WO1990009863A1 - Method of welding motor stator - Google Patents

Method of welding motor stator Download PDF

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Publication number
WO1990009863A1
WO1990009863A1 PCT/JP1990/000131 JP9000131W WO9009863A1 WO 1990009863 A1 WO1990009863 A1 WO 1990009863A1 JP 9000131 W JP9000131 W JP 9000131W WO 9009863 A1 WO9009863 A1 WO 9009863A1
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WIPO (PCT)
Prior art keywords
welding
motor stator
laser beam
reflection
jig
Prior art date
Application number
PCT/JP1990/000131
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French (fr)
Japanese (ja)
Inventor
Takeji Arai
Original Assignee
Fanuc Ltd
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Filing date
Publication date
Application filed by Fanuc Ltd filed Critical Fanuc Ltd
Publication of WO1990009863A1 publication Critical patent/WO1990009863A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/28—Seam welding of curved planar seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys

Definitions

  • the present invention relates to a method for welding a motor stator configured by laminating a plurality of steel plates, and more particularly to a method for welding a motor stator that performs welding using laser light.
  • Fig. 3 (a) shows a conceptual diagram of a conventional motor stator welding method
  • Fig. 3 (b) shows its BB cross-sectional view.
  • the motor stator 10 is formed by laminating a large number of thin silicon steel sheets, and has grooves 11a to 11h on the outer periphery. Apply disc-shaped fastening jigs 12a and 12b to the ends 10a and 10b, and tighten nuts 14a to 14d through bolts 13a and 13b during this time The motor stator 10 is temporarily assembled.
  • the surface of the bead 1 mm has an ⁇ protrusion, which must be polished along the outer periphery of the motor stay. You.
  • FIG. 4 This drawing is a partial plan view of Fig. 3 (a).
  • the bead 17 is dented at the welding start point 18a, and the bead 17 protrudes at the end point 18b. This protruding part must also be polished.
  • the present invention has been made in view of such a point, and an object of the present invention is to provide a motor stator welding method for performing welding by laser light.
  • a method for welding a motor stator constituted by laminating a plurality of steel plates reflection jigs for reflecting laser light are brought into close contact with both ends of the motor stator, and the outer periphery of the motor stator is irradiated with laser light.
  • a motor stay overnight welding method characterized by performing line welding between the steel plates by moving the steel plates in the stacking direction of the steel plates.
  • a reflection jig that reflects laser light is adhered to both ends, and the laser light is irradiated to the outer periphery while moving in the lamination direction of the steel sheet to perform line welding.
  • the reflection jig is not heated by the laser beam, and only the steel plate is welded. In this case, a groove for inserting a welding wire and a welding wire is unnecessary.
  • FIG. 1 (a) is a conceptual diagram of a motor stay overnight welding method according to one embodiment of the present invention.
  • Fig. 1 (b) is a right side view of Fig. 1 (a)
  • Fig. 1 (c) is a sectional view taken along the line A-A of Fig. 1 (a),
  • FIG. 2 is a partial plan view of FIG. 1 (a)
  • Fig. 3 (a) is a conceptual diagram of a conventional motor stator welding method
  • Fig. 3 (b) is a BB sectional view of Fig. 3 (a),.
  • FIG. 4 is a partial plan view of FIG. 3 (a).
  • FIG. 1 (a) is a conceptual diagram of a method for welding a motor stator according to one embodiment of the present invention.
  • FIG. 1 (b) is a right side view thereof, and
  • FIG. 1 (c) is a sectional view taken along line AA. And will be described with reference to these figures.
  • the motor stator 1 is formed by laminating a number of thin silicon steel plates, and its outer peripheral portion is smooth. Disc-shaped fastening jigs 2a and 2b are applied to the ends 1a and 1b, and nuts 4a to 4d are temporarily tightened through bolts 3a and 3b during this time.
  • the reflection jigs 5a and 5b are made of copper, nickel or the like having a high reflectivity to the laser beam and are formed in a cylindrical shape, and are fitted to the outside of the clamping jigs 2a and 2b, respectively.
  • the cylindrical surfaces of the reflection jigs 5a and 5b are not perpendicular to the laser light incident surface but have an inclination of 20 to 45 °, so that the reflected light goes back to the laser output mirror or resonator. Preventing, In this way, the secondary reflection is weak, and it is safe enough to shield the axle.
  • the reflecting jigs 5a and 5b are attached to the spindle 6 of the numerically controlled machine tool so as to be pressed from both sides by other jigs (not shown). And 1b.
  • the laser beam 8 introduced into the processing head 7 is condensed by the condensing lens 7a, radiated from the nozzle 7b to the outer periphery of the motor stator, and the tip of the nozzle 7b is set at the end 1a. And 1b are moved at a speed of about 1 to 1.5 mZ in the Z-axis direction between the points P1 and P2 located outside by ⁇ z.
  • a sufficient penetration depth of 3 to 5 mm is formed between the silicon steel plates of the motor stator 1 and the outer peripheral surface is smoothly line welded.
  • the reflecting jigs 5a and 5b are irradiated with the laser beam 8, but the reflecting jigs 5a and 5b are not heated because of their high reflectivity to the laser beam. Only the silicon steel plate is welded.
  • FIG. This drawing is a partial plan view of FIG. 1 (a), and the bead 9 does not dent at the end 1a and does not flow out of the end 1b. This greatly reduces post-weld polishing.
  • the main shaft 6 shown in Fig. 1 (a) is rotated by a predetermined angle under C-axis control, and the laser beam 8 is irradiated and the nozzle 7b is moved in the same manner. Repeat the number of times.
  • Laser welding reduces distortion after welding because the total amount of energy is small.
  • reflection jigs that reflect laser light are brought into close contact with both ends of a steel plate constituting a motor stator, and the laser light is irradiated to the outer peripheral portion while moving in the stacking direction of the steel plates.

Abstract

A method of welding a motor stator that is constituted by laminating a plurality of steel plates. Reflection jigs (5a, 5b) for reflecting the laser beam are intimately attached to both ends (1a, 1b) of the motor stator (1) and the steel plates are moved in the direction of the laminated layer and are line-welded together while irradiating the outer circumference of the motor stator (1) with a laser beam (8). The reflection jigs (5a, 5b) reflect the laser beam (8) but are not heated, and only portions of the steel plates (1) are welded. Therefore, the beads are not disturbed at the beginning and end of the welding, and the outer circumference is smoothly finished.

Description

明 細 書 モータステータの溶接方法 技 術 分 野  Specification Welding method for motor stator Technical field
本発明は複数枚の鋼板を積層して構成されるモータ ステ タの溶接方法に関し、 特にレーザ光によって溶接を行うモ タステータの溶接方法に関する。 背 景 技 術  The present invention relates to a method for welding a motor stator configured by laminating a plurality of steel plates, and more particularly to a method for welding a motor stator that performs welding using laser light. Background technology
従来のモータステータの溶接方法の概念図を第 3図 （a) に、 その B— B断面図を第 3図 （b) に示す。  Fig. 3 (a) shows a conceptual diagram of a conventional motor stator welding method, and Fig. 3 (b) shows its BB cross-sectional view.
図において、 モータ ステータ 1 0は薄い硅素鋼板を多数枚 積層して構成されており、 外周部に溝 1 1 a〜 l 1 hを設け ている。 端部 1 0 a及び 1 0 bには円板形状の締めつけ治具 1 2 a及び 1 2 bを当て、 この間にボルト 1 3 a及び 1 3 b を通してナツ ト 1 4 a〜 l 4 dを締めつけてモータステータ 1 0を仮組みしている。  In the figure, the motor stator 10 is formed by laminating a large number of thin silicon steel sheets, and has grooves 11a to 11h on the outer periphery. Apply disc-shaped fastening jigs 12a and 12b to the ends 10a and 10b, and tighten nuts 14a to 14d through bolts 13a and 13b during this time The motor stator 10 is temporarily assembled.
そして、 溝 1 1 aに溶接ヮィャを挿入し、 電極 1 5 aとモ 一タステ一タ 1 0間に所定の電圧を印加してアーク 1 6を発 生させ、 トーチ 1 5を 0. 2〜 0. 5 ιηΖ分の速度で溝に沿 つて移動させてミ グ溶接を行う。 以下、 同様な方法で溝 1 1 b〜； L 1 hを溶接して固定する。 ハ  Then, a welding wire is inserted into the groove 11a, a predetermined voltage is applied between the electrode 15a and the monitor 10 to generate an arc 16, and the torch 15 is moved from 0.2 to Mig welding is performed by moving along the groove at a speed of 0.5 ιηΖ. Hereinafter, grooves 1 1b to L 1 h are welded and fixed in the same manner. C
しかし、 溶接後はビード 1 Ίの表面に ω凸を生じるので、 これをモータステ一夕の外周形状に沿って研磨する必要があ る。 However, after welding, the surface of the bead 1 mm has an ω protrusion, which must be polished along the outer periphery of the motor stay. You.
また、 一般に溶接の開始点及び終点でビードが乱れる。 こ の様子を第 4図に示す。 本図は第 3図 （ a ) の部分平面図で あり、 溶接の開始点 1 8 aではビード 1 7がへこみ、 逆に終 点 1 8 bではビード 1 7が突き出てしまう。 この突き出た部 分も研磨しなければならない。  In addition, beads are generally disturbed at the start and end points of welding. This is shown in Figure 4. This drawing is a partial plan view of Fig. 3 (a). The bead 17 is dented at the welding start point 18a, and the bead 17 protrudes at the end point 18b. This protruding part must also be polished.
さらに、 溶接の際の過入熱によって形状に歪みを生じる。 発 明 の 開 示  In addition, the shape is distorted due to excessive heat input during welding. Disclosure of the invention
本発明はこのような点に鑑みてなされたものであり、 レ一 ザ光によって溶接を行うモータステータの溶接方法を提供す ることを目的とする。  The present invention has been made in view of such a point, and an object of the present invention is to provide a motor stator welding method for performing welding by laser light.
本発明では上記課題を解決するために、  In the present invention, in order to solve the above problems,
複数枚の鋼板を積層して構成されるモータステータの溶接 方法において、 前記モータステータの両端部にレーザ光を反 射する反射治具を密着させ、 前記モータステータの外周部に レーザ光を照射すると共に、 前記鋼板の積層方向に移動して 前記各鐧板間をラィ ン溶接することを特徵とするモータステ 一夕の溶接方法が提供される。  In a method for welding a motor stator constituted by laminating a plurality of steel plates, reflection jigs for reflecting laser light are brought into close contact with both ends of the motor stator, and the outer periphery of the motor stator is irradiated with laser light. In addition, there is provided a motor stay overnight welding method characterized by performing line welding between the steel plates by moving the steel plates in the stacking direction of the steel plates.
両端部にレーザ光を反射する反射治具を密着させ、 レーザ 光を鋼板の積層方向に移動させながら外周部に照射してライ ン溶接を行う。 反射治具はレーザ光によって加熱されず、 鋼 板の部分のみが溶接される。 この場合、 溶接ワイヤ、 及び溶 接ワイヤを揷入するための溝は不要である。 図 面 の 簡 単 な 説 明 A reflection jig that reflects laser light is adhered to both ends, and the laser light is irradiated to the outer periphery while moving in the lamination direction of the steel sheet to perform line welding. The reflection jig is not heated by the laser beam, and only the steel plate is welded. In this case, a groove for inserting a welding wire and a welding wire is unnecessary. Brief explanation of drawings
第 1図 （ a ) は本発明の一実施例のモータステ一夕の溶接 方法の概念図、  FIG. 1 (a) is a conceptual diagram of a motor stay overnight welding method according to one embodiment of the present invention.
第 1図 （ b ) は第 1図 （ a ) の右側面図、  Fig. 1 (b) is a right side view of Fig. 1 (a),
第 1図 （ c ) は第 1図 （ a ) の A— A断面図、  Fig. 1 (c) is a sectional view taken along the line A-A of Fig. 1 (a),
第 2図は第 1図 （ a ) の部分平面図、  FIG. 2 is a partial plan view of FIG. 1 (a),
第 3図 （ a ) は従来のモータステ一タの溶接方法の概念図、 第 3図 （ b ) は第 3図 （ a ) の B— B断面図、 .  Fig. 3 (a) is a conceptual diagram of a conventional motor stator welding method, Fig. 3 (b) is a BB sectional view of Fig. 3 (a),.
第 4図は第 3図 （ a ) の部分平面図である。 発明を実施するための最良の形態  FIG. 4 is a partial plan view of FIG. 3 (a). BEST MODE FOR CARRYING OUT THE INVENTION
以下、 本発明の一実施例を図面に基づいて説明する。  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第 1図 （ a ) は本発明の一実施例のモータステータの溶接 方法の概念図であり、 第 1図 （ b) はその右側面図、 第 1図 ( c ) は A— A断面図を示し、 これらの図を同時に参照して 説明する。 モータステータ 1は薄い硅素鐧板を多数枚 層し て構成され、 その外周部は滑らかである。 端部 1 a及び 1 b には円板形状の締めつけ治具 2 a及び 2 bを当て、 この間に ボルト 3 a及び 3 bを通してナツ ト 4 a〜 4 dを締めつけて 仮組みしている。 反射治具 5 a及び 5 bはレーザ光に対する 反射率の高い銅またはニッケル等で円筒状に構成されており， それぞれ締めつけ治具 2 a及び 2 bの外側に嵌め込まれる。 反射治具 5 a及び 5 bの円筒面は、 レーザ光の入射面に対 して垂直ではなく、 2 0〜 4 5 ° の傾斜をもっており、 反射 光がレーザ出力鏡あるいは共振器に逆行するのを防いでいる, このようにすれば 2次反射は弱く、 アク リル等の遮蔽で十分 安全となる。 この反射治具 5 a及び 5 bは、 さらに図示しな い別の治具によつて両側から押しつけられるようにして数値 制御工作機械の主軸 6に取りつけられ、 これにより両端部の 硅素鋼板 1 a及び 1 bに密着される。 FIG. 1 (a) is a conceptual diagram of a method for welding a motor stator according to one embodiment of the present invention. FIG. 1 (b) is a right side view thereof, and FIG. 1 (c) is a sectional view taken along line AA. And will be described with reference to these figures. The motor stator 1 is formed by laminating a number of thin silicon steel plates, and its outer peripheral portion is smooth. Disc-shaped fastening jigs 2a and 2b are applied to the ends 1a and 1b, and nuts 4a to 4d are temporarily tightened through bolts 3a and 3b during this time. The reflection jigs 5a and 5b are made of copper, nickel or the like having a high reflectivity to the laser beam and are formed in a cylindrical shape, and are fitted to the outside of the clamping jigs 2a and 2b, respectively. The cylindrical surfaces of the reflection jigs 5a and 5b are not perpendicular to the laser light incident surface but have an inclination of 20 to 45 °, so that the reflected light goes back to the laser output mirror or resonator. Preventing, In this way, the secondary reflection is weak, and it is safe enough to shield the axle. The reflecting jigs 5a and 5b are attached to the spindle 6 of the numerically controlled machine tool so as to be pressed from both sides by other jigs (not shown). And 1b.
そして、 加工へッ ド 7に導入したレーザ光 8を集光レンズ 7 aで集光し、 ノズル 7 bよりモータステータの外周部に照 射すると共に、 ノ ズル 7 bの先端を端部 1 a及び 1 bよりも それぞれ Δ zだけ外側に位置する点 P 1 と点 P 2間を Z軸方 向に 1〜 1 . 5 m Z分程度の速度で移動させる。  Then, the laser beam 8 introduced into the processing head 7 is condensed by the condensing lens 7a, radiated from the nozzle 7b to the outer periphery of the motor stator, and the tip of the nozzle 7b is set at the end 1a. And 1b are moved at a speed of about 1 to 1.5 mZ in the Z-axis direction between the points P1 and P2 located outside by Δz.
これにより、 モータステータ 1の各硅素鋼板間が第 1図 （ c ) に示すように 3〜 5 m mの充分な溶け込み深さで、 且つ 外周部の表面が滑らかにライ ン溶接される。 始点 P 1及び終 点 P 2の付近では反射治具 5 a及び 5 bにレーザ光 8が照射 されるが、 反射治具 5 a及び 5 bはレーザ光に対する反射率 が高いので加熱されず、 硅素鋼板部分のみが溶接される。  As a result, as shown in FIG. 1 (c), a sufficient penetration depth of 3 to 5 mm is formed between the silicon steel plates of the motor stator 1 and the outer peripheral surface is smoothly line welded. In the vicinity of the start point P1 and the end point P2, the reflecting jigs 5a and 5b are irradiated with the laser beam 8, but the reflecting jigs 5a and 5b are not heated because of their high reflectivity to the laser beam. Only the silicon steel plate is welded.
この様子を第 2図に示す。 本図は第 1図 （ a ) の部分平面 図であり、 ビード 9は端部 1 aでへこみを生ぜず、 且つ端部 1 bの外側に流れ出していない。 これにより、 溶接後の研磨 は大幅に低減される。  This is shown in FIG. This drawing is a partial plan view of FIG. 1 (a), and the bead 9 does not dent at the end 1a and does not flow out of the end 1b. This greatly reduces post-weld polishing.
この溶接工程が終了したら、 第 1図 （ a ) に示す主軸 6を C軸制御によって所定角度回転し、 同様な方法でレーザ光 8 の照射とノ ズル 7 bの移動を行い、 以下これを所要回数繰り 返す。 レーザ光による溶接はェネルギー総量が少ないために、 溶接後の歪みが少ない。 以上説明したように本発明では、 モータステータを構成す る鋼板の両端部にレーザ光を反射する反射治具を密着させ、 レーザ光を鋼板の積層方向に移動させながら外周部に照射し てライ ン溶接を行うので、 溶接の開始点及び終点でビードが 乱れず、 外周部も平滑に仕上がり、 溶接後の研磨が不要であ また、 レーザ溶接であるから溶接後の歪みが少なく、 充分 な溶け込み深さが得られて溶接強度も高い。 この場合、 溶接 ワイヤを挿入するための溝が不要なので、 鑭板の形状も簡素 化される。 When the welding process is completed, the main shaft 6 shown in Fig. 1 (a) is rotated by a predetermined angle under C-axis control, and the laser beam 8 is irradiated and the nozzle 7b is moved in the same manner. Repeat the number of times. Laser welding reduces distortion after welding because the total amount of energy is small. As described above, according to the present invention, reflection jigs that reflect laser light are brought into close contact with both ends of a steel plate constituting a motor stator, and the laser light is irradiated to the outer peripheral portion while moving in the stacking direction of the steel plates. Since welding is performed, the bead is not disturbed at the start and end points of the welding, the outer periphery is finished smoothly, and polishing after welding is unnecessary.Because it is laser welding, distortion after welding is small and sufficient penetration High depth and high welding strength. In this case, since the groove for inserting the welding wire is unnecessary, the shape of the backing plate is also simplified.
さらに、 数値制御装置によって工程を制御するので、 高速 度で高能率の溶接が行える。  Furthermore, since the process is controlled by the numerical controller, high-speed and high-efficiency welding can be performed.

Claims

請 求 の 範 囲 The scope of the claims
1 . 複数枚の鋼板を積層して構成されるモータステータの 溶接方法において、  1. In a motor stator welding method configured by laminating a plurality of steel plates,
前記モータステータの両端部にレーザ光を反射する反射治 具を密着させ、  A reflection jig for reflecting laser light is brought into close contact with both ends of the motor stator,
前記モータステ一夕の外周部にレーザ光を照射すると共に、 前記鋼板の積層方向に移動して前記各鋼板間をライ ン溶接す ることを特徴とするモータステータの溶接方法。  A method for welding a motor stator, comprising: irradiating a laser beam to an outer peripheral portion of the motor stay, moving the steel sheet in a laminating direction, and performing line welding between the steel sheets.
2 . 前記鋼板を予め締めつけ治具によって積層方向に締め つけることを特徵とする特許請求の範囲第 1項記載のモータ ステータの溶接方法。  2. The method for welding a motor stator according to claim 1, wherein the steel plate is previously tightened in a stacking direction by a tightening jig.
3 . 前記反射治具は前記締めつけ治具に対して前記レーザ 光の照射を遮蔽するように構成することを特徵とする特許請 求の範囲第 1項記載のモータステータの溶接方法。  3. The welding method for a motor stator according to claim 1, wherein the reflection jig is configured to block the irradiation of the laser beam with respect to the fastening jig.
4 . 前記ライ ン溶接の溶接工程は数値制御装置 （C N C ) によって制御することを特徵とする特許請求の範囲第 1項記 載のモータステータの溶接方法。  4. The welding method for a motor stator according to claim 1, wherein the welding process of the line welding is controlled by a numerical controller (CNC).
5 . 前期反射治具の円筒面に 2 0〜 4 5 ° の傾斜を設けた ことを特徵とする特許請求の範囲第 1項記載のモータステ一 夕の溶接方法。  5. The method of claim 1, wherein the cylindrical surface of the reflection jig has an inclination of 20 to 45 °.
PCT/JP1990/000131 1989-02-22 1990-02-01 Method of welding motor stator WO1990009863A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1042430A JPH02220790A (en) 1989-02-22 1989-02-22 Welding method for motor stator
JP1/42430 1989-02-22

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Publication Number Publication Date
WO1990009863A1 true WO1990009863A1 (en) 1990-09-07

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Cited By (3)

* Cited by examiner, † Cited by third party
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US6249072B1 (en) 1997-10-17 2001-06-19 Seiko Epson Corporation Motor laminated core, method of manufacturing same, motor and ink jet recording device
WO2004030179A1 (en) * 2002-09-20 2004-04-08 Robert Bosch Gmbh Stator and electrical machine
WO2020084904A1 (en) * 2018-10-26 2020-04-30 株式会社三井ハイテック Method for manufacturing laminated core

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SI24532A (en) * 2013-11-05 2015-05-29 Nela, Razvojni Center Za Elektroindustrijo In Elektroniko, D.O.O. Adaptive laser bonding of the stator and rotor laminations
JP2017221085A (en) * 2016-06-10 2017-12-14 東芝産業機器システム株式会社 Manufacturing method for stator core and stator core
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Cited By (8)

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Publication number Priority date Publication date Assignee Title
US6249072B1 (en) 1997-10-17 2001-06-19 Seiko Epson Corporation Motor laminated core, method of manufacturing same, motor and ink jet recording device
US6448682B2 (en) 1997-10-17 2002-09-10 Seiko Epson Corporation Motor laminated core, method of manufacturing same, motor and ink jet recording device
WO2004030179A1 (en) * 2002-09-20 2004-04-08 Robert Bosch Gmbh Stator and electrical machine
CN100367630C (en) * 2002-09-20 2008-02-06 罗伯特·博世有限公司 Stator and electrical machine
US7761975B2 (en) 2002-09-20 2010-07-27 Robert Bosch Gmbh Method of making a stator of an electrical machine
WO2020084904A1 (en) * 2018-10-26 2020-04-30 株式会社三井ハイテック Method for manufacturing laminated core
JP2020068622A (en) * 2018-10-26 2020-04-30 株式会社三井ハイテック Manufacturing method for laminated core
JP7158241B2 (en) 2018-10-26 2022-10-21 株式会社三井ハイテック Laminated core manufacturing method

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