MXPA00000574A - Coiling machine for hot rolled stock such as strip or sheet - Google Patents

Abstract

Coiling machine for hot rolled stock with a thickness of between 0.5 and more than 5 mm, arranged downstream of a rolling train and a shears assembly (11) wherein the coiling machine comprises a turntable assembly (12) rotating around an axis of rotation (13) orthogonal to the axis of feed of the rolled stock and lying on a plane substantially parallel to the plane of feed (14) of the rolled stock wherein the turntable assembly (12) supports two coiling mandrels (15a, 15b) arranged diametrically opposite each other and with an axis parallel to the axis of rotation (13), the turntable assembly (12) includes at least a first operating position wherein the first mandrel (15a) is in a position awaiting the leading end of the rolled stock and ready to begin coiling, substantially cooperating with the plane of feed (14) and at least a second operating position, rotated by 180°with respect to the first operating position, wherein the first mandrel (15a) is in a position where the rolled stock is completely coiled and the coil (30) is ready to be discharged and the second mandrel (15b) is in a position awaiting the leading end of the rolled stock and ready to begin coiling, and wherein at least a movable guide blade (20) is arranged upstream of the turntable assembly (12) and includes a first position of exclusion remote from the plane of feed (14), a second working position cooperating from above with the plane of feed (14) and a third position wherein it grips the rolled stock during the transition between the two aforesaid positions.

Description

ROLLING MACHINE FOR HOT LAMINATED MATERIAL SUCH AS A STRIP OR SHEET FIELD OF THE INVENTION This invention relates to a rolling machine for hot rolled material such as a strip or sheet, as presented in the main claim. The invention is applied in the rolling lines for flat products to optimize, rationalize, and accelerate the steps of forming the hot rolled rolls made downstream of the rolling mill. The invention is specifically applied with respect to the production of a strip or sheet both with a thickness of between 0.5 and 5 millimeters, and also of more than 5 millimeters, with the temperature of the laminated material at about 700-800 degrees centigrade or more and with a production of around 20-22 meters per second.

BACKGROUND OF THE INVENTION In the state of the art, there are a plurality of devices and apparatuses for winding strips or sheets that leave the hot or cold rolling mill, which perform their function more or less efficiently. One type of winding machine used particularly in the hot lamination of strip or sheet is the bottom reel, which includes at least two winding mandrels arranged in sequence and below the plane on which the strip or sheet that has to be passed passes. rolled up. This winding system, although widely used, has problems both with respect to the speed at which the rolls are formed and also with respect to the quality of the sheet obtained, especially in the case of products that are particularly thin. In fact, in the case of strip or thin sheet, when the leading end is bent under the plane on which it is fed in order to be wound on it. Furling down, there may be problems caused in the quality of the product. Moreover, the rolling is not carried out in a repetitive manner since it is carried out alternately in two down reels placed at different distances from the cutters. Another problem that also relates to the thinness of the strip or sheet to be rolled is that the strip is rubbed against the path that leads to the rolling machine, which can cause a deterioration in the quality of the surface of the strip or sheet. Another problem is that with the systems known in the state of the art with a guide band for the initial winding, winding speeds must necessarily remain slow. Another problem is the introduction of the strip during the initial winding step when thin strip is being produced. Another disadvantage is the distance between the cutters and the downstream reeling machine due to the consequent dangers of blockages of the front end of the rolled material, and the problems of losing temperature due to radiance. There is also the problem that the rear end of the rolled strip hits the equipment during the winding braking step. It is also a problem to support the winding mandrel as a bracket. Another problem is how to guide the strip without causing damage to the surface of it. JP-A-1157713 discloses a winding device comprising two winding mandrels on which a rolled strip is rolled alternately. The winding of the strip begins with a first mandrel in a first position; then, after some rolls of strip have been rolled, a turntable rotates and reverses the positions of the mandrels, while the strip continues to roll up on the first mandrel. The first mandrel moves to a position to complete the winding and to unload the roll, while a second mandrel is moved to a winding start position.

When the roll has reached the desired size in the first mandrel, a cutting assembly accommodated upstream intervenes in the strip and the front end thereof is diverted towards the second empty mandrel, also because there is a deviator roller and a lower guide. Between the cutting assembly and the turntable there is a guide blade, the function of which is to distribute and deflect the leading end of the cut strip in order to send it in the direction of the new mandrel, keeping the trailing end of the strip guided in the direction of the mandrel that is completing the winding. For this purpose, the guide blade has a triangular shape defining a peak facing the cutting element and the deviating roller, the peak being defined by two sides, an upper side cooperating with the lower face of the strip and with the mandrel that is completing the winding, and a lower side that cooperates with the upper face of the strip and with the new mandrel. The upper side has no pneumatic support element and its sole function is to prevent the end end of the trailing end of the strip from falling down, functioning substantially as a support base for the trailing end during the passage of the end of wrapping. The lower side, on the other hand, is supplied with pneumatic blowing elements which serve first to deflect and then to press the leading end of the cut strip against a lower guide during the winding start step in the new mandrel. The solution of Japanese Patent '713 does not solve any of the disadvantages explained above; on the contrary, it accentuates them causing the strip to slide both on the upper side of the guide and also on the lower guide on which the strip is pressed; it also does not control in any way the blow of the rear end when the winding is stopped. The present applicants have designed, tested and incorporated this invention to overcome the disadvantages of the state of the art by providing a functional and extremely efficient solution both operatively and in terms of product quality.

COMPENDIUM OF THE INVENTION The invention is presented and characterized in the main claim, while the dependent claims describe variants of the idea of the main mode. The purpose of the invention is to provide a winding machine for strip or thin sheet, which is provided with suitable elements for guiding the forward end of the rolled material towards the winding elements and which is convenient for efficiently solving the aforementioned disadvantages and in particular guarantee the efficiency, functionality and rationality of rolling operations. According to the invention, the winding machine comprises, upstream of the turntable assembly and downstream of the cutters, at least a first guide sheet accommodated above the feed plane of the laminate material to occupy a substantial portion of the segment between the assembly of cutting and the turntable assembly to function as a fluid guide for the rolled material towards the mandrels, the guiding sheet including at least one working position substantially parallel to the feed plane and being provided with means for emitting at least one air jet and / or liquid against the upper surface of the laminate. According to a variant, there are two movable guide sheets, one below and one above the feed plane of the laminated material. According to the invention, the movable guiding sheets include grooves in their surfaces which cooperate with the feed plane of the laminated material; the grooves emit jets of air, liquid or a mixture thereof to support the rolled material to be sent for winding.

The pneumatic, hydraulic or mixed support prevents the problems caused by the friction on the surface of the laminated material, which are considerable in the case of thin material as in the invention and therefore avoids a deterioration in the quality of the surface of the finished product . Moreover, this support prevents the front end of the rolled material from turning or bending, in the segment between the stretching, cutting and mandrel assemblies, and thus avoids risks of blockage and impact with the equipment. According to a variant, in cooperation with the air jets, rollers are driven which move at a speed greater than that of the strip and which have the effect of driving the same strip, thus avoiding blockages. According to a variant, the upper movable guide leaf is associated with a second movable guiding sheet, rotating on the first and carrying at least one sliding roller on the free head. The movable guide sheets have an operating position in which they support and guide the laminate material that cooperates with the feed plane of the laminate and a position where they are substantially excluded from the feed plane so as not to create interference. The upper guide blade, moreover, includes a third position that assumes during the cycle and in the phase of transition between the two positions; in this position the upper guide sheet grasps the laminated material with which it is being wound on the mandrel located in its second position, and accompanies the laminate material in its feeding plane to prepare it to be picked up by the other mandrel located in the first position of operation. Another purpose of the invention is to obtain winding conditions which will limit as much as possible any alteration to the characteristics of the surface quality of the rolled material to be rolled. The winding machine according to the invention is assembled at the outlet of a finishing train for the strip or sheet of a thickness which may be between 0.5 and 5 millimeters or above 5 millimeters and which moves at a speed of about 20-22 meters per second. According to the invention, the winding machine is located immediately downstream of a cutting assembly that acts when the winding of a roll is complete, and prepare the front end of the strip which will form the next roll. The cutting assembly, according to the invention, is arranged as close as possible to the winding machine in a manner that minimizes the risk of blockages of the front end of the strip. According to a variant of the invention, the cutters include a positioning and fastening frame that is associated with a mobile capsule that carries the cutting blades and facilitates their replacement. According to a variant, the capsule can be extracted / inserted axially to the axis of the leaves. According to these purposes, the winding machine comprises a retractable rolling path that intervenes when the products of a greater thickness are going to be worked; these can not be rolled up by the winding machine according to the invention and therefore move downstream after the winding machine has been excluded from the line or, in any case, has assumed a non-operational condition. According to the invention, the winding machine consists of a turntable assembly in which two winding mandrels are mounted in a diametrically opposite position. The turntable assembly can rotate to assume at least three positions, respectively an exclusion position and two operating positions. In the first exclusion position, the two mandrels are both in a position of non-contact with the feed plane of the laminate. This position is assumed when the laminated material of great thickness is going to be produced, since the rolling path is placed in the operating position to bring the laminated material to the conventional rolling machines, for example, down-winding machines, or cooling devices. In the first operating position, the first mandrel is in a position where it cooperates substantially with the feed plane of the rolled material, and is waiting to receive the leading end of the rolled material to be rolled, while a second mandrel is in a position which respectively can be for unloading the completed roll or the end of the roll. In this first operating position, the winding of the strip starts and takes place in the first mandrel, for a desired length. In the second operating position, rotated substantially 180 degrees with respect to the first operating position, the first mandrel moves to a position where wrapping is completed, while the second mandrel is brought into a waiting position cooperating with the flat feed of the rolled material to form a second roll. Therefore, the winding method includes a repeated sequence of alternate winding in one mandrel and in the other, as the complete roll is discharged with means known to the prior art of the mandrels before the same mandrel returns to the winding start position.

According to the invention, the mandrel located in the first operating position, where the winding starts and which cooperates with the feed plane of the rolled material, cooperates with an assembly of wrapping rollers mounted on articulated arms that come towards external contact with the rolled material to be rolled, in various circumferential positions, thus facilitating and accelerating the rolling. According to a variant, the front end of the strip as it arrives is cooperating with at least two parallel and adjacent rollers which have the function of heating the front end of the strip. The wrap-around assembly is mounted on a trolley and can assume a non-operative position when the rollers open and do not come into contact with the rolled material being rolled. The non-operative position is assumed at least when the mandrel is moving from its first position to its second operating position to complete the winding. In this second operating position the mandrel cooperates with at least two movable assemblies from a working position to a non-working position. To be more exact, according to the invention, there is at least one assembly to support the mandrel, which intervenes to support the arrow of the mandrel when the roll begins to have a considerable weight, and at least one assembly to support the roll equipped with rollers that are placed from below in peripheral contact with the roll and facilitate the rolling. According to a variant, the assembly for supporting the mandrel operates in accordance with the vector sum of the components of the weight and the stretching action. According to another variant, there are other mobile assemblies equipped with rollers which, in the working position, are brought into contact with the roll to facilitate the winding and make it regular and uniform; they also prevent the back end of the strip, as soon as the strip has been cut off and the roll is in the braking step, hit the equipment and cause damage, and still unwind from the roll. All these assemblies are movable, axially and / or rotatably, to move towards a non-contact position during the movements of the turntable assembly from its first to its second operating position and vice versa or in the exclusion position. BRIEF DESCRIPTION OF THE DRAWINGS The attached Figures are given as non-restrictive example and show a preferred embodiment of the invention as follows: Figure 1 shows the end portion of the rolling line in which the winding machine is installed in accordance with the invention; Figure 2 shows the winding machine according to the invention with the turntable assembly in the inoperative or exclusion position; Figure 3 shows the winding machine according to the invention with the turntable assembly in the first operating position; Figure 4 shows the winding machine according to the invention with the turntable assembly in its second operating position; Figure 5 shows a variant of the previous modalities. Figure 6 is a plan view of a rolling line where the winding machine according to the invention is installed, in a first working design; Figure 7 is a plan view of the winding line shown in Figure 6 in a second working design; Figure 8 is a cross-sectional view of the rolling line in its first working design; and Figure 9 is a cross-sectional view of the rolling line in its second working design.

DESCRIPTION OF A PREFERRED MODE OF THE INVENTION In the appended figures, the winding machine 10 according to the invention is installed at the exit of a hot rolling mill 100 for strip or sheet (not shown here), which is moved to speeds up to 20-22 meters per second, suitable for producing thin laminate material, from 0.5 to 5 millimeters, but versatile and adaptable, as will be described later, to process laminated material with a thickness of more than 5 millimeters. Upstream of the winding machine 10 is a cutting assembly 11 provided with two stretching assemblies 19a and 19b, one located upstream and one downstream of the cutting elements lia and 11b, suitable for cutting the rolled material when the roll It has been completely formed. The cutting assembly 11 has a support structure in the form of substantially U 47, in the vertical arms 47a and 47b from which the two stretching assemblies 19a and 19b are mounted. Between the arms 47a and 47b there is a capsule 48 in which two arrows supporting the leaves 49a and 49b are mounted in a rotatable manner. The capsule 48 can be selectively removed from the support structure 47, either with an upward movement, or by a displacement in the axial direction, parallel to the axes of the arrows 49a and 49b. The entire cutting assembly 11 can also be selectively displaced from its working position as shown in Figures 1-6 and 8 to an inactive position as shown in Figures 7 and 9. In fact, the support structure 47 is it assembles on a pair of rails 50 and can be moved along an axis orthogonal to the axis of the rolling line. The winding machine 10 (Figures 1-4) comprises a turntable assembly 12 that rotates about an axis 13 lying in a plane substantially parallel to the feed plane 14 of the rolled material, the strip or sheet to be rolled and it is substantially orthogonal to the feed axis of the laminate to be worked. The turntable assembly 12 supports two mandrels, respectively 15a and 15b, arranged diametrically opposite each other and each of which rotates on an axis substantially parallel to the axis of rotation 13 of the turntable assembly 12. When rotating about the axis 13 the The turntable assembly 12 allows the mandrels 15a and 15b to assimilate at least three positions. In a non-operational position, shown in the Figure 2, the turntable has both mandrels 15a and 15b not in contact with the feed plane 14 of the laminate. To be more exact, the mandrels 15a and 15b can be accommodated either with their axes in a single horizontal plane, and therefore both are above the plane 14, or with their axes in a single vertical plane, and therefore one of the mandrels 15a is accommodated above the plane 14 and the other mandrel 15b is accommodated below the plane 14. This non-operative position is assumed when the winding machine 10 is in an exclusion position from the line, for example, when the Laminated material is of a thickness greater than 5 millimeters, and therefore can not be wound by the winding machine 10. A rolling path 16 of the retractable type is convenient to cooperate selectively with the winding machine 10 (Figures 2 and 6 9). The rolling path 16 comprises a plurality of rollers 16a assembled in a rotatable manner on the lateral supports of a substantially horizontal bench 60, which can be slid by means of wheels 61 on a lower track defined by a pair of parallel and adjacent rails 62. to the rails 50. The bench 60 can also be slid by means of a slider 64 on a second pair of rails 63 accommodated parallel to the rolling line and therefore orthogonal to the rails 62. Also on the bench 60 there is a pair of protective screens 67 and 68 which, when the turntable 12 is in its inactive or exclusionary position, are convenient for accommodating themselves in this way: the first between the first rollers 16a and the mandrel 15a which is below the track lamination 16; and the second between the rollers 16a and the mandrel 15b which is above the rolling track 16. The protective screens 67 and 68 thus prevent the heat radiated by the laminated material passing over the rollers 16a from reaching and damaging the mandrels 15a and 15b, which during this step of the work cycle are stationary and do not cool down. When the laminated material with a thickness of between 0. 5 and 5 millimeters is being worked, the bench 60 and the relative rolling path 16 are placed in an inactive position (Figures 6 and 8), away from and behind the winding machine 10. However, when the rolled material with a thickness of more than 5 millimeters is being worked, the bench 60 and the relative rolling path 16 are brought to the working position as shown in Figures 2, 7 and 9, by means of the motors 65 and 66. In this operating position, the rolling path 16 is brought into cooperation with the feed plane 14 to accompany the rolled material towards the conventional coiling devices arranged downstream, for example, the bottom coilers 17a and 17b (Figure 1) , after the laminate has passed through the cooling zone 18. However, when the thickness of the laminate is compatible with the winding machine 10, for example, between 0.5 and 5 millimeters, the turntable assembly 12 it accommodates the two mandrels 15a and 15b in one or the other of the two operating positions shown in Figures 3 and 4 in order to wind the strip. In each of the two operating positions, the plane passing through the axes of rotation of the two mandrels 15a and 15b is substantially at an angle of 45 degrees with respect to the vertical plane in which the axes of rotation of the mandrels were when the turntable 12 was in the inoperative or exclusion position as shown in Figure 2. In the first operating position (Figure 3), the first mandrel 15a is substantially accommodated in cooperation with the feed plane 14 while the second mandrel 15b is in an elevated position and far from the supply plane 14. On the other hand, in the second operating position (Figure 4), rotated 180 degrees with respect to the first position, the mandrel 15a on which the roll of rolled material is already being rolled is in the position in which the corresponding mandrel 15b was before, while the latter is in the position where the mandrel 15a was before, ready to receive a new front end of the laminated material. At the outlet of the cutting assembly 11, the stretching assembly 19b accompanies the front end of the laminated material towards the first mandrel 15a, passing it through two movable guides, respectively upper 20a and lower one 20b. The movable guide blades 20a and 20b are arranged opposite each other with respect to the supply plane 14 and are hinged, oscillating at the respective support points 21a and 21b in the vertical arm 47b of the cutting assembly 11 to assume a first position of no contact (Figure 4) away from the feed plane 14 and a second working position (Figures 3 and 5) in direct cooperation with the feed plane 14. The movable guide sheets 20a and 20b are also convenient to be separated from the feed plane 14, together with the cutting assembly 11 on which they are mounted, so as not to interfere with the rolling path 16 and the relative bench 60. The surface of the movable guide sheets 20a and 20b have slots 22 for emitting a jet of water. fluid, preferably air or air mixed with oil or other liquid, which acts as a pneumatic, hydraulic, or mixed pneumatic-hydraulic support for the material laminated in the segment between the cutting assembly 11 and the turntable assembly 12. Thanks to this pneumatic, hydraulic or mixed pneumatic-hydraulic support, it is possible to guide the front end of the strip without bending, turning or rubbing, and in any case ensuring that the laminated material is guided. The upper guide blade 20a is provided with a sliding roller 51 at the end and at least an intermediate position between the first non-interfering position and the second working position. In this intermediate position, the upper guide sheet 20a accompanies the laminated material during the winding end step when the turntable 12 is in the second operating position. In the variant shown in Figure 5, the slots 22 for emitting the fluid jet are included in both the movable guide sheets 20a and 20b, and associated with the slots 22 are the guide rollers 52, which rotate at a peripheral speed greater than the feed speed of the laminate material, avoiding this so that blockages are carried out. Again in Figure 5, the upper guide sheet 20a is associated, in correspondence with the sliding roller 51, with a second upper guide sheet 120a which is rotatable on the first sheet 20a and which is also provided at the end with a slide roller 151, which serves to control and guide the laminate and contain the rear end during the braking step of the roll. The second upper guide sheet 120a may also include slots 22 for fluid jets. During the winding start step on the first mandrel 15a, or on the mandrel which on each occasion is in the cooperative position with the feed plane 14 (Figure 3), an assembly 23 of wrapping rolls 24, mounted on A trolley 25 is taken from an exclusion position (Figure 2) to a working position cooperating with the first mandrel 15a to accompany and guide the forward end of the rolled material around the first mandrel 15a and begin winding. The assembly 23 comprises, in this case, a series of four rollers 24 cooperating with three or four circumferential positions of the mandrel 15a, each of the rollers 24 is mounted on a respective articulated arm 26 associated with a relative trigger 27. it wishes to bring the assembly 23 from the exclusion position as shown in Figure 2 to the working position as shown in Figure 3, the rollers 24 are opened by activating the actuators 27, then the trolley 25 is raised to bring it closer of the feed plane 14 and then an activator 28 is activated to complete the insertion of the rollers 24 in correspondence with the mandrel 15a, so that the latter fits inside the circumferential profile 29 of the assembly 23. Then the rollers 24 close around of the mandrel 15a oscillating the articulated arms 26 around their respective points of support by means of activating the actuators 27. During the pick-up step, the invention Ion provides a calming action on the leading end of the laminate (Figure 5) and for this reason two rollers in par 24a, 24b are included which, when the leading end of the rolled material arrives, perform a pre-bending operation in the same. Then the controlled rolling of the rolled material around the mandrel 15a begins. When the desired number of coils has been wound on the first mandrel 15a, the turntable assembly 12 is rotated 180 degrees to its second operating position (Figure 4) to bring the first mandrel 15a to the position where the coiling is completed and the roll is discharged accordingly, while the second mandrel 15b is brought into the waiting and winding start position which has previously been occupied by the first mandrel 15a. Before the turntable assembly 12 is rotated, the wrapping rolls 24 are opened. While the turntable assembly 12 is rotated, the first mandrel 15a continues to rotate and wind the laminate material on itself until it stops its placement in the position shown. in Figure 4. The rolling continues until the roll 30 being formed reaches a certain weight, at this point the respective support assemblies 31 and 32, accommodated below the mandrel 15a, also intervene to support the mandrel 15a and the roll 30; also at this point, the assemblies 33 and 34 intervene to make the roll regular and uniform, peripherally accommodated to the mandrel 15a. The assembly 31 for supporting the mandrel 15a comprises at least one arm 35, axially movable from a non-contact position, away from the turntable 12, to a position in the co-operates with the arrow 36 of the mandrel 15a. The arm 35, for example, equipped at the end with fork elements, hand elements, saddle type supports or whatever is convenient for this purpose, extends towards the mandrel 15a, driven by the activator 37, and supports the arrow 36 of the mandrel 15a in accordance with the stably increased weight of the roll 30 as it is formed. According to a variant shown in Figure 5, the arm 35 is rotatable and includes at the terminal end a suitable support for supporting the arrow 36 of the mandrel 15a. This support occurs around the component of the stretching force and the force of the weight. The assembly 32 for supporting the roll 30 comprises a mobile trolley 39 that can be lifted according to an axis 38. Above the assembly 32 to support the roll 30 are the rollers 40 for supporting the roll 30 from below; the rollers 40, in their working position, come into contact with the roll 30 and support it from below. The assemblies 33 and 34 for making the regular and uniform winding comprise the respective arms 41 and 42, oscillate around the respective support points 43 and 44 to move from a non-contact position (Figures 2 and 4) to a working position that cooperates with the roll 30 as it is formed. At the end of the arms 41 and 42 are the respective rollers 45 and 46 which, as the roll 30 is being formed, are accommodated at a distance of approximately 10 millimeters from the periphery of the roll 30, so as not to interfere as form, ready to be contacted with the roll of the laminated material in order to perform a braking action and prevent possible collapse or unwinding of the roll 30 when the latter is being completed. According to the variant shown in Figure 5, the arm 42 is provided with a guide appendix 70 that extends beyond the roller 46 to prevent, in collaboration with the guide 120a, the rear end of the laminated material striking uncontrollably against the upper part of the turntable 12 before the roll 30, finished completing, is removed from the mandrel 15a. The assembly 32 for supporting the roll 30 and the assemblies 33 and 34 to make the coiling regular and uniform move, during the winding step, in coordination with the increase in thickness of the roll 30 as it is formed. When the roll 30 has been completed, the cutting assembly 11 located upstream of the rolling machine 10 cuts the rolled material, defining the leading end of the new roll that begins to be wound on the second mandrel 15b, after the assembly 23 of the wrapping rollers 24 have been brought back to the cooperative position with the mandrel 15b, just as was previously done with the mandrel 15a. The assembly 31 for supporting the mandrel 15a, the assembly 32 for supporting the roll 30 and the assemblies 33 and 34 for making the regular and uniform winding cooperating with the first mandrel 15a are partially opened to allow the formed roll 30 to discharge, this is done with ways and means known in the art. The winding cycle can be repeated in the manner described above.

Claims (13)

1. Rolling machine for rolling hot rolled material such as a strip or sheet with a thickness between 0.5 and 5 millimeters, accommodated downstream of a rolling mill which comprises a cutting assembly (11) from which the rolled material emerges along a feed plane (14), wherein the winding machine comprises a turntable assembly (12) that rotates about a central axis of rotation (13) parallel to the feed plane (14), two winding mandrels (15a, 15b) mounted rotatably on the turntable (12) on diametrically opposite sides with respect to the central axis of rotation (13) and with its axes of rotation parallel to the central axis of rotation (13), characterized in that at least a first guide sheet (20a) capable of rotating orthogonally to the plane on which the laminate lies lies above the feed plane (14) to occupy a substantial portion of the segment between the pull assembly and the turntable assembly (12) to function as a fluid guide for the rolled material towards the mandrels (15a, 15b), the guide sheet (20a) that includes at least one working position substantially parallel to the feed plane (14) and being provided with means (22) to emit at least one jet of air and / or liquid against the upper surface of the rolled material.

2. Rolling machine as in claim 1, characterized in that the guide blade (20a) is rotatable between a first exclusion position accommodated above and far from the feed plane (14) and a second working position cooperating with the feed plane (14). ) and substantially parallel thereto, at least one third position for grasping the laminate material in the transient segment between the two positions also being included. Rolling machine as in claim 1, characterized in that the second guide sheet (20b) capable of rotating orthogonally to the plane on which the laminated material lies is accommodated below the feed plane (14) by a substantial portion of the segment between the stretching assembly and the turntable assembly (12) to function as a fluid guide for the rolled material towards the mandrels (15a, 15b), the second guide sheet includes at least one working position substantially parallel to the feed plane (14 ) and convenient for administering a jet of air and / or liquid against the underside of the laminated material to define, together with the upper guide (20a) a controlled passage fluid channel. Winding machine as in claim 1, characterized in that the first guide sheet (20a) is provided with driving rollers (52) suitable for rotating at a peripheral speed greater than the feeding speed of the rolled material. Winding machine as in claim 1, characterized in that the first guide sheet (20a) is terminally connected to another, upper guide sheet (120a) capable of rotating orthogonally to the plane on which the laminate lies in an autonomous and convenient manner for guiding the rolled material being rolled into the mandrels (15a, 15b). Winding machine as in claim 1, wherein an assembly (23) for guiding the strip is convenient to cooperate selectively with each of the mandrels (15a, 15b), the turntable assembly (12) is able to assume, by rotation, a first angled position where a first mandrel (15a or 15b) is in correspondence with the feed plane (14) and ready to receive the front end of the laminate and start rolling, characterized in that the assembly (23) for guiding the strip comprises a plurality of wrapping rollers (24) that operate directly on the laminate and have their axes of rotation parallel to the central axis of the laminate. rotation (13) and arranged along an ideal circumference outside the area occupied by each of the mandrels (15a, 15b) so as to define a circular guide path for the leading end of the rolled material around the mandrel that is temporarily in correspondence with the feed plane (14), the assembly (23) for guiding the strip is normally accommodated in a first inactive position outside the turntable assembly (12) and is selectively mobile to a second working position, associated with the first angled position of the turntable (12), in which it is convenient to cooperate with the leading end of the laminate to guide it around the first mandrel (15a or 15b). Rolling machine as in claim 6, characterized in that the turntable assembly (12) is suitable to assume, by rotation, a second angled position, rotated 180 degrees with respect to the first angled position, in which a second mandrel ( 15b or 15a) is in correspondence with the feed plane (14) ready to receive the front end of the rolled material and begin to wind, while the first mandrel (15a or 15b) is at the same time in a position where the roll (30) is completely rolled up and ready to be unloaded, the assembly for guiding the strip (23) is convenient to assume the inactive position during rotation of the turntable assembly (12) from the first to the second angled position and vice versa. 8. Winding machine as in claim 6, characterized in that there are three wrapping rollers (24) and have their axes arranged substantially at 120 degrees along the ideal circumference, and that at least one of the wrapping rolls (24) can be selectively separating from the ideal circumference to allow the corresponding mandrel (15a, 15b) to fit between the three wrapping rolls (24). 9. Winding machine as in claim 7, characterized in that the wrapping rollers (24) are mounted on corresponding oscillating arms (26) connected to activators (27) suitable to selectively carry them away from the cooperative position with the periphery of the respective mandrel (15a, 15b). Rolling machine as in claim 7, wherein each of the mandrels (15a, 15b) is provided with its own axis of rotation (36), characterized in that at least one assembly (31) for supporting the mandrel (15a) it is provided to cooperate with the rotation arrow (36) of the mandrel that is in the position where the roll (30) is completed and unloaded from the mandrel (15a or 15b), the assembly (31) to support the mandrel (15a) it is movable between an inactive position and a working position where it cooperates with the arrow (36) of the mandrel. Rolling machine as in claim 10, characterized in that the assembly (31) for supporting the mandrel (15a) comprises an arm (35) that is axially movable and includes at the end support elements of the fork, hand or chair type to mount, to support the arrow (36) of the mandrel. Winding machine as in claim 7, characterized in that at least the roll support assembly (32) is provided to cooperate from below with the roll (30) that is formed in the position where the roll (30) is completely rolled and ready to be unloaded from the mandrel (15a, 15b), the roll support assembly (32) is movable and includes a first inactive position and a second cooperative position with the roll (30). Winding machine as in claim 12, characterized in that the roll support assembly (32) comprises a pair of rollers (40) associated with a mobile trolley (39) and with a lifting actuator. 1 . Winding machine as in claim 7, characterized in that at least one assembly (33, 34) is provided for making the winding regular and uniform to cooperate with the periphery of the roll (30) that is formed in the position where the roll (30) ) is completely rolled up and ready to be unloaded from the mandrel (15a, 15b), the assembly (33, 34) for making regular and uniform rolling is mobile and includes a first inactive position and a second position associated with the periphery of the roll (30) being formed. Winding machine as in claim 14, characterized in that the assembly (33, 34) for making the winding regular and uniform comprises an oscillating arm with a roller at the end. Rolling machine as in any previous claim herein, characterized in that the rolling path (16) is provided downstream of the stretching assembly and is suitable for assuming a first retractable position and a second position cooperating with the feeding plane (14), the rolling path (16) extends beyond the turntable assembly (12). SUMMARY Rolling machine for hot rolled material with a thickness between 0.5 and more than 5 millimeters, accommodated downstream of a rolling mill and a cutting assembly (11) wherein the winding machine comprises a turntable assembly (12) that rotates about an axis of rotation (13) orthogonal to the feed axis of the rolled material and lying in a plane substantially parallel to the feed plane (14) of the rolled material where the turntable assembly (12) supports two winding mandrels ( 15a, 15b) arranged diametrically opposite each other and with an axis parallel to the axis of rotation (13), the turntable assembly (12) includes at least a first operating position in which the first mandrel (15a) is in a position waiting for the front end of the laminate and ready to start rolling, substantially cooperating with the feed plane (14) and at least a second operating position, rotated 180 degrees with respect to the first operating position, wherein the first mandrel (15a) ) is in a position where the rolled material is completely rolled and the roll (30) is ready to be unloaded and the second mandrel (15b) is in a position waiting for the leading end of the rolled material and ready to start rolling, and wherein at least one movable guide sheet (20) is accommodated upstream of the turntable assembly (12) and includes a first exclusion position remote from the plane of ali. mentation (14), a second working position cooperating from above with the feed plane (14) and a third position where the rolled material grabs during the transition between the two positions mentioned above.