JP2021519698A - Coil winding method and system for hot rolled products - Google Patents

Abstract

The present invention is a coil winding system for hot rolled products, a rotary coiler 10 having a vertical axis Y, comprising an outer drum 11 and an inner mandrel 12 coaxial with the outer drum, the outer drum and the inner side. A coiler in which a mandrel partitions an annular gap 13 whose bottom is closed by a bottom wall 14 integrated with an outer drum and / or an inner mandrel, in which a hot-rolled product is deposited and wound into a reel. And a means 20 for transporting the hot-rolled product that enters the coiler toward the annular gap. The transport means 20 is associated with a support frame 21 that is rotatably fixed to the coiler. The system includes a transfer means 30 that deflects the hot-rolled product in the annular gap from the spiral trajectory induced by the rotation of the coiler. The transfer means is arranged downstream of the transport means with respect to the approaching motion of the hot-rolled product in the coiler, and sets the winding distance of the hot-rolled product in the radial direction R with respect to the vertical axis Y of the coiler in the annular gap. It is configured to do. The transfer means includes a transfer member 31 that comes into contact with the hot-rolled product during use, and the orientation of the transfer member 31 can be adjusted within the annular gap so as to change the setting of the winding distance in the radial direction.

Description

An object of the present invention is a coil winding system and method for hot-rolled products using a rotary coiler.

In technical terms, coil winding with a rotating coiler is known as "pouring reel" winding.

"Hot rolled products" are rods, rebars, squares, hexagons, plates, or others made of metal materials such as bronze, brass, aluminum, steel (spring steel, bearing steel, stainless steel, etc.). It means a product having a hot-formed polygonal outer shape.

Specifically, the coil winding system and method according to the present invention is applicable to a process for forming a reel of a rolled product having a cross section of less than ^{3000 mm 2 which has a particularly appreciable advantage in high speed processes.}

The reel is formed by a continuous spiral of hot rolled products with a constant cross section obtained from a continuous hot rolling process. The rolled product moves linearly at a constant speed, depending on the rolling process, to obtain the final cross section. In order to make a reel, the rolled product must be deformed into a circle.

As is well known, winding by a rotary coiler (“polling reel”) involves pushing the rolled product into a particular coiler by a feeder that imparts linear motion to the hot rolled product.

1 to 4 show an example of a coiler for a "polling reel". The coiler is indicated by A and the feeder is indicated by B.

More specifically, the coiler A is composed of an outer drum A1 and a mandrel A2 coaxially arranged inside the drum A1 to partition the inner diameter of the reel. A gap A3 having an annular cross section is formed between the drum A1 and the mandrel A2, and the rolled product is "poured" into the gap A3 to form a reel. The coiler A closes the annular gap A3 and includes a bottom A4 for collecting "poured" rolled products within the annular gap A3.

The force that presses the rolled product against the wall of the outer drum A1 of the coiler changes the direction of the rolled product and at the same time generates a radial reaction force that causes plastic deformation. The rolled product, which has continuous linear motion and constant thrust, follows the shape of the gap A3 and takes the form of a cylindrical spiral.

Further, in operation, the radial force causes friction between the rolled product and the coiler. This friction can occur in the form of sliding and associated surface wear. To avoid, or at least reduce, this phenomenon, the coiler 1 rotates itself. That is, the drum A1, the bottom A4, and the mandrel A2 rotate together.

Generally, the axis of rotation of the coiler A is vertical, and the filling of the annular gap A3 is progressively performed by "pouring" the rolled product from above.

This type of coiler is typically used for high quality hot rolled products with sections that cannot be processed by other coil winding techniques, or hot rolled products that must undergo heat treatment after winding and are overly used. It should not be formed on reels with compact coils, but conversely it is used for hot rolled products that must have a minimum free space between the coils. For example, winding on a winder reel (ie, a reel that pulls a rolled product) leads to the formation of a reel with a very compact coil that has virtually no free space.

However, in the winding of "polling reel", the quality of the final reel is not guaranteed only by the rotation of the coiler. The final product wound on a reel actually has surface defects caused by sliding or irregular deformation (elbow curve), especially in the case of hot-rolled products with a small cross section. It may happen.

In order to further limit the sliding phenomenon, especially to avoid non-uniform deformation of the rolled product, the coiler A of the "polling reel" is generally applied to the inside of the annular portion A3 between the drum A1 and the mandrel A2. It is equipped with a device C called a "spiral guide".

More specifically, as shown in FIGS. 3 and 4, the spiral guide C includes a support frame D generally made of a tubular body coaxially associated with the mandrel A2. A series of tubular bodies or roller guides C1 are fixed to the support frame D according to a vertical spiral outer shape. The support frame D does not rotate with the mandrel, but is axially movable relative to the same mandrel, as shown in FIGS. 1 and 2.

In operation, the rolled product pushed into the spiral guide C (non-rotating) is preformed, and the coil coming out of this guide is gently placed on the bottom A4 of the rotary coiler. Also in this case, rotation of the drum, mandrel, and bottom is necessary to reduce friction and prevent the rolled product from getting caught in the spiral guide C. When the coil is formed, the spiral guide C gradually rises, leaving space for the reel Q to increase in height within the annular gap A3. The rolled product feeder B, located upstream of the spiral guide, moves accordingly (as can be seen by comparing FIG. 1 and FIG. 2).

In particular, as shown in FIG. 3, in order to compensate for the displacement between the feeder B and the spiral guide C, the spiral guide is funnel-shaped to convey the rolled product entering a series of tubular bodies or roller guides C1. The guide member E of the above shall be provided.

Reel filling is defined as the ratio between the actual volume of the reel and the theoretical volume of the reel. The theoretical volume is defined as the volume of the reel where the clearance between the coils is equal to zero.

Reel filling is a property that affects the height of the reel itself before bundling. Reels that are too high are difficult to handle and are not very stable. Filling also defines the ability of the reel to be heat treated. The free space between the coils actually ensures a uniform distribution of temperature and a passage for air and cooling water to flow.

Regulate the speed of rotation of the coiler (with or without the use of spiral guides), as described below, in order to improve the surface quality of the material wound on the reel and to increase control over filling of the reel. It is known.

The rolled product has a constant linear velocity. The rotational speed of the coiler must be such that it follows the spiral winding motion of the rolled product, as described below, and depends on the linear speed of the rolled product.
ω coiler = Flame × 60 / (D × π)
Here, ω coiler indicates the rotational angular velocity of the coiler in terms of the number of revolutions per minute [rpm], Vlam is the linear velocity [m / s] of the rolled product, and D is the diameter (variable) of the annular portion A3. [M].

The annular portion A3 is configured between the innermost peripheral portion [Dmin × π] partitioned by the mandrel A2 and the outer peripheral portion [Dmax × π] partitioned by the drum A1. Therefore, the rotation speed changes according to the circumference to be filled.

Typically, the tangential velocity of the annular portion A3 on the average diameter Dmed corresponds to the linear velocity of the rolled product.

The average diameter Dmed is calculated as follows.
Dmed = Dmin + (Dmax-Dmin) / 2

Therefore, the average rotational speed ωmed of the coiler with respect to the average diameter is calculated as follows.
ωmed = Flame x 60 / (Dmed x π)

In order to increase the filling amount, a person tries to uniformly cover the entire annular portion A3.

To do this, it is necessary to increase or decrease the rotational speed of the coiler A from turn to turn in order to place the coil in a larger or smaller diameter than the previous one.

The ramp produced by the acceleration or deceleration described above follows a periodic course that changes direction for each packed bed, that is, each time the maximum or minimum speed limit is reached, as shown in FIG. This cycle is technically called "wobbling". When the rotational speed ωcoiler is maximum, the coil is wound around the mandrel A2, and conversely when it is minimum, the coil is placed on the drum A1.

By adopting a wobbling cycle for winding the coil, the formation of the coil can be controlled, and as a result, the filling amount of the reel can be increased.

However, obtaining this result by the wobbling cycle is theoretical and is based on mere geometric rules. In practice, there are some variables that affect the position of the coil, which is difficult to control.

First of all, the rolled product is moving on a curved track and is therefore subject to centrifugal force. Further, when the spiral guide is provided, the rolled product is not strictly constrained by the average bending radius of the spiral guide C. The roller guide or tubular body C1 typically has a penetration that is larger than the cross section of the rolled product. In practice, the combination of excessive accuracy and possible misalignment can deform the rolled product in an irregular manner, resulting in the rolled product getting stuck in the same guide and interfering with the process. .. In addition, the friction that occurs causes premature wear of the spiral guide. Finally, for application in the industrial field, the spiral guide C cannot be dedicated to a particular section of the rolled product. Hot rolling systems typically process different sections, and changes from one section to another can occur very often. In such cases, machine setup time should be minimized. For this reason, one attempts to cover a wide range of different sections using the same spiral guide.

Operationally, coil instability becomes more pronounced as the sections of the rolled product decrease and the speed increases. More specifically, since the coil is not tightly constrained in space, it tends to widen relative to the average bending radius of the spiral guide C, resulting in the outside of the annular portion A3, i.e. the drum A1. Accumulate near the area. Further, in the process, the spiral guide C gradually rises, so that the new coil is not deposited inside the previous coil, but is deposited on top, increasing the height of the reel.

Further, when the rotation speed of the coiler exceeds the average speed ωmed, a problematic phenomenon occurs (see FIG. 15). Since the hot-rolled product is easily deformed at a high temperature, it has to be wound around the mandrel A2 due to the excessive rotation speed, and in this case as well, the coil does not deposit in the central portion of the annular portion A3.

The result is a high reel that is very dense at the outer Dmax and inner Dmin but is substantially empty at the center and has a very low filling rate.

Therefore, in the application of coil winding of "polling reel", it is necessary to further improve the filling of the reel.

Therefore, an object of the present invention is a coil winding system for hot rolled products with a rotary coiler that can better control reel filling in order to eliminate all or part of the drawbacks of the prior art. Is to provide.

A further object of the present invention is to provide a coil winding system for hot rolled products with a rotary coiler that can be easily managed from an operational point of view.

A further object of the present invention is to provide a coil winding system for hot rolled products with rotary coilers that is easy and economical to implement.

The technical features of the invention for the purposes described above are evident in the claims provided below, the advantages of which are merely exemplary and non-limiting illustrations representing one or more embodiments. It will become clearer in the following detailed explanation given with reference to.
FIG. 1 is an overall perspective view of a conventional coil winding system with a rotating coiler in which the spiral guide is shown in an raised operating state. FIG. 2 is a diagram showing a coil winding system of FIG. 1, which is shown in an operating state in which the spiral guide is lowered. FIG. 3 is a detailed perspective view of the coil winding system of FIG. 2 with respect to a rotating coiler shown partially cut to better emphasize the interior during use. FIG. 4 is a plan view of the coiler of FIG. 3 as viewed from above, showing a state in which some parts are removed in order to better emphasize other parts. FIG. 5 is an overall perspective view of a conventional coil winding system having a rotary coiler according to a preferred embodiment of the present invention with a spiral guide, showing the spiral guide in an raised operating state. Is. FIG. 6 is a diagram showing the coil winding system of FIG. 5, which is shown in an operating state in which the spiral guide is lowered. FIG. 7 is a detailed perspective view of the coil winding system of FIG. 6 for a rotating coiler shown partially cut to better emphasize the interior during use. FIG. 8 is a plan view of the coiler of FIG. 7 as viewed from above, showing a state in which some parts are removed in order to better emphasize other parts. 9 is a side view of the components of the coiler of FIG. 7 relative to the support frame for the rolled product guide member for the rolled product spiral guide and the rolled product diverter device. be. FIG. 10 is a diagram schematically showing some operating positions of the transfer device shown in FIG. FIG. 11 is an enlarged view of FIG. 10 regarding the transfer device and the actuator of the device, and is a diagram showing some angular positions assumed by the actuator. FIG. 12 is a perspective view showing details of FIG. 9 regarding the transfer device and its actuator. FIG. 13 is a relative orthogonal side view of the components of the coiler according to an alternative embodiment of the present invention without a spiral guide with respect to a rolled product guide member and a support frame for a rolled product transfer device. .. FIG. 14 is a control diagram of a coil winding system including a rotary coiler according to a specific embodiment of the present invention. FIG. 15 is a graph comparing the time transition of the angular velocity of the coiler related to the wobbling cycle with the time transition of the positions of the transfer device and its actuator.

With reference to the accompanying drawings, the coil winding system for the hot rolled product according to the present invention is collectively shown in 1.

For simplicity, the coil winding method according to the present invention will be described after the coil winding system and will be described with reference to the coil winding system.

Subsequent specification and claims refer to the coil winding system 1 in use. Therefore, any reference to the lower or upper position, or horizontal or vertical, should be understood in that sense.

According to a general embodiment of the present invention, the coil winding system 1 is
-Rotating coiler 10 with vertical axis Y and
− Means 20 for transporting the hot-rolled product entering the rotary coiler 10 and
It has.

In particular, as shown in FIGS. 5 to 8, the rotary coiler 10 includes an outer drum 11 and an inner mandrel 12 coaxial with the outer drum. The outer drum 11 and the inner mandrel 12 partition an annular gap 13 closed at the bottom by a bottom wall 14 integral with the drum 11 and / or the mandrel 12.

In operation, the hot-rolled product is deposited (poured) in the annular gap 13 and wound in the form of a reel during use, as follows.

The mandrel 12 may be rotatably attached to the outer drum 11 or may be rotatably moved independently of the drum itself. Preferably, the bottom wall 14 is rotatably and integrally attached to the inner mandrel 12.

As schematically shown in FIGS. 1, 2, and 14, the rotary coiler 10 includes an electric means 15 configured to rotate the coiler 10.

The rotating coiler 10 is well known to those skilled in the art. Therefore, it is not explained in more detail.

As shown in FIGS. 5 and 6, a feeding device 2 is provided upstream of the coil winding system 1. The feed device 2 is designed to pull the hot-rolled product, which comes out of the rolling mill (not shown) and normally travels along a transport line consisting of the roller guides 3, toward the coiler 10. There is.

Functionally, the above-mentioned transport means 20 is configured to transport the hot-rolled product that has entered the rotary coiler 10 toward the above-mentioned annular gap 13.

Preferably, the transport means described above is composed of a funnel-shaped guide member 20 intended to compensate for the displacement between the feed device 2 described above and the annular gap 13 of the coiler 10.

Specifically, the funnel-shaped guide member 20 described above imposes a trajectory on the hot-rolled product toward the annular gap 13 forming a predetermined inclination angle toward the bottom wall 14 with respect to the horizontal reference plane. It is configured.

As shown in the accompanying drawings, the transport means 20 is associated with a support frame 21 that is rotatably fixed to the coiler 10.

Advantageously, the support frame 21 is movable with respect to the coiler 10, and in particular, it can be moved away from the coiler 10 to remove the reel from the annular gap 13 at the end of the rolling product winding operation. It is possible. For this purpose, the coil winding system 1 includes means 50 for moving the support frame 21 described above relative to the coiler 10.

Advantageously, the support frame 21 described above can move coaxially along the rotation axis Y in the direction perpendicular to the coiler 10, as shown in FIGS. 5 and 6.

In particular, as shown in FIG. 7, the aforementioned support frame 21 is axially hollow and is configured to at least partially insert itself inside the aforementioned annular gap 13 of the coiler 10. The inner mandrel 12 is coaxially received and can freely rotate about the above-mentioned axis Y.

In the support frame 21, it is possible to distinguish between the lower portion 21a intended to be inserted into the annular gap 13 during use and the upper portion 21b intended to remain outside the annular gap 13 during use.

According to the present invention, the coil winding system 1 includes means 30 for transferring the hot-rolled product from the spiral trajectory induced by the rotation of the coiler 10 into the above-mentioned annular gap 13.

Such a transfer means 30 is arranged on the downstream side of the above-mentioned transport means 20 with respect to the movement of the rolled product entering the coiler 1, and is a hot rolled product with respect to the vertical axis Y of the coiler in the annular gap 13. It is configured to set the winding distance R in the radial direction of.

More specifically, as shown in the attached drawings, the transfer means 30 includes a transfer member 31 that comes into contact with the hot-rolled product during use, and its orientation within the annular gap 13 is radial winding. It can be adjusted to change the setting of the distance R.

According to the present invention, the hot-rolled product can be guided into the annular gap in a controllable manner and, if necessary, modified by affecting the spiral trajectory induced by the rotation of the coiler 10. Operationally, in practice, the hot-rolled product is oriented so that the transfer member 31 is oriented at least near the same transfer member 31 and has a predetermined radial distance R with respect to the vertical axis Y of the coiler. Force. Thereby, the spiral trajectory is adjusted to adjust the formation of the coil S of the reel Q.

Since the transfer member 31 can adjust its orientation within the annular gap 13, it is possible to better control the filling of the reel Q in the rotary coiler 10 during formation.

Preferably, as follows, the orientation of the transfer member 31 changes over time during reel formation, thereby performing real-time control of the coil S in the coiler 10. Such a real-time control mode is implemented via an automated control system.

More specifically, this real-time control mode may be associated with the control logic of reel formation via the wobbling cycle. In this case, as shown in FIG. 15, even if the control logic provides the orientation of the transfer member 31 so as to change in time in synchronization with the acceleration-deceleration cycle of the winding machine 10 set by the wobbling cycle. good. This allows for-at least partial-control of operating variables that affect the position of the coil and escape control through a simple wobbling cycle, thus increasing control over coil formation. .. More specifically, it is possible to cancel the influence of centrifugal force on the formation of the reel coil.

The real-time adjustment mode described above may be performed independently of the execution of the control logic of the wobbling cycle. In other words, the real-time control of the transfer member 31 may be superseded by the implementation of the wobbling cycle. According to the present invention, for each coil S formed, it is possible to set the radial winding distance R of the hot-rolled product with respect to the vertical axis Y of the coiler within the annular gap 13.

Alternatively, the transfer member 31 may be adjusted in a fixed orientation during reel formation. This orientation may be selected, for example, as a suitable eclectic position to facilitate filling of the rolled product in the central region of the annular gap 13, thereby at least partially towards the outer drum 11. The natural tendency of filling towards the inner mandrel 12 as well as filling may be modified. Such a fixed orientation is modified to facilitate filling towards the mandrel or drum when operating conditions change, for example when rotation of the coiler tends to avoid filling towards the mandrel or drum. May be done. This fixed setting adjustment mode is operationally easy to perform and may be manually performed by the operator before or during the coil winding process.

Operationally, this fixed setting adjustment mode may be applied to hot rolled products to receive lower centrifugal force, especially at low speeds, specifically at speeds not exceeding 10 m / s.

Preferably, the transfer means 30 described above is associated with the support frame 21, especially as shown in FIGS. 5, 7, 9, and 13.

More specifically, the transfer means 30 described above is associated with the lower portion 21a described above of the support frame 21. The lower portion 21a is intended to be inserted into the annular gap 13 during use.

Preferably, in particular, as shown in FIGS. 8, 9, 10 and 13, the transfer member 31 described above defines an internal through-seat portion 32 for a hot-rolled product, and the internal through-seat portion 32. Ends with an outlet portion 33 arranged within the annular gap 13 at a distance R in the radial direction with respect to the vertical axis Y of the coiler 10 during use.

In particular, as shown in FIGS. 10 and 11, the above-mentioned transfer member 31 is oriented with respect to the annular gap 13 between the outer drum 11 and the inner mandrel 12, and the above-mentioned outlet portion in the annular gap 13. The radial distance R of 33 can be changed, and as a result, the radial winding distance R of the hot-rolled product L coming out of the transfer member 31 during use can be changed with respect to the vertical axis Y. As a result, the hot-rolled product L can be deflected from the spiral trajectory induced by the rotation of the coiler 10, and the formation of the individual coils S can be adjusted.

In operation, the transfer member 31 does not have a function of deforming the hot-rolled product L. This function is actually performed by the coiler 10 and a possible spiral guide (if provided, as shown below). As already mentioned, the main function of the transfer member 31 is to locally deflect the hot-rolled product L from the spiral trajectory induced by the rotation of the coiler 10. Therefore, it is not necessary to engage the hot-rolled product over a long distance (as the spiral guide must) with the transfer member 31 to perform this function. On the contrary, in order to avoid the adjustment interference induced by the sliding of the hot-rolled product L and to more easily adjust the orientation of the transfer member 31 in the annular gap 13, the transfer member 31 is structurally structured. It is preferred that the transfer member 31 engage the hot-rolled product for as little distance as possible to be compatible with the requirements.

Preferably, depending on the characteristics of the hot-rolled product to be wound, the transfer member 31 may have an extension corresponding to an arc of circumference corresponding to an angle between 5 ° and 45 °. More preferably, the angle is between 5 ° and 20 °.

Advantageously, the transfer has a transfer seat 32 that is more suitable for the cross section of the hot-rolled product L to be processed because the size of the transfer member 31 is smaller and the friction generated thereby is smaller compared to the spiral guide. The member 31 can be used. This makes it possible to orient the hot-rolled product L more accurately and force the coil to take a more accurate radial position within the annular gap 13.

Advantageously, the small size of the transfer member 31 relative to the spiral guide makes it easy to replace the transfer member 31 in the event of wear or when changing the format of the hot-rolled product wound on a reel. Become.

Preferably, the transfer member 31 described above is composed of a linear or curved tubular body. The hollow inner section of the tubular body forms the aforementioned inner through seat 32 for hot rolled products.

Alternatively, the transfer member described above may be composed of a roller guide. The through openings between the rollers form the aforementioned internal through seat 32 for hot rolled products.

According to a preferred embodiment shown in FIGS. 5 to 10, the coil winding system 1 may include a spiral guide 60 associated with the support frame 21 on the downstream side of the transport means 20.

Functionally, the spiral guide 60 (including a series of static guides or roller guides) preferably has a predetermined mean radius of curvature corresponding to the radius of the central circumference of the annular gap 13 described above. It is suitable for imparting a curvature having a radius to a hot-rolled product. The spiral guide 60 imposes a cylindrical spiral trajectory on the hot rolled product. Therefore, the spiral guide 60 imposes on the hot-rolled product a trajectory that forms a predetermined tilt angle with respect to the bottom wall 14 with respect to the horizontal reference plane.

In this case, the transfer means 30 is arranged on the downstream side of the spiral guide 60 described above, receives the hot-rolled product outside the spiral guide 60, and transfers the already deformed hot-rolled product in a controlled manner. It has become like.

In other words, the spiral guide 60 is arranged between the transport means 20 and the transfer means 30.

Preferably, in the presence of the spiral guide 60 on the upstream side of the transfer means, the internal through-seat 32 for the hot-rolled product in the transfer member 31 heats up as the hot-rolled product exits the spiral guide. Define a curved trajectory to follow the curvature already assumed by the interrolled product. More specifically, the curved orbit defined by the transfer member 31 is a circular arc having a radius of curvature substantially equal to the predefined average radius of curvature of the spiral guide 60 described above.

Advantageously, as shown in FIGS. 7 and 9, the spiral guide 60 extends over the entire height of the support frame 21 between the upper portion 21b and the lower portion 21a.

In operation, the spiral guide 60 has a function associated with the hot-rolled product when the hot-rolled product is deposited in the annular gap 13. For this purpose, the spiral guide 60, which is moved by the support frame 21, is initially fully inserted into the annular gap 13 close to the bottom wall 14, after which the reel can extend in the height direction. Gradually rise upwards as possible. By gradually raising the spiral guide 60, a constant distance is maintained between the outlet portion of the spiral guide 60 and the last coil deposited on the forming reel. The transfer member 31 is integral with the support frame 21 and the associated spiral guide 60, allowing control of the deposition of new coils in the vicinity of the reel to be formed.

Preferably, the spiral guide solution is ^{used for hot rolled products with a cross section of less than 1,300 mm 2} (corresponding to a rod with a diameter of 40 mm).

According to another embodiment shown in FIG. 13, the coil winding system 1 may not include the spiral guide 60.

In this case, the transfer means 30 described above is arranged immediately downstream of the transfer means 20 without interposing a spiral guide.

Functionally, in the absence of a spiral guide, the curvature of the hot-rolled product is entirely left to the action of the coiler, which is determined by the rotational motion. The transfer member 31 corrects the spiral trajectory by forcibly moving the hot-rolled product to an accurate radial position before the hot-rolled product is deformed.

In the absence of a spiral guide, the internal through-seat portion 32 for the hot-rolled product of the transfer member 31 may define a curved or straight track.

In contrast to the case where the spiral guide is provided, when there is no spiral guide and the heights of the coilers 10 are equal, the support frame 21 does not reach near the bottom wall 14 and the annular gap 13 It may have a low extension in the height direction as it is sufficient to partially enter the helix.

Preferably, the solution without a spiral guide is applied for hot rolled products having a cross section not less than ^{1,300 mm 2.}

According to the embodiments shown in FIGS. 7, 8, 9, 12, and 13, the transfer member 31 is pivotally supported by the support frame 21 about the vertical swivel axis Z, and the radius of the outlet portion 33. It may be rotated about the vertical swivel axis Z so as to change the distance R in the direction.

Preferably, the above-mentioned vertical swivel axis Z passes on the circumference of the annular gap 13, particularly the central portion of the annular gap 13.

In particular, as shown in FIGS. 9 and 13, the transfer member 31 imposes on the hot-rolled product a trajectory in the annular gap 13 that forms an inclination angle β towards the bottom wall 14 with respect to the horizontal reference plane on the vertical projection plane. It is oriented like this.

Preferably, the tilt angle β described above corresponds to the tilt angle imposed on the hot-rolled product L by the transport means 20 and the spiral guide 60 (if provided).

Advantageously, the transfer member 31 described above may be associated with the support frame 21 so that it can be rotated about the horizontal swivel axis X to change the tilt angle β described above. The tilt angle β may be adjusted manually or automatically.

Advantageously, the coil winding system 1 includes means 40 for adjusting the orientation of the transfer member 31 within the annular gap 13.

Specifically, the adjustment means 40 described above includes an actuator 41 directly or indirectly connected to the transfer member 31 described above via a transmission device 42.

The actuator 41 may be of any type suitable for the intended purpose. More specifically, it may be composed of an electric motor (as shown in the attached figure), or may be composed of a pneumatic, hydraulic, or electric linear actuator. Alternatively, the actuator may consist of a lever that can be manually operated by the operator.

Preferably, the actuator 41 is associated with an upper portion 21b of a support frame 21 that is intended to remain outside the annular gap 13 in use and via a transmission device 42 (a lower portion of the support frame 21). It is connected to a transfer member 31 (associated with 21a). This maintains the integrity of the actuator 41 and protects it from the heat released into the annular gap 13.

According to a preferred embodiment specifically shown in FIGS. 7 and 12, the transfer member 31 (particularly composed of a tubular body) is indirectly associated with the support frame 21 via the support structure 34. .. The support structure 34 is pivotally supported by the lower portion 21a of the frame 21 so as to rotate about the vertical swivel shaft Z described above. The transfer member 31 may be pivotally supported by the support structure 34 so as to rotate about the horizontal swivel axis X described above so as to change the inclination angle β.

More specifically, the support structure 34 is directly or indirectly connected to the eccentric shaft 36 via the connecting rod 35. The eccentric shaft 36 may be rotationally driven by the above-mentioned actuator 41 preferably composed of an electric motor. In a particular example, the eccentric shaft 36 and the connecting rod 35 (if any) form the transmission device 42 described above.

In operation, as shown in FIGS. 11 and 15, the angular position of the transfer member 31 with respect to the axis Z can be controlled by controlling the angular position of the eccentric shaft 36 by the actuator 41. Each angular position of the transfer member 31 with respect to the axis Z corresponds to a different radial distance R (R0, R1, R2) of the exit portion 33 and corresponds to a different orientation of the transfer member 31 within the annular gap 13.

In particular, according to a preferred embodiment of the present invention shown in FIG. 14, the adjusting means 40 includes an electronic control unit 100. The electronic control unit 100 is connected to the actuator 41 described above and is programmed to control the intervention of the actuator 41 according to a predetermined adjustment logic for the orientation of the transfer member 31. The electronic control unit 100 includes a user interface 102.

Advantageously, the predetermined adjustment logic described above provides that the orientation of the transfer member 31 changes over time.

Preferably, as shown in FIG. 15, the predetermined adjustment logic described above provides that the orientation of the transfer member 31 changes cyclically over time.

More specifically, the orientation of the transfer member 31 (defined by the radial distance R of the outlet portion 33) is the minimum radial distance R2 (corresponding to the winding trajectory close to the inner mandrel 12) and the largest. Between the radial distance R1 (corresponding to the winding trajectory close to the outer drum 11), the intermediate radial distance R0 (preferably the winding track corresponding to the circumference of the central portion of the annular gap 13). It changes periodically with the passage of time while passing through (correspondence). The periodic change in orientation of the transfer member 31 over time allows the coils formed to be distributed over the entire radial width of the annular gap 13 or over a predetermined portion.

Advantageously, the predetermined adjustment logic described above is such that the orientation of the transfer member 31 is cyclically over time in a manner synchronized with the acceleration-deceleration cycle of the coiler 10 (eg, imposed by the wobbling cycle). It may offer to change.

More specifically, as shown in FIG. 14, the above-mentioned electronic control unit 100 is connected to the above-mentioned electric means 15 of the coiler 10, and in particular, the rotation speed of the coiler 10 is determined according to a predetermined control logic of reel formation. Is configured to control. In particular, the electronic control unit 100 may be programmed to impose a predetermined sequence of acceleration-deceleration cycles on the coiler 10 to perform the so-called wobbling cycle. For this purpose, the rotational angular velocity of the coiler 10 may be detected by a position sensor or encoder 103 associated with the motorized means 15 described above and connected to the electronic control unit 100.

Advantageously, the amplitude (and radial distance R) of the variation in the angular position of the transfer member 31 with respect to the axis Z is inversely proportional to the cross section of the hot-rolled product being wound.

Advantageously, as shown in FIG. 14, the orientation of the transfer member 31 is applied to the actuator 41 (or directly to the kinematic chain 42) and via a position sensor or encoder 101 connected to the electronic control unit 100. Can be detected.

Here, a coil winding method of a hot-rolled product using the coil winding system 1 according to the present invention will be described.

The method according to the present invention includes the following operation steps.
a) A step of associating the support frame 21 with the coiler so that the transport means 20 and the transfer means 30 are positioned in the annular gap 13.
b) A step of transporting the hot-rolled product toward the annular gap 13 by the transport means 20 described above.
c) At the same time as the transfer in the step b) described above, the coiler 10 is rotated about its vertical rotation axis Y, and the hot-rolled product L is imposing a winding track centered on the vertical rotation axis Y, and the bottom wall 14 A step of performing gradual formation of a reel having a plurality of coils in the annular gap 13 starting from.

According to the present invention, in this method, the winding distance R in the radial direction of the hot-rolled product with respect to the vertical axis Y of the coiler in the annular gap 13 is set, and the orientation of the transfer member 31 in the annular gap 13 is set. Adjust and transfer the hot-rolled product in the annular gap 13 via the transfer means 30 from the spiral orbit guided by the rotation of the coiler 10 to obtain a controlled distribution of coils within the annular gap 13 d). Including the process of.

Preferably, in the setting in the step d) described above, the radial winding distance R of the hot-rolled product with respect to the vertical axis Y of the coiler in the annular gap 13 is set in the annular gap 13 in a controlled manner. By changing the direction of the transfer member 31, it changes with the passage of time.

Advantageously, the rotation of the coiler in step c) described above is carried out in a predetermined sequence of acceleration-deceleration cycles. The orientation of the transfer member 31 changes over time in synchronization with the aforementioned acceleration-deceleration cycle of the coiler 10.

The advantages provided by the present invention already highlighted in the description of the coil winding system 1 also apply to the coil winding method and are not repeated here for the sake of brevity.

The present invention provides many of the advantages already partially described.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to orient a hot-rolled product in a controllable manner within an annular gap, optionally affecting the correction of the spiral trajectory induced by the rotation of the coiler. .. Operationally, the orientation of the transfer member forces the hot-rolled product to take a predetermined radial distance from the vertical axis of rotation of the coiler, at least near the same transfer member, resulting in a spiral. The trajectory is adjusted to adjust the formation of the coil S of the reel Q.

Since the transfer member is adjustable in its orientation within the annular gap, the filling of the reel Q can be better controlled during the formation of the reel Q in the rotary coiler.

In the coil winding system of a hot-rolled product using a rotary coiler according to the present invention, when the orientation of the transfer member is changed periodically with the passage of time, the electronic control unit automatically or fixes the orientation of the transfer member. If the settings are provided, they can be managed manually and easily from an operational point of view.

In the case of automatic control, the coil winding system according to the present invention can perform real-time control of coil formation in the coiler.

Real-time control of coil formation via transfer members may be performed as a single control system or in combination with a wobbling cycle.

The coil winding system according to the present invention is simple and economical to carry out because it requires only the installation of a transfer member and its adjusting means as compared with a conventional winding system. As described, such components may be mechanically manufactured and installed in a very simple manner.

Advantageously, the miniaturization of the transfer member relative to the spiral guide allows the transfer member to be adapted to the cross section of the machined hot-rolled product L, resulting in a form of hot-rolled product that is wound on a reel even during wear. If is changed, it will be possible to provide a prompt replacement.

Therefore, the present invention conceived in this way achieves the above-mentioned object.

Obviously, in its practical embodiments, it can be envisioned that the present invention will take embodiments and configurations other than those described above without departing from the current scope of protection.

Moreover, all details may be replaced with technically equivalent elements and the dimensions, shapes and materials used may be of any kind as required.

Claims (22)

A coil winding system for hot-rolled products
A rotating coiler (10) having a vertical axis (Y), comprising an outer drum (11) and an inner mandrel (12) coaxial with the outer drum (12), the outer drum (11) and the inner side. The mandrel (12) partitions an annular gap (13) whose bottom is closed by a bottom wall (14) integrated with the outer drum (11) and / or the inner mandrel (12). With a coiler arranged so that the hot-rolled product is wound in a reel shape,
A means (20) for transporting a hot-rolled product that enters the coiler (10) toward the annular gap (13), and is a support frame rotatably fixed to the coiler (10). 21) and the means of transportation associated with
With
Further provided with a transfer means (30) that deflects the hot-rolled product in the annular gap (13) from a spiral trajectory induced by the rotation of the coiler (10).
The transfer means (30) is arranged downstream of the transport means (20) with respect to the approaching motion of the hot-rolled product in the coiler (10), and the transfer means (30) of the coiler in the annular gap (13). It is configured to set the radial (R) winding distance of the hot-rolled product with respect to the vertical axis (Y).
The transfer means (30) includes a transfer member (31) that comes into contact with the hot-rolled product during use, and is inside the annular gap (13) so as to change the setting of the winding distance (R) in the radial direction. The orientation of the transfer member can be adjusted with
Coil winding system. The coil winding system according to claim 1, wherein the transfer means (30) is associated with the support frame (21). The support frame (21) is movable relative to the coiler (10).
The coil winding system (1) further comprises means (50) for moving the support frame (21) relative to the coiler (10).
The coil winding system according to claim 1 or 2. The coil winding system according to claim 3, wherein the support frame (21) is coaxially movable with respect to the coiler (10). The support frame (21) is axially hollow and is configured to be at least partially inserted into the annular gap (13) to coaxially receive the inner mandrel (12) inside.
4. The transfer means (30) is associated with a lower portion (21a) of the support frame (21) intended to be inserted into the annular gap (13) during use, claim 4. Coil winding system. The transfer member (31) partitions an internal through-seat portion (32) for the hot-rolled product, and the internal through-seat portion is a radial distance (Y) with respect to the vertical axis (Y) of the coiler. In R), it ends at the outlet portion (33) that is positioned within the annular gap (13) during use.
The transfer member (31) can be oriented relative to the annular gap (13) between the outer drum (11) and the inner mandrel (12), and the annular gap (13). The radial distance (R) of the outlet portion (33) inside is changed, and the radial winding distance (R) of the hot-rolled product that comes out of the transfer member (31) during use is set to the vertical axis. The hot-rolled product is deflected from the spiral orbit induced by the rotation of the coiler (10) by changing with respect to (Y).
The coil winding system according to any one of claims 1 to 5. The transfer member (31) is pivotally supported on the support frame (21) with a vertical swivel axis (Z) as a center, and the vertical distance (R) of the outlet portion (33) is changed so as to change the distance (R) in the radial direction. It is rotatable about a swivel shaft (Z), preferably the vertical swivel shaft (Z) passes inside the annular gap (13), and more preferably the central portion of the annular gap (13). The coil winding system according to claim 6, which passes through the circumference of the above. The transfer member (31) imposes a trajectory on the hot-rolled product in an annular gap (13) forming an inclination angle (β) toward the bottom wall (14) with respect to a horizontal reference plane on a vertical projection plane. 1 The coil winding system described in 1. The coil winding system according to any one of claims 1 to 8, further comprising an adjusting means (40) for adjusting the orientation of the transfer member (31) in the annular gap (13). The coil winding system according to claim 9, wherein the adjusting means (40) includes an actuator (41) directly or indirectly connected to the transfer member (31) via a transmission device (42). 5. The coil winding system described in. The adjusting means (40) is connected to the actuator (41) and is electronically controlled to control the intervention of the actuator (41) according to a predetermined adjustment logic of the orientation of the transfer member (31). The coil winding system according to claim 9, 10, or 11, comprising the unit (100). The predetermined adjustment logic provides that the orientation of the transfer member (31) changes over time, preferably in a manner synchronized with the acceleration-deceleration cycle of the coiler (10). 12. The coil winding system according to 12. The coil winding system according to any one of claims 1 to 13, wherein the transfer member (31) is composed of a tubular, linear, or curved main body. The coil winding system according to any one of claims 1 to 13, wherein the transfer member (31) is composed of a roller guide. A spiral guide (60) arranged between the transport means (20) and the transfer means (30) is provided.
The spiral guide (60) is configured to impose a curvature having a predetermined average radius of curvature on the hot rolled product, preferably the predetermined average radius of curvature is the annular gap (the annular gap (60). The coil winding system according to any one of claims 1 to 15, which corresponds to the radius of the circumference of the central portion of 13). An internal through-seat portion (32) for the hot-rolled product in the transfer member (31) partitions a curved track, preferably a predetermined average radius of curvature of the spiral guide (60). The coil winding system according to claim 6 or 16, which has a circumferential arc having substantially the same radius of curvature as the above. The coil winding system according to any one of claims 1 to 15, wherein the transfer means (30) is arranged immediately downstream of the transfer means (20) without interposing a spiral guide. The coil winding system according to claim 6 or 18, wherein the internal through-seat portion (32) for the hot-rolled product in the transfer member (31) partitions a curved or straight track. A method of coil-winding a hot-rolled product via the coil-winding system (1) according to any one of claims 1 to 19.
a) A step of associating the support frame (21) with the coiler so as to position the transport means (20) and the transfer means (30) in the annular gap (13).
b) A step of transporting the hot-rolled product toward the annular gap (13) by the transport means (20), and a step of transporting the hot-rolled product toward the annular gap (13).
c) At the same time as the transfer in the step b), the coiler (10) is rotated about its vertical rotation axis (Y), and the hot-rolled product is provided with a spiral trajectory centered on the vertical rotation axis (Y). A step of imposing and performing a gradual formation of a reel having a plurality of coils in the annular gap (13) starting from the bottom wall (14).
d) The radial winding distance (R) of the hot-rolled product with respect to the vertical axis (Y) of the coiler in the annular gap (13) is set, and the transfer within the annular gap (13). By adjusting the orientation of the member (31), the transfer means (30) deflects the hot-rolled product in the annular gap (13) from the spiral trajectory guided by the rotation of the coiler (10). The step of obtaining a controlled distribution of coils within the annular gap (13), and
Including methods. In the setting in the step d), the radial winding distance (R) of the hot-rolled product with respect to the vertical axis (Y) of the coiler in the annular gap (13) is the annular gap (13). ). The method according to claim 20, wherein the transfer member (31) changes with the passage of time by changing the direction of the transfer member (31) in a controlled manner. The rotation of the coiler in the step c) is executed in a predetermined series of acceleration-deceleration cycles, and the orientation of the transfer member (31) is synchronized with the acceleration-deceleration cycle of the coiler (10). 21. The method of claim 21, which changes over time.

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