, both for the rotating cylinder 8a and for the rotating cylinder 8b, and, therefore, in this way, the cylinder 8a download a first la bar of a first seat 19 of a cooling plate or bed 13, which has means for transporting the bars 1a, such as moving knives or blades.

Subsequently, the moving knives move the first bar of a next seat 20 of the cooling plate 13 and the rotating cylinder 8b download the bar 1b on the first seat 19 of the cooling plate 13 before that the moving knives further transfer the bar 1b on the next seat 20. The process continues in this way until the bars 1a, 1b arrive on suitable alignment rollers 9, where they are kept in place in order to be downloaded into a conveyor 14, in such a way as to form a suitable layer 15 composed of a plurality of bars 1a, 1b of length Lh. At this point, the layer 15 is moved toward the cutting shear 16, which shall, if necessary, cut the bars la, lb of fixed length Lh to a further fixed length. Thus forming a layer of bars 17 of fixed length, which is moved into the wrapping stations 10, into the binding stations 11 and into the packaging stations 12. The equipment described, as well as the production facilities of a known type, which provide packaging plant of the bars placed downstream of the rolling train, have some drawbacks, including that of not allowing a high packaging speed of the bars, not dealing with different profiles and not being substantially compact, which also makes it expensive.

As part of the above requirements, therefore, object of the present invention is to avoid the mentioned technical drawbacks and, in particular, to provide a plant for the production and packaging of bars and steel profiles, which allows to obtain a production line compact, reliable, efficient and of length substantially reduced, compared with prior art.

Another object of the invention is to provide a plant for the production and packaging of bars and steel profiles, which, compared to the prior art, it would be extremely flexible, resulting in a reduction of time and costs for implementation, and avoids any overlap of the bars on the plate or cooling bed.

A further object of the present invention is to provide a plant for the production and packaging of bars and steel profiles, which reduce both the investment and plant management costs, thereby reducing production times and increasing the packaging speed of the bars and thus the productivity.

These and other objects are achieved by providing a plant for the production and packaging of bars and steel profiles, according to the appended claim 1. Other detailed technical features are disclosed in the dependent claims.

Advantageously, the system object of the present invention is particularly compact and versatile, since it allows continuous production, treatment and packaging of bars and/or profiles of various lenghts, always maintaining an efficient production speeds, without the need to provide long waiting times in storage warehouses.

In particular, a series of rotating cylinders have respective seats formed on the lateral surface of the cylinder, adapted to house bars and/or profiles of commercial length, one after the other and at different speeds, in such a way that the arrest of the above bars in a direction perpendicular to the direction of rotation of the cylinders takes place at different times in relation to the respective cylinder, without however causing any overlapping of the bars when they are discharged onto the cooling plate.

By way of example and without limitative or exhaustive purposes, the areas of use of the fixing system of the invention are the following:

The objects and advantages mentioned above, as well as others which will emerge hereinafter, become more evident from the following description, relating to preferred embodiments of the invention, given as an example and preferred, but not limitative, and the attached drawings, in which:

FIG. 1 shows a block diagram of a plant for the production and packaging of bars and steel profiles, realized according to the prior art;

FIG. 2 is a schematic sectional view taken along the line II-II of FIG. 1;

FIG. 3 shows a block diagram of a first embodiment of a plant for the production and packaging of bars and steel profiles according to the present invention;

FIG. 4 is a schematic sectional view taken along the line IV-IV of FIG. 3;

FIG. 5 is a schematic view of the deposition process of the bars on the plate or cooling bed implemented in the system of FIG. 3, according to the present invention;

FIG. 6 shows a block diagram of a further embodiment of plant for the production and packaging of bars and steel profiles according to the present invention;

FIG. 7 is a schematic sectional view taken along the line VII-VII of FIG. 6;

FIG. 8 is a schematic view of the deposition process of the bars on the plate or cooling bed implemented in the plant according to FIG. 6, according to the present invention.

With particular reference to FIGS. 3-5 mentioned, where the same elements of FIGS. 1 and 2 are indicated using the same reference numbers, with 1 is shown a bar or profile of indefinite length, which is placed at the beginning of the line, with 2 is indicated one rolling station, with 3 is shown a cooling station, with 4 is shown a scrap separation station, with 5 is indicated a diverter device, while with 6 is shown a cutting shear for cutting bars 1 to a fixed length Lh (equal to the maximum commercial length) or lengths equal to one or more multiples of the fixed length Lh, and with 7 is indicated a speed changing device (braking device), able to move the fixed length bar portions 1a, 1b at a speed rate able to brake and arrange the bars themselves 1a, 1b within each housing 18 (of length L, with L greater than the fixed length Lh), provided on the outer surface, respectively, of each rotating drum or cylinder 8a, 8b. The housings 18 are constituted by as many grooves provided in the lateral surface of the rotating cylinders 8a, 8b, arranged horizontally and rotating about the axis of the cylinder.

The grooves of the rotating cylinders 8a, 8b placed higher receive the respective bar portions 1a, 1b from the rolling station 2, while the lower grooves unload the bar portions 1a, 1b, which had been previously received in the high position, on the cooling plate 13. Furthermore, the speed changing device 7, installed in front of each rotating cylinder 8a, 8b, keeps the bar portions 1a, 1b at a suitable speed to stop and comfortably house said bar portions 1a, 1b into housings 18 of the rotating cylinders or drums 8a, 8b, while the diverter device 5 directs the bar portions 1a, 1b towards the grooves of the rotating cylinders 8a, 8b.

Then, each bar 1 of indefinite length at the entrance of the line system is divided, b_y the cutting shear 6, in bar portions 1a, 1b of fixed length Lh, which are housed inside the housings 18 of length L (with L>Lh and L greater than the length of the commercial bars), while the diverter device 5 directs the bars 1a, 1b, alternately and respectively, in the rotating cylinder 8a in the rotating cylinder and 8b and the speed changing device 7 enables to restrain the bars 1a, 1b, so that the same reach a speed able to allow them to be inserted (in the direction of flow F) inside the respective housings 18 on the lateral surface of each rotating cylinder 8a, 8b.

The positions of the bar portions 1a, 1b inside the seats 18 are the same, both for the rotating cylinder 8a that for the rotating cylinder 8b.

In particular, it is expected that the bars 1a, 1b are arranged in the housings 18 of each rolling cylinder, respectively, 8a, 8b, always in the same positions, in such a way that, during handling the discharge of said bars 1a, 1b on the plate or cooling bed 13, the same do not overlap each other.

In detail, both the cylinder 8a that the cylinder 8b downloading each a first bar portion 1a, 1b on a first receptacle 19 of the cooling plate 13, which has means for trasporting the bar portions 1a, 1b, such as moving knives or blades.

Subsequently, the moving knives move the bar portions 1a, 1b of to a second seat 20 of the cooling plate 13 only after both the bars 1a, 1b are discharged from the respective cylinders 8a, 8b.

The process continues in this way until the bar portions 1a, 1b arrive on suitable alignment rollers 9, where they are kept in place in order to be downloaded into the wrapping station 10 and into a binding station 11 and into a packaging station 12.

In order to make better use of the capacity (limited) for housing the cooling plate 13, it is possible to use a system of production and packaging of bars and/or profiles such as that illustrated in the attached FIGS. 6-8, according to which the cutting shears 6 subdivide rods 1 of indefinite length in bar portions 1a, 1b of fixed length Lh (the length Lh is such that it is possible to accommodate 2 or more bar portions 1a, 1b within the length L, with L equal to the length of the housing 18 of each rotating cylinder 8a, 8b, and, in particular, Lh<½ L) and the diverter device 5 directs the bar portions 1a, 1b, alternately and respectively, towards the cylinder 8a and towards the cylinder 8b.

Furthermore, the speed changing device 7 installed in front of a relative rotating cylinder 8a, 8b maintains the respective bars first at a speed such that the above-mentioned first bars can be arranged in the housings 18 of the rotating cylinder 8a, while the speed changing device 7 installed in front of the rotating cylinder 8b maintains the respective bar portions 1b at a speed such that said bar portions 1b can be arranged in the housings 18 of the rotating cylinder 8b which are close to or close, but different, compared to the corresponding housings 18 of the rotating cylinder 8a, so as not to overlap the bar portions 1a, 1b onto the cooling plate 13.

Then, the positions of the bar portions 1a, 1b are always the same both inside the rotating cylinder 8a and inside the cylinder 8b (as shown in detail in the attached FIG. 8), and the rotating cylinders 8a and 8b download the bar portions 1a, 1b firstly on a first seat 19 of the cooling plate 13.

In particular, the positions of the bars 1a, 1b inside the respective cylinders 8a, 8b are such that, when said bars 1a, 1b are discharged onto the cooling plate 13, the same does not overlap each other and, specifically, it is expected that the first bars are always placed in a housing 18 of the rotating cylinders 8a, 8b, in successive positions, one row to another and not interfering with each other within said housing 18 (as shown in detail in the attached FIG. 8).

In this way, it is loaded, cyclically and alternately, firstly the entire housing 18 of a first rotating cylinder 8a and secondly another housing 18 of a second rotating cylinder 8b.

At this point and, therefore, only after that both the bar portions 1a, coming from the rotating cylinder 8a, and the bar portions 1b, coming from the rotating cylinder 8b, are placed in the seat 19 of the cooling plate 13, the moving blades of the cooling plate 13 to ensure transfer the bar portions 1a, 1b inside the seat 20, next and adjacent to the seat 19, of the cooling plate 13.

When the bar portions 1a, 1b arrive on alignment rollers 9, the same are kept in place in order to allow packaging and, in particular, the bars are first positioned on the inlet of the alignment rollers 9, while the bar portions 1b are placed at the output side of the aligment rollers 9.

In the wrapping station 10, placed in front of the binding stations 11 and packaging station 12, two bundles of bars are simultaneously formed.

From the above description, the technical characteristics of the the plant for the production and packaging of bars and steel profiles, object of the present invention, are clear, as well as the advantages are also clear.

It's, finally, that different variations may be made to the plant in question, without departing from the principles of novelty inherent in the inventive idea according to the appended claims, just as it is clear that, in the practical embodiment of the invention, the materials, shapes and dimensions of the technical details may be any according to requirements and the same may be replaced with other elements that are technically equivalent.

Claims

1. Plant for the production and packaging of steel bars or rods and profiles, including a rolling station (2) of rods and profiles (1) of indefinite length, which is placed in line with a cooling station (3) and with a scrap separation station (4), wherein, outside said separation station (4), at least one diverter device (5), at least one cutting shear (6) for cutting said bars and profiles (1) in bar portions (1a, 1b) having at least a first fixed length (LH), and at least one speed changing device (7), able to handle said bar portions (1a, 1b) at a speed rate such that said portions can be placed within respective grooves or housings (18) having a second fixed length (L), greater than said first fixed length (LH) and greater than the commercial length of the bars and provided on the outer surface of at least one cylinder or rotating drum (8a, 8b), are provided, so that the upper housings (18) of said rotating drums or cylinders (8a, 8b) receive relative bar portions (1a, 1b) from said rolling station (2), by means of said diverter device (5), while the lower housings (18) download the bar portions (1a, 1b), which have been previously received in the upper position, on at least one cooling plate (13), characterized by the fact that each rotating cylinder (8a, 8b) is associated with a speed changing device (7), so that said housings (18) receive said bar portions (1a, 1b) at different speeds, depending on the fact that said housings (18) belong to one first (8a) or to at least one second rotating cylinder (8b), and so that said bar portions (1a, 1b) have different stop positions in the relative housings (18), in a direction perpendicular to the direction of rotation of said cylinders (8a, 8b), depending on the fact that said housings (18) belong to one first (8a) or to at least one second rotating cylinder (8b), in order to avoid overlapping of said bar portions (1a, 1b) when said bar portions (1a, 1b) are downloaded on said cooling plate (13).

2. Plant as claimed in claim 1, characterized in that each speed changing device (7) is installed in front of a relative rotating cylinder (8a, 8b).

3. Plant as claimed in claim 1 characterized in that said diverter device (5) directs said bar portions (1a, 1b), respectively and alternately, into a first (8a) and into a second rotating cylinder (8b).

4. Plant as claimed in claim 1 characterized in that said bar portions (1a, 1b) have the same positions within said housings (18), both for said first rotating cylinder (8a) and for said second rotating cylinder (8b), so that said bar portions (1a, 1b) are arranged within said housings (18) always in the same positions.

5. Plant as claimed in claim 1 characterized in that said cooling plate or bed (13) has means for transporting said bar portions (1a, 1b), such as moving knives or blades, from a first seat (19) to a second seat (20), adjacent to said first seat (19), of the cooling plate (13).

6. Plant as claimed in claim 1 characterized in that said transporting means move said bar portions (1a, 1b) from said first seat (19) to said second seat (20) of the cooling plate (13) only after the discharge of at least one bar portion (1a, 1b) from each rotating cylinder (8a, 8b).

7. Plant as claimed in claim 1 characterized in that said bar portions (1a, 1b), which are downloaded from said rotating cylinders (8a, 8b) and which are moved on said cooling plate (13), reach suitable alignment rollers (9), where said bar portions (1a, 1b) are kept in place in order to be downloaded into a wrapping station (10) and into a binding station (11) and into a packaging station (12).

8. Plant as claimed in claim 1 characterized in that said first fixed length (Lh) is such that it is possible to house at least two bar portions (1a, 1b) within said second fixed length (L) and said second fixed length (L) is equal to the length of said housings (18) provided on each rotating cylinder (8a, 8b).

9. Plant as claimed in claim 1 characterized in that said first fixed length (Lh) is less than half of said second fixed length (L).

10. Plant as claimed in claim 1, characterized in that at least one of said speed changing devices (7) keeps the relative bar portions (1b) at a rate such that said relative bar portions (1b) are housed in the housings (18) of at least one first rotating cylinder (8b) that are near or close to, but different than, the housings (18) of at least one second rotating cylinder (8th), so as not to overlap said bar portions (1a, 1b) onto the cooling plate (13).

11. Plant as claimed in claim 1, characterized in that said first bar portions (1a) and said second bar portions (1b) are housed within the same housing (18) of said rotating cylinder (8a, 8b).

12. Plant as claimed in claim 1, characterized in that a first housing (18) of a first rotating cylinder (8a) and, later, a second housing (18) of a second rotating cylinder (8b) are loaded cyclically and alternately.

13. Plant as claimed in claim 1, characterized in that some bar portions (1a) are positioned at the inlet side of said alignment rollers (9), while other bar portions (1b) are placed at the output side of said alignment rollers (9), so that at least two bundles of bars are simultaneously formed in the wrapping station (10).