CN103035374B - Laminated iron core and manufacture method thereof - Google Patents
Laminated iron core and manufacture method thereof Download PDFInfo
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- CN103035374B CN103035374B CN201210025355.7A CN201210025355A CN103035374B CN 103035374 B CN103035374 B CN 103035374B CN 201210025355 A CN201210025355 A CN 201210025355A CN 103035374 B CN103035374 B CN 103035374B
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- iron core
- riveted joint
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- unit plate
- joint projection
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Abstract
The present invention provides a kind of laminated iron core and manufacture method thereof, can not only get rid of gap each other from adjacent iron core unit plate, additionally it is possible to from getting rid of gap between bottom and the top of convex surface of the concave surface of adjacent riveted joint projection.Multiple iron core unit plates (11) in stacking are formed with riveted joint projection (12), the pair of angled portion (12a) that described riveted joint projection (12) is connected with iron core unit plate (11) integratedly by inclined in opposite directions each other and outer end, constitute with the connecting portion (12b) that the inner of these rakes is connected with each other, the surface of described riveted joint projection (12) and the back side are formed as convex surface (15) and concave surface (16), in each riveted joint projection (12), the wall thickness (T3) of connecting portion (12b) is set as identical with the wall thickness of iron core unit plate (11) (T1), and the wall thickness (T2) of pair of angled portion (12a) is set as thinner than the wall thickness of iron core unit plate (11) (T1).
Description
Technical field
The present invention relates to the improvement of laminated iron core and manufacture method thereof, multiple iron core unit flaggies are gathered into folds and are formed by described laminated iron core, it is formed with riveted joint projection and riveted holes at described each iron core unit plate, described riveted joint projection is constituted by pair of angled portion with by the connecting portion that the inner of these rakes is connected with each other, the pair of rake inclined in opposite directions each other and outer end are connected integratedly with iron core unit plate, surface and the back side of described riveted joint projection are formed as convex surface and concave surface, and two sides are formed as the shear plane cut off from iron core unit plate, what described riveted holes residued in this riveted joint projection cuts off vestige, and it is chimeric with the riveted joint projection of adjacent iron core unit plate.Described laminated iron core is for the iron core of electro-motor, electromotor and transformator etc..
Background technology
Described laminated iron core has been known as disclosed in following patent documentation 1 and 2.
Patent documentation 1: Japanese Unexamined Patent Publication 10-80078 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2006-166500 publication
In described laminated iron core, riveted joint projection for each iron core unit plate, when riveted joint projection is formed as identical with iron core unit wooden partition thickness, owing to the shape of convex surface is bigger than the shape of concave surface, therefore in stacking during multiple iron core unit plates, form gap each other and between bottom and the top of convex surface of the opposite concave surface of adjacent riveted joint projection at adjacent iron core unit plate, there is the problem that the performances such as the iron loss increase that causes laminated iron core reduce.
Therefore, in the laminated iron core that patent documentation 1 and 2 is recorded, a part at each iron core unit plate forms thinner wall section, and shape riveted joint projection in this thinner wall section, so that adjacent iron core unit plate is formed without the state of being close in gap each other, but, owing to riveted joint projection is formed as thin-walled in entire scope, therefore still there is gap between concave bottom and the top of convex surface of adjacent riveted joint projection, the performance of laminated iron core improves and insufficient.
Summary of the invention
The present invention completes in view of described situation just, its object is to provide a kind of described laminated iron core and its manufacture method, make can not only get rid of gap each other from adjacent iron core unit plate, and gap can be got rid of between bottom and the top of convex surface of the concave surface of adjacent riveted joint projection.
nullIn order to reach above-mentioned purpose，The present invention is a kind of laminated iron core，Multiple iron core unit flaggies are gathered into folds and are formed by described laminated iron core，It is formed with riveted joint projection and riveted holes at described each iron core unit plate，Described riveted joint projection is constituted by pair of angled portion with by the connecting portion that the inner of these rakes is connected with each other，The pair of rake inclined in opposite directions each other and outer end are connected integratedly with iron core unit plate，Surface and the back side of described riveted joint projection are formed as convex surface and concave surface，And the two sides of described riveted joint projection are formed as the shear plane cut off from iron core unit plate，What described riveted holes residued in this riveted joint projection cuts off vestige，And it is chimeric with the riveted joint projection of adjacent iron core unit plate，The fisrt feature of described laminated iron core is in that，In described each riveted joint projection，It is identical with the wall thickness of iron core unit plate that the wall thickness of described connecting portion is formed as，And the wall thickness of the pair of rake is formed as thinner than the wall thickness of iron core unit plate，Thus，When the riveted joint projection of each iron core unit plate is chimeric with the riveted holes of adjacent iron core unit plate，The described concave surface of each riveted joint projection is close to the described convex surface of adjacent riveted joint projection.
In addition, the second aspect of the present invention is, following operation is performed: the predetermined forming part of the described rake in iron core unit plate when manufacturing the laminated iron core of fisrt feature, utilize the first drift while making the wall thickness of this predetermined forming part reduce, the operation that the extrusion molding preliminary forming prominent to direction is raised；And after this operation, utilize the second drift make described preliminary forming projection reversion while to described riveted joint projection to other direction extrusion molding, thus, make in this riveted joint projection, the operation that only wall thickness of the wall ratio iron core unit plate of described rake is thin.
It addition, the third aspect of the present invention is, on the basis of second feature, the extrusion molding of described preliminary forming projection carries out in the way of making the complete cycle of this preliminary forming projection not cut off from iron core unit plate.
Additionally, the fourth aspect of the present invention is, on the basis of second feature, as described first drift, use along the transverse width in the direction of the boundary line between rake and the connecting portion of the described riveted joint projection drift less than the transverse width in the described direction of described second drift.
In accordance with the first feature of the invention, by multiple iron core unit plates by make riveted joint projection and riveted holes just in the way of stacking time, the riveted joint projection faced is mutually chimeric with riveted holes, and the wall thickness of the connecting portion of respectively riveted joint projection is identical with the wall thickness of iron core unit plate, and the wall thickness of the wall ratio iron core unit plate in pair of angled portion is thin, thus, adjacent iron core unit plate can not only be made seamlessly to be close to each other, and the convex surface of adjacent riveted joint projection and concave surface can be made seamlessly to be close to, it is possible to obtain the high performance laminated iron core that iron loss is few.
Second feature according to the present invention, owing to the rake of riveted joint projection is that the preliminary forming projection that made wall thickness thinning is extruded while reversion and is formed, therefore, the wall thickness that can make the wall ratio iron core unit plate of rake reduces, and the wall thickness connecting rake connecting portion each other is maintained into identical with the wall thickness of iron core unit plate, it is possible to it is readily derived the riveted joint projection of the structure with fisrt feature.And, after the shaping of riveted joint projection, it is not necessary to this riveted joint projection is applied the processing of any conquassation etc., therefore, it is possible to maintain higher by the dimensional accuracy of shear plane and riveted holes.
Third feature according to the present invention, when the extrusion molding of preliminary forming projection, has tensile load to the mass action of preliminary forming projection, it is possible to the entire scope in preliminary forming projection efficiently reduces wall thickness.
Fourth feature according to the present invention, when utilizing the second drift that riveted joint projection is carried out extrusion molding, remains the vestige of preliminary forming projection hardly at iron core unit plate, it is thus possible to obtain the iron core unit plate with riveted joint projection of high-quality.
Accompanying drawing explanation
Fig. 1 is the longitudinal cross-sectional side view (sectional view of 1-1 line along Fig. 2) of the laminated iron core that embodiments of the present invention relate to.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the specification figure (sectional view of 3-3 line along Fig. 4) shaping preliminary forming projection at iron core unit plate.
Fig. 4 is the sectional view of the 4-4 line along Fig. 3.
Fig. 5 is after the shaping of preliminary forming projection, shapes the specification figure (sectional view of 5-5 line along Fig. 6) of riveted joint projection at iron core unit plate.
Fig. 6 is the sectional view of the 6-6 line along Fig. 5.
Detailed description of the invention
Based on accompanying drawing embodiments of the present invention described below.
First, utilize Fig. 1 and Fig. 2 that the structure of laminated iron core 10 is illustrated.
Laminated iron core 10 is by multiple iron core unit plates 11,11 ... stacking is got up and formed.Be formed with riveted joint projection 12 and riveted holes 14 at described iron core unit plate 11, the two sides of described riveted joint projection 12 are the shear plane 13,13 cut off from iron core unit plate 11, and what described riveted holes 14 residued in this riveted joint projection 12 cuts off vestige.
Above-mentioned riveted joint projection 12 is made up of pair of angled portion 12a, 12a and connecting portion 12b, the pair of rake 12a, 12a inclined in opposite directions each other and outer end are connected integratedly with iron core unit plate 11, and the inner of these rakes 12a, 12a is connected with each other by described connecting portion.The surface of described riveted joint projection 12 and the back side are formed as trapezoidal convex surface 15 and concave surface 16, the boundary line L-orthogonal between described shear plane 13,13 and rake 12a and the connecting portion 12b of riveted joint projection 12.
In each riveted joint projection 12, the wall thickness T3 of connecting portion 12b is set as identical with the wall thickness T1 of iron core unit plate 11, the wall thickness T2 of pair of angled portion 12a, 12a is set as thinner than the wall thickness T1 of iron core unit plate 11.Thus, the shape of the trapezoidal convex surface 15 in each riveted joint projection 12 and concave surface 16 overlaps each other.
Thus, when the multiple iron core unit plates 11,11 being respectively formed with above-mentioned riveted joint projection 12 ... by make riveted joint projection 12 and riveted holes 14 just in the way of stacking time, the riveted joint projection 12 faced is chimeric each other with riveted holes 14, not only adjacent iron core unit plate 11,11 ... be seamlessly close to each other, and the convex surface 15 of adjacent riveted joint projection 12,12 is also seamlessly close to concave surface 16.In such manner, it is possible to obtain the high performance laminated iron core 10 that iron loss is few.
Then, the manufacture method of above-mentioned laminated iron core 10 is illustrated.
First, as shown in Figure 3 and Figure 4, the first drift 21 is made to extrude towards the predetermined forming part of rake 12a, 12a of the described riveted joint projection 12 in the first mould 20 iron core unit plate 11 to being supported by the first mould 20, thus in the predetermined forming part of described rake 12a, 12a, making its wall thickness be decreased to T2 extrusion molding a pair preliminary forming prominent to the first mould 20 side raised 19,19 from T1.
Now, each preliminary forming projection 19 is connected with iron core unit plate 11 integratedly in its complete cycle scope.Namely so that the complete cycle of preliminary forming projection 19 does not cut off from iron core unit plate 11.Like this, when the extrusion molding of preliminary forming projection 19, the overall of preliminary forming projection 19 extends, it is possible to the entire scope in preliminary forming projection 19 reduces wall thickness effectively.
As shown in Figure 5 and Figure 6, after the shaping of above-mentioned preliminary forming projection 19,19, utilize the second mould 22 that iron core unit plate 11 is supported in the face of preliminary forming projection 19,19 opposition side, then pass through and utilize the second drift 23 part being between preliminary forming projection 19,19 of iron core unit plate 11 to be extruded to the second mould 22 side, thus making preliminary forming projection 19,19 reverse while making described riveted joint projection 12 shape, and the two sides of preliminary forming projection 19,19 are cut off from iron core unit plate 11 and forms shear plane 13,13.Described riveted holes 14 is remained at this vestige of cutting off cut off.
So, riveted joint projection 12 is extrusion molding while making wall thickness reduce to preliminary forming projection 19,19 reversion of T2.As a result of which it is, preliminary forming projection 19,19 extends and constitutes rake 12a, 12a, therefore the wall thickness of rake 12a, 12a reflects the wall thickness T2 of preliminary forming projection 19,19.On the other hand, for connecting the connecting portion 12b between rake 12a, 12a, owing to extending hardly when the shaping of riveted joint projection 12, therefore the wall thickness T3 of connecting portion 12b is able to maintain that the wall thickness equal with the wall thickness T1 of iron core unit plate 11.Thus so that the trapezoidal convex surface 15 of iron core unit plate 11 overlaps each other with the shape of concave surface 16.
Additionally, after riveted joint is with the shaping of projection 12, riveted joint projection 12 will not be applied the processing such as any conquassation, therefore, it is possible to make the dimensional accuracy of shear plane 13,13 and riveted holes 14 maintain higher.
Then, as depicted in figs. 1 and 2, when making riveted joint projection 12 and riveted holes 14 just over the ground by multiple iron core unit plates 11,11 ... when stacking is got up, riveted joint projection 12 is mutually chimeric with riveted holes 14, adjacent iron core unit plate 11,11 can be made ... convex surface 15 and the concave surface 16 of riveted joint projection 12 snugly into each other and adjacent are also close to.It is additionally, since the shear plane 13,13 of riveted joint projection 12 and the dimensional accuracy height of riveted holes 14, is therefore mutually fitted together to by riveted joint projection 12 and riveted holes 14, it is possible to increase adjacent iron core unit plate 11,11 positional precision each other.Thus, it is possible to manufacture the high performance laminated iron core 10 that dimensional accuracy is high and iron loss is few.
In addition, for the first drift 21 in iron core unit plate 11 extrusion molding preliminary forming projection 19,19, the drift that the transverse width W1 in the direction of the boundary line L between the rake 12a and connecting portion 12b of use edge riveted joint projection 12 than the described direction of the second drift 23 is little for transverse width W2.Like this, when utilizing the second drift 23 to make riveted joint projection 12 extrusion molding, the vestige of preliminary forming projection 19,19 can be remained hardly at iron core unit plate 11, it is thus possible to obtain the iron core unit plate 11 with riveted joint projection 12 of high-quality.
The present invention is not limited to above-mentioned embodiment, it is possible to carry out various design alteration in without departing from the scope of its purport.Such as, in riveted joint with in projection 12, it is also possible to smooth connecting portion 12b to be replaced with the connecting portion 12b of arc-shaped.
Claims (3)
- null1. the manufacture method of a laminated iron core，This laminated iron core is by multiple iron core unit plates (11、11 ...) stacking gets up and formed，At described each iron core unit plate (11、11 ...) it is formed with riveted joint projection (12) and riveted holes (14)，Described riveted joint projection (12) is by pair of angled portion (12a、12a) with by these rakes (12a、The connecting portion (12b) that the inner 12a) is connected with each other is constituted，The pair of rake (12a、12a) inclined in opposite directions and outer end are connected integratedly with iron core unit plate (11) each other，The surface of described riveted joint projection (12) and the back side are formed as convex surface (15) and concave surface (16)，And the two sides of described riveted joint projection (12) are formed as the shear plane (13 cut off from iron core unit plate (11)、13)，What described riveted holes (14) residued in this riveted joint projection (12) cuts off vestige，And it is chimeric with the riveted joint projection (12) of adjacent iron core unit plate (11)，And，In described each riveted joint projection (12)，The wall thickness (T3) of described connecting portion (12b) is formed as identical with the wall thickness of iron core unit plate (11) (T1)，And by the pair of rake (12a、Wall thickness (T2) 12a) is formed as thinner than the wall thickness of iron core unit plate (11) (T1)，Thus，When the riveted joint projection (12) of each iron core unit plate (11) is chimeric with the riveted holes (14) of adjacent iron core unit plate (11)，Each described concave surface (16) of riveted joint projection (12) is close to the described convex surface (15) of adjacent riveted joint projection (12)，It is characterized in that,Following operation is performed when manufacturing described laminated iron core:The predetermined forming part of the described rake (12a, 12a) in iron core unit plate (11), utilize the first drift (21) while making the wall thickness of this predetermined forming part reduce, the operation of the preliminary forming raised (19,19) that extrusion molding is prominent to direction；AndAfter this operation, utilize the second drift (23) while making described preliminary forming projection (19,19) reverse to described riveted joint projection (12) to other direction extrusion molding, thus, make in this riveted joint projection (12), the operation that only wall thickness (T2) of described rake (12a, 12a) is thinner than the wall thickness of iron core unit plate (11) (T1).
- 2. the manufacture method of laminated iron core according to claim 1, it is characterised in thatThe extrusion molding of described preliminary forming projection (19,19) is so that the mode that the complete cycle of this preliminary forming projection (19,19) does not cut off from iron core unit plate (11) carries out.
- 3. the manufacture method of laminated iron core according to claim 1, it is characterised in thatAs described first drift (21), use along the transverse width (W1) in the direction of the boundary line (L) between the rake (12a) and connecting portion (12b) of described riveted joint projection (12) drift less than the transverse width (W2) in the described direction of described second drift (23).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-220765 | 2011-10-05 | ||
| JP2011220765A JP5734153B2 (en) | 2011-10-05 | 2011-10-05 | Manufacturing method of laminated iron core |
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| Publication Number | Publication Date |
|---|---|
| CN103035374A CN103035374A (en) | 2013-04-10 |
| CN103035374B true CN103035374B (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210025355.7A Active CN103035374B (en) | 2011-10-05 | 2012-02-06 | Laminated iron core and manufacture method thereof |
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| JP (1) | JP5734153B2 (en) |
| CN (1) | CN103035374B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6401466B2 (en) * | 2014-03-10 | 2018-10-10 | 株式会社三井ハイテック | Laminated iron core and method for manufacturing the same |
| JP6210058B2 (en) | 2014-12-26 | 2017-10-11 | Ｊｆｅスチール株式会社 | Punching method for laminated iron core and method for producing laminated iron core |
| JP6248965B2 (en) * | 2015-02-18 | 2017-12-20 | トヨタ自動車株式会社 | Manufacturing method of core of rotating electrical machine |
| CN111095750B (en) * | 2017-09-29 | 2022-06-28 | 株式会社爱信 | Method for manufacturing core for rotating electrical machine |
| JP2020150627A (en) * | 2019-03-12 | 2020-09-17 | 日本電産株式会社 | Laminated iron core, stator, and rotor |
| CN110918777B (en) * | 2019-12-16 | 2021-07-06 | 宁波震裕科技股份有限公司 | Method for manufacturing laminated iron core |
| CN113996693B (en) * | 2021-11-15 | 2022-11-15 | 燕山大学 | Method for preparing motor iron core |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH1080078A (en) * | 1996-08-30 | 1998-03-24 | Mitsui High Tec Inc | Laminated iron core and its manufacturing method |
| JP2006025533A (en) * | 2004-07-07 | 2006-01-26 | Mitsui High Tec Inc | Caulking structure of laminated iron core |
| JP2008011615A (en) * | 2006-06-28 | 2008-01-17 | Mitsui High Tec Inc | Method of manufacturing laminated core, and that laminated core |
| JP2008029169A (en) * | 2006-07-25 | 2008-02-07 | Mitsui High Tec Inc | Layered iron core |
| JP5596961B2 (en) * | 2009-11-16 | 2014-09-24 | 株式会社三井ハイテック | Stator core and manufacturing method thereof |
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| JP2013080853A (en) | 2013-05-02 |
| JP5734153B2 (en) | 2015-06-10 |
| CN103035374A (en) | 2013-04-10 |
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