KR102233624B1 - Emmbossing Forming Apparatus For Grain Oriented Steel, Embossing Forming Method, And Laminar Sheet Using The Smae - Google Patents

Abstract

According to the present invention, disclosed are an embossing processing apparatus for manufacturing a laminating core using a directional steel sheet, capable of forming an interlock protrusion for coupling layers of thin plates forming a laminating core while having a directional steel sheet material, on the directional steel sheet material for manufacturing a laminating core, an embossing processing method and a thin plate for manufacturing a laminating core using the same. According to the present invention, the embossing processing apparatus forms a full section, which is vertical to the surface of the directional steel sheet while being orthogonal to a rolling direction of the directional steel sheet, on the edge of the interlock protrusion. According to the present invention, since the size of an interlock protrusion, which couples layers of laminar members in a laminating core manufactured of a directional steel sheet, can be precisely regulated, the present invention can stably apply an interlayer coupling force and prevent an interface between layers of a laminating core from being opened or prevent the laminating core from being separated.

Description

[Emmbossing Forming Apparatus For Grain Oriented Steel, Embossing Forming Method, And Laminar Sheet Using The Smae}

The present invention relates to an embossing processing apparatus and an embossing method for manufacturing a laminated core, and a thin plate for manufacturing a laminated core using the same, and more specifically, to stably maintain interlayer bonding of a lamina member (lamina sheet) by an interlock protrusion. The present invention relates to an embossing apparatus and an embossing method for a grain-oriented steel sheet capable of precisely regulating the size of an interlock protrusion, and a thin plate for manufacturing a laminated core using the same.

In general, an iron core, that is, a component called a core, is used in a spark plug or a rotating device such as a motor or a generator. In recent years, a thin plate (thin plate) processed into a predetermined shape, that is, a core (laminated core) having a structure in which lamina members are stacked in a stacked form and integrated into a single block, that is, a block type, has been used. .

In order to manufacture the laminated core, after the divided core forming a part of the finished product core is manufactured, the divided cores are combined with each other to form a single finished product core.

The method of manufacturing the above-described laminated core, that is, the laminated core manufacturing method of laminating/integrating the lamina member, includes a tab fixing method using an interlock tab, that is, an interlock projection, a welding fixing method using, for example, laser welding, a rivet fixing method, etc. This is known.

As another example of manufacturing the above-described laminated core, a technology for implementing interlayer bonding of lamina members through an adhesive method has been developed/used. For example, the invention of manufacturing a laminated core by applying an adhesive to the surface of a metal strip supplied to an apparatus (mold) for manufacturing a laminated core and punching the metal strip is disclosed in Korean Patent No. 10-1566491 and Japanese Patent Laid-Open Publications. It is disclosed in patent documents, such as Japanese Unexamined-Japanese-Patent No. 5-304037 and Japanese Unexamined-Japanese-Patent No. 2009-297758.

The above-described lamina members are stacked in a vertical direction in an inner space (lamination hole) of a lamination unit, that is, a laminate unit, and are integrated by a predetermined number.

Meanwhile, the above-described spark plug core, that is, an ignition core, is a core used in a spark plug of an automobile, that is, a core for an ignition coil, and an engine of a vehicle such as a gasoline engine requires a separate ignition device for combustion of fuel.

The ignition device includes a spark plug that is combined in a combustion chamber of a gasoline engine and spatters a spark to compress the mixed gas in the combustion chamber of the gasoline engine, and a switching operation that is attached to the driver's seat and intercepts the current in the ignition device circuit to start or stop the gasoline engine. And an ignition coil that is operated according to a switching operation of the ignition switch and induces a low voltage of a battery or a generator to a high voltage so that the ignition plug emits a strong spark.

The above-described ignition coil plays a role of generating a high voltage current capable of burning the compressed mixer in the cylinder by causing spark discharge to the spark plug.The ignition coil generating a high voltage current required for ignition has low electromotive force. And a primary coil for generating a, and a secondary coil for generating a high current by causing a mutual induction action therewith, and the primary and secondary coils are wound around the ignition core.

Referring to FIG. 1, the ignition core includes a center core 10 on which a primary coil is wound (also referred to as a pencil core) and a side core on which a secondary coil is wound, and the side core is an LV core 21, Low Voltage Core) and HV core (High Voltage Core, 22), and a magnet 30 is provided inside the core.

The above-described various types of cores may be implemented as a core manufactured by lamination bonding of lamina members, that is, a lamination core type. For interlayer bonding of the lamina members (thin plates), the lamina members are pressed by pressing one side of the lamina member. It has an interlock protrusion (also referred to as an interlock tab or caulking) protruding to the side.

The interlocking method using the above-described interlock protrusion itself is known in a number of patent documents, and a groove is formed on one side of the thin plate, that is, the lamina member, and an interlock protrusion is formed on the other side, thereby interlocking the lamina member. The protrusion is forcibly fitted into the groove of another lamina member to realize interlayer bonding.

Registered Korean Patent No. 10-1724119, magnetic core for automobile ignition coil and its manufacturing method, on March 31, 2017 Registered Korean Patent No. 10-1881257, laminated core and its manufacturing method, on July 17, 2018

The present invention, in order to stably maintain interlayer bonding between lamina members by interlock protrusions, an embossing apparatus and an embossing method for a grain-oriented steel sheet capable of precisely regulating the size of the interlock protrusions, and a thin plate for manufacturing a laminated core using the same. B member), more specifically, to provide a laminated core manufacturing apparatus, a laminated core manufacturing method, and a lamina member for manufacturing a laminated core.

One aspect of the present invention is an embossing apparatus for manufacturing a laminated core using a grain-oriented steel plate that has a grain-oriented steel plate material and forms an interlock protrusion for interlayer bonding of thin plates forming a laminated core on the grain-oriented steel plate material for producing the laminated core, that is, for grain-oriented steel plate. It provides an embossing processing device.

The embossing apparatus for manufacturing a laminated core using the grain-oriented steel sheet is a device for manufacturing a thin sheet of a laminated core having interlock protrusions for interlocking by processing a grain-oriented steel plate, that is, a laminated sheet. An apparatus for performing an embossing process on a grain-oriented steel sheet material in a core manufacturing process, and a more specific example is an example of an apparatus used to manufacture a core for a spark plug.

The embossing apparatus includes: an embossing punch for locally pressing one side of the grain-oriented steel plate material to protrude the interlock protrusion on the other side of the grain-oriented steel plate material; And an embossing die having a forming groove facing the front end of the embossing punch, and supporting the other side of the grain-oriented steel plate material for forming the interlock protrusion.

And the punch tip forming the front end of the embossing punch, in order to form a shear surface perpendicular to the rolling direction of the grain-oriented steel plate material on the edge of the interlock protrusion and perpendicular to the surface of the grain-oriented steel plate material, the edge of the punch tip In order to form a shearing part formed locally and having a shear edge perpendicular to the rolling direction of the oriented steel sheet material, and an inclined surface connecting the interlock protrusion and the directional material to the rim of the interlock protrusion, It includes an inclined forming portion formed of.

The interlock punch and the forming groove form a pair; A plurality of the interlock punches are provided to be elevating at different positions, and a plurality of interlock protrusions having a pair of shear surfaces that are orthogonal to the rolling direction of the oriented steel sheet material and parallel to each other are formed on the oriented steel sheet material.

Another aspect of the present invention is an embossing method for a grain-oriented steel plate in which an interlock protrusion for interlayer bonding of thin plates forming a laminated core having a grain-oriented steel plate material is formed on the grain-oriented steel plate material for manufacturing the laminated core. The interlock protrusion having a shear surface perpendicular to the rolling direction of the grain-oriented steel plate material by locally pressing the side surface and a shear surface perpendicular to the surface of the grain-oriented steel plate material, and an inclined surface preventing the interlock protrusion from being separated from the grain-oriented steel plate material It provides an embossing method for a grain-oriented steel plate comprising the step of embossing to protrude from the other side of the grain-oriented steel plate material.

The embossing method for a grain-oriented steel plate is a process technology for manufacturing a thin plate (lamina member) having interlock protrusions for interlocking by processing a grain-oriented steel plate, that is, performing an embossing process on a grain-oriented steel plate material, and a more specific example is This invention is applied to the manufacturing process of the spark plug core.

The embossing process step; Including the step of forming a plurality of rectangular interlock protrusions crossing at right angles with each other in the major axis direction at different positions, and for interlock protrusions in which the major axis direction is parallel to the rolling direction of the oriented steel sheet material, both ends of the major axis direction among the interlock protrusions A shear surface perpendicular to the major axis direction is formed, and for the interlock protrusions whose major axis direction is perpendicular to the rolling direction of the oriented steel sheet material, shear surfaces parallel to the major axis direction are formed at both ends of the minor axis direction.

Another aspect of the present invention is a laminated core manufacturing thin plate, that is, a lamina member, which is made of a grain-oriented steel plate material to form a laminated core, and has a plurality of interlock protrusions for interlayer bonding; The interlock protrusions are formed to protrude from one side of the thin plate to the other side; The rim of the interlock protrusion has shear surfaces perpendicular to the rolling direction of the oriented steel sheet material and perpendicular to the surface of the oriented steel sheet material, and inclined surfaces preventing the interlock protrusion from being separated from the oriented steel sheet material. It provides a thin plate for manufacturing a laminated core made of.

In the present invention, since the size of the interlock protrusions connecting the layers of the lamina members in the laminated core made of the grain-oriented steel plate material can be precisely regulated, the interlocking force of the lamina members can be stably imparted, and It is possible to prevent the interlayer interface from spreading or the interfacial division of the laminated core.

Features and advantages of the present invention may be better understood with reference to the drawings described below along with a detailed description of embodiments of the present invention described below, among the drawings:
1 is a perspective view showing an example of a stacked core of an ignition coil (a stacked core for an ignition plug);
2 is a plan view showing an example of a thin plate for manufacturing a laminated core having interlock protrusions molded by the embossing apparatus according to the present invention;
3 is a cross-sectional view illustrating the structure of an interlock protrusion perpendicular to the shear plane;
4 is a cross-sectional view and a longitudinal cross-sectional view of an embossing apparatus according to an embodiment of the present invention;
5 is a cross-sectional view illustrating an embossing process (molding of an interlock protrusion) using the embossing apparatus shown in FIG. 4;
6 is a cross-sectional view illustrating a laminated bonding state of thin plates (lamina members) manufactured by the embossing apparatus shown in FIG. 4;
7 is a cross-sectional view and a longitudinal cross-sectional view of an embossing apparatus according to another embodiment of the present invention;
8 is a cross-sectional view illustrating an embossing process (molding of an interlock protrusion) using the embossing apparatus shown in FIG. 7; And
9 is a cross-sectional view illustrating a laminated bonding state of thin plates (lamina members) manufactured by the embossing apparatus shown in FIG. 7;

Hereinafter, preferred embodiments of the present invention in which the object of the present invention can be realized in detail will be described with reference to the accompanying drawings. In describing the present embodiment, the same name and the same reference numerals are used for the same configuration, and additional descriptions thereof will be omitted below. In addition, descriptions are omitted or minimized for techniques already known in the art.

Terms used in the present specification are used to describe embodiments of the present invention and are not intended to limit the present invention. For example, terms including ordinal numbers such as "first" and "second" may be used to distinguish each other when describing elements of the same name, but do not define or limit the number of elements.

And when a component is referred to as being "connected", "connected" or "coupled" to another component, it may be directly connected to or connected to or coupled to the other component. In other words, it should be understood that it includes a connection relationship in which other components exist in the middle, that is, a relationship that is indirectly connected.

In the present specification, terms such as "include" or "have" mean the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, and one or more other features. It is to be understood that the presence or addition of numbers, steps, actions, components, parts, or combinations thereof does not exclude the possibility of addition.

One aspect of the present invention is an embossing apparatus for manufacturing a laminated core using a grain-oriented steel plate that has a grain-oriented steel plate material and forms an interlock protrusion for interlayer bonding of thin plates forming a laminated core on the grain-oriented steel plate material for producing the laminated core, that is, for grain-oriented steel plate. It is an embossing processing device.

The embossing apparatus for manufacturing a laminated core using the grain-oriented steel sheet is a device for manufacturing a thin sheet of a laminated core having interlock protrusions for interlocking by processing a grain-oriented steel plate, that is, a laminated sheet. An apparatus for performing an embossing process on a grain-oriented steel sheet material in a core manufacturing process, and a more specific example is an example of an apparatus used to manufacture a core for a spark plug.

The embossing apparatus described in the embodiment of the present invention forms lamina members having a predetermined shape by blanking a strip-shaped grain-oriented steel sheet material that is continuously conveyed, and by integrating the lamina members, a motor, a generator or a transformer Alternatively, it may be applied as a part of a press-based laminated core manufacturing device that sequentially and continuously manufactures cores such as ignition coils, that is, a progressive mold, so that interlock tabs, that is, interlock projections, can be formed on the direction steel sheet material that is continuously conveyed. have.

In other words, by installing the embossing device upstream of the blanking region forming a thin plate of a predetermined shape, that is, a lamina member by blanking the grain-oriented steel plate material, interlock projections are formed every time the grain-oriented steel plate material moves by one pitch. I can.

Of course, the embossing apparatus described in the present specification may be applied as a device for forming interlock projections on the thin plate after forming a thin plate (a sheet of grain-oriented steel plate material constituting one layer of the core) by blanking, The laminated core may be manufactured by laminating the thin plates formed with the interlock protrusions to a predetermined thickness and then pressing for interlayer bonding.

One aspect of the present invention provides an embossing apparatus for manufacturing a laminated core using a grain-oriented steel plate that has a grain-oriented steel plate material and forms an interlock protrusion for interlayer bonding of thin plates forming a laminated core on the grain-oriented steel plate material for producing a laminated core.

The embossing apparatus for manufacturing a laminated core using the grain-oriented steel sheet is a device for manufacturing a thin sheet of a laminated core having interlock protrusions for interlocking by processing a grain-oriented steel plate, that is, a laminated sheet. A device for performing an embossing process on a grain-oriented steel sheet material in a core manufacturing process, and a more specific example is a device used to manufacture a spark plug core.

First, an embossing apparatus according to an embodiment and a method of embossing (molding the interlock protrusion) using the same will be described with reference to FIGS. 2 to 5. FIG. 2 is a plan view showing an example of a thin plate for manufacturing a laminated core having interlock protrusions molded by the embossing apparatus according to the present invention, and FIG. 3 is a cross-sectional view illustrating the structure of an interlock protrusion perpendicular to a shear surface, and FIG. 4 Is a cross-sectional view and a longitudinal sectional view of an embossing apparatus according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view illustrating an embossing process (molding an interlock protrusion) using the embossing apparatus shown in FIG. 4, and FIG. It is a cross-sectional view illustrating a laminated bonding state of thin plates (lamina members) manufactured by the embossing apparatus shown in FIG. 4.

2 to 6, an embossing apparatus according to an embodiment of the present invention includes an embossing punch 110 and an embossing die 120.

The embossing punch 110 locally presses one side of the grain-oriented steel plate material S to protrude the interlock protrusion 50 on the other side of the grain-oriented steel plate material S.

In addition, the embossing die 120 has a forming groove 121 facing the front end of the embossing punch 110, and supports the other side of the grain-oriented steel sheet material S for forming the interlock protrusion 50. .

In this embodiment, the embossing punch 110 presses the upper surface of the grain-oriented steel sheet material S, and the embossing die 120 supports the bottom surface (bottom surface) of the grain-oriented steel sheet material S.

More specifically, the embossing punch 110 is provided so as to be elevated on the upper side of the embossing die 120, and when the embossing punch 110 presses the grain-oriented steel plate material S, the grain-oriented steel plate material The interlock protrusion 50 is protruded on the bottom surface of (S), and a groove 60 is formed on the upper surface of the grain-oriented steel sheet material S.

The embossing punch 110 may be provided on an upper mold (not shown) of an elevating press device, and the embossing die 120 may be provided on a lower mold (not shown) facing the upper mold described above. have. Of course, a blanking punch for forming a lamina member is provided in the upper mold, and a blanking die facing the blanking punch is provided in the lower mold, so that it can be implemented as a progressive mold-type stacked core manufacturing apparatus.

And, more specifically, the grain-oriented steel sheet material (S) described above, the grain-oriented electrical steel sheet is used as an iron core (core) material such as a transformer, motor, or ignition coil, and has excellent electromagnetic properties in two directions, a right angle to the rolling direction and the rolling direction. Has.

In embodiments of the embossing apparatus according to the present invention, the grain-oriented steel sheet material S is a structure based on the difference in elongation according to the direction, and is perpendicular to the plane direction of the material S when forming the interlock protrusion 50 and is rolled. It is a structure in which the front end surface 50a perpendicular to the direction is formed on both edges of the interlock protrusion 50.

In a grain-oriented steel sheet material, the elongation is different in the rolling direction (L direction) and the right angle direction (C direction), and the elongation in the C direction is higher than in the L direction. In order to fasten the thin plates with a stable force using the interlock protrusion 50, it is preferable that the protrusion of the interlock protrusion 50 is greater than the thickness of the material, and the groove 60 formed on the surface of the grain-oriented steel plate material by embossing The distance L1 between the two front ends 60a and the distance L2 between the front ends 50a forming both edges of the interlock protrusion 50 have the greatest effect on the fastening force between the thin plates 1.

At this time, the distance L2 between the shear surfaces 50a forming both edges of the interlock protrusion 50 is stably regulated in size due to the forming groove 121 of the embossing die, but is formed on the surface of the grain-oriented steel plate material. It is difficult to regulate the distance L1 between the front end surfaces 60a on both sides of the groove 60, and when the dimension of L1 increases, the fastening force between the thin plates 1 by the interlock protrusion 50 is weakened. The groove 60 formed on the surface of the grain-oriented steel plate material is a portion in which the interlock protrusions of other thin plates are fitted.

The present invention discloses an embossing apparatus having a structure of forming a shear surface 50a perpendicular to the surface direction of the material and perpendicular to the rolling direction at both edges of the interlock protrusion 50 as described above, and accordingly the dimension of L1 It should be prevented from increasing by elongation.

To this end, the punch tip 111 constituting the front end of the embossing punch 110 includes a shearing portion 111a having a shearing edge and an inclined forming portion 111b.

In order to form a shear surface (50a) perpendicular to the rolling direction of the grain-oriented steel plate material S at the edge of the interlock protrusion 50 and perpendicular to the surface of the grain-oriented steel plate material, It is formed locally on the edge of the punch tip 111. More specifically, the shearing portions 111a are formed on both edges of the punch tip 111 that are perpendicular to the rolling direction of the grain-oriented steel sheet material S.

The shear processing part 111b has a structure in which a side surface and a front end surface of the punch tip 111 are at a right angle or an acute angle, and the inclined part 111b has a structure in which an inclined surface is formed at the edge of the punch tip 111.

And the inclined forming part 111b, in order to form the inclined surface 50b connecting the interlock protrusion 50 and the directional material on the rim of the interlock protrusion 50, more specifically the rim of the punch tip 111 It is formed on two edges located on opposite sides of each other, and prevents the interlock protrusion 50 from being completely sheared from the material (S).

The interlock punch 110 and the forming groove 121 form a pair. A plurality of the interlock punches 110 are installed to be elevating at different positions, the interlock protrusion 50 having a pair of shear surfaces 50a parallel to each other and perpendicular to the rolling direction of the oriented steel sheet material S To form a plurality of the grain-oriented steel plate material.

Accordingly, according to the present invention, a thin plate for manufacturing a laminated core (1), that is, a lamina member, more specifically, a lamina member, which is made of a grain-oriented steel plate material to form a laminated core and in which a plurality of interlock protrusions for interlayer bonding are formed, and more specifically, the interlock Protrusions are formed protruding from one side of the thin plate 1 to the other side, and at the rims of each of the interlock protrusions 50, shear surfaces 50a perpendicular to the rolling direction and perpendicular to the surface of the oriented steel plate material and , A thin plate for manufacturing a laminate core having a structure in which the inclined surfaces 50b for preventing the interlock protrusion 50 from being separated from the oriented steel plate material may be formed.

As in the example shown in Fig. 2, when a rectangular interlock protrusion 51 in which the long axis direction is parallel to the L direction (rolling direction) and the interlock protrusion 52 in which the major axis direction is parallel to the C direction is formed on the oriented steel sheet material, the long axis The rectangular interlock protrusion 50 in which the direction is parallel to the L direction (rolling direction) is manufactured by the embossing apparatus shown in FIG. 4, and interlayer bonding is made in the laminated structure shown in FIG. 6.

In addition, the interlock protrusion 52 in which the major axis direction (long direction) is parallel to the C direction is manufactured by the embossing apparatus shown in FIG. 7, and interlayer bonding is made in the laminated structure shown in FIG. 9.

In other words, in the case of the thin plate 1 for manufacturing a laminated core having a structure in which a plurality of rectangular interlock protrusions 51 and 52 crossing at right angles to each other in the major axis direction are formed at different positions, among the interlock protrusions 51 and 52 For the interlock protrusion 51 whose major axis direction is parallel to the rolling direction of the oriented steel sheet material, shear surfaces 50a perpendicular to the major axis direction are formed at both ends of the major axis direction, and the major axis direction is the rolling direction of the oriented steel sheet material. For the vertical interlock protrusion 52, shear surfaces 50a parallel to the major axis direction are formed at both ends in the minor axis direction.

That is, like the embossing punch 110 shown in FIG. 4, in the case of an embossing punch in which the longitudinal direction of the cross section of the punch tip 111 is installed parallel to the rolling direction of the oriented steel sheet material, Shearing portions 111a perpendicular to the major axis direction are formed at both ends, and inclined forming portions 111b are formed at both ends in the minor axis direction.

Figure 4 (a) is a cross-sectional view of the embossing punch (a cross-section perpendicular to the vertical axis of the embossing punch), Figure 4 (b) is a cross-sectional view of the embossing punch parallel to the longitudinal direction of the cross-section, Figure 4 (c) ) Is a cross-sectional view in a direction orthogonal to FIG. 4B. And Figure 6 (a) is a cross-sectional view of the interlock protrusion cut in the long axis direction, Figure 6 (b) is a cross-sectional view of the interlock protrusion cut in the short axis direction.

On the other hand, like the embossing punch 110 shown in FIG. 7, in the case of the embossing punch 110A in which the longitudinal direction of the cross section of the punch tip 111 is installed in a direction perpendicular to the rolling direction (C direction) of the oriented steel sheet material, In the cross section of the punch tip, shear processing portions 111a are formed at both ends in the minor axis direction, and inclined forming portions 111b perpendicular to the major axis direction are formed at both ends in the major axis direction (long direction of the punch tip cross section).

Figure 7 (a) is a cross-sectional view of the embossing punch (cross section perpendicular to the vertical axis of the embossing punch), Figure 7 (b) is a cross-sectional view (longitudinal cross-sectional view) in which the embossing punch is cut parallel to the long axis direction (long direction) of the cross section. ), and FIG. 7(c) is a cross-sectional view (vertical cross-sectional view) in a direction orthogonal to FIG. 6(b). And Figure 9 (a) is a cross-sectional view of the interlock protrusion cut in the long axis direction, Figure 9 (b) is a cross-sectional view of the interlock protrusion cut in the short axis direction.

The present invention may be implemented as an example of an embossing method for a grain-oriented steel sheet, in which an interlock protrusion for interlayer bonding of thin sheets forming a laminated core having a grain-oriented steel plate material is formed on the grain-oriented steel plate material for manufacturing a laminated core.

The embossing method includes a shear surface perpendicular to the rolling direction of the grain-oriented steel plate material by locally pressing one side of the grain-oriented steel plate material and perpendicular to the surface of the grain-oriented steel plate material, and the interlock protrusion is the grain-oriented steel plate material. And an embossing step of protruding from the other side surface of the grain-oriented steel plate material with the interlock protrusion having a shear surface 50a that prevents separation from.

For the above-described embossing, a grain-oriented steel plate material is supplied between the embossing punch and the embossing die, and interlock projections are formed on the grain-oriented steel plate material by the lifting of the embossing punch.

The embossing step includes forming a plurality of rectangular interlock protrusions crossing at right angles to each other in a direction of a major axis at different positions on the oriented steel plate material, wherein a major axis direction among the interlock protrusions is a rolling direction of the oriented steel plate material For the interlock protrusion 51 parallel to the longitudinal direction (long direction), shear surfaces perpendicular to the major axis direction are formed at both ends, and for the interlock protrusion 52 in which the major axis direction is perpendicular to the rolling direction of the oriented steel sheet material A shear surface parallel to the major axis direction (long direction) is formed at both ends of the minor axis direction (unidirectional direction).

The embossing method for a grain-oriented steel plate is a process technology for manufacturing a thin plate (lamina member) having interlock protrusions for interlocking by processing a grain-oriented steel plate, that is, performing an embossing process on a grain-oriented steel plate material, and a more specific example is It can be applied to the manufacturing process of the spark plug core.

In this specification, an example of forming a rectangular interlock protrusion has been described, but in the case of an embossing punch of a square cross section that forms a square interlock protrusion, a shearing part and an inclined part considering the rolling direction of the material are applied to the tip edge of the punch tip. I can.

For example, of the four edges of the punch tip having a quadrangular cross section, a shearing part 111a is formed at a pair of edges that are orthogonal to the rolling direction of the grain-oriented steel sheet material, and an inclined forming part 111b is formed at the remaining two edges. ) Can be formed.

As described above, preferred embodiments according to the present invention have been examined, and the fact that the present invention can be embodied in other specific forms without departing from its spirit or scope in addition to the above-described embodiments is known to those skilled in the art. It is self-evident to them.

Therefore, the above-described embodiments are to be regarded as illustrative rather than restrictive, and accordingly, the present invention is not limited to the above description and may be changed within the scope of the appended claims and equivalents thereof.

S: grain-oriented steel plate material 50: interlock projection
50a: shear surface 50b: inclined surface
110: embossing punch 111: punch tip
111a: shear processing portion 111b: inclined forming portion
120: embossing die 121: forming groove

Claims (5)

In the grain-oriented steel plate embossing apparatus for forming an interlock protrusion for interlayer bonding of thin plates forming a laminated core having a grain-oriented steel plate material on the grain-oriented steel plate material for manufacturing a laminated core:
An embossing punch for locally pressing one side of the grain-oriented steel plate material to protrude the interlock protrusion on the other side of the grain-oriented steel plate material; And
An embossing die having a forming groove facing the front end of the embossing punch, and supporting the other side of the grain-oriented steel plate material for forming the interlock protrusion:
The punch tip forming the front end of the embossing punch,
In order to form a shear plane perpendicular to the rolling direction of the grain-oriented steel plate material at the rim of the interlock protrusion and forming a shear plane perpendicular to the surface of the grain-oriented steel plate material, it is formed locally on the edge of the punch tip and in the rolling direction of the grain-oriented steel plate material. A shearing portion having an orthogonal shear edge,
An embossing apparatus for a grain-oriented steel sheet comprising an inclined forming part formed locally on an edge of the punch tip to form an inclined surface connecting the interlock protrusion and the directional material on the edge of the interlock protrusion. The method of claim 1,
The interlock punch and the forming groove form a pair;
The interlock punch is characterized in that a plurality of interlock protrusions having a pair of shear surfaces perpendicular to the rolling direction of the oriented steel sheet material and parallel to each other are formed on the oriented steel sheet material, wherein a plurality of interlocking punches are installed to be elevating and descending at different positions. Embossing device for grain-oriented steel sheet. As an embossing method for a grain-oriented steel sheet, in which an interlock protrusion for interlayer bonding of thin sheets forming a laminated core having a grain-oriented steel plate material is formed on the grain-oriented steel plate material for producing a laminated core:
By locally pressing one side of the grain-oriented steel plate material, a shear surface perpendicular to the rolling direction of the grain-oriented steel plate material and perpendicular to the surface of the grain-oriented steel plate material, and the interlock protrusion preventing separation from the grain-oriented steel plate material An embossing method for a grain-oriented steel sheet comprising an embossing step of protruding the interlock protrusion having an inclined surface on the other side of the grain-oriented steel sheet material. The method of claim 3,
The embossing process step;
Forming a plurality of rectangular interlock protrusions crossing each other at right angles in the major axis directions at different positions,
For interlock protrusions whose major axis direction is parallel to the rolling direction of the oriented steel sheet material among the interlock protrusions, shear surfaces perpendicular to the major axis direction are formed at both ends in the major axis direction,
An embossing method for a grain-oriented steel sheet in which, for interlock protrusions whose major axis direction is perpendicular to the rolling direction of the grain-oriented steel sheet material, shear surfaces parallel to the major axis direction are formed at both ends of the minor axis direction. A thin plate for manufacturing a laminated core made of a grain-oriented steel plate material to form a laminated core, and in which a plurality of interlock protrusions for interlayer bonding are formed;
The interlock protrusions are formed to protrude from one side of the thin plate to the other side;
The rim of the interlock protrusion,
Shear planes orthogonal to the rolling direction of the grain-oriented steel plate material and perpendicular to the surface of the grain-oriented steel plate material,
A thin plate for manufacturing a laminated core, characterized in that it has inclined surfaces that prevent the interlock protrusion from being separated from the grain-oriented steel plate material.

Images