JPS6246252B2 - - Google Patents
Info
- Publication number
- JPS6246252B2 JPS6246252B2 JP53048789A JP4878978A JPS6246252B2 JP S6246252 B2 JPS6246252 B2 JP S6246252B2 JP 53048789 A JP53048789 A JP 53048789A JP 4878978 A JP4878978 A JP 4878978A JP S6246252 B2 JPS6246252 B2 JP S6246252B2
- Authority
- JP
- Japan
- Prior art keywords
- protrusion
- electromagnetic steel
- steel sheet
- convex portion
- stepped
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 238000005520 cutting process Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- 238000004080 punching Methods 0.000 description 6
- 230000001154 acute effect Effects 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
Description
【発明の詳細な説明】
本発明は、複数枚の電磁鋼板を積層して成る電
気機器の積層鉄心に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laminated core for electrical equipment, which is formed by laminating a plurality of electromagnetic steel sheets.
従来薄板の電磁鋼板を複数枚重ねて電気機器の
積層鉄心にする結束方法としては、リベツトやク
ランプ金具などで締付ける方法が多く用いられて
きたが、これにはそれぞれに副資材と共に余分の
加工工数を必要としている。 Conventionally, the method of bundling multiple thin electromagnetic steel sheets together to form a laminated core for electrical equipment has often been by tightening them with rivets or clamps, but each method requires auxiliary materials and extra processing man-hours. need.
又、溶接も広く用いられているが、これには熱
によつて積層鉄心が歪んだり、溶接のための装置
を必要とするなどの短所がある。 Welding is also widely used, but it has drawbacks such as the laminated core being distorted by heat and the need for welding equipment.
この従来の電磁鋼板の局部を成形しその部分を
嵌め合わす方法として、第1図及び第2図に示す
ように円形の半抜突起2と同じく半抜凹部3を相
互に嵌め合わす方法があるが、結合力が弱いと言
う欠点がある。又、別の方法として第3図乃至第
5図に示すように、頂部が2本の平行線で囲まれ
た平坦部4を成す台形状の突起で相互に結合させ
る方法もある。この方法は有効接触部5が少なく
矢印で示す結合の作用力6の方向が2方向のみで
あり、又第5図で拡大して示す如く板厚の関係で
隙間7が生じ、結合部が分離しようとする分力が
潜在するなどの要因により、強い結合力が得られ
ない欠点がある。更にこの突起成形用パンチは第
6図乃至第8図に示すように、摩耗する毎に3方
の刃先面8を正確な山形に再研磨する必要があ
り、この精度管理の困難さも欠点である。 As a conventional method for forming local parts of an electromagnetic steel sheet and fitting the parts together, there is a method in which a circular half-cutting protrusion 2 and a half-cutting recess 3 are fitted together, as shown in FIGS. 1 and 2. , has the disadvantage of weak binding strength. As another method, as shown in FIGS. 3 to 5, there is a method in which they are connected to each other using trapezoidal protrusions whose apexes form a flat portion 4 surrounded by two parallel lines. In this method, the effective contact area 5 is small and the acting force 6 of the connection is applied in only two directions, as shown by the arrows. Also, as shown in an enlarged view in FIG. It has the disadvantage that strong bonding force cannot be obtained due to factors such as latent component forces. Furthermore, as shown in FIGS. 6 to 8, this protrusion forming punch requires re-sharpening of the three cutting edge surfaces 8 into accurate chevron shapes every time it wears out, and the difficulty of precision control is also a drawback. .
本発明の目的は、プレス加工にて強固な結合力
を供給する突起部を形成しこの突起部を有する電
磁鋼板を結束して成る電気機器の積層鉄心を提供
することにある。 An object of the present invention is to provide a laminated iron core for an electrical device, which is formed by forming a protrusion that provides a strong bonding force by press working and bundling electromagnetic steel plates having the protrusion.
以下本発明の一実施例を第9図乃至第17図に
より説明する。第9図は6個所の半抜きの突起部
により結束した回転電機の固定子鉄心の平面図
(図ではスロツト表示省略)で、第10図は第9
図の側面図である。第11図は突起部を拡大した
平面図で第12図は第11図の側面図、第13図
aは第11図の正面図で、第13図bは積層状態
の正面図である。第14図はパンチの正面図で、
第15図は第14図の矢印−線に沿つた
断面図で、第16図はダイの平面図、第17図は
第16図の矢印−線に沿つた断面図であ
る。 An embodiment of the present invention will be described below with reference to FIGS. 9 to 17. Figure 9 is a plan view of the stator core of a rotating electrical machine bound by six half-open protrusions (slots are omitted in the figure), and Figure 10 is a
FIG. 11 is an enlarged plan view of the projection, FIG. 12 is a side view of FIG. 11, FIG. 13a is a front view of FIG. 11, and FIG. 13b is a front view of the stacked state. Figure 14 is a front view of the punch.
15 is a sectional view taken along the arrow line in FIG. 14, FIG. 16 is a plan view of the die, and FIG. 17 is a sectional view taken along the arrow line in FIG. 16.
まず打抜き型を説明する。打抜きをするパンチ
は刃先13の断面が第15図に示す様に略凹レン
ズ形状で、この略凹レンズ形状は第14図に示す
様にパンチの軸方向中央部迄形成されている。こ
の刃先13は断面形状が略凹レンズ形状に形成さ
れているので、刃先13四隅の抑角度はパンチ径
の円形に対し鋭角となる。一方ダイは円筒形の第
16図に示す形状である。 First, the punching die will be explained. The cross section of the cutting edge 13 of the punch for punching has a substantially concave lens shape as shown in FIG. 15, and this substantially concave lens shape is formed up to the axial center of the punch as shown in FIG. 14. Since the cutting edge 13 has a substantially concave lens cross-sectional shape, the depression angles of the four corners of the cutting edge 13 are acute angles with respect to the circular shape of the punch diameter. On the other hand, the die has a cylindrical shape as shown in FIG.
これらのパンチとダイ間に電磁鋼板1aを挿入
し打抜き作業により、電磁鋼板1aの外周近傍に
一定間隔で複数個の縫目付ボール図形状の半抜き
の突起部9を穿設する。この突起部9は第11図
に示す様にまず外形を円形状に浅く切り込まれ、
次いで円周の一部を刃先13の両縁で打抜き、切
欠いた切欠き部10を夫々複数個所(図では2箇
所)設ける。この切欠き部10の形成により電磁
鋼板1aには切欠き穴10aが穿設される。 The electromagnetic steel sheet 1a is inserted between these punches and the die, and a plurality of half-cut protrusions 9 in the shape of a seamed ball are bored at regular intervals near the outer periphery of the electromagnetic steel sheet 1a. As shown in FIG. 11, this protrusion 9 is first cut into a shallow circular shape.
Next, a part of the circumference is punched out using both edges of the cutting edge 13, and a plurality of notches 10 (two in the figure) are provided in each of the circumferences. By forming this notch portion 10, a notch hole 10a is bored in the electromagnetic steel sheet 1a.
同時に、半抜き状態で略凹レンズ形状の段差凸
部16が形成される。この段差凸部16の両端面
は切欠き部10であり、又、両胴部は段差凸部1
6の突出により略凹レンズ形状の線に沿う段差線
15に沿つて凸レンズ形状の連結帯17があり、
この連結帯17を介して段差凸部16は電磁鋼板
1aと連結している。 At the same time, a substantially concave lens-shaped stepped convex portion 16 is formed in a half-opened state. Both end surfaces of this stepped convex portion 16 are notched portions 10, and both body portions are provided with the stepped convex portion 1.
There is a connecting band 17 in the shape of a convex lens along the step line 15 along the line of the substantially concave lens shape due to the protrusion of 6;
The stepped convex portion 16 is connected to the electromagnetic steel plate 1a via this connecting band 17.
一方この突起部9の突出による段差凸部16の
裏側には、この段差凸部16の裏面及び連結帯1
7の前記切欠き穴10aとで円形内に凹部12
(第13図a参照)が形成される。 On the other hand, on the back side of the stepped convex part 16 due to the protrusion of this protrusion part 9, the back side of this stepped convex part 16 and the connecting band 1
A recess 12 is formed in a circle with the notch hole 10a of No.7.
(see FIG. 13a) is formed.
上記打抜き過程で、刃先13の断面形状が略凹
レンズ形状で且つ刃先13はその四隅の仰角度が
パンチ径の円形に対し鋭角に形成されたものを使
用して剪断するので、段差凸部16四隅側面近傍
には断差線15に沿つて突起部9の円周に対し鋭
角に切断したエツジ11が夫々形成される。又、
同時に段差凸部16の裏面(=連結帯17の裏
面)四隅側面近傍にもエツジ11に対応してエツ
ジ11aが形成される。 In the above punching process, the cutting edge 13 has a substantially concave lens cross-sectional shape and the four corners of the cutting edge 13 are formed at acute angles with respect to the circular shape of the punch diameter. Edges 11 cut at an acute angle with respect to the circumference of the protrusion 9 along the line of cut 15 are formed near the side surfaces. or,
At the same time, edges 11a are formed in the vicinity of the four corner sides of the back surface of the stepped convex portion 16 (=the back surface of the connecting band 17) corresponding to the edges 11.
以上の様に切欠き部10、エツジ11、段差凸
部16、連結帯17等で構成された正面形状で見
れば略縫目付ボール図形状、断面では分銅形状に
突出した(第12図参照)半抜きの突起部9が形
成される。 As described above, the notch 10, the edge 11, the stepped convex part 16, the connecting band 17, etc. have a substantially seamed ball shape when viewed from the front, and protrude into a weight shape when viewed in cross section (see Figure 12). A half-open protrusion 9 is formed.
次にこの突起部9の作用について説明する。プ
レス作業により突起部9付で打抜かれた電磁鋼板
1aは、突起部9を重合する次の電磁鋼板1aの
凹部12に押圧密嵌させながら規程枚数積層さ
れ、第10図に示すような電気機器である回転電
機の固定子鉄心が形成される。この突起部9と凹
部12との押圧密嵌は、電磁鋼板1aに形成され
た突起部9の両端の切欠き部10と重合する他の
電磁鋼板1aに形成された凹部12の切欠き穴1
0aとが押圧密嵌すると共に、電磁鋼板1aに形
成された段差凸部16が重合する他の電磁鋼板1
aに形成された段差凸部16の裏面(連結帯17
間の裏面と同じ)に押圧密嵌することにより成り
立つている。特に段差凸部16の四隅は段差凸部
16が略凹レンズ形状であるため曲線形の末広形
となり、四隅近傍はプレス打抜きにより開放され
打抜による反発力が第11図の実線矢印で示すよ
うに周方向左右に拡張するように強く作用力6a
として働く。一方凹部12を構成する段差凸部1
6が密嵌する段差凸部16の裏面は、凸レンズ形
状の連結帯17の裏面でもありこの連結帯17の
四隅にも周方向左右に拡張する作用力が働くが、
これはあたかも段差凸部16の四隅近傍に点線矢
印で示すように周方向左右に縮少するように作用
力6bが働く。そして段差凸部16及び連結帯1
7裏面の夫々四隅側面にエツジ11及び11aが
形成されている。このためプレス作業で凹部12
のエツジ11aに段差凸部16を連結帯17間の
裏面へエツジ11aをエツジ11に無理に喰込む
ようにしながら押圧しなければ密嵌できず、密嵌
後は作用力6a,6bが曲線形で末広形の四隅近
傍へ相互に働くので強力に固着される。この本実
施例の係止作用力は、作用力6a及び6bの相互
作用とエツジ11及び11aどうしの押圧密嵌に
より従来より更に強力になつている。 Next, the function of this protrusion 9 will be explained. The electromagnetic steel sheets 1a punched out with the protrusions 9 by press work are stacked in a prescribed number of sheets while the protrusions 9 are press-tightly fitted into the recesses 12 of the next electromagnetic steel sheet 1a to be overlapped, resulting in an electrical device as shown in FIG. A stator core for a rotating electric machine is formed. This press-tight fit between the protrusion 9 and the recess 12 is achieved through the cutout hole 1 of the recess 12 formed in the other electromagnetic steel sheet 1a, which overlaps with the notch 10 at both ends of the protrusion 9 formed in the electromagnetic steel sheet 1a.
Another electrical steel sheet 1 in which the electrical steel sheet 1a is press-tightly fitted and the stepped convex portions 16 formed on the electrical steel sheet 1a overlap.
The back surface of the stepped convex portion 16 (connection band 17
(same as the back surface between). In particular, the four corners of the stepped convex portion 16 are curved and widened because the stepped convex portion 16 has a substantially concave lens shape, and the vicinity of the four corners are opened by press punching, and the repulsive force due to the punching is as shown by the solid line arrows in Fig. 11. A strong acting force 6a that expands to the left and right in the circumferential direction
Work as. On the other hand, the stepped convex portion 1 forming the concave portion 12
The back surface of the stepped convex portion 16 into which the connector 6 is tightly fitted is also the back surface of the convex lens-shaped connecting band 17, and the four corners of this connecting band 17 are also subjected to forces that expand left and right in the circumferential direction.
This is because the acting force 6b acts as if the stepped convex portion 16 is contracted in the left and right directions in the circumferential direction as shown by the dotted arrows near the four corners of the stepped convex portion 16. Then, the stepped convex portion 16 and the connecting band 1
Edges 11 and 11a are formed on the four corner sides of the back surface of 7, respectively. For this reason, the recess 12 is
A tight fit cannot be achieved unless the stepped convex portion 16 is pushed onto the edge 11a of the connecting band 17 while forcing the edge 11a into the edge 11. After the close fit, the acting forces 6a and 6b form a curved line. Since they work together near the four corners of the wide-end shape, they are strongly fixed. The locking force of this embodiment is stronger than the conventional one due to the interaction of the acting forces 6a and 6b and the press-tight fit between the edges 11 and 11a.
そしてこの結合による結束力を調査するため
に、積層方向を上下にして固定子鉄心を持上げる
という苛酷な条件で試験する時、剥離力は垂直直
線方向に働くので第3図に示す従来の様な結束箇
所が直接形状の突起部では直線方向の作用力6の
みであるから結束力が弱く剥離する。これに対し
本実施例では、第11図の一点鎖線Aで示す範囲
の結束箇所即ち円弧状の切欠き部10と略凹レン
ズ状の段差凸部16の四隅近傍に働く作用力6
a,6bの相互作用力及びエツジ11と、いずれ
も結束箇所が曲線部でありエツジ11は鋭角であ
るため剥離力は分力として結束箇所へ働くことに
より、強力な結束力のために容易に剥離しない。
尚、結束力の試験結果では従来1に対し本実施例
では約7.5倍の結束力があつた。 In order to investigate the cohesive force caused by this bond, when testing was carried out under the severe conditions of lifting the stator core with the stacking direction up and down, the peeling force acts in the vertical straight direction, so the conventional method shown in Figure 3 was used. In the case of a protrusion in which the binding point is a direct shape, only the acting force 6 in the linear direction is applied, so the binding force is weak and peeling occurs. On the other hand, in this embodiment, the acting force 6 acting on the binding portion in the range indicated by the dashed line A in FIG.
The interaction force of a and 6b and the edge 11, both of which have a curved part and the edge 11 has an acute angle, so the peeling force acts on the binding part as a component force, so it can be easily removed due to the strong binding force. Does not peel off.
Incidentally, the results of the cohesive force test showed that the cohesive force of this embodiment was about 7.5 times that of Conventional Example 1.
このため、突起部9の円径を小さくすることが
出来、これを固定子鉄心へ使用した時、磁束流れ
の阻害が少なくなり損失の少ない小形の固定子鉄
心となる。そして固定子鉄心の製造工程での結束
作業や運搬作業或いは次工程への搬送中等に、結
束力不足によつて振動・衝撃による積層鉄心から
電磁鋼板1aが単体又は積層体として剥離するこ
とがなくなり、固定子鉄心の耐振動・衝撃の信頼
性が向上すると共に、事故修理の減少により製品
価格は安くなる。又、固定子鉄心として電動機に
組込んだ時、電動機の電磁・機械振動に対しても
結束力が強いことから共振することがなく、電動
機としての振動及び騒音も減少する。 Therefore, the circular diameter of the protrusion 9 can be reduced, and when this is used in a stator core, the magnetic flux flow is less inhibited, resulting in a small stator core with less loss. This prevents the electromagnetic steel sheets 1a from peeling off from the laminated core as a single unit or as a laminate due to vibration or shock due to insufficient binding force during binding or transportation work in the manufacturing process of the stator core, or during transportation to the next process. In addition to improving the reliability of the stator core's vibration resistance and impact, the product price will be reduced due to fewer accidental repairs. Furthermore, when incorporated into an electric motor as a stator core, the binding force is strong against electromagnetic and mechanical vibrations of the electric motor, so there is no resonance, and the vibration and noise of the electric motor are reduced.
一方本実施例の場合、第14図及び第15図で
示すパンチで打抜き作業中に、パンチの刃先13
が摩耗した時でもパンチの形状が断面で略凹レン
ズ状であり、刃先13は平坦で従来の様に山形状
でないから研磨作業も平面研磨と簡単で寸法管理
も容易である。又、ダイも円筒状の簡単なもので
刃先14の再研磨も平面研磨と容易である。 On the other hand, in the case of this embodiment, during the punching operation with the punch shown in FIGS. 14 and 15, the cutting edge 13 of the punch
Even when the punch is worn out, the cross section of the punch is approximately concave lens-shaped, and the cutting edge 13 is flat and not in the shape of a mountain as in the conventional case, so the polishing work is simple as flat polishing, and dimensional control is also easy. Further, the die is a simple cylindrical die, and the cutting edge 14 can be easily reground by flat surface polishing.
尚結束用の突起の大きさ及び数と配置は、製品
の大きさ、積重ね量、電気特性等と突起を設ける
部分のスペースなどにより決められる。この突起
の形状には、長方形、多角形など種々あるが、適
用のし易さ、突起成形治具の製作、再研磨、補修
のし易さから円形が極めて有利な形状である。第
18図は本発明の変形例の突起部形状で、軸方向
に設けた凹溝を有する円形のパンチと、円形のダ
イとによつて成形することにより、広い接触面と
数箇所のエツジで強固に結束することができる。 The size, number, and arrangement of the bundling protrusions are determined by the size of the product, the amount of stacking, electrical characteristics, etc., and the space where the protrusions are provided. There are various shapes of the protrusions, such as rectangles and polygons, but a circular shape is extremely advantageous because of ease of application, ease of manufacturing the protrusion forming jig, ease of repolishing, and repair. Figure 18 shows the shape of a protrusion in a modified example of the present invention, which is formed by a circular punch with a groove provided in the axial direction and a circular die, resulting in a wide contact surface and several edges. Can be strongly bonded.
以上のように本発明によれば、円形状で切欠き
部を両端に有して成る略凹レンズ形状でエツジ付
の段差凸部を有する略縫目付ボール形状の半抜き
の突起部と、この突起部の突出により形成される
凹部との押出密嵌により、隣接する電磁鋼板どう
しを従来の突起結束よりも強力な結束で積層鉄心
が得られるので、結束の安定、大形製品への適用
が容易となつた効果がある。その他加工治具の製
作し易さ保守の容易と言う効果がある。 As described above, according to the present invention, there is provided a substantially seamed ball-shaped half-opening protrusion having a substantially concave lens shape having a circular notch at both ends and an edged stepped protrusion; By tightly extruding the recesses formed by the protruding parts, a laminated core can be obtained with stronger binding between adjacent electromagnetic steel plates than conventional protrusion binding, making the binding stable and easy to apply to large products. There is a certain effect. Other advantages include ease of manufacturing and maintenance of processing jigs.
第1図は従来の半抜突起の平面図、第2図は第
1図の−線に沿つた断面図、第3図は従来の
山形突起の平面図、第4図は第3図の−線に
沿つた断面図、第5図は第4図の拡大断面図、第
6図は従来の山形突起成形用パンチの正面図、第
7図は第6図の側面図、第8図は第6図の下面
図、第9図は本発明による一実施例を示す電気機
器の積層鉄心の平面図、第10図は第9図の側面
図、第11図は本発明の一実施例による突起の平
面図、第12図は第11図の側面図、第13図a
は第11図の正面図、第13図bは積層状態を示
す正面図、第14図は本発明の一実施例を示す突
起成形用パンチの正面図、第15図は第14図の
−線に沿つた断面図、第16図は本発明
の一実施例を示す突起成形用ダイの平面図、第1
7図は第16図の−線に沿つた断面図、
第18図は突起形状の変形例の平面図である。
1,1a……電磁鋼板、9……突起部、10…
…切欠き部、10a……切欠き穴、11,11a
……エツジ、12……凹部、15……段差線、1
6……段差凸部、17……連結帯。
Fig. 1 is a plan view of a conventional half-cut protrusion, Fig. 2 is a sectional view taken along the - line of Fig. 1, Fig. 3 is a plan view of a conventional chevron-shaped protrusion, and Fig. 4 is a - of Fig. 3. 5 is an enlarged sectional view of FIG. 4, FIG. 6 is a front view of a conventional chevron protrusion forming punch, FIG. 7 is a side view of FIG. 6, and FIG. 8 is a side view of FIG. 6 is a bottom view, FIG. 9 is a plan view of a laminated iron core for electrical equipment showing one embodiment of the present invention, FIG. 10 is a side view of FIG. 9, and FIG. 11 is a protrusion according to one embodiment of the present invention. Fig. 12 is a side view of Fig. 11, Fig. 13a is a plan view of
is a front view of FIG. 11, FIG. 13b is a front view showing a laminated state, FIG. 14 is a front view of a protrusion forming punch showing an embodiment of the present invention, and FIG. 15 is a front view of the - line in FIG. FIG. 16 is a plan view of a protrusion forming die showing an embodiment of the present invention, and FIG.
Figure 7 is a sectional view taken along the - line in Figure 16;
FIG. 18 is a plan view of a modified example of the protrusion shape. 1, 1a...Electromagnetic steel plate, 9...Protrusion, 10...
...Notch portion, 10a...Notch hole, 11, 11a
...edge, 12 ... recess, 15 ... step line, 1
6...Stepped convex portion, 17...Connection band.
Claims (1)
から突出させ、重合する他の電磁鋼板の凹みに嵌
合させ積層固着させて成る電気機器の積層鉄心に
於いて、前記電磁鋼板の外周近傍に、円形状でそ
の円周に沿つて円周の一部を切欠いた切欠き部を
両端に有する略凹レンズ形状の段差凸部を突設し
この段差凸部の四隅側面近傍に円周に対し鋭角と
なるエツジを設け前記段差凸部の胴部と連なる連
結帯とで形成される略縫目付ボール図形状の複数
個穿設した半抜きの突起部と、この突起部の突出
により円形内に形成される前記切欠き部に対応し
て穿設された切欠き穴と前記段差凸部の裏面及び
この裏面側面に前記エツジと対応して形成したエ
ツジと前記連結帯の裏面とで構成される凹部と、
前記突起部を重合する他の電磁鋼板の前記凹部へ
押圧することにより前記段差凸部をこれの裏面へ
又夫々のエツジ及び切欠き部と切欠き穴を夫々嵌
着させて積層したことを特徴とする電気機器の積
層鉄心。1. In a laminated core for an electrical device in which a part of each laminated electromagnetic steel sheet protrudes from the surface of the electromagnetic steel sheet and is fitted into a recess in another overlapping electromagnetic steel sheet to be laminated and fixed, the outer periphery of the electromagnetic steel sheet Nearby, a substantially concave lens-shaped stepped convex portion having a circular notch at both ends with a notch cut out a part of the circumference along the circumference is protruded, and a stepped convex portion protruding from the circumference near the four corner sides of this stepped convex portion is provided. A plurality of half-opened protrusions with an approximately seamed ball shape formed by an acute-angled edge and a connecting band connected to the body of the stepped protrusion, and the protrusion of these protrusions form a circular shape. a notch hole drilled corresponding to the notch formed in the step, a back surface of the stepped convex portion, an edge formed on a side surface of this back surface corresponding to the edge, and a back surface of the connecting band. a concave portion,
By pressing the protrusion into the recess of another electromagnetic steel plate to be superposed, the stepped protrusion is stacked onto the back surface of the other electromagnetic steel sheet by fitting the respective edges, notches, and holes into each other. Laminated cores for electrical equipment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4878978A JPS54141372A (en) | 1978-04-26 | 1978-04-26 | Bundling method for metallic sheets |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4878978A JPS54141372A (en) | 1978-04-26 | 1978-04-26 | Bundling method for metallic sheets |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54141372A JPS54141372A (en) | 1979-11-02 |
JPS6246252B2 true JPS6246252B2 (en) | 1987-10-01 |
Family
ID=12812993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4878978A Granted JPS54141372A (en) | 1978-04-26 | 1978-04-26 | Bundling method for metallic sheets |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54141372A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61249635A (en) * | 1985-04-26 | 1986-11-06 | Enami Seiki:Kk | Joining method for platelike member |
EP0306631B1 (en) * | 1987-09-08 | 1993-08-18 | Nippondenso Co., Ltd. | Metal plate laminated body |
JP4567722B2 (en) | 2007-12-26 | 2010-10-20 | 石川ガスケット株式会社 | Metal laminated cylinder head gasket |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4833871A (en) * | 1971-09-01 | 1973-05-14 |
-
1978
- 1978-04-26 JP JP4878978A patent/JPS54141372A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4833871A (en) * | 1971-09-01 | 1973-05-14 |
Also Published As
Publication number | Publication date |
---|---|
JPS54141372A (en) | 1979-11-02 |
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