Rolled product winding system and method

Abstract

The invention relates to a system for winding a rolled product, comprising a rotating winder (10) comprising: a winding spool (11); a reel rotating means (12); a dispenser (13) adapted to guide the rolled product in position towards the reel at an instantaneous winding point; dispenser translation means (15). The system comprises a control and command unit (20) configured to control the rotating means and the translating means in a coordinated manner according to a predetermined winding procedure. The detection device (30) comprises at least one laser triangular profilometer (31) arranged substantially in a radially opposite position of the dispenser with respect to the reel and adapted to continuously detect the surface profile of the coils of the rolled product every increase of one turn. The system includes a processing and computing unit (200) configured to feedback adjust the translation speed of the dispenser based on the surface profile of the coil detected by the profilometer (32) every increase of one turn.

Description

Technical Field

[0001] The present invention relates to a system and a method for coiling rolled products in the steel industry.

[0002] In particular, the invention allows controlling, regulating and indicating the hot or cold coiling of metal semi-finished products such as metal bars, wires, tubular elements etc. coming from steel plants for the production of for example metal structures, for example to obtain reinforced concrete or other types of structures. Background Art

[0003] As is known, winding systems are suitable for making coils of hot or cold semi-finished metal products such as metal bars, wires, tubular elements, square bars or the like, either from steel mills or secondary processed products. In the following description, various types of metal products will be collectively referred to as bars.

[0004] It is known that for some applications the rod has an uneven surface texture, characterized by the presence of edges or wrinkles that change its cross section. This can affect the winding of the coil.

[0005] The bar is often wound while still hot or very hot. This affects the cross section of the bar that is wound and thus the winding in the coil.

[0006] Typically, a winding system consists of:

[0007] - a rotating coiler around which the turns of the coil are formed, and

[0008] - A movable distributor that works in conjunction with the rotary coiler to guide the bars along the height of the coil.

[0009] The coiler generally comprises a spindle associated with holding elements defining the width of the coil, wherein at least one of the holding elements is removable for removing the coil.

[0010] The rotating coiler and its rotation axis can be arranged vertically or horizontally. In both cases, the dispenser is positioned at the side of the rotating coiler.

[0011] In use, the distributor shuttles between the two axial ends of the coiler. This movement occurs in a plane parallel to the axis of rotation of the coiler. This plane may pass through the axis of the coiler or remain tangential to the cylindrical surface of the coils of different diameters being formed.

[0012] The basic aim of the winding process is to wind the rod so as to fill the coiler as evenly as possible, avoiding overlaps and / or gaps between the turns of the coil.

[0013] As mentioned above, the winding is certainly affected by the cross section of the rod and its variability. Therefore, knowing only the nominal value of the rod cross section is not enough to obtain sufficiently precise control over the coil formed to optimize the filling speed and avoid overlaps and / or gaps between adjacent turns.

[0014] During winding, winding systems of conventional type do not optimally coordinate the functions of the coiler or distributor so that the turns are positioned in a desired manner with respect to the above-mentioned optimization parameters, depending on the cross section and characteristics of the rod.

[0015] During winding, incorrect arrangement of the turns may result in defects in the final coil, such as gaps and / or overlaps of some or all turns. Due to the defects of the known system, the coil obtained from the known system may therefore have a low coil density factor, which is defined as the ratio of the effective volume of the coil to the total coverage area of ​​the coil.

[0016] These defects will generally be reflected in the efficiency of the production process fed by the coils thus obtained.

[0017] In order to improve the quality of the coils, some control and regulation devices have been proposed, which can measure some parameters, including the rod dispensing speed, and can use the information collected to control and manage the winding. However, these known devices are unreliable in the indirectly measured parameters. This means that the corresponding adjustments of the coiler rotation speed and / or the offset speed and / or the distributor position are also inaccurate. In addition, these known devices not only cannot detect the cross section of the rod, but also have to be constantly coordinated with the distributor and have to be replaced and / or adjusted from time to time according to the cross section of the rod.

[0018] In order to overcome the above limitations, a device and a winding management method are proposed based on the direct detection of some winding parameters of the bar on the coil as described in EP3362390B1.

[0019] For more details, refer to EP3362390B1. Figure 1 and Figure 2 This management device is intended to cooperate with a winding device provided with a dispenser B having a feed outlet C for hot or cold semi-finished metal products and a reel D. The dispenser and the reel are moved respectively by suitable controlled movement and rotation means.

[0020] The management device comprises:

[0021] - a video recording system E configured to acquire images of said semi-finished metal product;

[0022] a processing and calculation unit F configured to process said images and continuously calculate the equivalent diameter of said semi-finished metal product and the inclination angle defined between the axis of the feed outlet C and the instantaneous winding point of said semi-finished metal product on said reel D;

[0023] A control and command unit G configured to control said operating parameters obtained with reference operating parameters previously provided and to control the movement and rotation means of said dispenser B and said reel D in a coordinated manner.

[0024] The management method includes the following steps:

[0025] - a step of inputting data of reference operating parameters of winding (desired inclination angle and equivalent diameter of said metal semi-finished product at the first layer of coil formed and at the i-th rotation of said winding shaft D) into the control and command unit G;

[0026] - a step of acquiring images by a video recording system during winding, the image acquisition being coordinated with the winding speed,

[0027] - a step of image processing and continuous calculation of at least the operating parameters (angle of inclination and equivalent diameter of said semi-finished metal product) by means of a processing and calculation unit F,

[0028] - a step of comparing the operating parameters obtained by image acquisition with the reference operating parameters input into the control and command unit G;

[0029] - A step of converting any differences between reference operating parameters and said obtained operating parameters into a coordinated change in the speed of movement of said dispenser and / or the speed of rotation of the spool.

[0030] The method for managing the winder described in EP3362390B1, although it allows a significant improvement in the quality of the reel, is not easy to implement, since the step of detecting the control parameters must be performed on the metal semi-finished product at the instant of winding it onto the reel D, in which position the semi-finished product is more affected by vibrations than when it is wound on the reel. The detection of the inclination angle is therefore affected by vibration phenomena caused by the rotation of the winder and the feeding movement of the semi-finished product. In order to avoid a loss of precision, this detection step must be carried out in a particularly precise manner. This complicates the method for managing the product.

[0031] Therefore, there is a need for a winding system and management method that continuously ensures the correct winding of the coil, but enables the winding to be achieved in a simpler and more reliable manner. Summary of the invention

[0032] The object of the present invention is therefore to obviate all or part of the above-mentioned problems of the prior art by providing a system and a method for winding rolled products in the steel industry which allow correctly obtaining the wound coil in a simple and reliable manner.

[0033] Another object of the present invention is to provide a system and method for coiling rolled products in the steel industry that is easy to manufacture or implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In accordance with the foregoing objects, the technical features of the present invention can be clearly found in the content of the following claims, and its advantages will become more apparent from the detailed description given below with reference to the accompanying drawings, which show one or more embodiments given only by way of non-limiting examples, in which:

[0035] Figure 1 shows a perspective view of the winding management device described in EP3362390B1;

[0036] Figure 2 Shows Figure 1 A top view showing the perspective of the management device;

[0037] Figure 3 shows a top view of a winding system according to an embodiment of the present invention;

[0038] Figure 4 Shows Figure 3 Magnified details of

[0039] Figure 5 Shows Figure 3 A perspective view of a portion of a winding system relating to a winder is shown with some parts removed to better illustrate other parts;

[0040] Figure 6 Shows Figure 3 a top orthogonal view of a portion of a winding system associated with a winder as shown;

[0041] Figure 7 and Figure 8 are two orthogonal side sectional views, which schematically show the Figure 6 Two different steps in forming the coil in the reel of the winder;

[0042] Fig. 9 and Fig.10 are two orthogonal side sectional views, which schematically show the Figure 6 The coil formed in the reel of the winder in the embodiment of the present invention is represented by a graphic representation of the spatial coordinates with reference to the scanning window of the laser profiler;

[0043] Fig.11shows a graph relating to the growth trend over time of some layers of the coil formed achievable with the winding system according to the invention;

[0044] Fig.12 and Fig.13 are two orthogonal side cross-sectional views schematically showing two different operating conditions for forming a layer relative to a theoretical reference condition. Figure 6 The coil is formed in the reel of the winder. DETAILED DESCRIPTION

[0045] With reference to the drawings, a rolled product coiling system in the field of steel industry according to the present invention is indicated as a whole by reference numeral 1 .

[0046] For the sake of simplicity, the winding method according to the invention will be described after the winding system, with reference to the winding system.

[0047] In the following text and in the following description and claims, reference will be made to the winding system 1 in use. Therefore, any reference to a lower or upper position, or to a horizontal or vertical orientation, must be understood in this sense.

[0048] like Figure 3 As shown, the winding system 1 is intended to be installed in a rolling line 100 suitable for producing rolled products. In more detail, the system 1 is placed at the end of such a line 100.

[0049] like Figure 3 As shown, the end of the rolling line 100 may be divided into two or more branches, each of which may be provided with a winding system 1 according to the invention.

[0050] According to a general embodiment of the present invention, a system 1 for winding a rolled product comprises a winder 10 .

[0051] The winder 10 itself is known to the person skilled in the art and will not be described in detail, except to point out that the winder 10 itself comprises:

[0052] - a winding reel 11;

[0053] - Spool rotation means 12 suitable for rotating the spool 11 around the axis of rotation Y at the spool rotation means Vr.

[0054] In more detail, Figure 7 and Figure 8As shown, the reel 11 includes a main shaft 110, which extends coaxially with the rotation axis Y, and the rolled product P is gradually wound around the main shaft to form a multi-layer winding coil 2S1, S2, S3, ... Sn. The rotation axis Y of the reel 11 can be vertical or horizontal. The main shaft 110 has a diameter D1 that defines the inner diameter of the coil 2 and a height H1 that defines the height of the coil 2. Preferably, the reel 11 is provided with two axial limiting elements 111 and 112, which are located at opposite axial ends of the main shaft 110. Advantageously, as Figure 5 As shown, one of the two axial limiting elements (preferably the upper one 112 in the case of a vertical axis reel) is removable since it consists of a movable baffle 112'.

[0055] The winder 10 further comprises:

[0056] - a distributor 13 adapted to guide the positioning of the rolled product P on the reel 11 at the instantaneous winding point W and provided with a product feed outlet 14;

[0057] - A distributor translation device 15, which is suitable for moving the distributor 13 relative to the reel 11 so that the product feed outlet 14 performs an alternating translation movement of the reel parallel to the rotation axis Y so as to distribute the rolled product on the reel and change the instantaneous winding point of the rolled product on the coil formed parallel to the axis Y and on the reel over time.

[0058] like Figure 6 As shown, the instantaneous winding point W refers to the first contact point of a portion of the rolled product on the reel or the surface of the formed coil. In other words, the instantaneous winding point is the point where the rolled product is tangent to the surface of the formed coil or to the reel.

[0059] The coiling system 1 for rolled products further comprises a control and command unit 20 configured to control the rotating means 12 and the translating means 15 in a coordinated manner according to a predetermined winding program according to:

[0060] - predetermined operating reference parameters storable by said control and command unit 20, and

[0061] - Operating parameters which can be acquired in real time during winding by the control and command unit 20 through the detection means 31 , 32 with which the winding system 1 is equipped.

[0062] According to the present invention, the detection device comprises at least one laser triangulation profiler 31, which:

[0063] - is arranged substantially diametrically opposite the dispenser 13 with respect to the reel 11, and

[0064] - Suitable for continuously detecting the surface profile of the rolled product coil at each turn along the increasing development of the height of the formed coil.

[0065] The expression "essentially arranged diametrically opposite the dispenser 13 relative to the reel 11" means anywhere in a half-plane opposite to the half-plane in which the dispenser is located, the two half-planes being determined by the diametric plane PD passing through the instantaneous winding point W and the axis of rotation Y of the reel.

[0066] like Figure 6 As shown, the profilometer 31 is oriented relative to said reel 11 so as to scan the surface of the coil in a position angularly offset about the axis of rotation Y relative to said instantaneous winding point W of the rolled product.

[0067] By means of the present invention, the surface profile of the formed coil is detected at a given diameter section, rather than detecting the winding angle on the winding shaft.

[0068] Furthermore, the detection can be carried out not at the instantaneous winding point W (the area where the rolled product P is affected by the vibration), but at another part of the coil downstream of this point W, where the rolled product is much less affected by the vibration because it is already stably wound on the reel.

[0069] By means of the system 1 according to the invention, windings can be implemented and managed more easily and more reliably.

[0070] Preferably, the orientation position of the profilometer 31 for scanning the coil surface relative to the reel is angularly offset by an angle between 75° and 105° about the rotation axis Y relative to the instantaneous winding point of the rolled product. More preferably, the angle α is about 90 degrees (e.g. Figure 6 shown).

[0071] The laser triangulation profiler 31 and its operating principles are known to those skilled in the art and are not described in detail here except to point out that the profiler 31 comprises:

[0072] - a laser emitter 310 adapted to emit a laser beam; and

[0073] - a sensor 311 adapted to detect the reflected light generated by said laser beam.

[0074] Operationally, a target (surface of the coil) is illuminated by a laser beam emitted by the emitter 310. Light reflected from the surface is detected by the sensor, generating a profile of the illuminated surface.

[0075] Preferably, if Figure 5As shown, the profiler 31 emits a laser beam LB which irradiates the entire height H1 of the reel and thus the formed coil. Advantageously, if a single laser beam cannot fully irradiate the height of the reel, two or more laser profilers can be provided. In this case, the height of the reel is divided into several parts, each of which is covered by a laser profiler.

[0076] Advantageously, said at least one laser triangulation profiler 31 is suitable for detecting, for each turn:

[0077] - a distance Xd which separates at least one laser triangulation profiler from the turn itself in a plane perpendicular to the axis of rotation Y of the reel, and

[0078] - a height position Yc, this position along the axis of rotation Y relative to a reference plane RP, perpendicular to the axis of rotation Y and situated at one of the two axial ends of the reel.

[0079] Operationally, having noted said distance Xd of the turn belonging to the nth layer of the coil and knowing the diameter of the (n-1)th layer (previously calculated, the diameter of the coil spindle, the number of layers already formed and the diameter of the rolled product (nominal or actual)), the radial distance Xc from the axis of rotation Y of the reel is immediately calculated for this turn, and thus the diameter Dn of the nth layer. Advantageously, this calculation can be performed by the processing and calculation unit 200 (the system 1 is provided with this processing and calculation unit, which will be described later and which is preferably integrated into the command and control unit 20), or by a PLC mounted directly on the profilometer.

[0080] Therefore, with the aid of the laser profiler 31, the spatial coordinates Xc and Yc of each turn in a coordinate system having the rotation axis Y as its y-axis and the diametrical axis of the reel lying on the reference plane RP and passing through the reel / coil area scanned by the profiler 31 as its x-axis can be determined.

[0081] According to an alternative embodiment of the invention, a profilometer may be used to detect the surface profile of a wound coil to detect winding defects, which essentially consist of any empty gaps between the coils, as an alternative or in addition to the location of the turns.

[0082] Advantageously, if Fig. 9 and Fig.10 As shown, the at least one laser triangulation profiler 31 can be electronically operated to scan within a scanning window F, the height H of which is less than the height H1 of the reel 11 along the rotation axis Y.

[0083] Such a scan window F is operatively generated by software level operating on the sensor, limiting the reading of the sensor to a given reading height H.

[0084] Preferably, at software level, the method operates the sensor 311 of the profiler 31 by limiting the reading of the sensor itself in the window F also to a given reading depth D in the radial direction.

[0085] In more detail, this scanning window F is moved by software along the height H1 of the reel parallel to the axis of rotation Y, so that it can follow the coil being formed at each additional turn; the sensor 311 remains fixed. In this way, vibrations on the profiler 31 and the mechanical complexity of moving it are avoided.

[0086] Operably, by this means, the scan can be focused on the generating area of ​​the coil, avoiding possible interference caused by light reflected from other parts of the coil or imperfections in the coil itself.

[0087] Preferably, the at least one laser triangulation profiler 31 is configured to update the position of the scanning window with a delay between 10 and 50 ms.

[0088] Preferably, the at least one laser triangulation profiler 31 has a minimum scanning frequency of 300 Hz.

[0089] According to the present invention, the winding system 1 further includes a processing and computing unit 200, which is configured to feedback adjust the translation speed Vt of the distributor 13 based on the surface profile of the coil of the rolled product detected by the profiler 31 at each additional turn, so as to minimize the difference between actual operating parameters and the same operating parameters, wherein the actual operating parameters are calculated based on the profile of the formed coil detected by the profiler 31, and the same operating parameters are calculated based on theoretical data related to the predetermined ideal winding of the coil.

[0090] Therefore, the rolled product winding system 1 according to the present invention allows correct winding of the coil to be achieved easily and reliably.

[0091] Furthermore, the rolled product winding system 1 according to the invention is easy to manufacture or implement.

[0092] Preferably, the actual operating parameter calculated based on the profile of the formed coil detected by the profiler 31 at each additional turn is:

[0093] - the actual height Hr of the nth layer of the coil formed at each further increase of a turn relative to one of the two opposite axial ends of the winding shaft, or

[0094] - The actual growth rate Vgr of the nth layer with each further increase of a turn.

[0095] In more detail, Figure 7 and Figure 8As shown, the actual height Hr of the nth layer of the coil formed in each further increased turn corresponds to the position Yc of the height of the last increased turn.

[0096] The actual growth rate Vgr of each n-th layer is defined as the linear speed at which the height H1 / Yc of the n-th layer increases parallel to the rotation axis Y each time a further turn is added.

[0097] Fig.11 A graph illustrating the variation of the height position of each turn of the nth layer with time is shown; in this example, the trend is linear; the growth rate is defined by the angular coefficient m of the line. The processing and calculation unit 200 calculates the actual growth rate Vgr by relating the position Yc of each turn to time, thus generating Fig.11 The graph shown.

[0098] The actual growth rate Vgr of each nth layer changes direction according to the growth direction of the layer (upward or downward).

[0099] According to a preferred embodiment of the invention, the predetermined winding program is intended to feedback adjust the translation speed Vt of the dispenser so that the actual height Hr is substantially equal to the theoretical height Ht of the nth layer of the coil formed at each further increase of a turn.

[0100] In an ideally wound coil, the turns are in contact with each other; therefore, there is no space between the turns. The theoretical height Ht of the nth layer (usually a coil) can then be calculated as the sum of the diameters of a number of wound turns; in this operation, reference must be made to the diameters of the turns along the same line parallel to the axis of rotation Y. Thus, operatively, the theoretical height Ht can be calculated as a function of the reel height based on the previously obtained values ​​of the rolled product diameter available to the processing and calculation unit 200.

[0101] Typically, the rolled material P has a variable cross-sectional area, since it is subject to small diameter variations determined by the rolling process located upstream (wear, etc.). Therefore, the diameter of the rolled material is not constant. This variability affects the formation of the coil.

[0102] As will be discussed later, when calculating the theoretical height Ht, the calculation can be simplified by assuming that the diameter of the rolled material P is constant and equal to the nominal diameter.

[0103] Alternatively, in order to ensure greater accuracy when calculating the theoretical height, the diameter of the rolled product progressively fed to the winding system 1 can be measured in real time.

[0104] According to another preferred embodiment of the present invention, the predetermined winding program is intended to feedback adjust the translation speed Vt of the dispenser so that the travel speed of the dispenser is substantially equal to the actual growth rate Vgr of each nth layer when each further increase in coils occurs, so as to prevent the dispenser 13 from being before and / or after the formed coils, thereby avoiding defects on the coils.

[0105] According to a preferred embodiment of the present invention, the aforementioned detection device further comprises an online measuring instrument 32 for the diameter of the rolled product.

[0106] In more detail, Figure 3 As shown, the measuring instrument 32 is suitable for continuously measuring the diameter of the rolled product D and is arranged upstream of the distributor 13 along the feed line 100 of the rolled product P. The processing and calculation unit 200 is configured to use the diameter of the rolled product measured by the measuring instrument 32 as the diameter value of the rolled product.

[0107] Advantageously, the processing and calculation unit 200 is configured to associate a corresponding detection time with each diameter measurement.Thus, knowing the linear feed speed of the rolled product, it is possible to associate each diameter measurement with a specific portion of the rolled product.

[0108] According to such a preferred embodiment, the aforementioned predetermined reference operating parameters that can be stored by the control and command unit 20 include:

[0109] - the linear speed VP of the rolled product along the feed line of the rolled product itself;

[0110] - reel diameter D1;

[0111] - Reel height H1.

[0112] Operably, as will be described in detail below, with the above three predetermined operating parameters as input, as well as the rolled product diameter value obtained in real time, the processing and calculation unit 200 can calculate the rotation speed Vr of the reel 11 and the translation speed Vt of the dispenser 13.

[0113] According to an alternative embodiment of the invention, no online measuring instrument 32 of the rolled product diameter may be provided. In this case, the processing and calculation unit 200 is configured to use a preset value storable by the control and command unit 20 as the rolled product diameter value.

[0114] According to such an alternative embodiment, the aforementioned predetermined reference operating parameters that may be stored by the control and command unit 20 include at least:

[0115] - the linear speed VP of the rolled product along the feed line of the rolled product itself;

[0116] - reel diameter D1;

[0117] - reel height H1; and

[0118] - Nominal diameter φP of the rolled product.

[0119] Operationally, as will be described in detail below, having the above four predetermined operating parameters as input, the processing and calculation unit 200 can calculate the rotation speed Vr of the reel 11 and the translation speed Vt of the dispenser 13.

[0120] Preferably, for each nth layer in the formed coil, the processing and calculation unit 200 is configured to initialize the translation speed Vt of the dispenser to a theoretical translation speed Vtt, which is calculated according to:

[0121] - the formation time Tfs of the turns in the nth layer;

[0122] - The number of turns Ns in the nth layer.

[0123] In more detail, the theoretical translation speed Vtt is calculated by dividing the height H1 of the coil by the formation time Tfl of the layer, according to the formula: Vtt=H1 / Tfl.

[0124] Furthermore, the layer formation time Tfl is calculated by relating the turn formation time Tfs to the nth diameter and the number of turns Ns that can be accommodated on the coil layer, according to the formula: Tfl = Tfs*Ns.

[0125] In order to calculate the number of coils Ns located within the coil height H1, it is necessary to know the diameter φP (nominal or actual) of the rolled product and the coil height H1; calculate according to the following formula: Ns = H1 / φP.

[0126] In order to calculate the formation time Tfs of the turn at the nth diameter, it is necessary to know the value of the product winding circumference Cn=Dn*π (where Dn represents the diameter of the nth layer), and use the input value of the product line speed VP, according to the following formula: Tfs=Cn / VP.

[0127] Furthermore, if a preset nominal value is used for the diameter φP of the rolled product, the diameter Dn of the nth layer is calculated as Dn=D1+2*φP*Nln, where Nln represents the number of nth layers including the nth layer that have been formed.

[0128] If the diameter φP of the rolled product uses a real value, the diameter Dn of the nth layer is calculated as Dn=D1+∑[(2*φP1)+...+(2*φPn)].

[0129] A calculation example is given, assuming the following values ​​for the four reference parameters: VP = 35 m / s; D1 = 900 mm; H1 = 900 mm; φP = 10 mm (nominal value). The calculation relates to the nth layer in the formed coil.

[0130] The method starts with calculating the theoretical translation velocity Vtt: Vtt = H1 / Tfl.

[0131] Assume Tfl = Tfs*Ns, where:

[0132] Ns=H1 / φP.

[0133] Tfs=Cn / VP, and Cn=Dn*π, where Dn=D1+2*φP*Nln.

[0134] Assuming Nln=2, then Dn=900+2*10*2=940mm, so Cn=940*π=2953mm. It can be seen that:

[0135] Tfs=Cn / Vp=2.953 / 35=0.084s

[0136] Ns = 900 / 10 = 90

[0137] Tfl=Tfs*Ns=0.084*90=7.56s.

[0138] In summary, the theoretical translation speed of the nth layer distributor Vtt = H1 / Tfl = 900 / 7.56 = 119 mm / s

[0139] After the translation speed Vt is initialized with the value Vtt, the translation speed Vt of the dispenser is adjusted according to two options feedback.

[0140] Option 1: Adjust Vt so that the actual height Hr is substantially equal to the theoretical height Ht of the nth layer of the coil formed with each further increase in turn. Fig.12 and Fig.13 As shown, the adjustment standards are as follows:

[0141] If Hr is less than Ht, Vt must be reduced;

[0142] If Hr is greater than Ht, then Vt must be increased.

[0143] Operationally, to ensure correct coil formation, the rolled product must be wound on the reel within predetermined tolerances in an orientation substantially perpendicular to the reel's axis of rotation Y. This occurs when the product supply outlet 14 of the dispenser 13 is aligned with the instantaneous winding point W. This is verified if Hr substantially coincides with Ht.

[0144] More specifically, if the actual height Hr is less than the theoretical height Ht (e.g. Fig.12 As shown), the distributor 13 has passed the instantaneous winding point W; therefore, the speed of the distributor must be reduced so that the rolled product is again positioned parallel to the distributor outlet (without considering the coefficient K).

[0145] If the actual height Hr is greater than the theoretical height Ht (such as Fig.13 As shown), the distributor 13 is retracted from the instantaneous winding point W; therefore, the speed of the distributor must be increased so that the rolled product is again positioned parallel to the distributor outlet (without considering the coefficient K).

[0146] Option 2: Adjust the translation speed of the distributor to be substantially equal to the actual growth rate Vgr of each nth layer with each further additional turn.

[0147] Advantageously, some of the calculation parameters can be modified by introducing a correction factor K, which allows the coil winding characteristics to be varied according to specific requirements. In particular, the correction parameter K can be used to vary the number of turns that remain within the coil height.

[0148] Advantageously, the translation speed Vt of the dispenser can also be varied with the theoretical correction parameter K to achieve a specific coil winding effect by keeping the dispenser further retracted from the last wound turn.

[0149] Advantageously, for each nth layer of the coil formed, the processing and calculation unit 200 is configured to adjust the rotation speed Vr of the reel according to:

[0150] - the linear speed VP of the rolled product along the feed line of the rolled product itself;

[0151] - The diameter of the winding axis D1 or the diameter Dn of the n-1th layer of the formed coil.

[0152] In more detail, the rotation speed Vr of the reel is calculated by the formula Vr=(60*VPa) / (2*π), where VPa is the angular velocity of the product at a given nth diameter, expressed in rad / s, and is calculated as VPa=VP(Dn / 2), and VP is the speed of the rolled product (tangential / linear).

[0153] A calculation example is given, assuming the values ​​of VP and DN are as follows: VP = 35m / s; Dn = 940mm (assuming Nln = 2). So VPa = 35 / (0.940 / 2) = 74.46rad / s. Therefore, Vr = (60*VPa) / (2*π) = (60*74.96) / (2*π) = 711rpm.

[0154] A rolled product winding method according to the winding system 1 of the present invention will now be described.

[0155] The description of the system 1 applies to the winding method to be described below.

[0156] The method according to the present invention comprises the following steps:

[0157] a) continuously detecting the surface profile of the coil of the rolled product at each additional turn by means of said profilometer 31 oriented relative to said reel so as to scan the coil surface in a position angularly offset about the axis of rotation Y relative to said instantaneous winding point of the rolled product,

[0158] b) feedback adjustment of the translation speed Vt of the dispenser at each additional turn in order to minimize the difference between actual operating parameters calculated based on the profile of the formed coil detected by the profiler 31 and the same operating parameters calculated based on theoretical data related to a predetermined ideal winding of the coil.

[0159] Preferably, the actual operating parameter calculated based on the profile of the formed coil detected by the profiler 31 at each additional turn is:

[0160] - the actual height Hr of the nth layer of the coil formed at each further increase of a turn relative to one of the two opposite axial ends of the winding shaft, or

[0161] - The actual growth rate Vgr of the nth layer with each further increase of a turn.

[0162] Advantageously, the translation speed Vt of the distributor can be adjusted by feedback so that the actual height Hr is substantially equal to the theoretical height Ht of the nth layer of the coil formed at each additional turn. The theoretical height Ht is calculated based on the rolled product diameter value obtained in advance by the processing and calculation unit 200 according to the reel height.

[0163] Alternatively, the travel speed Vt of the dispenser may be feedback-regulated so that the translation speed Vt of the dispenser is substantially equal to the actual growth rate Vgr of each nth layer with each further increase of a turn.

[0164] Advantageously, the laser triangulation profiler 31 is suitable for detecting, for each turn, the radial distance from the axis of rotation Y of the reel and the height position along this axis of rotation Y.

[0165] The value φP of the rolled product diameter can be obtained by continuous measurement of the rolled product P by an online measuring instrument 32 placed along the rolled product feed line upstream of the distributor 13. Each diameter measurement is associated with its respective detection time.

[0166] In this case, preferably, the retrospective adjustment of the translation speed Vt of the dispenser uses predetermined reference operating parameters that can be stored by said control and command unit 20 and that include:

[0167] - the linear speed of the rolled product along the feed line of the rolled product itself;

[0168] - reel diameter;

[0169] - Scroll height.

[0170] Optionally, the diameter value φP of the rolled product is a preset nominal value.

[0171] In this case, preferably, the retrospective adjustment of the translation speed Vt of the dispenser uses predetermined reference operating parameters that can be stored by said control and command unit 20 and that include:

[0172] - the linear speed of the rolled product along the feed line of the rolled product itself;

[0173] - reel diameter;

[0174] - reel height; and

[0175] - Diameter of the rolled product.

[0176] Advantageously, for each nth layer in the coil formed, the translation speed Vt of the dispenser is initialized to a theoretical translation speed calculated according to:

[0177] - the winding time of one turn in the nth layer;

[0178] -The number of turns in the nth layer.

[0179] Advantageously, for each nth layer in the coil formed, the rotation speed of the winding shaft is adjusted according to:

[0180] - the linear speed of the rolled product along the feed line of the rolled product itself;

[0181] - The diameter of the winding shaft or the diameter of the n-1th layer of the formed coil.

[0182] The advantages provided by the present invention highlighted previously in the description of the winding system 1 also apply to the winding method and, for the sake of brevity, will not be repeated here.

[0183] The present invention provides numerous advantages, some of which have already been described.

[0184] Therefore, the rolled product winding system 1 according to the present invention allows correct winding of the coil to be easily and reliably achieved.

[0185] Furthermore, the rolled product winding system 1 according to the invention is easy to manufacture or implement.

[0186] Therefore, the present invention thus designed achieves the set objects.

[0187] Obviously, in practice, it may also adopt shapes and structures different from those disclosed above without departing from the protection scope of the present invention.

[0188] Moreover, all the details may be replaced by technically equivalent elements and any dimensions, shapes and materials may be used as desired.

Claims

1. A rolling product (P) winding system (1), comprising: - a rotating winder (10) comprising: - a winding reel (11), and - reel rotating means (12) suitable for rotating said reel (11) around an axis of rotation (Y), - a distributor (13) adapted to guide the rolled product towards the reel position at the instantaneous winding point and provided with a product feed outlet (14); - distributor translation means (15) adapted to move the distributor (13) relative to the reel (11) so that the product feed outlet (14) performs an alternating translation movement of the reel parallel to the axis of rotation (Y) in order to distribute the rolled product on the reel and to vary over time the instantaneous winding point of the rolled product on the reel and the coil formed, a control and command unit (20) configured to control the rotation means (12) and the translation means (15) in a coordinated manner according to a predetermined winding program, the predetermined winding program being based on predetermined reference operating parameters and operating parameters that can be stored by the control and command unit (20), the operating parameters being able to be acquired in real time during winding by the control and command unit (20) through detection means (30) provided in the winding system (1), Characterized in that the detection means (30) comprises at least one laser triangulation profiler (31), which is arranged substantially at a position diametrically opposite to the distributor (13) relative to the reel (11) and is suitable for continuously detecting the surface profile of the coil of the rolled product at each additional turn, wherein the profiler (31) is oriented relative to the reel so as to scan the coil surface at a position angularly offset about the axis of rotation (Y) relative to the instantaneous winding point of the rolled product, Furthermore, it is characterized in that the winding system includes a processing and computing unit (200), which is configured to feedback adjust the translation speed of the distributor based on the surface profile of the coil of the rolled product detected by the profiler (32) at each additional turn so as to minimize the difference between actual operating parameters and the same operating parameters, wherein the actual operating parameters are calculated based on the profile of the formed coil detected by the profiler (31), and the same operating parameters are calculated based on theoretical data related to the predetermined ideal winding of the coil.

2. The winding system according to claim 1, wherein: The actual operating parameter calculated based on the profile of the formed coil detected by the profiler (31) when each turn is added is: - the actual height (Hr) of the nth layer of the coil formed at each further increase of a turn relative to one of the two opposite axial ends of the winding shaft, or - The actual growth rate (Vgr) of each nth layer with each further increase of a turn.

3. The winding system according to claim 2, wherein: The predetermined winding program is intended to feedback adjust the translation speed of the dispenser so that: - or the actual height (Hr) is substantially equal to the theoretical height (Ht) of the nth layer of the coil formed at each further increase of a turn, the theoretical height (Ht) being calculated based on the diameter value of the rolled product obtained in advance by the processing and calculation unit (200) according to the reel height, - or the speed of translation of the distributor is substantially equal to the actual rate of increase (Vgr) of each nth layer at each further additional turn.

4. A winding system according to any one of the preceding claims, wherein: The orientation position of the profilometer (31) for scanning the coil surface relative to the reel is angularly offset about the rotation axis (Y) by an angle between 75° and 105° relative to the instantaneous winding point of the rolled product.

5. A winding system according to any one of the preceding claims, wherein: The at least one laser triangulation profiler (31) is adapted to detect, for each turn, a radial distance from the axis of rotation (Y) of the reel and a height position along the axis of rotation (Y).

6. A winding system according to any one of the preceding claims, wherein: The at least one laser triangulation profiler (31) can be electronically managed so as to scan within a scanning window (F), the height (H) of which is lower than the height of the reel (11) along the rotation axis (Y), preferably, the scanning window (F) can be moved parallel to the rotation axis (Y) so as to follow the coil formed with each additional turn.

7. The winding system according to claim 6, wherein: The at least one laser triangulation profiler (31) is configured to update the position of the scanning window (F) with a delay between 10 and 50 ms.

8. A winding system according to any one of the preceding claims, wherein: The at least one laser triangulation profiler (31) has a minimum scanning frequency of 300 Hz.

9. A winding system according to any one of the preceding claims, wherein: The detection device (30) further includes an online measuring instrument (32) for measuring the diameter of the rolled product, the measuring instrument being suitable for continuously measuring the diameter (φP) of the rolled product and being arranged upstream of the distributor (13) along the supply line of the rolled product, wherein the processing and calculation unit (200) is configured to use the measured value of the diameter of the rolled product by the measuring instrument (31) as the diameter value of the rolled product.

10. The winding system according to claim 9, wherein: The processing and computing unit (200) is configured to associate a corresponding detection time with each diameter measurement value.

11. The winding system according to claim 9 or 10, wherein: The predetermined reference operating parameters that can be stored by the control and command unit (20) include: - the linear speed of the rolled product along the feed line of the rolled product itself; - reel diameter; - Scroll height.

12. The winding system according to any one of claims 1 to 8, wherein: The processing and calculation unit (20) is configured to use a preset value storable by the control and command unit (20) as a diameter value of the rolled product.

13. The winding system according to claim 12, wherein: The predetermined reference operating parameters that can be stored by the control and command unit (20) include at least: - the linear speed of the rolled product along the feed line of the rolled product itself; - reel diameter; - reel height; and - Diameter of the rolled product.

14. A winding system according to any one of the preceding claims, wherein: For each nth layer in the formed coil, the processing and calculation unit (200) is configured to initialize the translation speed of the dispenser to a theoretical translation speed, the theoretical translation speed being calculated according to: - the winding time of one turn in the nth layer; -The number of turns in the nth layer.

15. A winding system according to any one of the preceding claims, wherein: For each nth layer in the formed coil, the processing and computing unit (200) is configured to adjust the rotation speed of the reel according to: - the linear speed of the rolled product along the feed line of the rolled product itself; - Diameter of the n-1th layer of the bobbin or formed coil.

16. A method (1) for winding a rolled product (P), wherein: The product (P) is wound into a coil by a winding system (1) according to any one of the preceding claims, the method comprising the following steps: a) continuously detecting the surface profile of the coil of the rolled product at each additional turn by means of said profilometer (31) oriented relative to said reel so as to scan the coil surface in a position angularly offset about the axis of rotation (Y) relative to said instantaneous winding point of the rolled product, b) feedback adjustment of the translation speed (Vt) of the dispenser at each additional turn so as to minimize the difference between actual operating parameters calculated based on the profile of the formed coil detected by the profiler (31) and the same operating parameters calculated based on theoretical data related to a predetermined ideal winding of the coil.

17. The winding method according to claim 16, wherein: The actual operating parameter calculated based on the profile of the formed coil detected by the profile measuring instrument (31) when each turn is added is: - the actual height (Hr) of the nth layer of the coil formed at each further increase of a turn relative to one of the two opposite axial ends of the winding shaft, or - Actual growth rate (Vgr) of the nth layer with each further turn.

18. The winding method according to claim 17, wherein: The translation speed (Vt) of the dispenser is feedback-regulated such that: - or the actual height (Hr) is substantially equal to the theoretical height (Ht) of the nth layer of the coil formed at each further increase of a turn, the theoretical height (Ht) being calculated based on the diameter value of the rolled product pre-acquired by the processing and calculation unit (200) according to the reel height, - or the speed of translation of the distributor is substantially equal to the actual rate of increase (Vgr) of each nth layer with each further additional turn.

19. The winding method according to any one of claims 16 to 18, wherein: The at least one laser triangulation profiler (31) is adapted to detect, for each turn, a radial distance from the axis of rotation (Y) of the winding shaft and a height position along the axis of rotation (Y).

20. The winding method according to claim 18, wherein: The diameter value (φP) of the rolled product is obtained by continuously measuring the rolled product by an online measuring instrument (32), which is arranged upstream of the distributor (13) along the supply line of the rolled product, wherein each diameter measurement value is associated with a corresponding detection time.

21. The winding method according to claim 20, wherein: The retroactive adjustment of the dispenser translation speed (Vt) uses predetermined reference operating parameters that can be stored by the control and command unit (20), the parameters comprising: - the linear speed of the rolled product along the feed line of the rolled product itself; - reel diameter; - Scroll height.

22. The winding method according to claim 18, wherein: The diameter value (φP) of the rolled product is a preset nominal value.

23. The winding method according to claim 22, wherein: The retroactive adjustment of the dispenser translation speed (Vt) uses predetermined reference operating parameters that can be stored by the control and command unit (20), the parameters comprising: - the linear speed of the rolled product along the feed line of the rolled product itself; - reel diameter; - reel height; and - Diameter of the rolled product.

24. The winding method according to any one of claims 16 to 23, wherein: For each nth layer in the formed coil, the translation speed (Vt) of the dispenser is initialized to the theoretical translation speed, which is calculated according to: - the winding time of one turn in the nth layer; -The number of turns in the nth layer.

25. The winding method according to any one of claims 16 to 24, wherein: For each nth layer of coils formed, the rotation speed of the reel is adjusted according to: - the linear speed of the rolled product along the feed line of the rolled product itself; - the diameter of the n-1th layer of the reel or of the formed coil.

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