Iron core of electromagnetic stirrer

Abstract

The invention discloses an electromagnetic stirrer iron core which comprises an iron core body (15) with the axis being an arc line, and the iron core body (15) is arranged on an electromagnetic stirrer (10). The axis of the electromagnetic stirring iron core (15) is a circular arc line, and a generated magnetic field rotates around the circular arc line with a certain radius, so that alloy elements in alloy metal liquid can be uniformly distributed and are gradually crystallized by cooling, and crystal grains are refined.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic stirring, and particularly to an iron core of an electromagnetic stirrer. Background Art

[0002] In the prior art, in order to improve the density of the ingot grains in the casting machine of the steel industry, make the grains fine, increase the equiaxed crystals and reduce the columnar crystals. Especially when casting alloy materials, to make the alloy evenly and densely distributed in the ingot, a mold electromagnetic stirrer is added. The iron core of this electromagnetic stirrer has a straight axis, and the electromagnetic stirring magnetic field generated rotates around the straight axis. The axis of the mold is a straight line, and the ingot is a cylinder.

[0003] However, in the industries of electrician copper and aluminum rods (non-ferrous metals), the mold used is a crystallizing wheel. The ingot is in the crystallizing wheel, and the axis of the ingot is an arc of a certain radius. Through practical tests, it is proved that the electromagnetic stirrer with a straight iron core axis still fails to evenly distribute the alloy components in the ingot and cannot achieve the stirring effect. Even if it is very successful in steel, it still ends in failure. Summary of the Invention

[0004] The purpose of the present invention is to provide an iron core of an electromagnetic stirrer to solve the technical problem that the existing electromagnetic stirrer fails to evenly stir the alloy components of non-ferrous metal ingots, resulting in the alloy elements not being able to crystallize in a uniform state.

[0005] The present invention is realized by the following technical solutions: An iron core of an electromagnetic stirrer includes an iron core with an arc-shaped axis. The iron core is arranged on the stirrer, and the stirrer is an electromagnetic stirrer used to realize the stirring process before the casting of non-ferrous metals (such as copper and aluminum). Since during the process from the stirring process to the casting process of non-ferrous metals, some of the alloy elements that have been evenly distributed precipitate or float up again, which will cause the alloy elements to be unevenly distributed in the base material during the casting process, resulting in coarse grains and seriously affecting the mechanical properties and physical properties of the product. Therefore, it can generate a rotational motion driven by the magnetic field generated by the electromagnetic stirrer, making the alloy elements in the liquid evenly distributed, while cooling and gradually crystallizing, and making the grains refined. Since its stirring and crystallization are carried out simultaneously, the alloy elements crystallize in a uniform state, and thus the alloy elements in the internal alloy metal liquid still remain in a uniform state after cooling.

[0006] Further, the iron core includes multiple groups of iron sheet groups, and the multiple groups of iron sheet groups are closely attached to form an iron core with an arc-shaped axis.

[0007] Further, the iron sheet groups are connected by screws, and the multiple groups of iron sheet groups are connected by screws to form an iron core with an arc-shaped axis.

[0008] Furthermore, each group of iron sheets consists of multiple iron sheets. Each iron sheet has the same size and dimensions. Multiple iron sheets are tightly attached together by screws to form an iron sheet group, and then the iron sheet groups are connected to form an iron core with an arc-shaped axis.

[0009] Furthermore, a plurality of round holes are provided on the iron sheet. A screw is installed in the round hole, and the screw passes through the round hole to fasten the iron sheet.

[0010] Furthermore, the positions of the round holes opened in the same group of iron sheet groups are the same. A certain number of iron sheets are perforated at the same positions and connected by screws to form an iron sheet group; the positions of the round holes opened in different groups of iron sheet groups are different. Due to the different opening positions of different iron sheet groups, when multiple groups of iron sheet groups are connected, an iron core with an arc-shaped axis can be formed.

[0011] The beneficial effects of the present invention are as follows: The axis of the electromagnetic stirring iron core of the present invention is an arc-shaped line, and the generated magnetic field rotates around an arc-shaped line with a certain radius, which can make the alloy elements in the molten alloy liquid evenly distributed. At the same time, it cools and gradually crystallizes, and the grains are refined. Since its stirring and crystallization are carried out simultaneously, the alloy elements crystallize in a uniform state, so that the alloy elements in the molten alloy liquid still remain in a uniform state after cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0013] Figure 1 It is a schematic structural diagram of the present invention; Figure 2 It is a schematic structural diagram of an iron core with a straight axis; Figure 3 It is a front view of the present invention; Figure 4 It is a schematic structural diagram of an iron sheet; Figure 5 It is a connection relationship diagram between iron sheet groups; Figure 6 It is an installation position diagram of the present invention; In the figure, 1 - crystallization wheel, 2 - steel belt pulley, 3 - steel belt tensioning pulley, 4 - steel belt supporting pulley, 5 - steel belt pressing pulley, 6 - pressing arm, 7 - rotating shaft of the pressing arm, 8 - support frame, 9 - steel belt, 10 - stirrer, 11 - starter, 12 - casting machine box body, 13 - pouring port, 14 - ingot outlet, 15 - iron core, 16 - iron sheet, 17 - round hole, 18 - iron sheet group, 19 - screw. Specific embodiments

[0014] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and illustrated herein generally may be arranged and designed in a variety of different configurations.

[0015] It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0016] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0017] See Figures 1 to 6 , an iron core of an electromagnetic stirrer, including an iron core 15 whose axis is an arc line (specifically see Figure 1 ), the iron core 15 is arranged in the electromagnetic stirrer 10, and the electromagnetic stirrer 10 is arranged on the crystallization wheel of the casting machine. The iron core of the electromagnetic stirrer in the prior art is a straight line (specifically see Figure 2 ), and the electromagnetic stirring magnetic field generated by it rotates around the straight axis. The axis of the crystallizer is a straight line, and the ingot is a cylinder, which cannot meet the requirements for casting non-ferrous metal ingots.

[0018] In this embodiment, the iron core 15 includes multiple groups of iron sheet groups 18, and the iron sheet groups 18 are connected by screws 19. Each group of iron sheet groups 18 is composed of multiple iron sheets 16. In actual applications, the number of iron sheet groups 18 and the number of iron sheets 16 in each group of iron sheet groups 18 can be set according to actual needs. For example, 10 groups, 20 groups or 25 groups or more or fewer iron sheet groups 18 can be set, and 10 pieces, 15 pieces or 20 pieces or more or fewer iron sheets 16 can be set in each group of iron sheet groups 18. It is only necessary to meet the requirements for casting non-ferrous metal ingots.

[0019] In this embodiment, a plurality of round holes 17 are provided on the iron sheet 16, and the screw rod 19 passes through the round holes 17 to fasten the iron sheet 16. Specifically, the positions of the round holes 17 opened in the same iron sheet group 18 are the same. A certain number of iron sheets 16 are perforated at the same positions and connected by the screw rod 19 to form an iron sheet group 18; the positions of the round holes 17 opened in different iron sheet groups 18 are different. Since the opening positions of different iron sheet groups 18 are different, when multiple iron sheet groups 18 are connected (the connection relationship between the iron sheet groups 18 can be further referred to Figure 5 ), an iron core 15 with an arc-shaped axis can be formed. The magnetic field generated by it rotates around an arc line with a certain radius, which can make the alloy elements in the molten metal evenly distributed, and at the same time, it cools and gradually crystallizes, and the grains are refined. Since its stirring and crystallization are carried out synchronously, the alloy elements crystallize in a uniform state, so that the alloy elements inside the alloy metal liquid still remain in a uniform state after cooling.

[0020] Further referring to Figure 6 , the specific structure of the crystallization wheel casting machine is as follows: It includes a crystallization wheel 1 and a steel belt wheel 2 arranged on one side of the casting machine box body 12, and also includes a steel belt support wheel 4 and a steel belt pressing wheel 5 arranged above the crystallization wheel 1 and a steel belt tensioning wheel 3 arranged outside the casting machine box body 12. The rotation axes of the steel belt tensioning wheel 3 and the steel belt wheel 2 are located in the same horizontal plane and are fixed on the chute through a bracket, and the tension is ensured by the push of a cylinder. The crystallization wheel 1, the steel belt wheel 2, the steel belt tensioning wheel 3, the steel belt support wheel 4 and the steel belt pressing wheel 5 are all arranged in the same vertical plane. Among them, the crystallization wheel 1 and the steel belt wheel 2 are arranged on one side of the casting machine box body 12 through a rotating shaft, the steel belt support wheel 4 and the steel belt pressing wheel 5 are arranged on one side of the support frame 8, the support frame 8 is arranged above the casting machine box body 12, the steel belt support wheel 4 is connected to the support frame 8 through a rotating shaft, the steel belt pressing wheel 5 is connected to the support frame 8 through a pressing arm 6, one end of the pressing arm 6 is connected to the steel belt pressing wheel 5 through a rotating shaft, and the other end is connected to the support frame 8 through a pressing arm rotating shaft 7. The pressing arm 6 is also connected with a cylinder, and the pressing arm 6 can be driven by the cylinder to rotate around the pressing arm rotating shaft 7, so as to realize the rising and falling of the steel belt pressing wheel 5, and further enable the steel belt pressing wheel 5 to press the steel belt 9 against the crystallization wheel 1.

[0021] Nine sets of steel belts 9 are sleeved on the steel belt wheels 2, steel belt tensioning wheels 3, steel belt supporting wheels 4 and steel belt pressing wheels 5. The steel belt 9 starts from the steel belt wheel 2 and successively passes through the steel belt tensioning wheel 3, steel belt supporting wheel 4, steel belt pressing wheel 5 and crystallization wheel 1 and finally returns to the steel belt wheel 2. The inner side of the steel belt 9 contacts the rotating surfaces of the steel belt wheel 2, steel belt tensioning wheel 3, steel belt supporting wheel 4 and steel belt pressing wheel 5. The outer side of the steel belt 9 contacts the rotating surface of the crystallization wheel 1. A crystallization groove is provided on the rotating surface of the crystallization wheel 1. The steel belt 9 and the crystallization groove on the crystallization wheel 1 form a crystallization cavity. The inlet of the crystallization cavity is the pouring gate 13, and the outlet is the ingot outlet 14. The pouring gate 13 is located between the steel belt pressing wheel 5 and the crystallization wheel 1. The ingot outlet 14 is located between the steel belt wheel 2 and the crystallization wheel 1. The distance between the center of the outer circle surface of the steel belt wheel 2 and the center of the outer circle surface of the crystallization wheel 1 is slightly greater than the sum of the outer circle surface radii of the steel belt wheel 2 and the crystallization wheel 1. An anchor opener 11 is provided at the ingot outlet 14. A wedge block is provided on the anchor opener 11 and inserted into the crystallization groove of the crystallization wheel 1. The cooled and crystallized ingot is peeled off from the crystallization wheel 1 through the wedge block. The crystallization wheel 1 is driven by a motor and drives the steel belt 9, steel belt wheel 2, steel belt tensioning wheel 3, steel belt supporting wheel 4 and steel belt pressing wheel 5 to move.

[0022] The crystallization cavity is divided into a stirring section and a crystallization section. The stirring section is located in the front section of the crystallization cavity. An electromagnetic stirrer 10 (a iron core 15 with an arc-shaped axis is arranged inside the electromagnetic stirrer 10) is provided on the outer side of the stirring section. The electromagnetic stirrer 10 is arranged at the rear side of the steel belt pressing wheel 5 and is located between the crystallization wheel 1 and the pressing arm rotating shaft 7. The steel belt supporting wheel 4 jacks up the steel belt 9 between the steel belt tensioning wheel 3 and the steel belt pressing wheel 5, so as to reserve enough space for the pressing arm rotating shaft 7 and the electromagnetic stirrer 10. The alloy metal liquid enters the crystallization cavity from the pouring gate 13, passes through the steel belt pressing wheel 5 and enters the stirring section, and is stirred by the electromagnetic stirrer 10 (since the magnetic field generated by the iron core 15 with an arc-shaped axis makes a rotational movement around an arc line of a certain radius, the alloy elements in the alloy metal liquid can be evenly distributed, and at the same time, it is gradually cooled and crystallized, and the crystal grains are refined, so as to meet the requirements for casting ingots of non-ferrous metals). After the alloy metal liquid leaves the electromagnetic stirrer 10, it enters the crystallization section. A cooling device (not shown in the figure) is provided at the corresponding position outside the crystallization wheel 1 in the crystallization section. Usually, the cooling device includes several nozzles pointing to the crystallization wheel 1, and coolant is sprayed onto the crystallization wheel 1 through the nozzles. Since the alloy metal liquid is stirred by the electromagnetic stirrer 10 at the pouring gate 13, the distribution of its alloy elements is more uniform than that in the prior art.

[0023] It should be noted that the terms "connected" and "arranged" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "connected" or "arranged" may explicitly or implicitly include one or more of such features. Moreover, terms such as "connected" and "arranged" are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. And for the foregoing embodiments, for the sake of simplicity of description, they are all expressed as a series of combinations of actions. However, those skilled in the art should know that the present application is not limited by the described order of actions, because according to the present application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the present application.

[0024] In the above embodiments, the basic principles, main features and advantages of the present invention are described. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, any modifications and changes made by those skilled in the art that do not depart from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. An electromagnetic stirrer iron core, characterized in that, It includes an iron core (15) with an arc-shaped axis, and the iron core (15) is arranged on an electromagnetic stirrer (10).

2. The electromagnetic stirrer core according to claim 1, characterized in that, The iron core (15) includes multiple groups of iron sheets (18).

3. The electromagnetic stirrer core according to claim 2, wherein, The iron sheet groups (18) are connected by screws (19).

4. An electromagnetic stirrer iron core according to claim 3, characterized in that, Each group of iron sheets (18) is composed of multiple iron sheets (16).

5. An iron core of an electromagnetic stirrer according to claim 4, characterized in that, A plurality of round holes (17) are arranged on the iron sheets (16), and the screws (19) pass through the round holes (17) to fasten the iron sheets (16).

6. The electromagnetic stirrer core according to claim 4, wherein, The positions of the round holes (17) opened in the same group of iron sheet groups (18) are the same; the positions of the round holes (17) opened in different groups of iron sheet groups (18) are different.

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