JPH08250320A - Laminated magnetic core and manufacture thereof - Google Patents

Abstract

PURPOSE: To provide a laminated magnetic core and a manufacturing method thereof such that conductors wound on silent poles are prevented from being damaged. CONSTITUTION: A laminated magnetic core has core component pieces 1A and 1J at both ends, with punching burrs v at their silent-pole components 1Aa and 1Ja mutually opposed. The core is made such that the punching direction of the silent-pole component 1Aa at the piece 1A provided at one end and that of the component 1Ja at the piece 1J are made different from each other in such a way that the punching burrs v are opposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated iron core which is formed by laminating a plurality of iron core component pieces, each of which is formed by punching a salient pole component portion by press working, to a predetermined laminated thickness and integrally forming them. , And a method for manufacturing a laminated core.

[0002]

2. Description of the Related Art A stator (laminated iron core) A of a rotating electric machine shown in FIG. 8 is manufactured by laminating a predetermined number of iron core constituent pieces and fixing them to each other, and has a central opening B and a plurality of protrusions. It has a polar element C, C ...

On the other hand, FIG. 10 shows a progressive die apparatus M for manufacturing the stator A. This progressive die apparatus M comprises processing stations I to III, idle stations IV, and blanking stations V. There is.

As shown in FIG. 11, the strip-shaped steel plate W fed into the progressive die apparatus M is punched (punched) with salient pole-constituting parts c, c, c ... , The central opening forming portion b is punched out, then the caulking projections d, d ... Are formed in the processing station III, and then the punch Pb and the blanking die D are formed in the blanking station V.
(See FIG. 10), the outer shape of the iron core component Aa is removed.

In the blanking station V, the iron core component piece Aa is pulled out to the blanking die D, and inside the blanking die D, the preceding iron core component piece Aa is connected to each other by the caulking projections d, d. It

After a predetermined number of iron core component pieces Aa, Aa ... Are laminated to form the stator A, a processing station II is formed.
By the punches Pd, Pd ... (See FIG. 10) selectively operated by I, the portions corresponding to the caulking projections of the succeeding iron core component Aa are pulled out, so that each stator A in the blanking die D is removed. Separation takes place.

The completed stator A is pulled out downward from the blanking die D by the descending of the pedestal F, and then sent out of the progressive die apparatus M by the operation of the pusher G.

[0008]

By the way, the salient pole forming parts c, c ... Of the iron core forming piece Aa forming the stator A are the punches Pc, Pc provided in the upper die of the processing station I.
... (see FIG. 10), punching is performed from the upper side to the lower side. Therefore, as shown in FIG. 9, the edges of the salient poles C, C ...
Will be projected.

A conductor wire is wound around the salient poles C, C ... In the stator A in a later step. However, in a small rotating electric machine such as a micromotor, an extremely thin conductor wire is used. When the punching burr v is projected on the edge portion of the salient pole C as described above, the punching burr v may cause damage or breakage of the conductor wire.

As a means for solving such inconvenience,
There is provided a method of removing a punching burr by providing a deburring jig having protrusions following the outer shape of the salient poles C, C ... and pressing the deburring jig against the end of the stator A. However, when such a method is adopted, the number of working steps is inevitably increased, and furthermore, there is a disadvantage that the working environment is deteriorated because the pressed punching burrs are lost to form fine metal powder.

In view of the above situation, it is an object of the present invention to provide a laminated core and a method for manufacturing the laminated core which can prevent damage to the conductor wound around the salient pole, and also to prevent damage to the conductor. It is an object of the present invention to provide a method for manufacturing a laminated core that can manufacture a preventable laminated core without significantly increasing the number of steps.

[0012]

Therefore, in the laminated core according to the present invention, the core forming piece located at one end and the core forming piece located at the other end are punched burrs in each salient pole forming part. Are laminated in such a manner that they are opposed to each other. Further, in the method for manufacturing a laminated core according to the present invention, the punching direction of the salient pole component of the core component laminated on one end of the laminated core, and the salient pole of the core component laminated on the other end of the laminated core. The punching direction of the component is made different from each other in such a manner that the punching burrs of the salient pole component of each iron core component face each other. Further, in the method for manufacturing a laminated core according to the present invention, when the salient pole component is formed on the iron core component located at the bottom of the laminated core, punching is performed from below to above, while When forming a salient pole constituent part in another core constituent piece laminated one by one on the iron core constituent piece located at the bottom, punching is performed from the upper side to the lower side.

[0013]

According to the laminated iron core and the method of manufacturing the laminated iron core having the above structure, the punching burr is not exposed at the edge of the salient pole piece. Further, according to the method for manufacturing a laminated core having the above structure,
It is possible to manufacture a laminated iron core in which punching burrs are not exposed at the edges of salient poles without using a conventional deburring jig.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing an embodiment. 1 to 3 show a stator 1 of a rotary electric machine constituted by a laminated iron core according to the present invention, and this stator 1 is made of a strip-shaped steel plate as in a conventional stator A (see FIG. 8). A plurality of iron core component pieces 1A to 1J that are punched into a shape are stacked to form these iron core component pieces 1A.
It is manufactured by fixing ~ 1J to each other and integrating them.

Further, the stator 1 has a central opening 2 and a plurality of salient poles 3, 3 formed so as to surround the central opening 2, and its appearance is basically conventional. There is no difference from the stator A of the above, and a plurality of salient poles 3,
An extremely thin conductive wire is wound around 3 ... In a later step, and a rotor (not shown) is inserted into the central opening 2 when the rotary electric machine is assembled.

Further, as is apparent from FIGS. 2 and 3, the stator 1 is located at the upper end (one end) of the stator 1 and the core component piece 1J and at the lower end (the other end). The iron core component 1A and the iron core component 1A are laminated in such a manner that the punching burrs v generated on the outer edges of the salient pole component portions 1Ja and 1Aa face each other.

In other words, the stator 1 has an upper end (one end).
Punching burr v generated in the salient pole forming portion 1Ja of the iron core constituting piece 1J stacked on the lower end and the punching burr v forming in the salient pole forming portion 1Aa of the iron core forming piece 1A laminated on the lower end (the other end).
So as to face each other, the punching direction of the salient pole component 1Ja in the upper core component 1J and the lower core component 1Ja.
It is manufactured by making the salient pole component 1Aa in A different from the punching direction.

As a result, as shown in FIGS. 2 and 3 (b), punching burrs are completely projected at the four corners of the salient pole 3 of the stator 1, that is, the edges 3a, 3a ... In addition, the edges 3a, 3a of the salient pole 3 are ...
Is rounded due to sagging during punching,
The winding wound around the salient pole piece 3 is not damaged by the punching burr.

In the following, referring to FIGS. 4 to 7,
A specific method of manufacturing the stator (laminated iron core) 1 will be described. FIG. 4 shows a progressive die apparatus 100 for manufacturing the stator 1, and shows a processing station S for punching and forming the salient pole forming portion 1Aa of the iron core forming piece 1A located at the bottom of the stator 1. ing.

The entire structure of the progressive die apparatus 100 is the same as that of the progressive die apparatus M for manufacturing the conventional stator 1 (see FIG. 10).
Basically, there is no difference between the above-mentioned processing station S and the conventional progressive die apparatus M. Needless to say, the processing station S is installed at an arbitrary position on the upstream side of the blanking station (see FIG. 10).

The processing station S in this progressive die apparatus 100 is provided with an upper die 110 and a lower die 120. The upper die 110 includes a die 12 and a stripper 13 attached to the punch holder 10 via a die block 11, and the die block 11 has a die 12.
, Which are communicated with the opening of the punch holder 10, are provided in the punch holder 10.
An air blow passage 10a communicating with a, 11a, ... Is formed.

One end of the air blow passage 10a (right end in the figure)
While a nozzle block 14 connected to an air supply source (not shown) is attached to the above, a pipe 15 extending to the outside of the mold apparatus is joined to the other end (the left end in the figure) of the air blow passage 10a. It is attached through 16.

On the other hand, as shown in FIGS. 4 and 5, the lower mold 1
20 is a guide plate 21 fixed to the die shoe 20.
The guide plate 21 has a punch plate 22 and a stripper plate 23 which are vertically movable.

The punch plate 22 holds slot punches 24, 24 ... For punching and forming the salient pole-constituting portion 1Aa of the core-constituting piece 1A located at the bottom of the stator 1, and is fixed to the die shoe 20. It is possible to move vertically by being guided by the guide bolt 25 and the guide plate 21 provided.

The stripper plate 23 has slot punches 24, 24 ...
And a pair of guide plates 26, 26 for guiding a strip-shaped steel plate (not shown) in a direction orthogonal to the paper surface is attached, and the stripper plate 23 is guided by the guide plate 21. It can move up and down.

Further, the stripper plate 23 has
A stripper bolt 27 extending through the punch plate 22 is fixedly provided, and a stripper spring 28 is interposed between the punch plate 22 and the stripper plate 23.
The punch plate 22 and the stripper plate 2 in the normal state by the cooperative action of the stripper spring 28 and the stripper spring 28.
3 is occupied at a relative position where the slot punches 24, 24 ... Do not project from the upper surface of the stripper plate 23.

A lift block 30, a lift cam 40, and a slide cam 50 are arranged below the punch plate 22. In the lift cam 40, the guide posts 41, 41 provided at the ends of the lift cam 40 are attached to the die shoe 20.
Is guided by a guide bush 42, 42 provided in the above through a bearing (not shown) to be vertically movable with respect to the die shoe 20.
A plurality of cam convex portions 40a and cam concave portions 40b are provided on the lower surface thereof.
And are formed.

The lift block 30 is disposed between the punch plate 22 and the lift cam 30 and is housed so as to be vertically movable with respect to the die shoe 20, and the lower surface of the punch plate 22 and the upper surface of the lift cam 30. The vertical movement of the lift cam 40 is transmitted to the punch plate 22 via the lift block 30.

On the other hand, the slide cam 50 is the lift cam 3
The air cylinder 5 installed horizontally on the die shoe 20 in the lower region of 0.
1 is connected via a joint 52, and a plurality of cam projections 50a and cam recesses 50b are formed on the upper surface thereof.

As shown in FIGS. 4 and 5, the lift cam 40 is attached to the cam projections 50a, 50a ... Of the slide cam 50.
In the state where the cam convex portions 40a, 40a, ... Are riding up, the lift plate 40 is pushed up by the slide cam 50, and the punch plate 22 and the stripper plate 23 are raised.

When the slide cam 50 horizontally moves to the left in the drawing by the operation of the air cylinder 51 and the cam concave portions 50b, 50b ... Of the slide cam 50 match the cam convex portions 40a, 40a. The plate 22 and the stripper plate 23 descend by their own weight.

That is, the punch plate 22 and the stripper plate 23 move up and down based on the cam action of the slide cam 50 and the lift cam 40 as the slide cam 50 moves due to the operation of the air cylinder 51.

In the progressive die apparatus 100 having the above structure, when the salient pole forming portion 1Aa is formed on the iron core forming piece 1A located at the lower end of the stator 1, the air cylinder 51 in the processing station S operates based on the cut signal. Then, as shown in FIG. 6, when the slide cam 50 moves to a position where the cam convex portion 40a of the lift cam 40 rides on the cam convex portion 50a, the punch plate 22 and the stripper plate 23 at the processing station S are moved to the raised position. Will be ranked.

In this state, the die 12 (upper die 11
0) descends from the lowermost position (bottom dead center) shown in FIG. 6A to FIG. 6B, the stripper plate 23 moves the die 1
With the strip-shaped steel plate W sandwiched between the stripper and the strip 2, the stripper spring 28 is pushed down against the biasing force of the stripper spring 28.

On the other hand, the slot punch 24 provided on the punch plate 22 is immovably supported via the lift block 30, the lift cam 40, and the slide cam 50, so that the slot punch 24 is relatively positioned above the descending stripper plate 23. The strip steel plate W on the stripper plate 23 is punched by the slot punch 24.

That is, the salient pole forming portion 1Aa of the iron core forming piece 1A is punched from the lower side to the upper side by the slot punch 24 provided in the lower die 120, as shown in FIG. 3 (a). As described above, the salient pole forming portion 1Aa of the iron core forming piece 1A has a punching burr v formed upward.

The scrap w extracted into the die 12 is the die block 1 shown in FIG.
The scrap generated by the subsequent operation of the processing station S through the waste passage 11a of No. 1 is sequentially pushed out to the air blow passage 10a of the punch holder 10 and the air jetted from the nozzle block 14 causes the joint 16 and the pipe 15 to flow. It is discharged to the outside of the mold device via the.

After the salient pole forming portion 1Aa of the iron core forming piece 1A is formed by the slot punch 24, the stripper plate 23 is moved upward by the returning force of the stripper spring 28 as the die 12 (upper die 110) is lifted. Then, the strip steel plate W is peeled off from the slot punch 24.

At the processing station S, after the salient pole forming portion 1Aa of the iron core forming piece 1A is formed as described above, the iron core forming piece 1A is punched out at the blanking station and is dropped into the blanking die. It should be noted that the punching formation of the central opening forming portion of the iron core forming piece 1A and the punching-out of the caulking projection corresponding portion are performed as shown in FIG.
Needless to say, it is carried out at each processing station of the same mode as the conventional progressive die apparatus M shown in FIG.

On the other hand, in the progressive die apparatus 100 having the above-described structure, when the salient pole component portions 1Ba to 1Ja are formed on the iron core component pieces 1B to 1J which are sequentially stacked on the iron core component piece 1A, respectively. The punching is not performed in the machining station S, which is performed in the machining station corresponding to the machining station I of the progressive die apparatus M shown in FIG.

That is, when the salient pole component portions 1Ba to 1Ja are formed on the iron core component pieces 1B to 1J, the slide cam 50 in the processing station S has the cam convex portion 40a of the lift cam 40 in the cam concave portion 50b as shown in FIG. Has moved to a position where the punch plate 2
2 and the stripper plate 23 are occupied in the lowered position.

In this state, the die 12 (upper die 11
0) descends from the lowermost position (bottom dead center) shown in FIG. 7A to FIG. 7B, the stripper plate 23 is not pushed down by the die 12 through the strip steel plate W, and The strip steel plate W on the stripper plate 23 is not punched by the slot punch 24.

As described above, the iron core component pieces 1B to 1J include
Processing station I of the progressive die apparatus M shown in FIG.
In the machining station corresponding to the above, each salient pole forming portion 1Ba to 1Ja is punched and formed from the upper side to the lower side by the punch provided in the upper die, so that FIG.
As shown in (a), punching burrs v are formed downward in the salient pole forming portions 1Ba to 1Ja of the iron core forming pieces 1B to 1J.

After the respective salient pole constituent portions 1Ba to 1Ja are formed in the iron core constituent pieces 1B to 1J, the central opening is performed in each processing station of the same mode as the conventional progressive die apparatus M shown in FIG. With the component and the caulking projection formed, the outer shape is punched out at the blanking station and is dropped into the blanking die, and inside the blanking die, the preceding iron core component 1A and the caulking projection are joined together. As a result, the stator 1 having a predetermined laminated thickness is formed.

As described above, the iron core component 1A
In the salient pole forming portion 1Aa in FIG. 1, a punching burr v is formed upward, while in the salient pole forming portions 1Ba to 1Ja of the iron core forming pieces 1B to 1J, a punching burr v is formed downward. Therefore, in the stator 1 formed by stacking the iron core constituent pieces 1B to 1J on the upper part of the iron core constituent piece 1A, as shown in FIGS. 2 and 3B, the four corners of the salient pole piece 3, that is, the upper, lower, left, and right in the figure. Edges 3a, 3a
The punching burr does not protrude to the ...
There is no fear that the winding wound around the wire will be damaged by punching burrs.

Although the present invention is applied to the stator of the rotary electric machine in the above-mentioned embodiments, the laminated core and the method for manufacturing the laminated core according to the present invention are applied to the rotor of the rotary electric machine. Needless to say, is also very effectively applied.

[0047]

As described above in detail, in the laminated core according to the present invention, the iron core constituent piece located at one end and the iron core constituent piece located at the other end are punched in each salient pole constituent part. The burrs are stacked in such a manner that the burrs face each other.
Further, in the method for manufacturing a laminated core according to the present invention, the punching direction of the salient pole component of the core component laminated on one end of the laminated core, and the salient pole of the core component laminated on the other end of the laminated core. The punching direction of the component is made different from each other in such a manner that the punching burrs of the salient pole component of each iron core component face each other. Therefore, according to the laminated iron core and the method for manufacturing the laminated iron core according to the present invention, the punching burr is not exposed at the edge portion of the salient pole in the laminated iron core, and thus the conductor wire wound around the salient pole of the laminated iron core is formed. Damage can be prevented in advance. Further, in the method for manufacturing a laminated core according to the present invention, when the salient pole component is formed on the iron core component located at the bottom of the laminated core, punching is performed from below to above, while When forming a salient pole constituent part in another core constituent piece laminated one by one on the iron core constituent piece located at the bottom, punching is performed from the upper side to the lower side. Therefore, according to the method for manufacturing a laminated core according to the present invention, the punching direction when forming the salient pole-constituting portion on the core-constituting piece is set to the maximum of the laminated-iron core without using a dedicated jig for deburring. Since the only difference is the iron core component located below and the other core component, the laminated core that can prevent damage to the conductor wire without exposing the punching burr on the edge of the salient pole, It is possible to manufacture without causing a large increase in

[Brief description of drawings]

1A and 1B are an overall perspective view and an overall plan view showing a laminated iron core according to the present invention.

FIG. 2 is a II of FIG. 1 (b) showing a salient pole in a laminated core.
-II line sectional view.

3 (a) and 3 (b) are cross-sectional end views of a salient pole piece showing a stacking mode of iron core component pieces.

FIG. 4 is a sectional side view showing a part of the progressive die device.

FIG. 5 is a cross-sectional side view showing an enlarged main part of the progressive die device.

6 (a) and 6 (b) are conceptual diagrams showing an operation mode of a progressive die device.

7A and 7B are conceptual diagrams showing an operation mode of the progressive die device.

8A and 8B are an overall perspective view and a plan view showing a conventional laminated iron core.

FIG. 9 is a view showing a salient pole piece in a conventional laminated iron core.
(B) IX-IX sectional view taken on the line.

FIG. 10 is a conceptual diagram showing a progressive die device for manufacturing a conventional laminated iron core.

FIG. 11 is a plan view showing a working mode for a strip-shaped steel plate when manufacturing a conventional laminated iron core.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Laminated iron core, 3 ... Salient pole, 1A-1J ... Iron core constituent piece, 1Aa-1Ja ... Salient pole constituent part, v ... Punching burr, 100 ... Progressive die apparatus.

Claims (3)

[Claims] 1. A laminated core comprising a core component having a salient pole component stamped and formed by press working and having a predetermined stacking thickness, wherein the core component located at one end and the other end. A laminated iron core, wherein the iron core constituent pieces located are laminated in such a manner that the punching burrs in the respective salient pole constituent portions are opposed to each other. 2. A method of manufacturing a laminated core in which iron core component pieces having salient pole component parts punched and formed by pressing are laminated on each other to form an integral structure, wherein the iron core component is laminated at one end of the laminated core. The punching direction of the salient pole forming portion of the core and the punching direction of the salient pole forming portion of the iron core forming piece laminated on the other end of the laminated iron core, A method of manufacturing a laminated core, characterized in that they are different from each other in a facing manner. 3. A plurality of iron core component pieces, which have salient pole component portions and crimping protrusions formed by press working in a progressive die apparatus, and which are pulled out to a blanking die and successively laminated, A method for manufacturing a laminated core in which the above-mentioned caulking protrusions are engaged with each other, wherein the caulking protrusions are pulled out to separate the laminated iron cores from each other, and the core structure is located at the bottom of the laminated iron core. When forming a salient pole constituent part on one piece, punching is performed from the lower side to the upper side, while salient pole constituent is formed on other iron core constituent pieces that are sequentially laminated to the iron core constituent piece located at the bottom of the laminated core. A method for manufacturing a laminated iron core, characterized in that when forming the portion, punching is performed from above to below.