KR20110122317A

KR20110122317A - Laminated core and, manufacturing methods for the same

Info

Publication number: KR20110122317A
Application number: KR1020100041740A
Authority: KR
Inventors: 주진
Original assignee: 주진
Priority date: 2010-05-04
Filing date: 2010-05-04
Publication date: 2011-11-10
Also published as: KR101130177B1

Abstract

According to the present invention, in order to manufacture a laminated core in which the slot channels are vertical, an indexing method for laminating the laminated barrel by a predetermined angle when laminating the lamina member is performed. prime number) and the number of interlock taps is smaller than the number of slots, or the number of slots formed in the lamina member and the number of interlock taps do not have a common divisor.

Description

Laminated core and manufacturing method for the same

The present invention relates to a laminated core and a method of manufacturing the same, and more particularly, in order to manufacture a laminated core in which the slot channel is vertical, indexing for laminating the laminated barrel by a predetermined angle during lamination of the lamina member. If the number of slots in the lamina member is prime and the number of interlock tabs is smaller than the number of slots, or the number of slots formed in the lamina member and the number of interlock tabs do not have a common divisor. The present invention relates to a laminated core applicable to the case and a method of manufacturing the same.

In general, laminated cores produced by laminating lamina members are used as rotors and stators of generators or motors, and methods for making them are well known in the art.

1 shows a laminated core 20 completed by laminating a lamina member 10. The shaft hole 11 is formed in the center of the circular lamina member 10. A plurality of slots 12 are radially formed on the outer circumferential side of the lamina member 10 on the outer side of the shaft hole 11.

A plurality of interlock tabs 14 are formed on the outer side of the shaft hole 11. As shown in FIG. 2, the interlock tab 14 is a recess embossed down, where the interlock tab 14 of the upper lamina member 10 is directly below the lamina when the lamina member 10 is laminated. The interlock tabs 14 formed on the member 10 are fitted to each other so that the stacked cores 20 are formed.

The laminated core 20 is manufactured by the laminated core manufacturing apparatus. The manufacturing of the laminated core 20 is disclosed in Korean Patent Registration No. 10-0578043, Korean Patent Registration No. 10-0762744, and the like. Hereinafter, one of the manufacturing methods will be described with reference to FIGS. 3 and 4. This will be described.

The laminated core manufacturing apparatus 100 includes a slot forming portion 30, a counterhole forming portion 40, a shaft hole forming portion 50, an interlock tab forming portion 60, and a blanking portion 70.

That is, the pin body 30a, 40a, 50a, 60a and the blank block having various shapes and functions for stamping or blanking the metal strip 1 are formed in the press body 80 of the laminated core manufacturing apparatus 100. 70a is mounted, and punch holes 30b, 40b, 50b, 60b corresponding to the pin punches 30a, 40a, 50a, 60a are formed in the die body 82, The stacking barrel 70b corresponding to the blank block 70a is provided. The lamina member 10 is manufactured by supplying the elongate shape metal strip 1 to the lamination core manufacturing apparatus 100.

In the first step (I), the slot forming portion 30 forms a plurality of slots 12 by drilling the metal strip 1 which is conveyed by a predetermined conveying means (not shown). Subsequently, the metal strip 1 is brought into the standby state in the second step (II). Next, the metal strip 1 is moved to the third step (III) to undergo a counter process. The counter process is a process for forming the counter hole 19 at the point where the interlock tab 14 is to be formed in order to stack the stacked cores 20 in a predetermined number of times and then separate them. This counter process is not performed for all the lamina members 10, but for example, once every 20 times, depending on the thickness of the laminated core 20 is determined. When the counter process is performed, the position at which the interlock tab 14 of the metal strip 1 is formed is punched by the punch pin 40a, and when the process is not performed, it is simply excessive as an idle process.

Next, in the fourth step (IV), the shaft hole 11 in the center portion is drilled. Subsequently, the metal strip 1, which is advanced one pitch further, is pressed down by a plurality of points around the shaft hole 11 by the embossing pin 60a in the embossing process of the fifth step (V), thereby causing the interlock tab 14 Is formed. The interlock tab 14 has a concave top surface and a convex bottom surface. The sixth step VI is an idle process, in which the metal strip 1 is in the standby state for the seventh step without any treatment.

The seventh step (v) is a process of blanking the metal strip 1 to produce the lamina member 10, and laminating the lamina member 10 to complete the lamination core 20. In this step, the outline of the lamina member 10 is cut by the blank block 70a and separated from the metal strip 1.

The separated lamina member 10 is pushed into the lamination barrel 70b by the blank block 70a and laminated on the upper surface of the lamina member 10 which is already laminated. At this time, the lower surface convex portion of the interlock tab 14 of the upper lamina member 10 is inserted into the upper surface concave portion of the interlock tab 14 of the lower lamina member 10, so that the lamina member 10 ) May be stacked on each other. After a predetermined number of sheets, for example, 20 lamina members 10 are laminated by the same process, the lamina member 10 in which the counter hole 19 is formed in place of the interlock tab 14 is blanked in the counter process. When laminated, the lamina member 10 does not have an interlock tab 14 so that the lamina member 10 is no longer laminated and is separated. The laminated core 20 thus manufactured is discharged to the outside through a separate outlet.

On the other hand, due to the deviation of the thickness of the lamina member 10 when the lamina member 10 is laminated in order to prevent the laminated core 20 on which the lamina member 10 is stacked to be inclined to either side without being vertical In this case, the lamination barrel 70b is rotated by a predetermined angle at every lamination interval. Such a method is referred to as 'indexing', and 'indexing' is disclosed in Korean Patent Registration No. 10-0578043.

In the indexing process, the stacked barrel 70b is rotated by a predetermined angle, which is an angle formed by the neighboring interlock tabs 14 with the center of the lamina member 10 or an integer multiple of the angle. The predetermined angle must be an angle at which neighboring slots 12 form the center of lamina member 10 or an integer multiple of the angle. Of course, the rotation angle of the stacked barrel 70b should be smaller than 360 degrees.

If the stacked barrel 70b is rotated at an angle at which the condition is not satisfied, the slots 12 do not form a straight line or the interlock tabs 14 do not fit together.

Referring to FIG. 1 as an example, when the neighboring slots 12 form 45 degrees and the neighboring interlock tabs 14 form 45 degrees, the rotation angle of the stacked barrel 70b is 45 degrees or an integer multiple of 45 degrees. Should be 90 degrees or 180 degrees.

If the number of slots 12 is 10 so that the neighboring slots 12 are 36 degrees and the interlock tabs 14 are 5, the neighboring interlock tabs 14 are 72 degrees. ), The rotation angle should be any one of 72 degrees, 144 degrees, 216 degrees, and 288 degrees, and the laminated barrel 70b should not be rotated at an angle of 36 degrees.

On the other hand, the number of slots 12 is determined according to the properties required for the generator or motor. For example, when the number of slots 12 is 23, the rotatable angle of the stacked barrel 70b is 15.7 degrees (360 degrees). / 23) or an integer multiple of 15.7 degrees, such as 31.3 degrees, 46.9 degrees, 62.6 degrees, 78.3 degrees, and so on. However, the number of the interlock tabs 14 that can be rotated is only an integer multiple of 23 or 23. If the number of the interlock tabs 14 is so large, stress is concentrated on the interlock tabs 14. There is a problem that the risk of breakage is great due to the low strength of 10).

The problem is that the number of slots 12 is prime and the number of interlock tabs 14 is smaller than the number of slots 12, or the number of slots 12 and the interlock tabs 14 Occurs when the number of does not have a common divisor.

On the other hand, in order to eliminate the problem, the angle between the neighboring slot 12 and the center of the lamina member 10 and the angle between the neighboring interlock tab 14 and the center of the lamina member 10 are different from each other. In addition, the lamina member 10 may be stacked so that the slot channel 13 is inclined instead of vertical, but the slot channel 13 is vertical (FIG. 1) and the inclined case is different from that of the generator or motor. There is a problem.

The present invention has been devised to solve the above problems, in order to manufacture a stacked core in which the slot channel is vertical, the indexing method for rotating the laminated barrel by a predetermined angle at a predetermined interval is a small number of slots of the lamina member (素Prime, prime number) and a laminated core that can be applied when the number of interlock tabs is smaller than the number of slots or when the number of slots formed in the lamina member and the number of interlock tabs do not have a common factor, and a manufacturing method thereof. The purpose is to provide.

In order to achieve the above object, in the laminated core according to the preferred embodiment of the present invention, a convex portion of the lower surface of the interlock tab of the upper lamina member is forcibly fitted to an upper surface concave portion of the interlock tab of the lower lamina member, thereby providing a plurality of lamina members. The top surface convex portion is inserted into the through hole, and the line connecting the interlock tab of the laminated lamina member is inclined with the vertical line, and the line connecting the slot forms a vertical line.

Preferably, the number of slots formed in each lamina member and the number of interlock tabs do not have a common factor.

More preferably, the number of slots formed in each lamina member is a minority, and the number of interlock tabs is smaller than the number of slots.

According to another aspect of the present invention, a method of manufacturing a laminated core includes: (a) forming a plurality of slots and a plurality of interlock tabs in a metal strip, and forming a through hole penetrating a metal strip at one end of the interlock tab to form a lamina member. Preparing a; And (b) stacking the lamina member manufactured in the step (a), but allowing the convex portion of the lower surface of the interlock tab of the upper lamina member to be tightly coupled to the upper concave portion of the interlock tab of the lower lamina member. At this time, the laminated body of the lamina members already laminated at a predetermined angle at predetermined intervals is rotated so that the lower surface convex portion is inserted into a part of the upper concave portion and the through hole, and the upper and lower lamina member slots of the laminated body. And a line connecting the interconnections to each other to form a vertical line and the lines connecting the interlock tabs of the upper and lower lamina members of the laminate to be inclined.

Preferably, the number of slots formed in each lamina member is a minority, and the number of interlock tabs is smaller than the number of slots.

Here, the laminate is preferably rotated by an integer multiple of the angle that the adjacent slots and the center of the lamina member.

Laminated core according to the present invention, and a method of manufacturing the same, in order to produce a laminated core in which the slot channel is vertical, an indexing method for laminating the laminated barrel by a predetermined angle when laminating the lamina member in the slot of the lamina member It can also be applied when the number of primes is prime and the number of interlock tabs is smaller than the number of slots, or when the number of slots formed in the lamina member and the number of interlock tabs do not have a common divisor.

1 is a perspective view showing a laminated core according to the prior art.
FIG. 2 is a cross-sectional view taken along the line II-II 'of FIG. 1.
3 is a side view schematically showing the configuration of a laminated core manufacturing apparatus according to the prior art.
FIG. 4 is a plan view illustrating a process of manufacturing a lamina member by the laminated core manufacturing apparatus of FIG. 3 on a metal strip. FIG.
5 is a perspective view showing a laminated core according to a preferred embodiment of the present invention.
FIG. 6 is a plan view illustrating a lamina member provided in the stacked core of FIG. 5.
FIG. 7 is an enlarged view of a portion A of FIG. 6.
8 is a partial cross-sectional view showing that the lamina member is laminated in the lamination core of FIG.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely examples of the present invention and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.

5 is a perspective view showing a laminated core according to a preferred embodiment of the present invention, Figure 6 is a plan view showing a lamina member provided in the laminated core, Figure 7 is an enlarged view of a portion A of FIG.

Laminated core 200 according to the present invention is made of a lamina member 110 is laminated. The lamina member 110 has a shaft hole 111 formed in the center, a plurality of slots 112 formed radially on the outer circumferential side of the lamina member 110, and the shaft hole 111. A plurality of interlock tabs 114 disposed at an angle and through holes 115 formed to penetrate the lamina member 110 at one end of the interlock tab 114 are provided.

The number of slots 112 and the number of interlock tabs 114 do not have a common factor, and more preferably, the number of slots 112 is prime and the number of interlock tabs 114 is a slot. Is less than the number of. As shown in the figure, there are 23 slots 112 and 6 interlock tabs 114. In the following description, a case in which 23 slots 112 and 6 interlock tabs 114 are described will be described as an example. However, the inventive concept is not limited to 23 slots 112 and 6 interlock tabs 114. The number of slots 112 and the number of interlock tabs 114 can be applied when the above conditions are satisfied.

Since the slots 112 are 23, the angle between the adjacent slots 112 and the center of the lamina member 110 is about 15.7 degrees, and the interlock tabs 114 are adjacent because the interlock tabs 114 are six. The angle formed with the center of the lamina member 110 is 60 degrees.

On the other hand, when the lamina member 110 is laminated, the upper and lower lamina members 110 are interlocked with the interlock tabs 114. That is, as shown in Figure 8, the lower convex portion of the interlock tab 114 of the upper lamina member 110 is forcibly fitted to the upper concave portion of the lower lamina member 110, the lower convex portion is It is inserted into the portion and the through hole 115. This point is described below.

As described above, in order to compensate for the thickness variation of the lamina member 110, the lamination barrel 70b is rotated by a predetermined angle at predetermined intervals when the lamina member 110 is laminated. When the stacking barrel 70b is rotated, the stack of lamina members 110 accommodated in the stacking barrel 70b also rotates.

Rotation angle of the stacking barrel 70b is a line (that is, the slot channel 113) connecting the slots 112 of the lamina member 110 to be laminated to each other perpendicular to each other and the interlock tab 114 is pressed together The angle should be as high as possible. In the drawing, since the angle formed by the slots 112 is about 15.7 degrees and the angle formed by the interlock tab 114 is 60 degrees, when the stacked barrel 70b is rotated, for example, about 62.8 degrees (15.7 degrees × 4), The slots 112 of the lower lamina member 110 correspond to each other, and the lower convex surface of the interlock tab 114 of the upper lamina member 110 is concave on the upper surface of the lower lamina member 110. It is inserted into a part of the part and the through hole 115. Since the angle of rotation of the stacked barrel 70b (for example, about 62.8 degrees) is larger than the angle formed by the interlock tab 114 (for example, 60 degrees), the lower convex surface is not inserted only in the upper concave portion, It is inserted into a part of the recess and the through hole 115.

In the laminated lamina member 110 by repeating the above process, the slot channel 113 is vertical, and a line connecting the interlock tabs 114 of the upper and lower lamina members 110 is inclined.

Then, the manufacturing method of the laminated core according to the present invention will be described. The manufacturing method according to the present invention includes a slot forming step (I in FIG. 3), a counter hole forming step (III), a shaft hole forming step (IV), an interlock tab forming step (V), and a blanking step (VII). In the following, only the characteristic parts of the present invention will be described without omitting the parts described in the background art for each of the above steps.

First, in the slot forming step, the slot 112 is formed by using the pin punch 30a. The number of slots 112 does not have a common factor and the number of interlock tabs 114. Preferably, the number of slots 112 is a small number and the number of interlock tabs 114 is smaller than the number of slots 112. .

The metal strip 1 in which the slot 112 is formed is moved to the counterhole forming portion 40. This counter process is a process for forming the counter hole at the point where the interlock tab 114 is to be formed in order to stack the stacked cores 200 in a predetermined number of times and then separate them. This counter process is not performed for all the lamina members 110, but is performed, for example, once every 20 times, depending on the thickness of the laminated core 200. When the counter process is performed, the position at which the interlock tab 114 of the metal strip 1 is formed is punched by the punch pin 40a, and when the process is not performed, it is simply excessive as an idle process.

Subsequently, the metal strip 1 is moved to the shaft hole forming portion 50. Shaft hole forming unit 50 forms a shaft hole 111, this process is the same as described in the 'background surgery' column.

The metal strip 1 in which the shaft hole 111 is formed moves to the interlock tab formation.

The interlock tab forming portion forms the through hole 115 and the interlock tab 114. One end of the interlock tab 114 is connected to the through hole 115. That is, the through hole 115 is formed at one end of the interlock tab 114. The interlock tab forming part has a pin punch that can penetrate the metal strip 1 and is provided in the upper press 80, and a pin punch that can form the interlock tab 114 and is fired in the upper press 80. When the upper press 80 reciprocates with respect to the lower die 82, the pin punches form through holes 115 and interlock tabs 114 in the metal strip 1, respectively. As described above, the through hole 115 is a hole penetrating through the metal strip 1, and the interlock tab 114 is formed by pressing the metal strip 1 on the upper surface of the metal strip 1 by the pressing. Concave portions are formed, and convex portions are formed on the lower surface.

The metal strip 1 having the interlock tab 114 and the through hole 115 is moved to the blanking part 70. The blanking part 70 blanks the lamina member 110 from the metal strip 1 using the blanking punch 70a, and then laminates of the lamina member 110 already laminated in the lamination barrel 70b. To At this time, the laminated barrel 70b is rotated at a predetermined angle every time, for example, when the lamina member 110 is stacked, and the laminated barrel 70b has 23 slots 112 and six interlock tabs 114. The stacked barrel 70b may be rotated by about 62.8 degrees. When the stacked barrel 70b is rotated about 62.8 degrees, the 62.8 degrees is larger than the 60 degrees formed by the interlock tab 114. Therefore, the lower convex surface is inserted into a part of the upper concave portion and the through hole 115 so that the upper lamina member 110 is rotated. ) And the lower lamina member 110 is forcibly fitted.

On the other hand, since the lamina member in which the counter hole was formed does not have the interlock tab 114 (lower convex surface), the lamina member is separated from the laminate of the lower part without interference fit bonding.

10, 110: lamina member 20, 200: laminated core
30: slot forming portion 40: counter hole forming portion
50: shaft hole forming portion 60: interlock tab forming portion
70: blanking part

Claims

In a laminated core in which a plurality of lamina members are laminated,
In the lamina member,
A plurality of slots are formed on the outer circumferential side, a plurality of interlock tabs are formed at a predetermined angle with respect to the center of the lamina member, a through hole penetrating the lamina member is formed at one end of the interlock tab,
The lower convex portion of the interlock tab of the upper lamina member is forcibly coupled to the upper concave portion of the interlock tab of the lower lamina member so that a plurality of lamina members are stacked. The lower convex portion is inserted into a part of the upper concave portion and the through hole. And a line connecting the interlock tabs of the laminated lamina members is inclined with a vertical line, and a line connecting the slots forms a vertical line.

The method of claim 1,
Laminated core, characterized in that the number of slots and the number of interlock tabs formed in each lamina member does not have a common divisor.

The method according to claim 1 or 2,
And the number of slots formed in each lamina member is small and the number of interlock tabs is smaller than the number of slots.

(a) forming a plurality of slots and a plurality of interlock tabs in the metal strip, and forming a through hole through the metal strip at one end of the interlock tab to produce a lamina member; And
(b) laminating the lamina member manufactured in the step (a), wherein the lower convex portion of the interlock tab of the upper lamina member is forcibly fitted to the upper concave portion of the interlock tab of the lower lamina member. Rotating a laminate of lamina members already laminated at a predetermined angle at predetermined intervals so that the lower surface convex portion is inserted into a part of the upper concave portion and the through hole, and slots of the upper and lower lamina members of the laminate are mutually The connecting lines are perpendicular to each other and the line connecting the interlock tabs of the upper and lower lamina members of the laminate to each other is inclined.

The method of claim 4, wherein
The number of slots and the number of interlock tabs formed in each lamina member does not have a common divisor.

The method of claim 4, wherein
The number of slots formed in each lamina member is a small number, the number of interlock tabs is smaller than the number of slots manufacturing method of the laminated core.

The method according to any one of claims 4 to 6,
The laminate is laminated core manufacturing method, characterized in that the adjacent slot is rotated by an integer multiple of the angle formed with the center of the lamina member.