ITVI20120040A1 - SYSTEM FOR RECEIPT AND CONVEYANCE OF BARS COMING FROM A MILL AND RELATIVE PLANT FOR THE PRODUCTION AND PACKAGING OF BARS AND STEEL PROFILES - Google Patents

Description

SYSTEM FOR RECEIVING AND CONVEYING BARS COMING FROM A MILL AND RELATIVE PLANT FOR THE PRODUCTION AND PACKAGING OF BARS AND PROFILES IN

STEEL

The present invention is part of the field of plants for the production and packaging of steel bars and profiles and, more particularly, it refers to a system for receiving and conveying bars coming from a rolling mill, and to a relative plant for lamination equipped with such a system.

In detail, the invention relates to a system of the above type, comprising a rotating drawer for receiving and unloading the bars coming from the rolling mill.

Systems are still known to receive and unload the bars (already cut to size) on the cooling bed, such as single or double channels or rotating drums, for example by means of rollers equipped with elevator sliders, or by means of rollers equipped with vanes, or inclined chutes, etc.

All the so far known rotating devices, such as for example the one shown in Figure 1, receive the bars on the same seats as the rotating drums; therefore, the rotation of the device and the consequent unloading of the bars cannot start until the bar has entered the drum for its entire length. This limitation sets time limits to accommodate the bars in the seats and unload them on the cooling bed, reducing the packaging speed of the bars.

An attempt has been made to obviate this drawback with further rotating deviating devices, which guide the bar entering the seat of the rotating drum so as to follow its position during its rotation.

However, this solution involves the use of additional complex and expensive devices, with the further burden of being unreliable, as it involves the deviation of the material from its original direction, with the risk of damaging the bars, for example by bending them. , or to generate substandard loans.

Furthermore, the presence of these deviators does not allow positioning the necessary bar-braking or speed variation devices near the rotating drum; however, this leads to the disadvantage of an excessively long processing time, in fact it generates an increase in the space that the bar has to travel between a bar-braking device and an unloading drum, thus also increasing the size and cost of the system.

In the context of the above-mentioned requirements, therefore, the purpose of the present invention is to obviate the technical drawbacks complained of and, in particular, to provide a system for receiving and conveying bars from a rolling mill, which allows to obtain a compact, reliable and efficient production line compared to the known art.

Another purpose of the invention is to realize a system for receiving and conveying bars coming from a rolling mill, which, compared to the known technique, is extremely flexible, resulting in a reduction in implementation times and costs, as well as allowing avoid any jamming of the bars during their transfer on the cooling plate or bed.

A further purpose of the present invention is that of realizing a system for receiving and conveying bars coming from a rolling mill, which allows to reduce both the investment costs and those of management of the plant, also reducing production times and increasing the packaging speed of the bars and therefore productivity. These and other purposes are achieved by realizing a system for receiving and conveying bars coming from a rolling mill, according to the attached claim 1, and a plant for the production and packaging of steel bars and profiles, according to the attached claim 9, which please refer for the sake of brevity.

Other technical details and / or construction features of the system and of the relative plant are also reported in the additional dependent claims.

Advantageously, the system object of the present invention is particularly compact and versatile, as it allows the continuous production, treatment and packaging of bars and / or profiles of various sections, always maintaining an efficient production speed, without the need to provide for long waiting times before the bars are transferred to the cooling beds. In particular, the system of the invention comprises at least one rotating drawer equipped with at least one respective groove or seat of the housing, a containment profile for each rotating drawer; the upper housing pockets of the rotating drawers are designed to receive the respective bars from the rolling mill, while the lower housing pockets are designed to unload the bars, previously received in the upper position, onto at least one cooling plate; each containment profile for each cassettorotante provides a guide channel, having suitable guide pockets, to guide the bars in their path from the rolling mill to the cassettorotante.

In other words, the system object of the invention is a system for receiving and conveying bars coming from a rolling mill, comprising at least one rotating drawer and a guide channel, suitable for receiving and guiding the bars coming from the rolling mill which slide between the external surface of the drawer and the guide channel. These bars are received in the suitably shaped pockets of the drawers by rotation of the same and subsequently conveyed again by rotation of the drawers by said pockets and by a containment profile to be unloaded on a cooling plate or other means that transports the bars in an orthogonal direction. to the rolling axis.

Preferably, the system of the invention provides that a speed variator device is associated with each rotating drawer, so that the housing pockets receive the bars at different speeds, depending on whether the pockets belong to a first or at least a second rotating drawer, and so that the bars assume different stopping positions in the respective pockets, in a direction perpendicular to the rotation direction of the drawers, depending on whether the pockets belong to a first or at least a second rotating drawer, in order to avoid overlapping of the bars when the bars are discharged on the cooling plate.

Furthermore, the system for receiving and conveying according to the invention provides that each speed variator is installed in front of a respective rotating drawer.

Always according to the invention, the positions of the bars inside the housing pockets are the same, both for the first rotating drawer and for the second rotating drawer, so that the bars are always arranged inside the pockets in the same positions.

Furthermore, according to the invention, the cooling plate or bed has means for transporting the bars, such as movable knives or blades, from its first seat to a second seat, adjacent to the first seat of the cooling plate.

Furthermore, according to the invention, the transport means transfer the bars from the first seat to the second seat of the cooling plate only following the discharge of at least one bar from each rotating drawer.

Preferably, at least one of the speed variator devices keeps the respective bars at a speed such that the respective bars are housed in the pockets of at least a first rotating drawer which are close to or close to, but different from the pockets of at least a second rotating drawer. , so as not to overlap the bars on the cooling plate.

Furthermore, according to the invention, a first housing seat of a first rotating drawer and, subsequently, a second housing seat of a second rotating drawer are loaded, in a cyclical and alternating manner.

Advantageously, according to the invention, the receiving and conveying system can be applied to a bar production and packaging plant. The aforementioned purposes and advantages, as well as others that will emerge in the following, will appear more evident from the following description, relating to preferred embodiments of the invention, provided by way of example and preferred, but not limitative, and from the attached drawings, in which:

Figure 1 shows a schematic section of a system according to the known art;

- figure 2 shows a schematic section of the system of the invention, in a first embodiment thereof;

Figure 3 shows in A, B, C, D, E the respective operating phases of the system of Figure 1;

- figure 4A is a schematic section made along the line A-A of figure 3A;

- figure 4B is a schematic section made along the line B-B of figure 3A;

- figure 5A is a schematic section made along the line A-A of figure 3B;

- figure 5B is a schematic section made along the line B-B of figure 3B;

- figure 6A is a schematic section made along the line A-A of figure 3C;

- figure 6B is a schematic section made along the line B-B of figure 3C;

- figure 7A is a schematic section made along the line A-A of figure 3C, in a subsequent step with respect to that shown in figure 6A;

- figure 7B is a schematic section made along the line B-B of figure 3C, in a subsequent step with respect to that shown in figure 6B;

- figure 5a is a schematic section made along the line A-A of figure 3D;

- figure 5b is a schematic section made along the line B-B of figure 3D;

figure 9 shows in A, B, C, D, E the respective operating phases of the system of figure 1 subsequent to the phases of figure 3;

- figure 10 shows in A, B, C, D, E the respective operating phases of the system of figure 1 subsequent to the phases of figure 9.

With particular reference to the aforementioned figures 2-8, 1 indicates the bars or profiles of indefinite length, present at the end of the production line, arriving at the system of the invention to be deposited on the cooling bed 2.

In particular, the system comprises two channels 3, having a substantially semicircular profile 4, equipped inside them with a rotating drawer 5 and, along their profile 4 each have a guide channel or lateral recess 6, having suitable guide seats, to guide the bar 1 in its path from the rolling mill to the rotating cylinder 5.

In the embodiment of the invention, shown in the figures, the rotating drawer 5 has in particular a cylindrical shape and four housings or seats or pockets 7, suitably shaped to accommodate the laminate or bar 1 during the rotation of the rotating drawer 5 itself, but this does not mean that this shape and the number of pockets may vary according to the processing needs of the system to which the system is to be applied.

The operation of the system of the invention is as follows.

The bars 1 are cut to size and sorted alternately on two parallel paths, arriving at the entrance of the two channels 3.

The bars 1 are inserted into the side recesses 6, and subsequently each of the rotating cylinders 5a and 5b alternately receives the bars 1a and 1b by rotation and discharges them into the cooling bed 2. More specifically, each side recess 6a and 6b acts as a channel guide, to guide the bars 1a and 1b during their entry into the channel 3, while the remaining profile 4 acts as a containment wall, to keep the bars 1a and 1b in the seat 7 of the rotating cylinder 5, until the seat 7 is is located in correspondence with the opening 8 of the profile 4, which in turn corresponds to the direction of conveyance of the bars 1a and 1b towards the cooling bed 2. Furthermore, the rotating drawer 5 is able to receive the bars 1a and 1b at the Inside the seats 7, by means of a simple rotation, when the bars 1a and 1b slide between the external surface 9 of the drawer and the channel 6 present on the profile 4.

The seats 7 consist of the same number of grooves provided in the external surface 9 of the rotating cylinders 5, arranged longitudinally and rotating around the axis of the cylinder 5.

The grooves or seats 7 of the rotating cylinders 5 placed higher up receive the respective bars 1a, 1b from the rolling mill 2, while the grooves placed further down unload the bars 1a, 1b, which had previously been received in the upper position, on the plate or cooling bed 2.

Therefore, each bar 1 leaving the rolling mill is housed inside the housings or seats 7 of the rotating cylinder 5a and in the rotating cylinder 5b and the speed variator 11 (figures 4-8) allows the bars 1a, 1b to be braked , so that they reach such a speed that they can be inserted (according to the flow direction F) inside the respective seats 7 present on the lateral surface of each rotating cylinder 5a, 5b.

The positions of the bars 1a, 1b inside the seats 7 are the same, both for the rotating cylinder 5a and for the rotating cylinder 5b.

In particular, it is envisaged that the bars 1a, 1b are arranged in the seats 7 of each rotating cylinder, respectively, 5a, 5b, always in the same positions, so that, during the unloading movement of the aforementioned bars 1a, 1b on the plate or cooling bed 2, they do not overlap each other.

In detail, both the rotating cylinder 5a and the rotating cylinder 5b each discharge a first bar 1a, 1b onto a first housing seat 12 of the cooling plate or bed 2, which has means for transporting the bars 1a, 1b, such as knives. or movable blades (not shown).

Subsequently, the movable knives transfer the bars 1a, 1b onto a subsequent housing seat 13 of the bed or cooling plate 2 only after both bars 1a, 1b are discharged from the respective cylinders 5a, 5b.

The process continues in this mode until the bars 1a, 1b arrive on special alignment rollers (not shown), where they are held in position in order to be unloaded in the packaging station and from here to the binding and packaging stations (not shown).

With reference to Figures 4-8, the speed variator 11 is placed in front of the rotating cylinder 5a and keeps the respective bars 1a at a speed such that the aforementioned bars 1a can be housed in the seats 7 of the rotating cylinder 5a, while the speed variator 11 placed in front of the rotating cylinder 5b maintains the respective bars 1b at a speed such that the aforementioned bars 1b can be housed in the seats 7 of the rotating cylinder 5b which are close to or close to, but different, with respect to the corresponding seats 7 of the rotating cylinder 5a, so as not to overlap the bars 1a and 1b on the cooling plate 2.

Therefore, the positions of the bars 1a, 1b are always the same, both inside the rotating cylinder 5a and inside the rotating cylinder 5b, and the rotating cylinders 5a and 5b unload the bars 1a, 1b first on a first seat 12 of the cooling plate 2.

In particular, the positions of the bars 1a, 1b inside the respective cylinders 5a, 5b are such that, when the aforementioned bars 1a, 1b are discharged onto the cooling plate 2, they do not overlap each other and, specifically , it is envisaged that the bars 1a are always placed in a seat 7 of the cylinders 5a, 5b, in successive positions, one consecutive to the other and not interfering with each other inside the aforementioned seat 7.

In this way, first the seat 7 of a first rotating cylinder 5a and then another seat 7 of a second rotating cylinder 5b are loaded in a cyclical and alternating manner.

At this point and, therefore, only after both the bars 1a, coming from the rotating cylinder 5a, and the bars 1b, coming from the rotating cylinder 5b, are placed in the seat 12 of the cooling plate 2, the movable blades of the cooling plate 2 transfer the bars 1a, 1b inside the seat 13, next to and adjacent to the seat 12, of the cooling plate 2.

With particular reference to figures 3-10, thanks to the particular conformation of the seats 7 of the rotating cylinders 5, the movements of the bars occur according to the following sequence:

Figures 3A, 4A and 4B: the head of the bar 1b enters the conveyance between the external surface 8 of the rotating cylinder 5b and the guide channel 6 present on the profile 4.

Figures 3B, 5A and 5B: the rotating cylinder 5b rotates by placing the bar 1b in the seat 7 while the bar 1b continues its stroke.

Figures 3C, 6A, 6B and 7A and 7B: the tail of the bar 1b enters the seat 7 of the rotating cylinder 5b; at the same time the head of the bar 1a enters the conveyance between the external surface of the rotating cylinder 5a and the guide channel 6 present on the profile 4. The bar 1b stops on the bottom of the seat 7, in any section between the initial and final length of the rotating cylinder 5 (figure 7). When the head of the bar 1b has entered, the rotating cylinder 5a rotates, placing the bar 1a in the seat 7 while the bar 1b continues its stroke

Figures 3D, 5a and 5b: the rotating cylinder 5b can complete the rotation, freeing the external channel 6b of profile 4, which is ready to receive a new bar. The rotating cylinder 5a continues the rotation by placing the bar 1a in the seat 7 while the bar 1b continues its stroke.

Figure 3E: the tail of the bar 1a enters the seat 7 of the rotating cylinder 5a, at the same time the head of the bar 2b enters the rotating cylinder 5b.

Figures 9A-9E: the cycle is repeated until all the seats 7 present on the rotating cylinders 5 are filled.

Figure 10A: the cylinder 5b rotates by placing the bar 1b which is entering the seat 7 and unloading the first bar 1b in the seat 12 of the cooling bed 2. Figures 10B-10D: the bar 1a enters the conveyance between the external surface of the rotating cylinder 5a and the guide channel 6 present on the profile 4, the cylinder 5a rotates unloading the bar 1a in the seat 12 of the cooling bed 2.

Figure 10E: the movable knives transfer the bars 1 to a subsequent housing 13 for housing the cooling bed 2.

From the above description the technical characteristics of the system for receiving and conveying bars coming from a rolling mill, which is the object of the present invention, are clear, as well as the advantages.

Finally, it is clear that numerous other variations can be made to the system in question, without departing from the principles of innovation inherent in the inventive idea, just as it is clear that, in the practical implementation of the invention, the materials, shapes and dimensions of the illustrated details may be any according to requirements, and may be replaced with other technically equivalent ones.

Claims (9)

CLAIMS 1. System for receiving and conveying bars (1a, 1b) coming from a rolling mill, comprising at least one rotating tray (5a, 5b) equipped with at least one respective groove or pocket (7), a containment profile (4) for each of said at least one rotating drawer (5a, 5b), said at least one pocket (7) of the rotating drawer (5a, 5b) being able to pass from a high position to a low position during the rotation of the rotating drawer (5a, 5b ), the pocket (7), when in the high position, being able to receive the respective bars (1a, 1b) from said rolling mill while, when in the low position, being able to unload the bars (1a, 1b), previously received in the high position, on at least one cooling plate (2), characterized in that each containment profile (4) for each of said at least one rotating drawer (5a, 5b) provides a guide channel (6a, 6b), having suitable guide seats, to guide the bars (1a, 1b) in their path from the lamin atrium to the rotating drawer (5a, 5b). 2. Receiving and conveying system according to claim 1, characterized in that a speed variator device (11) is associated with each rotating drawer (5a, 5b), so that said pockets (7) can receive said bars (1a, 1b) at different speeds, depending on whether said pockets (7) belong to a first rotating drawer (5a) or to at least a second rotating drawer (5b), and in such a way that said bars (1a, 1b) can assume different stopping positions in the respective pockets (7), in a direction perpendicular to the direction of rotation of said rotating drawers (5a, 5b), depending on whether said pockets (7) belong to a first (5a) or to at least a second drawer rotating (5b), in order to avoid overlapping of said bars (1a, 1b) when said bars (1a, 1b) are discharged onto said cooling plate (2). 3. Receiving and conveying system according to claim 2, characterized in that each speed variator (11) is installed in front of a respective rotating drawer (5a, 5b). 4. System for receiving and conveying according to one of claims 2 or 3, characterized in that the positions of said bars (1a, 1b) inside said pockets (7) are the same, both for said first rotating drawer (5a) and for said second rotating drawer (5b), so that said bars (1a, 1b) are arranged inside said pockets (7) always in the same positions. 5. Receiving and conveying system according to one of the preceding claims, characterized in that said cooling plate (2) has means for transporting said bars (1a, 1b), such as movable knives or blades, from a first seat ( 12) to a second seat (13), adjacent to said first seat (12), of the cooling plate (2). 6. Receiving and conveying system according to one of the preceding claims, characterized in that said transport means transfer said bars (1a, 1b) from said first seat (12) to said second seat (13) of the cooling plate (2 ) only following the discharge of at least one bar (1a, 1b) from each rotating drawer (5a, 5b). 7. Receiving and conveying system according to one of the preceding claims, characterized in that at least one of said speed variator devices (11) maintains the respective bars (1b) at such a speed that said respective bars (1b) are housed in the pockets (7) of at least a first rotating drawer (5b) which are close or close to, but different, with respect to the pockets (7) of at least a second rotating drawer (5a), so as not to create overlapping of said bars (1a , 1b) on the cooling plate (2). 8. Receiving and conveying system according to one of the preceding claims, characterized in that a first pocket (7) of a first rotating drawer (5a) and, subsequently, a second pocket ( 7) of a second rotating drawer (5b). 9. Plant for producing and packaging bars (1a, 1b), comprising a system for receiving and conveying according to one of the preceding claims.