JPH02214449A - Manufacture of rotor for squirrel-cage motor - Google Patents

Manufacture of rotor for squirrel-cage motor

Info

Publication number
JPH02214449A
JPH02214449A JP3322489A JP3322489A JPH02214449A JP H02214449 A JPH02214449 A JP H02214449A JP 3322489 A JP3322489 A JP 3322489A JP 3322489 A JP3322489 A JP 3322489A JP H02214449 A JPH02214449 A JP H02214449A
Authority
JP
Japan
Prior art keywords
slot
rotor
squirrel
outer circumferential
aluminum die
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.)
Pending
Application number
JP3322489A
Other languages
Japanese (ja)
Inventor
Hiroaki Kojima
浩明 小島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP3322489A priority Critical patent/JPH02214449A/en
Publication of JPH02214449A publication Critical patent/JPH02214449A/en
Pending legal-status Critical Current

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  • Induction Machinery (AREA)

Abstract

PURPOSE:To ensure an air gap accurately between a rotor and a stator with low cost by forming a flank, being cut radially inward, at the outer circumferential section of a slot in a steel board. CONSTITUTION:A plurality of slots 2 are formed in a steel board 1, and an arched flank 3, being cut radially inward, is formed at the outer circumferential side of each slot 2. Then the steel boards 1 are laminated integrally and subjected to aluminum die-cast. Although the outer circumferential side of the slot 2 inflates radially outward due to the pressure being applied in the slot, the flank section 3 inflates radially outward to provide a uniform overall outer circumferential face of the steel board 1. By such arrangement, a uniform air gap can be ensured accurately between the rotor and the stator.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、圧縮機などに使用されるかご形電動機におけ
る回転子の製造方法に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a rotor in a squirrel cage electric motor used in a compressor or the like.

(従来の技術) 従来、この種かご形電動機の回転子は、例えは実開昭5
9−128551号公報に記載され、がっ、第4図に示
したごとく、外周部に複数のスロット (S)をもった
鋼板(B)の多数枚を積層して、アルミダイカスト処理
を施すことにより、前記スロット(S)の内部にアルミ
から成るがごル導体(C)を形成するようにしている。
(Prior art) Conventionally, the rotor of this type of squirrel cage motor was
As described in Publication No. 9-128551 and shown in Fig. 4, a large number of steel plates (B) having a plurality of slots (S) on the outer periphery are laminated and aluminum die-casting is performed. Accordingly, an aluminum conductor (C) is formed inside the slot (S).

(発明が解決しようとする課題) 所で、前記スロット (S)の内部にかごル導体(C)
を形成すべく、アルミダイカスト処Ha 11すとき、
前記スロット(S)の内部に大きな圧ブ(通常250ト
う程度の射出圧力)が付与されSことから、強度的に弱
い前記スロット (S)の外周部側が径方向外方に膨出
し、つまり、同図のhalls(イ)で示す状態から実
線(ロ)の状態へと審出され、これに伴い前記鋼板(B
)におけるスロット(S)の対向外周側が、同じく点線
(ハ)の状態から実線(ニ)の状態へと局部的に膨出さ
れて、円弧形状の突出部(A)が形成される。
(Problem to be Solved by the Invention) Now, a cage conductor (C) is placed inside the slot (S).
In order to form the aluminum die-casting process Ha 11,
Since a large pressure (usually about 250 tons of injection pressure) is applied inside the slot (S), the outer peripheral side of the slot (S), which is weak in strength, bulges outward in the radial direction. , the state shown by the halls (a) in the same figure changes to the state shown by the solid line (b), and accordingly, the steel plate (B)
The opposite outer peripheral side of the slot (S) in ) is similarly bulged locally from the state shown by the dotted line (C) to the state shown by the solid line (D), thereby forming an arc-shaped protrusion (A).

従って、以上のように形成した回転子(RT)を固定子
(ST)内に組込んだとき、これら回転子(RT)と固
定子(ST)との間に形成される本来のエアギャップ(
G1)に対し、前記突出部(A)の部分でのエアギャッ
プ(G2)が小となって、前記回転子(RT)と固定子
(ST)との間に、正確なエアギャップを確保できない
問題があった。
Therefore, when the rotor (RT) formed as described above is assembled into the stator (ST), the original air gap (
In contrast to G1), the air gap (G2) at the protrusion (A) is small, making it impossible to ensure an accurate air gap between the rotor (RT) and stator (ST). There was a problem.

以上の問題を解決するためには、アルミダイカスト処理
を行った後に、首記鋼板(B)の外周側に形成される前
記突出部(A)を切削加工することが考えられるが、斯
くするときには、加工工数が増大してコストアップとな
るのである。
In order to solve the above problem, it is conceivable to cut the protrusion (A) formed on the outer circumferential side of the steel plate (B) after aluminum die-casting. , the number of processing steps increases, leading to an increase in costs.

本発明は以上のような問題に鑑みてなしたもので、その
目的は、安価なコストで正確なエアギャップを確保する
ことができるかご形電動機における回転子の製造方法を
提供することにある。
The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a method for manufacturing a rotor in a squirrel cage electric motor that can ensure an accurate air gap at low cost.

(課題を解決するための手段) 上記目的を達成するために、本発明では、外周部に複数
のスロット(2)をもつ積層鋼板(1)を備え、アルミ
ダイカスト処理により、前記スロット(2)の内部にか
ご形導体(6)を形成するようにしたかご形電動機にお
ける回転子の製造方法において、前記鋼板(1)におけ
る前記スロット(2)の対向側外周部に、径方向内方に
欠落する逃がし部(3)を予め形成しておき、その後前
記アルミダイカスト処理を行うようにしたことを特徴と
するものである。
(Means for Solving the Problems) In order to achieve the above object, the present invention includes a laminated steel plate (1) having a plurality of slots (2) on the outer periphery, and the slots (2) are formed by aluminum die-casting. In the method for manufacturing a rotor for a squirrel-cage electric motor in which a squirrel-cage conductor (6) is formed inside the steel plate (1), the steel plate (1) is provided with a cutout radially inward on the outer circumference of the steel plate (1) on the side opposite to the slot (2). A relief portion (3) is formed in advance, and then the aluminum die-casting process is performed.

(作用) 前記鋼板(1)のスロット(2)との対向外周側に、前
記逃がし部(3)を予め形成しておくことにより、アル
ミダイカスト処理を行うとき、前記スロット(2)内に
付与される圧力で前記逃がし部(3)が径方向外方に膨
出されて、前記鋼板(1)の外周面全体がは〈均一とな
り、回転子と固定子との間に正確なエアギャップが確保
されるのである。
(Function) By forming the relief portion (3) in advance on the outer circumferential side of the steel plate (1) opposite to the slot (2), when aluminum die-casting is performed, the relief portion (3) is formed in the slot (2). The relief portion (3) is bulged radially outward by the pressure applied, and the entire outer peripheral surface of the steel plate (1) becomes uniform, creating an accurate air gap between the rotor and the stator. It is guaranteed.

(実施例) 以下本発明にかかるかご形電動機における回転子の製造
方法を図面の実施例によって説明する。
(Example) Hereinafter, a method for manufacturing a rotor in a squirrel cage electric motor according to the present invention will be explained with reference to examples shown in the drawings.

先ず、第1図に示したように、積層鋼板(1)の打ち抜
き成形時に、該鋼板(1)の外周部に複数のスロット(
2)を所定間隔を置いて形成すると同時に、これら各ス
ロット(2)の対向外周側に、それぞれ径方向内方側に
欠落する円弧形杖の逃がし部(3)を形成する。この逃
がし部(3)は、後述するアルミダイカスト処理時に、
前記スロット(2)の内部が径方向外方に膨出するとき
の膨出範囲に相当するように径方向内方側に欠落させる
のである。
First, as shown in FIG. 1, when a laminated steel plate (1) is punched and formed, a plurality of slots (
2) are formed at predetermined intervals, and at the same time, arc-shaped cane relief portions (3) are formed on the opposing outer periphery sides of each of these slots (2), respectively, and are notched inward in the radial direction. This relief part (3) is used during the aluminum die-casting process described later.
The slot (2) is cut out radially inward so as to correspond to the bulging range when the inside of the slot (2) bulges radially outward.

次に、第2図に示したように、前記鋼板(1)の多数枚
を、前記各スロット(2)を対向させた状態で積層一体
化する。同図においては、前記各鋼板(1)に複数の切
起し突起(4)と、この突起(4)の切起しによって形
成される複数の係合孔(5)とを設け、これら各突起(
4)と各保合孔(5)とを隣接する鋼板(1)間で互い
に保合することにより、各鋼板(1)を積層一体化する
ようにしている。
Next, as shown in FIG. 2, a large number of the steel plates (1) are laminated and integrated with the slots (2) facing each other. In the figure, each steel plate (1) is provided with a plurality of cut and raised projections (4) and a plurality of engagement holes (5) formed by the cut and raised projections (4), and each of these protrusion(
4) and each retaining hole (5) are mutually secured between adjacent steel plates (1), so that the respective steel plates (1) are laminated and integrated.

そして、以上のように積層一体化された各鋼板(1)を
アルミダイカスト処理して、第3図に示したように、前
記各スロット(2)の内部に、アルミから成るかご形導
体(6)を形成して、かご形電転子(RT)を製作する
Then, each of the steel plates (1) laminated and integrated as described above is subjected to an aluminum die-casting process, and as shown in FIG. ) to produce a squirrel cage trochanter (RT).

以上のようなアルミダイカスト処理を行うときには、前
記スロット(2)の内部に大きな圧力が付与されること
から、強度的に弱い前記スロット(2)の外周部側が径
方向外方に膨出され、即ち、同図の点線(ホ)で示す状
態から実線(ニ)の状態へと膨出されるのであるが、前
記鋼板(1)におけるスロット(2)の対向外周側には
、前記膨出範囲に相当する逃がし部(3)が予め形成さ
れていることから、前記アルミダイカスト処理に伴い前
記鋼板(1)の外周側かは糧面−状に均一化されるので
ある。
When performing the aluminum die casting process as described above, a large pressure is applied to the inside of the slot (2), so the outer peripheral side of the slot (2), which is weak in strength, bulges outward in the radial direction. That is, the steel plate (1) is bulged from the state shown by the dotted line (E) to the state shown by the solid line (D), but there is a bulge in the bulge area on the outer peripheral side opposite to the slot (2) in the steel plate (1). Since the corresponding relief part (3) is formed in advance, the outer circumferential side of the steel plate (1) is made uniform in surface shape by the aluminum die-casting process.

従って、以上のように製作した回転子(RT)を固定子
(ST)内に組込むとき、これら回転子(RT)と固定
子(ST)との間に、全体均一とされた正確なエアギャ
ップ(G)が確保されるのである。また、かご形電動機
においては、前記かご形導体(6)の外周側位置、つま
り前記スロット(2)がアルミダイカスト処理により膨
出された前記(ニ)位置と、前記固定子(ST)の内周
面との距fl (N)が、電動機の特性に大きな影響を
与えるのであるが、前記距離(N)は、第4図に示した
従来の距離(N1)と殆ど変わらないことから、電動機
の特性に悪影響を与えることはないのである。
Therefore, when the rotor (RT) manufactured as described above is assembled into the stator (ST), an accurate air gap that is uniform throughout is created between the rotor (RT) and the stator (ST). (G) is secured. In the squirrel cage electric motor, the outer peripheral side position of the squirrel cage conductor (6), that is, the position (d) where the slot (2) is bulged out by aluminum die-casting, and the inner position of the stator (ST). The distance fl (N) from the circumferential surface has a great influence on the characteristics of the electric motor, but since the distance (N) is almost the same as the conventional distance (N1) shown in Fig. 4, the electric motor It does not have any negative effect on the characteristics of.

(発明の効果) 以上説明したように、本発明にかかる回転子の製造方法
では、積層鋼板(1)におけるスロット(2)の対向側
外周部に、径方向内方に欠落する逃がし部(3)を予め
形成しておき、その後アルミダイカスト処理を行うよう
にしたから、安価なコストでもって、正確なエアギャッ
プを確保できるに至ったのである。
(Effects of the Invention) As explained above, in the rotor manufacturing method according to the present invention, the relief portion (3 ) was formed in advance and then aluminum die-casting was performed, making it possible to ensure an accurate air gap at a low cost.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図乃至第3図は本発明にかかる回転子の製造工程を
示す図面、第4図は従来例を示す図面である。 (1)・・・・−積層鋼板 (2)・・番・・スロット (3)・拳・・・逃がし部 (6)・・・・−かご形導体
1 to 3 are drawings showing the manufacturing process of a rotor according to the present invention, and FIG. 4 is a drawing showing a conventional example. (1)・・・Laminated steel plate (2)・・・Slot (3)・Fist・Escape part (6)・・・・Squirrel cage conductor

Claims (1)

【特許請求の範囲】[Claims] 1)外周部に複数のスロット(2)をもつ積層鋼板(1
)を備え、アルミダイカスト処理により、前記スロット
(2)の内部にかご形導体(6)を形成するようにした
かご形電動機における回転子の製造方法であって、前記
鋼板(1)における前記スロット(2)の対向側外周部
に、径方向内方に欠落する逃がし部(3)を予め形成し
ておき、その後前記アルミダイカスト処理を行うように
したことを特徴とするかご形電動機における回転子の製
造方法。
1) Laminated steel plate (1) with multiple slots (2) on the outer periphery
), a method for manufacturing a rotor in a squirrel-cage electric motor, wherein a squirrel-cage conductor (6) is formed inside the slot (2) by aluminum die-casting, the slot in the steel plate (1) A rotor in a squirrel cage electric motor characterized in that a relief portion (3) that is missing radially inward is formed in advance on the outer peripheral portion of the opposite side of (2), and then the aluminum die-casting process is performed. manufacturing method.
JP3322489A 1989-02-13 1989-02-13 Manufacture of rotor for squirrel-cage motor Pending JPH02214449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3322489A JPH02214449A (en) 1989-02-13 1989-02-13 Manufacture of rotor for squirrel-cage motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3322489A JPH02214449A (en) 1989-02-13 1989-02-13 Manufacture of rotor for squirrel-cage motor

Publications (1)

Publication Number Publication Date
JPH02214449A true JPH02214449A (en) 1990-08-27

Family

ID=12380481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3322489A Pending JPH02214449A (en) 1989-02-13 1989-02-13 Manufacture of rotor for squirrel-cage motor

Country Status (1)

Country Link
JP (1) JPH02214449A (en)

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