MXPA99010934A - Reversible finisher laminating apparatus - Google Patents

Abstract

Se resuelven diversos problemas convencionales producidos por el motivo de que la línea de preparación de enrollado y la línea de laminado acabador reversible son independientes entre sí, al unificar ambas líneas sin reducir la eficiencia de la operación de laminado. Un aparato laminador reversible de acuerdo con la presente invención incluye una primera y segunda unidades de enrollado-desenrollado sostenidas por un bastidor común, colocado entre una laminadora reversible para laminar y acabar tiras de acero, y una unidad de unión para unir la porción de extremo trasero de una tira de acero precedente no enrollada por una unidad de desenrollado a la porción de extremo delantero de una tira de acerca posterior, directamente o por medio de una tira postiza, o para unir tiras postizas a porciones de extremo de una tira de acero de manera que las posiciones de ambas unidades de enrollado-desenrollado son intercambiables.

Description

REVERSIBLE FINISH LAMINATOR APPARATUS BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reversible finishing laminating apparatus for manufacturing stainless steel sheets, silicon steel sheets, etc., using a reversible finishing laminator. 2. • Description of the Related Technique When materials that are highly resistant to deformation such as stainless steel sheets or silicon steel sheets are laminated, reversible lamination is generally carried out thereon by using a small roller mill such as a Scndzimir rolling mill. That is, as shown in Figure IB, a strip 14 of steel is repeatedly rolled to be formed to a predetermined thickness while being unwound and wound several times and between a pair of winding / unwinding units 11 and 12. However, during the unwinding of a steel strip, since several turns of the rolled steel strip 14 are always necessary, in a longitudinal end portion (referred to as a portion in the following) it is always necessary that they be left on the ends of the strip. mandrels of the winding / unwinding units 11 and 12 to maintain the appropriate strip tension, the unwound portions wound all the way through, are produced so that there is a defective portion called "an uncoiled portion" by adding a length thereto partial of a strip 14 of steel corresponding to the path between the winding-unwinding unit and the place directly below the operation rolls. Accordingly, in order to minimize this defective portion, a preparatory winding line, a prewinding process is placed in a conventional separate manner in which false strips known as "leader strips" are welded to both ends of a steel strip or the ends of steel strips are welded to connect to each other directly or by means of a false strip to increase the length of the steel strip. This is done in a way that reduces the defective portion, leading to improvements in performance, etc. The preparatory winding line also frequently includes a side trimmer to remove by cutting the strip edges to remove defective portions located at the side end portions (referred to as an edge portion in the following) from a steel strip or to adjust the side length of a steel strip. The structural examples of the winding preparatory line mentioned above and a winding line will now be described. As shown in Figure 1A, the preparatory winding line is formed of an unwinding unit 1 for rolled steel strips 10, an approximate leveler 2 for modifying the roll assemblies of the steel strips 10, a shear 3 for removing by cutting the end portions of the welding steel strips 10, a strip supply unit 4 for supplying false strips (not shown), a welder 5 for welding the end portions of the steel strips 10 together or for welding an end portion of the steel strip 10 to an end portion of the insert strip, a rectifier 6 for grinding the welded portions so that the surfaces thereof are uniform, a side trimmer 7 for cutting off edge portions of the steel strip 10, grinding rollers 8 for uniforming the burrs on the cut surfaces produced by the side trimmer 7, and a winding unit 9 for winding the steel strip 10. Also illustrated in the drawings is a pair of deflector-pressure rollers 30. The shearing 3 mentioned above, the strip supply unit 4, the welder 5 and the grinding machine 6 form a joint unit, according to the present invention. The grinding machine 6 is not an essential component of the joint unit. The side trimmer 7 and the grinding rollers 8 are also not mandatory components of the joint unit. As shown in figure IB, the winding line is formed of a winding-unwinding unit 11 on the input side, a laminator 13, and a winding-unwinding unit 12 on the output side. The deflector rolls 15 are also illustrated in the drawing. However, since the preparatory winding line and the winding finishing line have been conventionally independent from each other, the following problems are related as described in the following, in items (1) to (4). (1) The preparatory winding line and the reversible finishing line are required to have respective workers assigned to them. (2) These lines require handling operations so that the steel strip completed with the operation in the preparatory winding line is wound, for a time, in the winding unit located on the exit side of the preparation line. rolled to be transferred off the line for tentative storage in a rolling field; then, one of the steel strips waiting for the winding field is placed on the winding-unrolling unit in the finishing rolling line to be fed to the rolling line. In addition, in the line of finishing plaster, which has a supply unit placed on the inlet side to reduce the idle time (installation time) of the line, the steel strips tentatively wait in the rolling field, and are placed on the supplying unit. (3) Since both the winding preparation line and the reversible finishing laminate line are independent of each other, an ineffective process such as winding and supply is repeated, and a plurality of windings must be processed in the preparation line. rolled, in advance while waiting in a predetermined location so that the next rolling can be fed to the rolling line just after the rolling of a preceding roll is completed. (4) Steel strips are likely to be damaged during handling operations. In order to solve the aforementioned problems, a single line can be proposed, in which the winding preparation line and the reversible finishing line are simply unified in series, that is, after the steel strips If they are welded together or welded between a steel strip and a false strip, rolling can be carried out successively. However, this line has the following problems. (5) Since the steel strip must be stopped during welding operations, rolling operations must also be stopped, resulting in reduced productivity in rolling operations. (6) The distance from the unwinding unit to the operating rollers is increased, so that the length of the false strip is increased to that extent, which requires a unit supplying a larger scale strip and increased costs, according to the increased length of the false strip. (7) Distributing a plurality of mills in series to replace the reversible mill with a one-way mill which may be considered; however, the cost of the equipment increases. Therefore, any single line, in which the winding preparation line and the reversible finishing line laminate are unified, has not yet been built due to the reasons of subsections (1) to (7).

BRIEF DESCRIPTION OF THE INVENTION In view of the problems described above, the present invention has been realized. Accordingly, it is an object of the present invention to solve the problems by unifying the winding preparation line and the reversible finishing line without reducing the efficiency of the rolling operation. In order to solve the problems described above, a finishing laminating apparatus that is provided by the present invention comprises an unwinding unit for uncoiled steel strips; a joining unit for attaching a steel strip to at least one other steel strip and a false strip, the joining unit being placed downstream of the unwinding unit; a first winding-unwinding unit for winding and unrolling steel strips, the first winding-unwinding unit is placed downstream of the joining unit; a reversible laminator for steel strip finishing laminate, the reversible laminator is placed downstream of the first winding-unwinding unit, - a second winding-unwinding unit for winding and unrolling steel strips, the second winding unit- unwinding is placed upstream of the reversible laminator; a third winding-unwinding unit for winding and unrolling steel strips, the third winding-unwinding unit being placed downstream of the reversible rolling mill; an exchange means for changing the positions of the first winding-unwinding unit and the second winding-unwinding unit by moving the first winding-unwinding unit and the second winding-unwinding unit together.

According to the present invention, during the finishing lamination of the preceding steel strip, a subsequent steel strip is attached to the end portions of the false strips, etc., independently of this finishing rolling operation, ie without stop the laminator and then roll up the first winding-unwinding unit. When the finishing winding operation is completed and a preceding steel strip is rolled up by the third winding-unwinding unit, the first winding-unwinding unit is changed to the second winding-unwinding unit and the change is made of the second winding-unrolling unit to the first winding-unwinding unit by the exchanging means. Therefore, conventional handling operations with the following steel strips are simplified, as described above. That is, in a finishing laminating apparatus, according to the present invention, it has the effect that the winding preparation line and the reversible rolling line can be joined without reducing the efficiency of the finishing rolling operation.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1A is a schematic representation showing a conventional winding preparation line; Figure IB is a schematic representation showing a conventional reversible finishing line; Figure 2 is a schematic representation of a reversible finishing laminate line, according to one embodiment of the present invention, showing a state where the insert strip is welded to the leading end portion of a rear steel strip; Figure 3 is a schematic representation of a finishing laminating line, according to the embodiment of the present invention, showing a state where the facer strip is welded to the rear end portion of the next steel strip, - the Figure 4A is a schematic representation of the change from the first winding-unwinding unit to the second winding-unwinding unit, showing the state in which the preceding steel strip has completed the rolling operation; Figure 4B is a schematic representation of the change of the first winding-unwinding unit to the second winding-unwinding unit, showing a state where the next steel strip starts the rolling operation after the winding units change - unwound; and Figure 5 is a schematic representation showing another means of changing to change the winding-unwinding units.

DESCRIPTION OF THE PREFERRED MODALITY With reference to the drawings, one embodiment of the present invention will now be described. In addition, similar reference numbers designate similar functional portions common to the conventional example described above (FIGS. 1A and IB) with the description thereof omitted for brevity. Figure 2 illustrates a reversible finishing laminating apparatus according to the embodiment of the present invention. Although the basic configurations of the "CP" section of the winding preparation and the "CRM" section of the reverse rolling laminate are the same as in the conventional section, the "CP" section of the coil preparation and the "CRM" section of the reverse laminate Finisher is attached by connecting the winding unit 9 on the output side of the conventional winding preparation line to a second winding-unwinding unit 11 of the winding line on the input side to form what is called a unit of unwinding-unwinding type of carousel, which has two winding-unwinding units, 20 and 11.

That is, a first winding-unwinding unit 20 is replaced by the winding unit 9 on the output side of the winding preparation line, the first winding-unwinding unit 20 and the winding unit 11- unwinding (referred to as the second winding-unwinding unit below), are supported by a common frame 21. A rotation axis 22 is placed at the midpoint of the segment line connecting the mandrels of the first unit for winding-unwinding and the second winding-unwinding unit 11 in the frame 21, and the frame 21 is rotated about the rotation axis 22 by an actuator such as an oil motor or an oil cylinder (not shown). ). The positions of the first winding-unwinding unit 20 and the The second winding-unwinding unit 11 is rotatably interchangeable with the frame 21 at an angle of 180 °. Therefore, an exchange medium of the frame 21 and the actuator (not shown) is realized. In order to allow the welder 5 to weld a 20 strip 23 insert to the front end portion of a rear steel strip 10 during the rolling operation of a preceding steel strip 14, an interface dimension between the positions of the welder 5 and the first and second units 20 and 11 of winding-unwinding is decided by considering the maximum length 25 of the fake strip 23.

In the "CP" section of winding preparation of this embodiment, as shown in figure 2 different from the conventional example described above, an edge grinder 8 'is placed upstream of the welder 5, instead of the side trimmer 7 and the grinder rolls 8; however, the side trimmer 7 and the grinder rollers 8 (or the edge grinder 8 ') can be placed downstream of the welder 5 just as in the conventional example. That is, the winding preparation line can include any other unit except the conventional winding unit 5 on the output side. Next, the operations, etc., of the finishing laminating apparatus formed as described above will be described. During the reverse rolling of a preceding steel strip 14 in the rolling machine 13 by repeated winding and unrolling of the preceding steel strip 14 between the second winding-unwinding unit 11 and a third winding-unwinding unit 12 by means of the rolling mill 13 in the rolling "CRM" section, a rear strip 10 of steel is unrolled independently of this rolling operation just as a conventional operation by the unwinding unit 1, and is welded at the front end portion thereof to a false strip 23 (see Figure 2) to be rolled up in the first winding-unrolling unit 20, one after the other, and furthermore, a facepiece 23 is welded to the rear end portion of the steel strip 10 (see Figure 3) to be rolled in the first winding-unwinding unit 20, completing the winding preparation operation in which the false strips are welded to the end portions of the steel strip 10. The "CP" section of winding preparation and the "CRM" section of the inverse rolling laminate section are joined together in this manner, the front and rear end portions of a rear steel strip 10 can be welded to 23 strips without reducing the efficiency of the rolling operation of a preceding steel strip, that is, without stopping the laminator by welding the fake strips 23. Further, when the rolling operation of a preceding steel strip 14 is completed and the steel strip 14 is wound by the third unwinding-unwinding unit 12 as shown in Figure 4A and 4B, the first and second units 20 and 11 of winding-unwinding are exchanged between them, that is, the first winding-unwinding unit 20 is moved to the second winding-unwinding unit 11 and vice versa, by the rotation of the frame 21 at an angle of 180 °. A strip 14 of new steel in the first winding-unwinding unit 20 is unrolled consecutively and passed through a step-by-step operation to the third winding-unwinding unit 12 by means of the rolling mill 13 is carried out, so that start a new rolling operation.

In this way, the activation time can be established, that is, the line time without operation, which is an important factor to control the efficiency of the rolling operation, as can be established at a level similar to a conventional time by an independent laminate line. That is, when the "CP" section of winding preparation and the "CRM" section of the reverse rolling finisher simply connect together, an additional idle time line is produced by welding a false strip to the rear end portion. of a preceding steel strip that is laminated, before completing the first rolling step of the preceding steel strip. On the other hand, the idle time of the above mentioned additional line can not be generated by connecting a false strip to the rear end portion of a subsequent steel line during the rolling of a preceding steel strip using a rotational frame such as which is presented in the invention. Since a rear steel strip 10 with fake strips 23 welded thereto in the "CP" section of winding preparation, is incorporated within the "CRM" finishing reverse laminate section by only rotation of the frame 21, the transition operation of the steel strips 10 from the "CP" winding preparation section for the "CRM" inverse rolling laminate section can be carried out simply and uniformly. Moreover, since the coils do not need to be removed, the mandrel of the winding-unwinding unit 20 for a time to adjust them in another unit or to place them in a waiting area (a winding ground) for a certain time, are substantially reduced the damage possibilities of the steel strips during the transition from the "CP" winding preparation section to the "CRM" reversing laminate section. By distributing a side trimmer to remove by cutting the edge portions of the steel strips, the grinding rollers to uniform the burrs on the cutting surfaces produced by cutting off the side trimmer, or a grinder to grind the welded portions of As the surfaces of the same in the roll preparation section "CP" smoothly return, damage to the operation rolls of the laminator 13 can be prevented due to the burrs of the edge portions after trimming or spheres of portions of welding. This results in a satisfactory finishing rolling operation even if the "CP" winding preparation section and the "CRM" reversible lamination section are unified. Although it has been described in the above (Figure 3) the case in which the end portions of a strip 10 of steel later are welded to strips 23 in the preparation section of coiling "CP", the process of preparation of coiling it can be carried out by welding the end portions of the steel strips 10 together directly or by means of a fake strip 23 to increase the length of the steel strip. The exchange means for changing the first winding-unwinding unit and the second winding-unwinding unit 11 is not limited to the structure where both winding-unwinding units 11 and 20 are supported by the common frame 21, as mentioned before, and can be shaped by other mechanisms insofar as the mechanism can change positions of both winding-unwinding units 11 and 20 and keep them together. For example, the first winding-unwinding unit 20 and the second winding-unwinding unit 11 can be supported by respective frames 21A and 2IB, as shown in Figure 5, so that each of the frames 21A and 21B is moves along directions of the arrow indicated in Figure 5 by a guide means and an actuator (not shown), or so that both frames 21A and 2IB are rotated linked together so as to exchange positions of the first unit 20 of winding-unwinding and the second winding-unwinding unit 11. further, a first strip of steel can be passed directly at the beginning of the operation towards the side of the laminator 13 to be wound up towards the third winding-unwinding unit 12 without using the first and second winding-unwinding units 20 and 11. . In the modality described above, the case of an even number of rolling steps is described; however, an odd number of laminate steps can of course be adopted. In this case, a steel strip to which a winding preparation treatment is provided is laminated to the laminator 13 while being subjected to reciprocating movement between the second winding-unwinding unit 11 and the third winding-unwinding unit 12. , so that it can be wound on the second winding-unwinding unit 11 after completing the rolling. As described above, a finishing laminating apparatus, according to the present invention, has an effect that the lamination preparation section and the reversible lamination section can be unified without reducing the efficiency of the finishing laminate. By unifying the laminate preparation line and the reversible laminate line, the following effects occur. (1) Even when the supply unit is omitted in the rolling line, the establishment time in the rolling line is not increased, that is, the supplying unit can be omitted without reducing the efficiency, thus reducing the costs of building. (2) The number of workers can be reduced by unifying both the winding preparation line and the reversible rolling line. (3) They do not need to wait for rolling a plurality of steel strips to which the treatment has been provided in the winding preparation line. (4) Since the winding transition from the winding preparation line to the rolling line is performed while winding remains inserted into the same winding-unwinding unit mandrel, the chances of winding damage during the winding substantially decrease the transition. With these features, the transition operation of the coils from the rolling preparation section to the rolling section can be effectively simplified. Furthermore, with these characteristics, even when the winding preparation line and the rolling line are unified, a satisfactory rolling operation can be carried out without damaging the rolling mill operation rolls.

Claims (7)

1. l. A finishing laminating apparatus, comprising: an uncoiling unit that unrolls at least one strip of steel; a joining unit joining a steel strip to another steel strip or to a false strip, the joining unit is placed downstream of the unwinding unit; a first winding-unwinding unit winding and unrolling at least one steel strip per lp, the first winding-unwinding unit being placed downstream of the joining unit; a reversible laminator laminating with at least one strip of steel, the reversible laminator being placed downstream of the first winding-unwinding unit, - a second winding-unrolling unit winding and unrolling at least one steel strip , the second winding-unwinding unit is placed upstream of the reversible laminator; a third winding-unwinding unit winding and unwinding at least one steel strip, the third winding-unwinding unit being placed downstream of the reversible rolling mill; and an exchange device that changes the respective positions of the first winding-unwinding unit and the second winding-unwinding unit by moving the first winding-unwinding unit and the second winding-unwinding unit which are held together.
2. 2. The finishing laminating apparatus, as described in claim 1, wherein the exchange device includes a movable common frame that holds the first winding-unwinding unit and the second winding-unwinding unit.
3. 3. The finishing laminating apparatus, as described in claim 1, wherein the joining unit performs at least one of: wherein a steel strip is a preceding steel strip having a rear end portion and which is unwound by the unwinding unit and the other steel strip is a rear steel strip having a front end portion, which joins the rear end portion of the preceding steel strip with the front and a portion of the Next steel strip, the connection is made with at least one connection directly to the preceding and successive steel strips and the joining of the preceding and successive steel strips by means of a false strip, - and where a steel strip includes a front end portion and a rear end portion, and that further includes another facepiece, the attachment of the facepiece to the front end portion and the attachment of another facepiece to the farther end portion ro.
4. 4. The finishing laminating apparatus, as described in claim 1, wherein at least one steel strip includes end portions, the joining unit includes a cutting device that cuts the end portions of at least one steel strip. , and a false strip supply unit that supplies the insert strip.
5. 5. The finishing laminating apparatus, as described in claim 4, wherein at least two of a steel strip, the other steel strip and the insert strip include joined portions, the joining unit further includes a grinding machine that rectifies the united portions.
6. 6. The finishing laminating apparatus, as described in claim 4, wherein the joining of at least two of a steel strip, and the other steel strip, and the false strip form at least one of the edge portions and burrs, the joining unit further includes at least one of a side trimmer that removes by cutting the edge portions, and crushing rolls that smooth the burrs.
7. 7. The finishing laminating apparatus, as described in claim 6, wherein the joining unit further includes an edge grinder.