KR20060103384A - Iron core - Google Patents

Abstract

Since the core type iron core having the "c" shape used in the transformer, rectifier, and lamp is symmetrically pressed out to form, it prevents material loss due to scrap, and the concavities and convexities are formed on the opposite side of the core core simultaneously. The core core to be laminated without a separate coupling means to be used by simply connecting the irregularities,

The core core according to the present invention has a cross-sectional shape in which a first protrusion, a second protrusion extending from the first protrusion and having a relatively shorter length than the first protrusion, and a first protrusion is formed between the first protrusion and the second protrusion. The first core core having the eccentric c-shape,

The third and second projections formed to correspond to the first projection grooves, the fourth projections extending from the third projections and having a relatively longer length than the third projections, and the second projection grooves corresponding to the second projections are the third and fourth projections. A second core iron core formed between the protrusions and formed in a U-shape having an eccentric cross section;

A pair of first and second core iron cores having a symmetrical U-shaped eccentric shape are formed to prevent scraping of the raw materials during press punching molding from the raw materials.

 Core iron core, lamination, mould, press punching

Description

Core core

1 is a schematic view showing forming a core from a silicon steel sheet according to the prior art;

2 is a perspective view of a core core according to the present invention;

3 is a state in which a molded core according to the present invention is laminated;

4 is a schematic view showing forming a core from a silicon steel sheet according to the present invention;

Figure 5 is a schematic diagram showing the core core arrangement arrangement to be used as a small transformer by closely contacting a pair of core cores formed in accordance with the present invention in parallel.

* Explanation of symbols used in the main part of the drawing

10; Core 1 core

 11; First protrusion

 12; 2nd protrusion

 13; No. 1 Home

 14,24; Groove

 15,25; projection part

 16,26; Piercing part

20; Core 2 Core

 21; 3rd protrusion

 22; 4th protrusion

 23; 2nd groove

In the present invention, when the core is cored from a thin silicon steel sheet by press mold, the core of the core having an eccentric "c" shape without the loss of raw materials (referred to be scrap) is formed. The present invention relates to a core iron core which can be continuously manufactured and can be molded at the same time to improve the assemblability.

More specifically, the eccentric "c" shaped core core used in a transformer, rectifier, lamp, etc. is symmetrically pressed out to form a material to prevent material loss due to scrap, and on the opposite side of the core core. Since the concavities and convexities are formed at the same time, the present invention relates to a core iron core that can be used by easily concavely convex convex core cores stacked without a separate joining means.

As shown in FIG. 1, the core core according to the related art has a core iron core having a "c" shape by punching a press die (not shown) on a thin sheet of silicon steel sheet 1 that is continuously fed ( 2) In the case of shaping, the excess portion discarded as the scrap 3 except the core iron core 2 formed from the silicon steel sheet 1 and the space located in the left and right directions of the adjacent core iron core 2 and up and down The cost is increased due to the expensive silicon steel sheet, so that the price competitiveness of the product (named transformer, etc.) in which the core core 2 is embedded is reduced.

In addition, a separate process for joining and fusion of the core core 2 in order to stack the core core 2 formed as described above to be used in a predetermined number of sheets is added, thereby reducing workability and productivity. As the fusion site cuts off the flow of electrical characteristics, or the fusion site acts as one interference factor, thereby deteriorating the electrical characteristics, thereby deteriorating the quality and reliability of the product.

An object of the present invention is to form a core core formed from a thin silicon steel sheet to have an eccentric "c" shape, so that the scrap of expensive silicon steel sheet when the core core is punched out by a press die It is to provide a core core that can be made competitive by preventing cost reduction.

Another object of the present invention is that when the core core core from the silicon steel sheet is formed at the same time the coupling means of the core core is molded at the same time can easily assemble the core core to be laminated, the process of fusion welding core core is unnecessary and the magnetic flux density is increased It is to provide a core core to improve the reliability of the product by improving the electrical characteristics of the core core.

The object of the present invention described above is a cross-sectional shape in which a first protrusion, a second protrusion extending from the first protrusion and having a relatively shorter length than the first protrusion, and a first protrusion is formed between the first protrusion and the second protrusion. The first core core having the eccentric c-shape,

The third and second projections formed to correspond to the first projection grooves, the fourth projections extending from the third projections and having a relatively longer length than the third projections, and the second projection grooves corresponding to the second projections are the third and fourth projections. A second core iron core formed between the protrusions and formed in a U-shape having an eccentric cross section;

It is achieved by providing a core iron core which is formed to be symmetrically formed to prevent the scraping of the raw material at the same time press-molding a pair of first, second core iron core having an eccentric c-shape from the raw material.

According to a preferred embodiment, the grooves are formed on the outer surface of the first protrusion and the fourth protrusion, and the protrusions formed to correspond to the grooves and fitted into the grooves are formed on the outer surfaces of the second protrusion and the third protrusion. .

The apparatus may further include a piercing part formed on the first and second core cores so that the first and second core cores may be stacked in a predetermined number after press punch molding.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to describe in detail enough to enable those skilled in the art to easily practice the invention, and therefore It does not mean that the technical spirit and scope of the present invention is limited.

As shown in Figs. 2 to 4, the core core according to the present invention presses the core for cores from a silicon steel sheet of a thin plate having a predetermined thickness (generally, 0.5 mm or 0.3 to 0.35 mm is used). The core core is formed into an eccentric "c" shape to prevent scraping of the raw material 30 when punching out by a mold (not shown). A first protrusion 11, a second protrusion 12 extending from the first protrusion 11 and having a relatively shorter length than the first protrusion 11, and between the first and second protrusions 11 and 12; A first core iron core 10 having a “c” shape having an eccentric cross-sectional shape and having a first groove 13 formed therein;

The third protrusion 21 formed to correspond to the first protrusion groove 13 described above, and the fourth protrusion 22 extending longer in the third protrusion 21 and having a relatively longer length than the third protrusion 21. And a second core iron core having a second projection groove 23 corresponding to the second projection 12 formed between the third and fourth projections 21 and 22 to have an eccentric shape of the cross section. 20 is provided.

At this time, the grooves 14 and 24 are formed on the outer surfaces of the above-described first protrusion 11 and the fourth protrusion 22 and are formed to correspond to the grooves 14 and 24 to fit the grooves 14 and 24. Protruding portions 15 and 25 are formed on the outer surfaces of the second protrusion 12 and the third protrusion 21. Also, at least two or more first and second core iron cores 10 and 20 may be stacked on the first and second core iron cores 10 and 20 so as to be stacked by a predetermined number after punch molding by press mold (not shown). Piercing parts 16 and 26 are further provided.

In the drawings, reference numeral 17 denotes a groove (a die of a mold passes) formed on an outer surface of the first core core 10 so that the groove 14 may be molded out by a press die in the first protrusion 11. 18 is a groove formed when punching out the protrusion 25 of the third protrusion 21 from the first core core 10, and 27 is a recess formed in the fourth protrusion 22 by the press mold. The groove is formed in the outer surface of the second core core 20 so as to be formed (die die is passed), 28 is a projection of the projection 15 of the second projection 12 from the second core core 20 It is a groove formed during molding.

Hereinafter, a use example of the core core according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 4, when punching out the core core using the raw material 30 transferred to the press mold (not shown) by the transfer means, the core core is shaped to have an eccentric "-" shape. Accordingly, it is possible to prevent the raw material 30 due to the core core molding is scraped and lost.

In more detail, the raw material 30 has an "c" shape eccentrically driven by driving a press die having dies (not shown) corresponding to the shapes of the first and second core iron cores 10 and 20. First and second core iron cores 10 and 20 are press-cut molded.

That is, the third projection 21 of the second core iron core 20 is formed by the injection molding of the first projection groove 13 formed between the first and second protrusions 11 and 12 of the first core iron core 10. Is formed by injection molding, and the second projection of the first core iron core 10 is formed by the injection molding of the second projection groove 23 formed between the third and fourth protrusions 21 and 22 of the second core iron core 20. (12) is injection molded.

Meanwhile, from the raw material 30 having a predetermined width w, the first and second core iron cores 10 and 20 having a "a" size in the left and right widths are punched out in a "c" shape eccentrically formed by a press die. Therefore, the scraping of the raw material 30 can be prevented. At this time, only the scraps generated by the projections 17 and 27 formed on the outer surfaces of the first and second core iron cores 10 and 20 are generated.

Therefore, it is possible to reduce the cost cost by preventing scraping of the raw material 30 when the first and second core iron cores 10 and 20 are cast out from the raw material 30 which is a thin silicon steel sheet material.

On the other hand, as shown in Figure 3, the core formed by the present invention can be easily bonded after stacking the core core core in a predetermined number of sheets. That is, the first and second core cores 10 and 20 may be easily stacked by the piercing portions 16 and 26 formed on the first and second core iron cores 10 and 20. In addition, when the first and second core iron cores 10 and 20 are punched out from the raw material 30, the grooves 14 and 24 for coupling to the outer surface (referring to the boundary surface) of the first and second core iron cores 10 and 20 are formed. And projections 15 and 25 having a shape corresponding thereto are cast out at the same time.

Therefore, the first and second core cores 10 and 20 to be stacked can be easily combined and used without a separate coupling means. In this case, the coils of the first and second cores 10 and 20 are wound in a radial direction to be embedded in a rectifier and the like, and thus description thereof will be omitted.

On the other hand, as shown in Figure 5, the core core according to the present invention, the first and second core core (10, 20) formed by punching out from the raw material 30 by stacking a predetermined number of grooves (14, 24) And a pair of first and second core iron cores 10 and 20, which are integrally coupled to each other due to the fitting of the protrusions 15 and 25, in close contact with each other, so that the coil is wound, as a core iron core embedded in a small transformer or the like. Of course it can be used. At this time, the magnetic flux density is relatively higher due to the formation of a smooth magnetic field by the coil than the core core combined with the E-type core and the I-type core used in the related art, and of course, the electrical characteristics can be improved.

As described above, the core core according to the present invention has the following advantages.

The core core formed from the thin silicon steel sheet is shaped to have an eccentric "c" shape, thereby reducing the cost cost by preventing expensive silicon steel sheet from being scrapped when the core core is pressed out by the press die. Therefore, it has a competitive edge in the core core products (transformers, ballasts, etc.).

In addition, when the core core is spun from the silicon steel sheet, the coupling means of the core core are molded at the same time, so that the core cores stacked can be easily assembled. This improves the quality and reliability of the product at the same time.

Claims (3)

A c-shaped shape having an eccentric cross-sectional shape is formed by forming a first protrusion, a second protrusion extending from the first protrusion and having a relatively shorter length than the first protrusion, and a first protrusion groove formed between the first protrusion and the second protrusion. Having a first core iron core; And A third protrusion formed to correspond to the first protrusion groove, a fourth protrusion extending from the third protrusion and having a relatively longer length than the third protrusion, and a second protrusion corresponding to the second protrusion. A second core iron core formed between the 3 and 4 protrusions and formed into a U shape having an eccentric cross section; A core iron core which is formed in a symmetrical form to prevent a pair of first and second core iron cores having an eccentric c-shape from the raw material at the same time to prevent the scrap of the raw material during press punching molding. The groove of claim 1, wherein the groove is formed on the outer surfaces of the first and fourth protrusions, and the protrusions formed to correspond to the grooves and fitted into the grooves are formed on the outer surfaces of the second and third protrusions. Core iron core, characterized in that. The core core according to claim 1 or 2, further comprising a piercing portion formed on the first and second core cores to stack the first and second core cores in a predetermined number after press punch molding.

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