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Electromagnetic device intended for stabilised position of strip made of ferromagnetic material, reduced deformation of above strip and respective method

Electromagnetic device intended for stabilised position of strip made of ferromagnetic material, reduced deformation of above strip and respective method
IPC classes for russian patent Electromagnetic device intended for stabilised position of strip made of ferromagnetic material, reduced deformation of above strip and respective method (RU 2557044):
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Invention relates to agriculture and can be used in balers. The drive roller for actuation of at least one flat tape comprises a housing with a coating applied on it at discrete parts. Between the discrete parts of coating a continuous peripheral channel is formed, having a first diameter relative to the rotation axis of the drive roller. The coating has a plurality of first grooves on its surface and at least one peripheral groove intersecting the first grooves within the width of each discrete part of the coating. The first grooves are substantially nonparallel to the direction of displacement and comprise two inner walls connected by a bottom part having a second diameter relative to the axis of rotation of the drive roller. The second diameter of the bottom part is greater than the first diameter of the peripheral channel.

FIELD: electricity.

SUBSTANCE: invention is referred to a device intended for the stabilisation of the position of a strip made of a ferromagnetic material in the process of application of a coating on it. The electromagnetic device comprises the first electromagnets and the second electromagnets mirroring the first electromagnets in regard to a line (50) of the strip passing (4). Each electromagnet has a core containing one pole and one coil supplied by current and wound around the above pole. The device also comprises a connecting element (26) made of a ferromagnetic material, which connects cores of the first electromagnets (15, 15', 15", 15'"), and a connecting element (26') made of a ferromagnetic material, which connects cores of the second electromagnets (16, 16', 16", 16'"). The connecting elements (26, 26') are mirroring in regard to the line (50) of the strip passing (4).

EFFECT: invention ensures the stabilisation of the strip and minimisation of its deformation by applying forces continuously distributed in the direction crosswise to the strip notwithstanding its width.

15 cl, 22 dwg

 

The technical field to which the invention relates

The invention relates to the field of technology related to coating methods and devices for coating on a flat body made of a ferromagnetic material such as steel strip. In particular, the invention relates to a device for stabilizing a metal strip of ferromagnetic material in the process of coating of a molten metal (for example, in the galvanization process). The present invention also relates to an apparatus for applying a coating of a molten metal on the metal strip that contains the specified electromagnetic device. Ultimately, the present invention relates to a method of stabilizing the strip of ferromagnetic material, for example, a metal strip, and/or correction of deformity specified bandwidth.

The level of technology

As you know, on the surface of strips of ferromagnetic material, for example, on the surface of the metal strips, the coating is applied by applying a suitable coating methods. Fig.1 schematically shows a traditional device for coating in the process of passing metal strip 4 through the crucible 111, containing a bath of molten metal 7. In the crucible 111, containing a bath of molten metal 7, metal strip 4 is fed with�aruge with a certain slope and is removed from the crucible in the vertical direction by means of rollers 2, 3, which is installed inside of the crucible 111. In particular, the roller 2, referred to as "submerged roller", is intended to provide the path of the moving metal strip 4, and the additional corrective rollers 3 are intended to partially correct the deformation of a metal strip 4, the so-called "transverse" deformation and partly to stabilize the metal strip.

Below, in the course of the crucible 111, i.e., at the exit point 7 of the molten metal, has a unit for removing from the surface of a metal strip excess coating by means of air knives (using air or inert gas) or magnetic knife 5 rings, scraper rings, the excess molten metal from the surface of the metal strip and the guide mentioned the excess molten metal back into the bath 7.

After removal of excess coating metal strip 4 is subjected to cooling by jet cooling device 5', placed vertically along the direction of travel of the strip. After cooling, specified by the cooling unit 5' metal strip 4 reaches the upper roller 6, it is necessary to ensure conditions which do not jeopardize the quality of the coating by contact of a metal strip with said roller. Therefore, the implementation of specified�on the method of coating metal strip 4, have vertically, must be fully supported under tension between two points the distance between which is usually from 30 to 50 m.

Recently, instead of coating methods using a large-size crucibles containing molten metal (up to 400 t), have been developed coating methods using a relatively small crucibles 111', in which the molten metal is held by the magnetic field (see Fig.2). In these crucibles 111' no moving mechanical parts, and when the metal strip 4 is held in the vertical direction through the crucible, the molten pool is held in the crucible by electromagnetic device 8. More specifically, in the crucible 111', containing a bath of molten metal held by the magnetic field, the metal strip 4 is fed through the inlet opening 9, located at the bottom of the crucible specified, and exits through the outlet located opposite the inlet.

When implementing the methods of coating devices described and schematically shown in Fig.1 and 2, a metal strip 4 is subjected to vibration which is caused mainly jet cooling devices 5' and 5 knives. In the method of coating with�OSU the device shown in Fig.1, the vibration of the metal strip due to the presence of gaps between used mechanical guide elements, in particular rollers 2, 3, and in the implementation of the method of coating by means of the device shown in Fig.2, the vibration of the metal strip is invoked by action of the electromagnetic device 8, which provides levitation of molten metal 7. As noted above, in the method of coating by means of the device shown in Fig.1, the metal strip is also undergoing static deformation (transverse) associated with local plastic deformation of a metal strip near immersion rollers 2, 3. This phenomenon also significantly impair the stability of the feed metal strip 4. In addition, in the method of coating by means of the device shown in Fig.2, the vibration of the metal strip 4 can lead to the violation of the lower free surface of the metal bath 7 and, hence, to the emission of molten metal from the surface of the bath.

These shortcomings can cause changes in the thickness of the coating along the length of the metal strip 4, i.e., may be exceeded required for classification of the product the thickness of the coating. As you know, in a reference standard�Ah sets the minimum threshold of the thickness of the coating, the excess of which is unacceptable. In fact, as a result of vibration and static deformation of a metal strip 4, the coating is distributed unevenly, it also reduces the efficiency of gas and/or electromagnetic knives, because the distance from the blades to a metal strip should be increased to avoid accidental contact of the blades with a metal band. In this regard, is usually provided for such excess thickness of the coating, to ensure minimum threshold thickness is 95% of the surface of a metal strip 4. Also when coating reduce the feed speed of the metal strip, which leads to undesirable performance degradation.

It should be noted that the emission of a spray of molten metal through the inlet opening 9 of the crucible 111' occurring in the implementation of the method of coating by means of the device shown in Fig.2, has a negative impact on the quality of the coating. In fact, these splashes of molten metal adheres to the activated surface of the metal strip 4 and instantly interact with the strip before it enters the bath of molten metal 7. As a result of this phenomena on the surface of a metal strip 4 formed sections with a coating of a different composition, resulting in deterioration of the quality�TWA a metal strip 4.

In connection with the above, when coating in this way is necessary in a device for applying a coating to minimize vibration and deformation of the metal strip 4, in particular, on the plot above in the course and/or below in the course of the crucible containing the molten metal. In the coating process to improve the stability of a metal strip in the past we developed an electromagnetic device that was installed in the area where should be minimized vibration (for example, close to the gas knives).

Fig.3 shows an electromagnetic device, currently used for local stabilization of the metal strip 4 in the coating process. Shown in Fig.3 the device comprises several pairs of electromagnetic actuators 10, 10', 10", 10"', each of which is formed of two electromagnets facing each other. Each of the electromagnetic actuators are aligned with at least one adjacent electromagnetic Executive element in the direction of 100', which is orthogonal to the direction of the 100 moving metal strip 4. The supply current of each electromagnet of the electromagnetic actuators provide power amplifiers, regulated as without feedback and with feedback. Managing si�nal, establishing the strength of the current supplied to the electromagnetic actuators formed by a pair of electromagnets, is generated based on operating information, for example, on the actual position of the metal strip 4 relative to theoretical line of the passage, the thickness and uniformity of coating thickness and/or width of a metal strip 4, or linear velocity. In particular, in the device shown as an example in Fig.3, the signal coming from the position sensors 11, 11', 11", 11"', designed to determine the position of a metal strip 4 relative to a theoretical line passing. More precisely, according to the signal coming from each sensor are activated facing each other electromagnets of the electromagnetic control element. The management of the respective pair of electromagnetic actuators 10, 10', 10", 10"' is provided on the basis of signals from position sensors 11, 11', 11", 11"'. Thus, the number of sensors 11, 11', 11", 11"' necessarily correspond to the number of electromagnetic actuators 10, 10', 10", 10"', containing a pair of electromagnets.

Fig.4 shows a top view of the device shown in Fig.3, and shows the impact of magnets on the metal strip 4. In particular, metal strips� 4 is under the action of forces, put a pair of electromagnets of the electromagnetic elements 10, 10', 10", 10"', moreover, the resultant forces 14, 14', 14" are on the band is strictly a point, however the point of application of these resulting forces do not correspond to theoretical 15 points of application of resultant forces for the stability of a metal strip (i.e., ensure the location of the strip in theoretical plane 50), namely to prevent oscillations of the strip and compensation of the static deformation of the strip.

From the above we can conclude that a limited number of electromagnets can be adjusted to all sorts of configuration changes of a metal strip 4. It should also be noted that with the limited number of electromagnets there are additional problems associated with the application of forces to the marginal portions 4' of the metal strip 4. In fact, the resultant force created by each pair of electromagnets depends on the section length of a metal strip 4 facing to said electromagnets, and, therefore, changes, changing the transverse dimension (width 4”) strip (see Fig.7).

Fig.5 and 7 shows the metal strip 4 and the forces generated by the four electromagnets 13. These drawings differ from each other the distance between the electromagnets 13 � width 4” metal strip 4. It should be noted that the forces generated by the specified four electromagnets 13, is applied locally and does not have effective action at regional sites 4' metal strip 4. Therefore, it is necessary to increase the strength of the current supplied to the electromagnets 13 to provide the desired distortion. However, this leads to rapid saturation of the electromagnets 13 and to problems associated with overload.

The technical solution shown in Fig.5, can be clearly improved by increasing the number of magnets 13 placed in the transverse direction 100' and as close as possible to each other, as shown in Fig.6. However, the implementation of the above technical solutions can occur, in essence, the "notched" the distribution of the forces acting on the metal strip 4, in addition, a substantial increase in the number of power supply units and cables to actuate the various solenoids 13, therefore, becomes more complicated as the device and its management and, therefore, increase costs.

In the patent application WO 2006/101446 describes another electromagnetic device for the stabilization of the metal strip 4 in order to solve the adaptation of the device to strips of different widths provides for the use of the minimum amount�VA electromagnets, namely, three electromagnets that addresses three main forms of vibration modes of the strip. According to patent application EP 1784520 in the device for local stabilization of metal strips are provided side magnets, which are mounted movably, so that you can change their location in accordance with the width of the metal strip, i.e. when you want, you can concentrate the force, at least at the marginal parts of the strip. Obviously, the above technical solution is not satisfactory, since they are only effective to eliminate certain forms of oscillation modes, i.e., effective when a specific and well-defined instability strip.

Disclosure of the invention

Therefore, the main object of the present invention is to propose an electromagnetic device for stabilization of a strip made of ferromagnetic material, such as metal strips, and reduce deformation of a specified band in the coating process. Thus, one of the objectives of the present invention is to propose an electromagnetic device that can effectively reduce the vibration strips made of ferromagnetic material, and to compensate for any static deformation (transverse) bands. Another object of the present every�retenu is to offer the device as part of the process, based on electromagnetic levitation of liquid metal, able to eliminate the leakage of liquid metal caused by the action of the magnetic field, providing levitation of molten metal. Also, the present invention is to provide a device which will be reliable in operation and easily manufactured and relatively competitive costs.

Thus, the present invention relates to electromagnetic apparatus comprising first magnets, aligned in a direction parallel to the first theoretical line passing through the specified metal strips and orthogonal to the direction of travel of the strip, which, in turn, parallel to the specified theoretical plane. Electromagnetic device also contains a second electromagnets in a mirrored arrangement with said first electromagnets relative to the specified theoretical line passing a metal strip. Each of the electromagnets has a core containing at least one pole, and one fed by the current of a coil wound around the specified pole.

An electromagnetic device according to the invention also comprises a first connecting element made of ferromagnetic material, which� connected, at least one specified pole of each of the first electromagnets, and comprises a second connecting element made of ferromagnetic material, which is connected at least with one of the specified pole of each of the second electromagnets. The second connecting element is essentially a mirror with the first connecting element relative to the specified theoretical route of the specified metal strip.

The next aspect of the present invention relates to an apparatus for coating a strip made of a ferromagnetic material containing an electromagnetic device according to the present invention.

According to an additional aspect of the invention, to solve this problem is proposed a method for stabilizing feed strip made of ferromagnetic material, and/or correction of deformity specified band conducted by means of the aforementioned device, wherein said method includes the following steps:

- generating a first independent magnetic fields and generating a second independent magnetic fields in a mirrored arrangement with said first independent magnetic fields relative to a theoretical line passing a specified band;

- transmission and distribution wook�ƈ the first magnetic field by the first means for transmission and distribution of magnetic fields with the aim of creating the first continuous magnetic field, distributed in the transverse direction parallel to a specified band;

- transmission and distribution of the second magnetic field using the second means for transmission and distribution of magnetic fields to create a second continuous magnetic field distributed in a specified transverse direction mirror with the first continuous magnetic field created by using the specified first means for transmission and distribution of magnetic fields.

Brief description of the drawings

Additional features and advantages of the invention will be more apparent from the detailed description of a preferred but not exclusive embodiments of an electromagnetic device according to the present invention, disclosed through non-restrictive example with reference to the accompanying drawings.

Fig.1 and 2 - schematic view of the first device for the coating of metal strip and the second device for applying the coating on the metal strip.

Fig.3 and 4 perspective view and a top view of the electromagnetic device according to prior art.

Fig.5, 6 and 7 - top views of various electromagnetic devices according to prior art.

Fig.8 is a top view of the first embodiment of the electromagnetic device according to the present izobreteny�.

Fig.9 and 10 different types of deformation bands, adjustable by means of an electromagnetic device shown in Fig.8.

Fig.11 is a perspective view of the electromagnetic device shown in Fig.8.

Fig.12, 13, 14 and 15 have different distribution acting on a strip of forces created by the electromagnetic device shown in Fig.8 and 9.

Fig.16 and 17 is a top view and a perspective view of the second variant of the electromagnetic device according to the present invention.

Fig.18 and 19 kinds of the side of different variants of the electromagnet of the electromagnetic device shown in Fig.8-11.

Fig.20 and 21 kinds of the side of different variants of the electromagnet of the electromagnetic device shown in Fig.16-17.

Fig.22 is a perspective view of the third variant of the device according to the present invention.

In the drawings the same elements and the same components are designated by the same reference positions.

Detailed description of the invention

Electromagnetic device 1 according to the present invention can be applied to stabilize the strip of ferromagnetic material (hereinafter referred to simply as "band 4") and minimizing deformation (transverse) specified band, preferably, in the apparatus for the coating of a molten metal. Electromagnetic device 1 of the most preferred�Stateline to apply for the stabilization of the strip 4, in particular, in devices for coating, examples of which are schematically shown in Fig.1 or Fig.2. From the following description it will become obvious that the electromagnetic device according to the invention can be applied not only to correct any deformation of the strip made of ferromagnetic material, but also to intentionally deform the strip.

Fig.8-22 presents options to the electromagnetic device 1 according to the present invention. Electromagnetic device 1 according to the invention contains the first electromagnets 15, 15', 15", 15"' and second electromagnets 16, 16', 16", 16"'. The first electromagnets 15, 15', 15", 15"' aligned in the transverse direction 100', essentially parallel to theoretical line 50 passing lanes 4 and orthogonal to the moving direction 100 that is parallel to a specified theoretical plane. Similarly, the second electromagnets 16, 16', 16", 16"' aligned in a direction which is also parallel to theoretical line 50 passing lanes 4 and orthogonal to the specified direction of travel 100. More specifically, relative to a specified theoretical plane 50, the first electromagnets 15, 15', 15", 15"' located in a mirrored arrangement with the second electromagnets 16, 16', 16", 16"'. In the context of the invention with�bookmania "theoretical line 50 passing" relates to a theoretical plane, along which the strip 4 should move under ideal conditions, i.e. without any fluctuations.

According to the present invention, each of the electromagnets, namely first and second electromagnets 15, 15', 15", 15"', 16, 16', 16", 16"', has a core containing at least one pole and at least one coil wound around the specified pole and supplied with a current, the force preferably is adjustable.

In a preferred embodiment the device shown in the drawings, the core has, in essence, the "E"-shaped structure, i.e. contains three poles 18, 18', 18" and the yoke 19, which connects with each other the poles 18, 18', 18". These poles 18, 18', 18" and specified the yoke 19 may be made of ferromagnetic material, which can be both stratified and non stratified. More specifically, the core comprises a first pole 18, the second pole 18', located above the first pole 18 and the average pole 18 located between the first pole 18 and the second pole 18'. Each of these electromagnets 15, 15', 15", 15"', 16, 16', 16", 16"' also contains, at least one fed by the current of a coil wound around one of the poles 18, 18', 18". In an alternative embodiment, not shown in the drawings, the core of each of electromagneto� 15, 15', 15", 15"', 16, 16', 16", 16"' contains only two poles, and, at least around one of the poles is wound the coil. Consequently, the core of each of the electromagnets 15, 15', 15", 15"', 16, 16', 16", 16"' has essentially "C"-shaped structure, and not "E"-shaped structure described above.

When power is supplied to the corresponding coil or coils of the first magnet generates a first magnetic field with a first side of the said strip 4. Therefore, generating and regulating said first magnetic field is carried out independently. In other words, each magnetic field is different in tension from other magnetic field as the coil or the coil is supplied with current of different strength. Similarly, when power is applied to the second coils of the electromagnets 16, 16', 16", 16"' generates a second magnetic field, too independent, each of which is in a mirrored arrangement with one of the first magnetic fields.

According to the present invention an electromagnetic device 1 comprises a first connecting element 26 made of ferromagnetic material, and a second connecting element 26' made of a ferromagnetic material. The first connecting element 26 connects the first cores of the electromagnets 15, 15', 15", 15"', and the second will connect�flax element 26' connects the second cores of the electromagnets 16, 16', 16", 16"'. The first connecting element 26 and the second connecting element 26' are mirror relative to theoretical plane 50 of filing. In particular, in the embodiments shown in the drawings, the first connecting element 26 connects the middle pole 18" of the first electromagnets 15, 15', 15", 15"', and the second connecting element 26' connects the middle pole 18" second electromagnets 16, 16', 16", 16"'.

Fig.8 shows a schematic view of a first embodiment of a device 1 according to the present invention. The first connecting element 26 and the second connecting element 26', preferably, are rods of rectangular cross section made of ferromagnetic material, which can be both stratified and non stratified. As mentioned above, two of the connecting element 26, 26' are in a mirrored position relative to theoretical plane 50, with their longitudinal axis parallel to the transverse direction 100' alignment of the electromagnets 15, 15', 15", 15"', 16, 16', 16", 16"', i.e. orthogonal to the direction of the 100 moving strip 4. In particular, in a preferred embodiment of the device 1, the length of each of the two connecting elements 26, 26' in the specified transverse direction 100' greater than or equal to the length of the strip 4 in the specified �s direction.

The first connecting element 26 transmits and distributes the first magnetic field generated by the first electromagnet 15, 15', 15", 15"', with the aim of creating the first continuous magnetic field distributed in the transverse direction 100'. Essentially, the first continuous magnetic field generated by the first connecting element 26 that defines first source of magnetic fields distributed in space such that all points of the profile strip 4 is located under the action of magnetic forces. Similarly, the second connecting element transmits and distributes the second magnetic field generated by the second electromagnets 16, 16', 16", 16"', to create a second continuous magnetic field distributed in the transverse direction 100' and located in a mirrored arrangement with the first continuous magnetic field created by the first connecting element 26. The second connecting element 26' essentially defines a "second source of magnetic fields distributed in space, wherein said second source is in a mirrored arrangement with the first source, defined by the first connecting element 26.

Thanks to the power of the different coils of the electromagnets of different amperage and the use of two connecting elements 26, 26' is received, in fact, continuous h�adelene forces in space along the length of the profile strip 4, regardless of its width. In this regard, it should be noted that during the same operation, the coating can be treated strips 4 different widths. With the help of the device according to the invention, preferably, is scheduled distribution of forces regardless of the bandwidth. It should also be noted that since it is constantly created variables force continuously acting on the entire width of the strip 4, the device 1 according to the invention, unlike devices of the prior art, eliminates the need for movable parts for moving the source of force for the purpose of application of force to the marginal parts of the strip.

Fig.8 the dotted line shows the deformation of a metal strip 4 (referred to in the following description as "deformation of a metal strip 4"), the solid line shows the position of a metal strip 4, which is ensured thanks to the device 1 according to the present invention. Therefore, by changing the current feeding the coils of the electromagnets 15, 15', 15", 15"', 16, 16', 16", 16"' the device 1, and by the achievement of a desired orientation of forces, it is possible to obtain a continuous distribution of forces over the entire width of a metal strip 4 (i.e. essentially between said marginal portions 4'). This means that when applying make�TWA according to the present invention, unlike traditional devices, to each point of the profile of a metal strip 4 is applied a force of a certain magnitude and a certain orientation, thus reducing the deviation of the strip from an ideal position (theoretical plane 50).

For example, as shown in Fig.8, the first half of the width of the metal strip 4 is under the action of forces 45, which is oriented in the first direction and, thus, minimize the first deviation of the strip 46 from the respective theoretical positions, i.e. from theoretical line 50 passing lanes. At the same time, the other half of a metal strip 4, the direction of the deviation from theoretical plane 50 is opposite to the deviation of the first half of the strip is under the action of forces 45', oriented in a second direction opposite the first direction.

Fig.9 and 10 show other types of deformation of a metal strip 4, which is able to adjust the electromagnetic device 1 according to the present invention. It should be noted that the deformation shown in particular in Fig.10, a similar strain, shown in Fig.4, which, as described above, can not effectively adjust the traditional electromagnetic devices, ensuring the application of forces only to areas of the metal strip facing to the electromagnets. Two of the connecting element 26, 26' of the electromagnetic device 1 according to the invention, unlike conventional devices that provide such a distribution of forces that the entire profile of a metal strip 4 is under the influence of said force.

The examples shown in Fig.8, 9 and 10, show that the proposed in the invention, the electromagnetic device 1 is able to correct any deformation of a metal strip 4, i.e. the metal strip 4 may be held essentially along a theoretical plane 50. The conclusion is that the electromagnetic device 1 according to the invention is highly versatile from the point of view of functionality, so that the specified device can be used in the coating process, how to adjust the vibrations caused by a device for removing excess coating (gas or magnetic knives), and for the correction of deformations generated by the roller coating process based on electromagnetic levitation of a bath of molten metal.

Fig.12-15 show other options for the distribution of forces that can be achieved by changing the current (denoted by reference positions 23, 23', 23", 23"'), supplied to coils of the electromagnets 15, 15', 15", 15"', 16, 16', 16", 16"'. In order to simplify the drawing�th shows a metal strip 4, and only the first electromagnets 15, 15', 15", 15"'. Fig.13 shows the distribution of forces and, in particular, the position of the corresponding resultant force 22 when the power supply 23 of the first force to one of the electromagnets (which is denoted by the reference position 15'). However, Fig.14 schematically shows the distribution of forces due to the simultaneous activation of the two electromagnets 15' and 15", which are fed, respectively, the current is 23" and the current 23"', and the current 23" differs from the current 23"'.

Finally, Fig.15 shows the distribution of forces due to the simultaneous activation of two adjacent electromagnets 15', 15" coil which is supplied with current 23' of the same strength. When comparing Fig.13, 14 and 15, it should be noted that the location of the point of application of resultant force 22 varies depending on the number and location of activated electromagnets, and also depending on the current, which is supplied to the coils of the electromagnets 15, 15', 15", 15"', 16, 16', 16", 16"'.

Fig.18 and 19 shows a side view of the electromagnet (denoted by the reference position 15), which can be used in the device previously shown in Fig.8-11. In particular, Fig.18 shows a preferred embodiment of an electromagnet containing a single supplied with a current the coil 17 is wound around the mean pole 18” CERD�the source. In this technical solution the height of the coil, preferably, increased.

Fig.19 shows an alternative technical solution, which provides three supplied with a current coil: secondary coil 17 is wound around the middle of the pole 18, the first auxiliary coil 17', is wound around the first pole 18 and the second auxiliary coil 17", wound around the second pole 18'. To reduce the weight specified supplied with a current coil (secondary coil 17 and the auxiliary coil 17', 17") can be water-cooled. Poles 18, 18', 18", preferably, have a prismatic shape and a rectangular cross-section.

The yoke 19 of the core also having a prismatic shape and a rectangular cross-section, connects with each other the end portions 38 of the three poles 18, 18', 18", lying in the plane 51, which is essentially parallel to the specified theoretical plane 50. Corresponding connecting element 26 is connected to the other end section 38' of the middle pole 18", the opposite end section 38 which is connected to the yoke 19.

The minimum cross-section of each of the connecting elements 26, 26' of the device shown in Fig.11, should be at least one-fifth of the square of the length 32 of the middle pole 18” connected with the corresponding connecting element 26. In private�STI, the specified length 32 measured in a direction essentially parallel to the specified theoretical plane 50 move. If the cross-section of each connecting element is greater than or equal to the minimum cross-section for optimum uniformity of distribution of the forces acting on the metal strip 4, in addition, prevents the saturation of the core.

In preferred embodiments, the electromagnets shown in Fig.18 and 19, as the first pole 18 and the second pole 18' is not acting as a front for a corresponding connecting element 26, which is connected with the middle pole 18" of each of these electromagnets 15, 15', 15", 15"', 16, 16', 16", 16"' device 1. This means that in each of these electromagnets 15, 15', 15", 15"', 16, 16', 16", 16"' the distance 35 from the respective connecting element 26, 26' to theoretical plane 50 is less than or equal to the distance of 35' from the first 18 or second 18' poles to the same theoretical plane 50 (in particular, see Fig.18). It should be noted that the distance of 35' to theoretical plane 50 from the specified first pole 18 and the specified second pole 18' is identical.

Fig.16 and 17 show a second variant of the device according to the present invention. The specified device 1 comprises a first connect�first item 27, connecting with each other of the yoke 19 of the first electromagnets 15, 15', 15", 15"'. The device 1 also contains a second coupling piece 27' connecting with each other of the yoke 19 of the second electromagnets 16, 16', 16", 16"'. In particular, the first coupling piece 27 connects the rear portions of the yokes 19 of the first electromagnets 15, 15', 15", 15"'. The phrase "rear area" is used to denote a section of the yoke, essentially the most distant from theoretical line 50 passing lanes. As shown in the top view shown in Fig.16, the second coupling piece 27' similarly connects the rear portions of the yokes 19 second electromagnets 16, 16', 16", 16"'.

Fig.20 and 21 shows the different side of the electromagnets of the electromagnetic device shown in Fig.16 and 17. In particular, Fig.20 presents a technical solution, according to which the electromagnet has a single coil 17 is wound around the mean pole 18”, similar to the electromagnet according to the technical solution shown in Fig.18. Meanwhile, Fig.21 presents the technical solution according to which there are three coils 17, 17', 17", similar to the technical solution described above and shown in Fig.19. Everything listed in the description regarding technical solutions presented on the f�G. 18 and 19, applies to technical solutions shown in Fig.20 and 21.

According to the embodiment, shown in detail in Fig.20 and 21, the first connecting piece 27 and the second coupling piece 27' is a plate made of ferromagnetic material, which can be both stratified and non stratified. In particular, the height of section 37 of each of the connection plates, measured in a direction parallel to theoretical line 50 passing lanes, greater than or equal to the height of each of the yokes 19, which are connected to the specified connection plate. In addition, the thickness of each of the connecting parts 27, 27' in the form of plates, measured in a direction orthogonal to a specified theoretical line 50 passing lanes, is at least 1 mm.

It should be noted that the uniform distribution of current on a strip of 4 forces are improved if the coils contain two connecting pieces 27, 27'. Thus, as shown in Fig.16 distribution of forces 45, 45' to compensate for the deformation of the strip is different from the distribution of these forces provided by the device shown in Fig.8. It should be noted that the technical solution shown in Fig.16, provides a more smooth distribution of forces compared with the technical solution shown in Fig.8, �, therefore, more effective adjustment of the strip 4. It should also be noted that if there are two connecting parts 27, 27', preferably, decreases the saturation of the cores of the electromagnets 15, 15', 15", 15"', 16, 16', 16", 16"" and, accordingly, increase the performance of the device 1.

Fig.22 shows an additional variant of the electromagnetic device 1 according to the invention in which the yoke 19 of the first cores of the electromagnets 15, 15', 15", 15"' form a single whole, i.e. manufactured as a single body 28. Similarly, the yoke 19 of the second cores of the electromagnets 16, 16', 16", 16"' manufactured as a single body (not shown in the drawings).

Thanks to the technical solution shown in Fig.22, can significantly improve the efficiency of the electromagnetic device 1, and further limit the problems associated with saturation of the electromagnets. It should also be noted that, according to the technical solution increases the rigidity of the electromagnetic device 1, since the yoke is made as a single body 28, which may be painted, preferably, configured such that they might be metallic support structure of the device. In particular, the specified single body 28 may also be provided with a locking element, providing �the system of the electromagnetic device in the devices for applying the coating to the strip 4, which are schematically shown in Fig.1 and 2.

In any of the above variants of the electromagnetic device 1 according to the invention contains a variety of position sensors capable of determining the position of the preset point of the strip 4 relative to theoretical line 50 passing lanes. According to the type of position sensors, they can be set more or less close to the region of space, which on the one hand limits specified first connecting element 26, and on the other side, opposite the first side, limits specified second connecting element 26'.

In any of the above-described variants of the device 1, the activation of the electromagnets 15, 15', 15", 15"', 16, 16', 16", 16"' (i.e. supplying power to coils of the electromagnets) are adjusted according to the information received from the aforementioned sensors. It is established that the use of eddy current sensors is the most preferred. However, without doubt, can be used sensors of another type, for example, a capacitance-type sensors or laser sensors.

In a preferred embodiment of the device according to the invention the amount of eddy current sensors is preferably less than the number of electromagnets of the device 1. Each of these sensors is positioned so that he was able to determine� in a pre-specified point position of the strip 4, i.e. to determine the deviation of the strip from a reference plane, which may be, for example, a theoretical plane 50. The signals of these sensors are received in the processing unit, which processes them to reconstruct the true shape of the band (deformation). In particular, the processing unit implements an interpolation function, which points, reconstruct the true shape of the band 4. Based on the true shape of the strip 4, the processing unit determines the distribution of forces that must be applied to the strip to minimize the deviation of the strip from theoretical line 50 passing. According to the specified distribution, the control unit electromagnets (possibly combined with the processor unit adjusts the power supply to the coils 17, 17', 17" of the electromagnets 15, 15', 15", 15"', 16, 16', 16", 16"', to provide enough current to create the required forces.

It should be noted that, unlike traditional Electromechanical devices, sensor signals are used preferably for the simultaneous regulation of the supply of the electromagnets of the electromagnetic device. Without a doubt, in this case it is possible to perform more accurate and uniform adjustment of the strip. Furthermore, the use of interpolation functions to calculate the deformation of the strip, preferred�flax, reduces the number of sensors used and, thus, to limit the total expenses.

In a preferred embodiment of the device according to the invention eddy current sensors, which form a couple, is placed on both sides of the strip 4, symmetrically with respect to a theoretical line 50 passing lanes. It should be noted that the particular arrangement of sensors allows you to automatically calibrate the measurement system based on a distance between facing each other with the sensors, as the distance is known. The said special arrangement of the sensors also allows you to reduce superimposed on the signal of one sensor noise, the occurrence of which is due to the proximity of the magnetic fields generated by the electromagnets 15, 15', 15", 15"', 16, 16', 16", 16"'.

An electromagnetic device according to the invention is able to perform the tasks. In particular, the device minimizes vibrations and deformations of the strip. The use of the device according to the invention allows, it is preferable to reduce the excess material required to ensure a minimum threshold thickness. The improved stability of the strip allows you to increase the speed of the production line, i.e. to increase the productivity and, consequently, lower costs. Withal�, the use of the device allows to improve the surface quality of the coating. The device according to the invention can be effectively adapted to the metal strips of different widths, which confirms its versatility from the point of view of operation.

The present invention also relates to an apparatus for coating metal strip 4, which contains at least one above described electromagnetic device 1 for the stabilization of the metal strip 4 at the time of its submission. The first embodiment of the device for coating according to the invention may be a similar device is shown schematically in Fig.1, an alternative embodiment of the device for coating according to the invention may be a similar device is shown schematically in Fig.2. In each embodiment of the apparatus for coating a block to remove excess coating. This block contains the gas knives and/or electromagnetic knives.

It is permitted to install the device 1 according to the invention on a support structure, which also carries the specified block to remove excess coating. Electromagnetic device 1 installed in the specified working position, can use sensors to determine the actual position of a metal strip 4 relative to the gas knives 5 and/or electro�etnich knife block to remove excess coating. Consequently, the knives can be zoom in/zoom out in accordance with the true position of the strip, thus achieving savings of gas when using a gas knife or power using electromagnetic knives.

If you are using a device for coating similar to that shown in Fig.2, the electromagnetic device 1 according to the invention can be placed under the crucible 111', with the tub 7, the molten metal is retained through magnetic levitation. This placement can reduce the vibration of the metal strip 4, caused by the intense magnetic fields required for levitation 7 baths of molten metal.

Proposed in the present invention a method for stabilizing and/or adjusting the deformation of the strip 4 made of a ferromagnetic material (e.g., metal strip) provides for the creation of the first independent magnetic fields, and the creation of the second independent magnetic fields in a mirrored arrangement with the first magnetic fields relative to a theoretical line 50 passing lanes 4. The method according to the invention, the transmission and distribution of the first magnetic field by the first means for transmission and distribution of magnetic fields with the aim of creating the first continuous magnet�CSOs fields distributed in the transverse direction 100' parallel to a specified band 4. The method according to the invention also provides transmission and distribution of the second magnetic field using the second means for transmission and distribution of magnetic fields to create a second continuous magnetic field distributed in a specified transverse direction mirror with one of the magnetic fields relative to a specified theoretical line 50 passing lanes 4.

Electromagnets comprising at least one core and one supplied with a current coil, generate a first magnetic field and second magnetic field. By applying an electrical current to the coil generates a magnetic field that is concentrated in the core of the corresponding electromagnet. Essentially, the individual supplied with a current coil are independent sources of magnetic fields that operate in a local area of space. By the first means and second means for transmission and distribution of magnetic fields of the first and second magnetic fields are essentially redistributed in space, creating, thus, the first source of forces, distributed in space (i.e., the first continuous magnetic field), and a second source of forces, distributed in space (i.e., the second continuous magnet�th field).

Feed bar 4 is located between two continuous magnetic fields generated in such a way that any point of its profile has been magnetized as a result of forces created by the continuous magnetic fields. Essentially, the magnetization of the strip 4 indicates the presence of the first and second magnetic fields that are generated by the first and second means transmission and distribution, respectively. The distribution of the forces acting on each point of the strip 4, depends on the intensity and direction continuous magnetic fields, created with funds transfer and distribution of the first and second magnetic fields generated by the electromagnets.

Undoubtedly, the electromagnetic device 1, versions of which are described above and shown in the drawings allows the method according to the invention. It should be noted that in the electromagnetic device 1, in particular, the first electromagnets 15, 15', 15", 15"' generate a first magnetic field, while the second electromagnets 16, 16', 16", 16"' generate a second magnetic field. The first connecting element 26 is a first means for transmission and distribution of magnetic fields. The second connecting element 26' in the mirror the location of the first element represents the second means to transfer and distribute�of magnetic fields.

It should be noted that the method according to the invention can be applied to stabilize the metal strip and to minimize deformation of a metal strip during its flow in the production process, and can also be used for intentional deformation of the strip (though not necessarily), to reduce and eliminate deformation of the strip made of ferromagnetic material.

1. An electromagnetic device (1) for stabilizing strip (4) of ferromagnetic material in the coating process, comprising:
- first electromagnets(15, 15', 15", 15"'), aligned in the transverse direction (100') parallel to theoretical line (50) passing lanes (4) and orthogonal to the direction of travel (100) stripes (4);
- second electromagnets(16, 16', 16", 16"') in a mirrored arrangement with the first electromagnets(15, 15', 15", 15"') relative to theoretical line (50) passing lanes (4),
moreover, each of these electromagnets, first and second electromagnets(15, 15', 15", 15"', 16, 16', 16", 16"'), contains a core with at least one pole(18, 18', 18"), and at least one supply coil(17, 17', 17"), wound around the specified at least one pole(18, 18', 18"), it (1) further comprises:
the first connecting element (26) made and� ferromagnetic material, which connects the cores of these first electromagnets(15, 15', 15", 15"');
the second connecting element (26') made of ferromagnetic material, which connects the cores of these second electromagnets(16, 16', 16", 16"'), the second connecting element (26') is essentially a mirror with the first connecting element (26) relative to a theoretical line (50) passing lanes (4) made of ferromagnetic material.

2. An electromagnetic device (1) according to claim 1, wherein each of the electromagnets, first and second electromagnets(15, 15', 15", 15"', 16, 16', 16", 16"'), contains:
- the first terminal (18);
- the second pole (18') located above the first pole (18);
- middle pole (18"), located between the first pole (18) and second pole (18');
- the yoke (19), which connects the first pole (18), the second pole (18') and middle pole (18");
moreover, the first connecting element (26) made of a ferromagnetic material, connects the secondary pole (18") of the first electromagnets(15, 15', 15", 15"'), and the second connecting element (26') made of a ferromagnetic material, connects the secondary pole (18") of the second electromagnets(16, 16', 16", 16"').

3. An electromagnetic device (1) according to claim 1 or 2, further comprising a plurality of position sensors configured to determine the position of the strip (4) with respect to theoretical plane (50) of displacement, with each feeding the coil (18, 18', 18") of each of the electromagnets(15, 15', 15", 15"', 16, 16', 16", 16"') power is supplied in accordance with the position of the strip (4) with respect to theoretical plane (50) of travel.

4. An electromagnetic device (1) according to claim 3, in which the sensors are located on opposite sides relative to theoretical plane (50) the movement of the strip (4) in such a way as to form a couple in a mirrored position relative to theoretical plane (50).

5. An electromagnetic device (1) according to claim 1, in which indicated at least one supply coil (17) is wound around the mean pole (18").

6. An electromagnetic device (1) according to claim 1, wherein each of the electromagnets(15, 15', 15", 15"', 16, 16', 16", 16"') contains:
- average supply coil (17) wound around the mean pole (18");
- first auxiliary supply coil (17'), is wound around the first pole (18);
- the second auxiliary supply coil (17"), is wound around the second pole (18').

7. An electromagnetic device (1) according to claim 1, wherein the length of the first and second connecting elements (26, 26') in the transverse direction (100') is greater than or equal to the length of the strip (4) in the transverse direction (100').

8. An electromagnetic device (1) according to claim 1, wherein the first and second connector�s elements (26, 26') are a core made of ferromagnetic material which is lamellar or nonlamellar, with a rectangular cross-section, and the rod has a cross section that is larger than or equal to one-fifth of the square of the length (32) of each of the middle pole (18"), connected by means of the specified terminal.

9. An electromagnetic device (1) according to claim 1, wherein the distance (35) from one of the connecting elements, the first and second connecting elements (26, 26') to that of theoretical line (50) passing lanes less than or equal to the distance (35') from the first pole (18) and second pole (18') to the same theoretical line (50) passing lanes, while the distance (35, 35') measured in a direction essentially orthogonal to theoretical line (50) passing lanes.

10. An electromagnetic device (1) according to claim 1, containing:
the first coupling piece (27) made of a ferromagnetic material which connects the separate yoke (19) of the first electromagnets(15, 15', 15", 15"');
the second coupling part (27') made of ferromagnetic material, which connects the separate yoke (19) of the second electromagnets(16, 16', 16", 16"').

11. An electromagnetic device (1) according to claim 10, wherein each of the connecting parts (27, 27') contents�t plate made from ferromagnetic material with a rectangular cross-section, and the height (37) of the cross section of each of the connecting parts (27, 27'), measured in a direction parallel to theoretical line (50) passing lanes, greater than or equal to the height of the connected yokes (19).

12. An electromagnetic device (1) according to claim 2, wherein the yoke (19) of the first electromagnets(15, 15', 15", 15"') and/or the yoke (19) of the second electromagnets(16, 16', 16", 16"') manufactured as one body (28).

13. System for coating of a molten metal on the strip (4) made of ferromagnetic material containing device (1) according to claim 1, which further comprises:
- the crucible (111) containing a bath (7) molten metal;
- block (5) to remove excess coating, located below in the course from the crucible (111);
- support structure for maintaining the crucible (111);
moreover, the specified device (1) placed on said support structure.

14. A system according to claim 13, in which the crucible (111') adapted to hold a bath of molten metal and an electromagnetic device (8) is arranged to hold a specified bath of molten metal within the crucible (111') and the crucible (111') has an inlet (9) to enter a metal strip (4) and an outlet for a metal strip located opposite the inlet opening (9), when it� device (1) is functionally placed near the inlet (9).

15. Method of stabilizing the position of the strip (4) of ferromagnetic material by means of the device according to claim 1 in the coating process, comprising stages on which:
- generate using the first of the first electromagnets independent of the magnetic field and using a second second electromagnets independent of the magnetic field in mirror arrangement with said first independent magnetic fields relative to theoretical line (50) passing lanes (4);
- convey and distribute the first magnetic field by a first connecting element to create a first continuous magnetic field distributed in the transverse direction (100') parallel to the strip;
- convey and distribute the second magnetic field using the second connecting element to create a second continuous magnetic field distributed in the transverse direction (100') mirror created with the first continuous magnetic field.

 

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