BR112014016578B1 - CONTINUOUS INDUSTRIAL EQUIPMENT WITH AN INPUT SECTION AND PROCESS TO UNIT, CENTRALIZE AND MEND BY TWO BANDS IN ONE INPUT SECTION OF A CONTINUOUS INDUSTRIAL EQUIPMENT - Google Patents

Abstract

abstract “continuous industrial equipment with an inlet section and process for joining, centering and welding together two strips in an inlet section of a continuous industrial equipment” The present invention relates to a continuous industrial equipment with an inlet section comprising two unwinding devices (1a, 1b) for uncoiling and feeding materials into strips to be transformed, a cutting device (2a, 2b) and a transfer table (3a, 3b) for each strip and a joining device (4), so that the transfer tables (3a, 3b) transport said bands to the joining device (4), wherein a coiled tail band and a coiled front band are connected at least a winding table (5) for centering the bands and a welding equipment (6) wherein said coil tail band and said coil front band are welded together. each of the transfer tables (3a, 3b) is also a winding table (5), in which the windings for centralizing the bands can be made directly on said transfer tables (3a, 3b) and provided in such a way that the bands joined in the joining device (4) are directly fed to the welding equipment (6) without further winding. 1/1

Description

Domain of the Invention

The object of the present invention is the domain of continuous processes in the steel industry, which lead to improvements in productivity and yield, as well as cost savings. These continuous processes are, for example, those that take place on pickling lines, eventually connected to cold rolling mills or carried out on continuous rolling mills.

Prior art

A known technical problem, in the lines mentioned above, is that of the entrance section, in which two bands are welded and which constitute one of the main bottlenecks of these processes. The temporal performance of this entry into the line is therefore critical to achieving annual production. This is even more true when the coils deliver bands of short lengths.

The welding process needs to create a loop at the front of the welding equipment. There are solutions such as the preload table in continuous annealing lines (LCR) or continuous galvanizing lines (LCG), which are not applicable for the treatment of hot rolled strips. According to the high thickness and the high weight of the ring, these hot rolled strips require a different design of the inlet, to allow the safe creation of the loop and its safe centering.

A typical scheme of this entry section is shown in FIG. 1.

The entry time cycle represents the time during which the rear end of a coil and the front end of the next coil are being operated at a lower speed than the stripping or winding process.

1. - abaixamento da velocidade do processo para uma velocidade de enfileiramento;
2. - transferência da primeira extremidade posterior da bobina a partir da primeira bobina desenrolada la para a primeira guilhotina de divisão 2a;
3. - corte na primeira guilhotina 2a;
4. - transferência da primeira extremidade posterior da bobina para um rolo comum de prensagem 4, graças à primeira mesa de transferência 3a;
5. - transferência da primeira extremidade posterior da bobina do rolo comum de prensagem 4 para o equipamento de soldadura 6.

The entry cycle typically comprises the following steps:

1. - lowering the process speed to a queuing speed;
2. - transferring the first rear end of the spool from the first spool unwound there to the first division guillotine 2a;
3. - cut in the first guillotine 2a;
4. - transfer of the first rear end of the bobbin to a common press roller 4, thanks to the first transfer table 3a;
5. - transfer of the first rear end of the coil from the common pressing roller 4 to the welding equipment 6.

1. - transferência da extremidade da frente da segunda bobina (bobina seguinte) da segunda bobina de desenrolamento lb para a segunda guilhotina de divisão 2b;
2. - corte na segunda guilhotina 2b;
3. - transferência da segunda extremidade da frente da bobina a partir do rolo comum de prensagem 4 para o equipamento de soldadura 6 e criação de uma espira na mesa de espiralagem 5,sendo esta espira necessária para centralizar a bobina no equipamento de soldadura;
4. - soldadura das duas extremidades da bobina;
5. - nova aceleração para a velocidade máxima de entrada.

In parallel with these first steps, the following steps are performed, so that the rear end of the first coil and the front end of the second coil can be joined by welding, without wasting time:

1. - transferring the front end of the second coil (next coil) from the second unwinding coil lb to the second split guillotine 2b;
2. - cut in the second guillotine 2b;
3. - transferring the second front end of the coil from the common pressing roller 4 to the welding equipment 6 and creating a loop in the spiral table 5, this loop being necessary to center the coil in the welding equipment;
4. - welding of the two ends of the coil;
5. - new acceleration to the maximum entry speed.

During these operations, the pickling intermediate section or the winding process section is still operating at the rated speed, thanks to the storage capacity of the accumulators.

Therefore, if the entry cycle time is reduced then this allows the blasting section to function more quickly for the same capacity as the winding equipment.

Objects of the present invention

The purpose of the present invention is to shorten the cycle time of entry into continuous lines in the steel industry, thereby reducing the production time of the lines mentioned above.

Another object of the present invention is to simplify the entry section of an LL / LFT.

Yet another object of the present invention is to eliminate or reduce the transfer time from a common pull roller to the welding equipment.

Yet another objective is to allow better loop creation and better centering for heavy band calibrators.

Summary of the invention

A first object of the present invention consists of continuous industrial equipment with an entrance section comprising two devices for unwinding and feeding web materials to be treated, a cutting device and a transfer table for each band and a joining device, so that the same transfer tables provide said bands to the connection device, in which a band of the rolled-up back and a band of the rolled-up front come together, at least one winding table to center the bands and a welding equipment , in which said curled tail bands and said curled head bands are joined by welds, characterized by the fact that each transfer table is also a winding table, in which the turns to center the bands can be made directly transfer tables and characterized by the fact that the bands united in the junction device will feed the welding device directly, without further winding (claim 1).

1. - as mesas de transferência consistem numa mesa superior que define um nível de entrada superior, que se sobrepõe a uma mesa inferior que define um nível de entrada inferior, sendo o equipamento fornecido com meios para exceutar superior;
2. - cada dispositivo de desenrolamento compreende uma desbobinadora ;
3. - cada dispositivo de corte compreende uma guilhotina;
4. - o dispositivo para a união compreende um rolo puxador comum;
5. - os referidos meios para, primeiro fazer a retracção e depois a subida para a mesa superior compreendem pelo menos um cilindro hidráulico ou pneumático para fazer a retracção da mesa superior e pelo menos um cilindro hidráulico ou pneumático para elevar a mesa superior, estando os referidos cilindros localizados próximo do dispositivo de junção;
6. - os cilindros, hidráulicos ou pneumáticos, são parcialmente ou totalmente substituídos por parafusos, actuados por motores eléctricos ou hidráulicos;
7. - o equipamento compreende meios de detecção sem contato para o controlo da altura da espira na mesa inferior e para prevenir a colisão da referido espira com a mesa superior;
8. - os meios de detecção sem contato significam uma barreira de luz;
9. - o equipamento compreende uma roda giratória, para centralizar as bandas, capaz de se mover em direcção à banda por meio de um cilindro hidráulico ou pneumático.

According to the embodiments of the examples of the present invention, possibly preferred embodiments, continuous industrial equipment, with an inlet section, is further limited according to one or an appropriate combination of the following characteristics (claims 2 to 10) :

1. - transfer tables consist of an upper table that defines an upper entry level, which overlaps with a lower table that defines a lower entry level, the equipment being provided with means for exceeding higher;
2. - each unwinding device comprises an unwinder;
3. - each cutting device comprises a guillotine;
4. - the joining device comprises a common puller roller;
5. - said means for first retracting and then ascending to the upper table comprise at least one hydraulic or pneumatic cylinder to retract the upper table and at least one hydraulic or pneumatic cylinder to raise the upper table, said being cylinders located near the coupling device;
6. - cylinders, hydraulic or pneumatic, are partially or totally replaced by screws, driven by electric or hydraulic motors;
7. - the equipment comprises non-contact detection means for controlling the height of the turn on the lower table and to prevent the collision of said turn with the upper table;
8. - the non-contact detection means a light barrier;
9. - the equipment comprises a rotating wheel, to center the bands, capable of moving towards the band by means of a hydraulic or pneumatic cylinder.

1. - uma bobina em circulação N que é transformada através do nível de entrada inferior;
2. - uma bobina N+l, que se segue, é enfileirada, preparada e recortada ao nível da entrada superior, sendo a sua extremidade da ferente colocada em frente a um rolo puxador comum, numa posição de espera;
3. - a extremidade posterior da bobina N abandona sucessivamente o mandril da desbobinadora, o nível de entrada inferior e o rolo comum de prensagem, sendo criada uma espira no lado da saída do equipamento de soldadura para centralizar a extremidade posterior;
4. - imediatamente após a libertação do rolo puxador comum, a extremidade da frente da bobina N+l ao nível superior é enfileirada pelo rolo puxador comum para o lado da entrada do equipamento de soldadura;
5. - de acordo com as diferenças de velocidade entre o nível de entrada superior e o rolo puxador comum, cria-se uma espira na mesa de transferência superior;
6. - após a criação da espira, o rolo do topo, do rolo puxador comum, retrai-se para permitir o movimento da banda durante o processo de centragem;
7. - a extremidade posterior da bobina N e a extremidade da frente da bobina N+l são emendadas, por soldadura, no
8. - a nova banda N+l é então alimentada para a linha por via equipamento de soldadura; do nível de entrada superior;
9. - uma segunda banda N+2 é enfileirada, preparada e cortada, ao nível de entrada inferior, sendo a extremidade da frente colocada em frente do rolo puxador comum, numa posição de espera;
10. - a extremidade posterior da bobina N+l abandona sucessivamente o mandril da desbobinadora, o nível de entrada superior e o rolo puxador comum, sendo criada uma espira no lado da saída do equipamento de soldadura para centralizar a extremidade posterior;
11. - imediatamente após esta operação, liberta-se o rolo puxador comum, enfileira-se a extremidade da frente da bobina N+2, ao nível inferior, por meio do rolo puxador comum, em direcção ao lado de entrada do equipamento de soldadura;
12. - para permitir a formação de uma espira alta, para realizar uma função de centragem segura, retrai-se a mesa de transferência do topo e sobe-se por meio de cilindros hidráulico ou pneumático e/ou por actuação de parafusos;
13. - de acordo com as diferenças de velocidade, entre o nível de entrada e o rolo puxador comum, vai-se criar uma espira, na mesa de transferência do fundo;
14. - após a criação da espira, o rolo do topo do rolo puxador comum retrai-se para permitir o movimento da banda durante o processo de centragem;
15. - a extremidade posterior da bobina N+l e a extremidade da frente da bobina N+2 são unidas por soldadura, no equipamento
16. - a nova banda N+2 vai então alimentada a linha por via do de soldadura; nível de entrada do fundo.

A second object of the present invention consists of a process for joining, centering and welding two bands, in an entrance section of a continuous industrial equipment, comprising all the characteristics of claims 1 to 7, characterized by at least one of the following steps (claim 11):

1. - a circulating coil N which is transformed through the lower input level;
2. - an N + 1 coil, which follows, is lined up, prepared and cut at the level of the upper entrance, with its end of the ferent placed in front of a common pull roller, in a waiting position;
3. - the rear end of coil N successively leaves the unwinder mandrel, the lower entry level and the common pressing roller, creating a loop on the outlet side of the welding equipment to center the rear end;
4. - immediately after the release of the common pull roller, the front end of the N + 1 coil at the top level is lined up by the common pull roller towards the entrance side of the welding equipment;
5. - according to the speed differences between the upper entry level and the common pull roller, a loop is created on the upper transfer table;
6. - after the creation of the loop, the top roller, of the common puller roller, retracts to allow the movement of the band during the centering process;
7. - the rear end of coil N and the front end of coil N + l are seamed by welding on the
8. - the new band N + l is then fed to the line via welding equipment; the upper entry level;
9. - a second N + 2 band is lined up, prepared and cut, at the lower entry level, the front end being placed in front of the common puller roller, in a waiting position;
10. - the rear end of the N + 1 coil successively leaves the unwinder mandrel, the upper entry level and the common pull roller, creating a loop on the outlet side of the welding equipment to center the rear end;
11. - immediately after this operation, the common pull roller is released, the front end of the N + 2 coil is lined up, at the lower level, by means of the common pull roller, towards the entrance side of the welding equipment;
12. - to allow the formation of a high loop, to perform a safe centering function, the transfer table from the top is retracted and raised by means of hydraulic or pneumatic cylinders and / or by actuation of screws;
13. - according to the speed differences, between the entry level and the common puller roller, a loop will be created on the bottom transfer table;
14. - after creating the loop, the top roller of the common puller roll retracts to allow the movement of the web during the centering process;
15. - the rear end of the N + coil and the front end of the N + 2 coil are joined by welding on the equipment
16. - the new band N + 2 is then fed to the line via the welding; bottom entry level.

Brief description of the drawings

FIG. 1 represents a typical configuration of an entrance section, according to the prior art, since it concerns a hot rolled material;

FIG. 2 represents a detailed view of the configuration of FIG. 1;

FIG. 3 represents a preferred embodiment of the configuration of an inlet section according to the present invention.

Detailed description of the invention and preferred embodiments

In order to reduce the input cycle, as described above, a new concept of the turn table has been developed in accordance with the present invention. The project, with two transfer tables 3a, 3b (one for each passing line), a puller roller 4 and a table for the formation of turns 5 (as in FIG. 2) is replaced by a project with only two tables transfer lines 3a, 3b including the looping function 5 and a common pull roller 4. Accordingly, the loops to center the band are made directly on the transfer tables. In FIG. 3 presents the new solution schematically. The scope of the present invention concerns an installation comprising any suitable welding equipment 6. It should be noted that the welding equipment illustrated in FIG. 3 is an example of commercially available welding equipment.

In accordance with a preferred embodiment of the present invention and to provide sufficient space to create a loop in the underpass line, the upper spiraling table is retractable and can be raised. When it is necessary to form a loop in the underpass line, the upper table, preferably, is first retracted by means of a hydraulic or pneumatic cylinder and then it is raised by two hydraulic or pneumatic cylinders located near the puller roller.

The lower loop can thus be formed when the upper table is raised.

Next, the process for joining, centering and splicing two ends of band is indicated in more detail.

A circulation coil N (N integer> 0) is transformed through the bottom or the lower entry level, comprising the lower table. The next coil, N + 1, is lined up, prepared and cut in the guillotine at the level of the upper or top entrance, comprising the upper table. The new front end of the N + 1 coil is placed in front of the common puller roller, in a waiting position. The rear end of coil N successively leaves the mandrel of the unwinding coil, creating a loop on the outlet side of the welding equipment, by means of two pullers (not shown) to center the rear end.

As a new feature of the present invention, the upper queuing table combines three functions. The first is to store the front end of the next coil N + 1, already close to the common pulling roller of the welding equipment. The second function is to create a loop on this table. The third function consists of allowing bands to be lined up, from the N + 2 band to the common puller roller, during the formation of the loop and the welding of the N + 1 band in the shading time of the welding process.

Immediately after releasing the common pull roller, the new front end of the N + 1 coil, at the level of the upper inlet, is lined up by the common pull roller to the side towards the entrance of the welding equipment. According to the speed difference between the upper entry level and the common pull roller, a loop is created on the top transfer table. After the creation of the loop, the top roller, of the common pull roller, retracts by means of the punch cylinders (not shown), to allow the movement of the band during the centering process.

For further improvements to the centering process and to avoid blocking the band (especially for thick and hard materials) against the upper normal puller roller, a special centering rotating wheel 7 moves towards the band, using a hydraulic or pneumatic cylinder. This allows a better movement of the loop during the centering process, with the integrated centering device of the welding equipment. With this equipment, the precision of the centering of the welding joints can be improved to reduce other problems during the displacement of the band, the lateral cut and the cold winding. After centering, the centering revolving wheel 7 will be retracted to allow the band to be transported during the next welding and incision accelerations.

The rear end of the N band and the front end of the N + 1 band are then spliced by welding on the welding equipment.

The new N + 1 band will then feed the line via the upper entry level. The next band, N + 2, is routed, prepared and cut in the guillotine at the level of the lower entrance. The new front end of the N + 2 band is placed in front of the common puller roller, in a waiting position. The rear end of the N + l band successively leaves the unwinding coil mandrel, the upper entry level and the common pull roller, creating a loop on the outlet side of the welding equipment by means of two coil rolls ( not shown) to center the rear edge. Immediately after releasing the common puller roller, the new front end of the N + 2 band, at the lower level, is routed, through the common puller roller, to the side of the welding equipment inlet. Thus, it is necessary to allow the creation of a high ring to perform a safe centering function. For this reason, the top transfer table is retractable and can be lifted thanks to hydraulic or pneumatic cylinders. In order to prevent the collision of the turns with the upper rowing table, the height of the loop will be controlled, preferably by means of a light barrier. Depending on the speed differences between the entry level and the common pull roller, a loop is created on the bottom transfer table at the bottom. After the creation of the loop, the top roller, of the common puller roller, retracts along the punch cylinders, to allow a movement of the band during the centering process. The considerations of § [0027] are also applicable here.

The rear end of the N + 1 band and the front end of the N + 2 band are then welded to the welding equipment. The new N + 2 band will then feed the line, via the lower entry level.

The successive new bands are being transformed, alternately, in the entrance, lower and upper sections, creating successive turns, alternately, in the entrance, lower and upper tables.

Unlike other strip transformation lines, such as CAL and CGL, the line, according to the present invention, can also transform thick, hot-rolled bands.

Thanks to this new concept, the winding table, according to the previous technique, can be eliminated and, therefore, the transfer time of the band, from the common pull roller to the welding equipment, is also eliminated. Depending on the thickness of the band, the time gain is normally 5 to 7 seconds for each period of the input cycle. As an example, this new entry concept thus allows a reduction of production time by approximately 2% (meaning an increase in productivity) for an LL / LFT of 2 million tons of capacity, depending, however, on the incoming bands and line configuration.

1. 1a. Bobina de desenrolamento
2. 1b. Bobina de desenrolamento
3. 2a. Guilhotina
4. 2b. Guilhotina
5. 3a. Mesa de transferência
6. 3b. Mesa de transferência
7. 4. Rolo puxador comum
8. 5. Tábuas de formação de espiras
9. 6. Equipamento de soldadura
10. 7. Roda giratória de centragem

In addition, the present invention has the advantage of allowing better loop creation. Thanks to the additional existence of a retractable upper table and a centering wheel, better centering is possible for heavy calibrators. List of references

1. 1a. Uncoiling coil
2. 1b. Uncoiling coil
3. 2a. Guillotine
4. 2b. Guillotine
5. 3a. Transfer table
6. 3b. Transfer table
7. 4. Common puller roller
8. 5. Coiling boards
9. 6. Welding equipment
10. 7. Rotating centering wheel

Claims (11)

Continuous industrial equipment with an input section, comprising two unwinding devices (la, lb) for unwinding and feeding the web materials to be transformed, a cutting device (2a, 2b) and a transfer table (3a, 3b) for each band and a joining device (4), so that the transfer tables (3a, 3b) supply said bands to the joining equipment (4) where a band of a posterior coil and a band of a front coil come together, at least one winding table (5) to centralize the bands and a welding equipment (6), where said rear coil band and said front coil band are joined by welding, characterized by the fact that each of the transfer tables (3a, 3b) is also a loop formation table (5), in which the loops for centering the band can be made directly on the referred transfer tables (3a, 3b) and at least fact that provision is made in such a way that nds joined in the joining device (4) will directly feed the welding equipment (6), without further formation of turns. Equipment according to claim 1, characterized in that the transfer tables (3a, 3b, 5) consist of an upper table (3a), defining an upper entry level, which overlaps with a lower table, (3b) defining a lower entry level, providing the equipment with means to, first retract and then raise the upper table (3a). Equipment according to claim 1, characterized in that each of the unwinding devices (la, lb) comprises a unwinding coil. Equipment according to claim 1, characterized in that each cutting device (2a, 2b) comprises a guillotine. Equipment according to claim 1, characterized in that the joining device (4) comprises a common puller roller. Equipment according to claim 2, characterized in that said means comprise at least one hydraulic or pneumatic cylinder to retract the upper table (3a) and at least one hydraulic or pneumatic cylinder to raise the upper table (3b), the latter cylinder being located close to the joining device (4). Equipment according to claim 6, characterized in that the hydraulic or pneumatic cylinders are partially or totally replaced by screws driven by electric or hydraulic motors. Equipment according to claim 2, characterized by the fact that it comprises non-contact detection means to control the height of the loop on the lower table (3b) and prevent a collision of said loop with the upper table (3a). Equipment according to claim 8, characterized by the fact that the non-contact detection means are a light barrier. Equipment according to claim 1, characterized by the fact that it comprises a revolving wheel for centering the web (7) capable of moving towards the web, by means of a hydraulic or pneumatic cylinder. Process to join, center and weld two bands in an entrance section of a continuous industrial equipment, comprising all the characteristics of claims 1 to 7, characterized by the fact of less by the following steps: - a moving coil N is processed, transformed through the lower input level; - a next coil, N + 1, is lined up, prepared and cut at the level of the upper entrance, its front end being placed in front of a common pull roller, in a waiting position; - the rear end of coil N successively leaves the mandrel of the unwinding coil, the lower entry level and the common puller roller, creating a loop on the outlet side of the welding equipment, to center the rear end; - immediately after this operation, the common pull roller is released, the front end of the N + 1 coil is lined up, at the level of the upper entrance, by means of the common pull roller, towards the entrance side of the welding equipment ; - according to the speed differences, between the upper entry level and the common puller roller, a loop will be created on the upper transfer table; - after the creation of the loop, the top roller, of the common puller roller, retracts to allow the movement of the band during the centering process; - the rear end of coil N and the front end of coil N + 1 are spliced, by welding, in the welding equipment; - the new N + 1 band will then feed the line, via the upper entry level; - a second N + 2 band is lined up, prepared and cut, at the lower entry level, the front end being placed in front of the common puller roller, in a waiting position; - the rear end of the N + 1 coil successively leaves the unwinding coil mandrel, the upper entry level and the common pull roller, creating a loop on the outlet side of the welding equipment to center the rear end; - immediately after this operation, the common pull roller is released, the front end of the N + 2 coil is lined up, at the lower level, by means of the common pull roller, towards the entrance side of the welding equipment; - to allow the formation of a high loop, to perform a safe centering function, the transfer table from the top is retracted and raised by hydraulic or pneumatic cylinders and / or by the actuation of screws; - according to the speed differences, between the entry level and the common puller roller, a loop will be created on the bottom transfer table, - after the creation of the loop, the top roller, of the common puller roller, retracts to allow the movement of the band during the centering process; - the rear end of the N + coil and the front end of the N + 2 coil are joined by welding on the welding equipment; - the new N + 2 band will then feed the line via the bottom entry level.

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