JPS6143943B2 - - Google Patents
Info
- Publication number
- JPS6143943B2 JPS6143943B2 JP15520580A JP15520580A JPS6143943B2 JP S6143943 B2 JPS6143943 B2 JP S6143943B2 JP 15520580 A JP15520580 A JP 15520580A JP 15520580 A JP15520580 A JP 15520580A JP S6143943 B2 JPS6143943 B2 JP S6143943B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- riser
- welded
- coil conductor
- temperature
- 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
- 238000003466 welding Methods 0.000 claims description 34
- 239000004020 conductor Substances 0.000 claims description 18
- 239000010445 mica Substances 0.000 claims description 17
- 229910052618 mica group Inorganic materials 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000567 combustion gas Substances 0.000 description 6
- 239000011324 bead Substances 0.000 description 5
- 238000007872 degassing Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/04—Connections between commutator segments and windings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Current Collectors (AREA)
Description
【発明の詳細な説明】
本発明は整流子ライザとコイル導体の接続方法
に係り、特に車両電動機等の整流子ライザとコイ
ル導体の接続に好適なTIG溶接による接続方法に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for connecting a commutator riser and a coil conductor, and more particularly to a method for connecting a commutator riser and a coil conductor in a vehicle electric motor using TIG welding.
車両用電動機等の様な回転電機の整流子１は、
第１図および第２図に示す様に、整流子片２とマ
イカ片３を周方向に交互に配置し、これらの両端
を締付環４およびＶリング５で締付けることによ
つて構成され、そのライザ６の溝部７には電機子
巻線から引出されたコイル導体８が挿入，接続さ
れている。 A commutator 1 of a rotating electric machine such as a vehicle electric motor, etc.
As shown in FIGS. 1 and 2, it is constructed by arranging commutator pieces 2 and mica pieces 3 alternately in the circumferential direction, and tightening both ends of these pieces with a tightening ring 4 and a V ring 5, A coil conductor 8 drawn out from the armature winding is inserted and connected to the groove 7 of the riser 6.
ところで、前記ライザ６とコイル導体８を接続
する場合、従来は第３図および第４図に示す様
に、TIG溶接法を採用して、ライザ６とコイル導
体８の接続すべき位置にトーチ９を近付け、ノズ
ル１０より突出したタングステン電極１１とライ
ザ６間でアーク１２を発生させるとともに、タン
グステン電極の酸化を防ぎかつアークを安定させ
るために、シールドガス１３をノズル１０から噴
出して、大気よりタングステン電極とアークをシ
ールドしている。この様にすると、アーク１２に
より加熱されたライザ６は、高温で溶融し、溶融
プール１４が出来た後、アーク１２を消去すれ
ば、スポツト状のビードが完成し、ライザ６とコ
イル導体８は溶接されて一体に接続される。 By the way, when connecting the riser 6 and the coil conductor 8, conventionally, as shown in FIGS. 3 and 4, a TIG welding method is adopted, and a torch 9 is attached to the position where the riser 6 and the coil conductor 8 are to be connected. to generate an arc 12 between the tungsten electrode 11 protruding from the nozzle 10 and the riser 6, and in order to prevent oxidation of the tungsten electrode and stabilize the arc, shielding gas 13 is ejected from the nozzle 10 to remove air from the atmosphere. Shields the tungsten electrode and arc. In this way, the riser 6 heated by the arc 12 melts at a high temperature and a molten pool 14 is formed. When the arc 12 is extinguished, a spot-shaped bead is completed, and the riser 6 and the coil conductor 8 are Welded and connected together.
しかし、この様な従来のTIG溶接による接続方
法では、溶接時のアーク１２による熱で溶接部近
傍のマイカ片が加熱されて燃焼ガス１５が発生す
る。すなわち、マイカ片３はマイカ薄片をバイン
ダで貼り合せたものであるが、350℃を越える
と、このバインダが急激に気化し、燃焼ガス１５
となつて第４図に示すように表面開放部より大気
中に放出されるため、このガス１５がシールドガ
ス１３中に混入して乱流が生じ、これが溶融プー
ル１４内に拡散して、溶接ビード内にまき込まれ
気泡、いわゆるブローホールとなつてしまう。そ
して、溶接ビード内にこの様なブローホールが多
く存在すると、接続部の機械的強度が低下する。
特に通電時の熱応力、回転時の遠心力、車輪やレ
ールの振動等に対応する強度が著しく低下する。
また、ブローホースより接続部の電気抵抗が増加
して、局部的な温度上昇を発生する。この接続部
は、電流が常に過大密度の状態で流れるため、電
気抵抗の増加は大きな問題で、回転子全体の温度
上昇にもつながる。 However, in such a conventional connection method using TIG welding, the mica pieces near the weld are heated by the heat generated by the arc 12 during welding, and combustion gas 15 is generated. That is, the mica piece 3 is made by bonding mica flakes with a binder, but when the temperature exceeds 350°C, this binder rapidly vaporizes and the combustion gas 15
As shown in FIG. 4, this gas 15 is released into the atmosphere from the open surface, so this gas 15 mixes into the shielding gas 13, creating a turbulent flow, which diffuses into the molten pool 14 and welding. Air bubbles are trapped inside the bead and become so-called blowholes. If many such blowholes exist within the weld bead, the mechanical strength of the joint will decrease.
In particular, the strength against thermal stress during energization, centrifugal force during rotation, vibration of wheels and rails, etc. is significantly reduced.
Moreover, the electrical resistance of the connection part increases from the blow hose, causing a local temperature rise. Because current always flows through these connections in an excessively dense state, an increase in electrical resistance is a major problem and also leads to an increase in the temperature of the entire rotor.
本発明の目的は、上記した従来技術の欠点をな
くし、ブローホールの少ない溶接部を得ることの
できる整流子ライザとコイル導体の接続方法を提
供するにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a method for connecting a commutator riser and a coil conductor, which eliminates the drawbacks of the prior art described above and allows a welded portion with fewer blowholes to be obtained.
この目的を達成するため、本発明は、溶接進行
方向に並置された２つの極を用い、ライダとコイ
ル導体の互に溶接すべき部分を、前方に位置する
電極によるTIGアークにより溶接温度より低い温
度、例えば650〜700℃に加熱し、この加熱された
部分からの熱伝達により隣接マイカ片の温度をガ
ス抜き温度350℃以上、例えば400〜500℃まで高
めてガス抜きを行ない、その後、後方に位置する
電極によるTIGアークにより溶接すべき部分を溶
接温度、例えば1100〜1300℃まで加熱し、この部
分を溶融してスポツト溶接することにより、ライ
ザとコイル導体を接続することを特徴とする。 To achieve this objective, the present invention uses two poles juxtaposed in the welding direction, and the parts of the rider and coil conductor to be welded to each other are heated at a temperature lower than the welding temperature by means of a TIG arc by an electrode located in front. The temperature of the adjacent mica pieces is increased to 350°C or higher, e.g. 400 to 500°C, through heat transfer from the heated part, and degassing is performed. The riser and the coil conductor are connected by heating the part to be welded to a welding temperature, e.g., 1100 to 1300°C, by means of a TIG arc using an electrode located at the position, melting this part, and performing spot welding.
以下、本発明の一実施例を図面について詳細に
説明する。 Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
この実施例では、第５図および第６図に示す様
に、複合トーチにおける２つのノズル１０Ａ，１
０Ｂから突出する各タングステン電極１１Ａ，１
１Ｂを互に隣接するライザ６上に配置し、溶接進
行方向の前方に位置する先行電極１１Ａのアーク
１２により溶接すべきライザ６およびコイル導体
８部分を溶接温度より低い温度、例えば650〜700
℃に加熱し、この加熱された部分からの熱伝達に
より、これに隣接するマイカ片３の温度をガス抜
き温度350℃以上、例えば400〜500℃まで高めて
マイカ片３のガス抜きを行なうと同時に、溶接の
ための予熱を行なう。一方、後方に位置する後方
電極１１Ｂのアークにより、先行電極１１Ａのア
ーク１２によつて既にマイカ片３のガス抜きと予
熱が行なわれている溶接すべき部分をさらに高温
の溶接温度、例えば1100〜1300℃まで加熱して、
ライザ６を溶融し、スポツト状の溶接ビード１６
を形成してライザ６とコイル導体８を接続する。
この様な先行電極１１Ａによるガス抜きおよび予
熱と、後行電極１１Ｂによるスポツト溶接を、整
流子１をライザ６の１ピツチずつ移動して順次行
ない、１周分の溶接が完了したら、さらにトーチ
を半径方向に所定距離移動して次の１周分の溶接
を行ない、これを半径方向の溶接すべき全ての部
分について行なう。すなわち、１つの溶接すべき
部分についてみれば、まず先行電極１１Ａによつ
てマイカ片３のガス抜きと予熱を行ない、その
後、このガス抜きと予熱が行なわれたライザ６を
１ピツチ移動して後行電極１１Ｂに対向させ、こ
こで本溶接を行なう。 In this embodiment, as shown in FIGS. 5 and 6, two nozzles 10A and 1 in the composite torch
Each tungsten electrode 11A, 1 protruding from 0B
1B are placed on mutually adjacent risers 6, and the portions of the riser 6 and coil conductor 8 to be welded are heated to a temperature lower than the welding temperature, e.g.
℃, and by heat transfer from this heated part, the temperature of the mica piece 3 adjacent to it is raised to a degassing temperature of 350°C or higher, for example, 400 to 500°C, and the mica piece 3 is degassed. At the same time, preheating for welding is performed. On the other hand, the arc of the rear electrode 11B located at the rear moves the part to be welded, where the mica piece 3 has already been degassed and preheated by the arc 12 of the preceding electrode 11A, to a higher welding temperature, e.g. Heat up to 1300℃,
The riser 6 is melted to form a spot-shaped weld bead 16.
to connect the riser 6 and the coil conductor 8.
The degassing and preheating by the leading electrode 11A and the spot welding by the trailing electrode 11B are performed sequentially by moving the commutator 1 one pitch at a time on the riser 6, and when welding for one round is completed, the torch is further turned on. It moves a predetermined distance in the radial direction and performs welding for the next round, and this is performed for all the parts to be welded in the radial direction. That is, regarding one part to be welded, first, the mica piece 3 is degassed and preheated by the leading electrode 11A, and then the riser 6, which has been degassed and preheated, is moved one pitch. The main welding is performed here to face the row electrode 11B.
なお、前述の如く先行電極１１Ａによるマイカ
片のガス抜きおよび予熱と後行電極１１Ｂによる
本溶接を行なう場合、両電極１１Ａ，１１Ｂから
同時にアークを発生させると、両アーク間に干渉
が起こるので、一方の電極がアークを発生してい
るときには、他方の電極でアークが発生しない様
に、第７図ａ，ｂに示す如き常に互に半波ずれた
波形の電流ＩA，ＩBを両電極１１Ａ，１１Ｂに流
すことが望ましい。 As mentioned above, when degassing and preheating the mica pieces using the leading electrode 11A and performing main welding using the trailing electrode 11B, if arcs are generated from both electrodes 11A and 11B at the same time, interference will occur between the two arcs. When one electrode is generating an arc, currents I A and I B with waveforms that are shifted by half a wave from each other as shown in Figure 7a and b are always applied to both electrodes so that the other electrode does not generate an arc. It is desirable to flow it to 11A and 11B.
第８図はこの様は互に半波ずれた波形の電流Ｉ
A，ＩBを両電極１１１Ａ，１１Ｂに流すための溶
接装置の一例を示す。第８図において、１７は溶
接電源、１８はパルス制御回路、１９はパルス制
御回路１８からの制御パルスによつて交互にオ
ン，オフ制御される２つのトランジスタ２０，２
１を備えたスイツチング回路である。 Figure 8 shows current I with waveforms shifted by half a wave.
An example of a welding device for flowing A and I B to both electrodes 111A and 11B is shown. In FIG. 8, 17 is a welding power source, 18 is a pulse control circuit, and 19 is two transistors 20 and 2 which are controlled to be turned on and off alternately by control pulses from the pulse control circuit 18.
This is a switching circuit equipped with 1.
また、トーチ９の構造は第９図に示す様に、両
電極１１Ａ，１１Ｂを隣接するライザ６の真上に
配置できる構造で、そのノズル部はアークの熱で
高温に加熱されるため、銅、鉄、ステンレス鋼等
で作り、かつ表面に水冷却パイプ等を取付けて冷
却しながら使用できるようにするのがよい。な
お、ライザ６と電極１１Ａ，１１Ｂとの間の間隔
は、適切なアークを発生させるために、両電極１
１Ａ，１１Ｂ間の間隔よりも小さく設定すること
が必要である。 The structure of the torch 9, as shown in FIG. It is best to make it from iron, stainless steel, etc., and attach a water cooling pipe or the like to the surface so that it can be used while being cooled. Note that the spacing between the riser 6 and the electrodes 11A, 11B is such that both electrodes 1
It is necessary to set the interval smaller than the interval between 1A and 11B.
本実施例によれば、先行電極１１Ａによつて予
めマイカ片３のガス抜きを行なうため、その後の
本溶接の際にマイカ片３から燃焼ガス１５が発生
することがなく、この燃焼ガス１５に起因するブ
ローホールの発生を防いで、ブローホールの少な
い良好な溶接部を得ることができる。その結果、
ライザ６とコイル導体８の接続部における機械的
強度を著しく向上し、かつこの接続部における電
気抵抗を低減し、この部分での発熱を低く押えて
回転子の温度上昇を防ぐことができる。また、先
行電極１１Ａのアークによつて高温予熱が可能と
なるため、溶接速度を速めることができ、その結
果、整流子片の軟化および熱変形を防ぎ、かつ作
業効率を向上することができる。 According to this embodiment, since the mica piece 3 is degassed in advance by the preceding electrode 11A, the combustion gas 15 is not generated from the mica piece 3 during the subsequent main welding, and the combustion gas 15 is It is possible to prevent the occurrence of blowholes and obtain a good welded part with fewer blowholes. the result,
The mechanical strength at the connection between the riser 6 and the coil conductor 8 can be significantly improved, the electrical resistance at this connection can be reduced, and heat generation at this connection can be suppressed to a low level, thereby preventing a rise in temperature of the rotor. Further, since high temperature preheating is possible by the arc of the leading electrode 11A, the welding speed can be increased, and as a result, softening and thermal deformation of the commutator pieces can be prevented and work efficiency can be improved.
以上説明した様に、本発明によれば、溶接進行
方向に並置された２つの電極を用い、ライザとコ
イル導体の互に溶接すべき部分を、前方に位置す
る電極によるTIGアークにより溶接温度より低い
温度に加熱して、この溶接すべき部分に隣接する
マイカ片のガス抜きを行なつた後、後方に位置す
る電極によるTIGアークにより溶接すべき部分を
さらに高温の溶接温度まで加熱してスポツト溶接
するので、溶接の際にマイカ片から燃焼ガスが発
生することがなく、この燃焼ガスに起因するブロ
ーホールの発生を防いで、ブローホールの少ない
良好な溶接部を得ることができ、その結果、ライ
ザとコイル導体の接続部における機械的強度を著
しく向上し、かつこの接続部における電気抵抗を
低減し、この部分での発熱を低く押えて回転子の
温度上昇を防止することができる。 As explained above, according to the present invention, two electrodes arranged in parallel in the welding progress direction are used to weld the portions of the riser and the coil conductor that are to be welded together at a temperature lower than the welding temperature by the TIG arc from the electrode located in front. After heating to a low temperature to degas the mica pieces adjacent to the part to be welded, the part to be welded is further heated to a high welding temperature by a TIG arc using an electrode located at the rear to spot. Since it is welded, no combustion gas is generated from the mica pieces during welding, and blowholes caused by this combustion gas are prevented, resulting in a good welded area with few blowholes. , it is possible to significantly improve the mechanical strength of the connection between the riser and the coil conductor, reduce the electrical resistance at this connection, keep heat generation at this portion low, and prevent the temperature of the rotor from rising.
第１図は本発明の接続方法が適用される整流子
部分の縦断面図、第２図は第１図のＰ矢視図、第
３図は従来の１電極によるTIGスポツト溶接法を
用いた接続方法を示す側面図、第４図は第３図の
Ｑ矢視図、第５図は本発明の一実施例に係る２電
極によるTIGスポツト溶接法を用いた接続方法を
示す側面図、第６図は第５図のＲ矢視図、第７図
ａ，ｂは両電極に流す電流の波形図、第８図は本
発明の接続方法を実施するための溶接装置の一例
を示すブロツク図、第９図は本発明の接続方法で
使用する２電極スポツトTIG溶接トーチの具体例
を示す拡大図である。
１……整流子、２……整流子片、３……マイカ
片、６……ライザ、８……コイル導体、１１Ａ…
…先行電極、１１Ｂ……後行電極、１６……溶接
ビード。
Fig. 1 is a vertical cross-sectional view of a commutator portion to which the connection method of the present invention is applied, Fig. 2 is a view taken in the direction of arrow P in Fig. 1, and Fig. 3 is a cross-sectional view of a commutator section to which the connection method of the present invention is applied. 4 is a side view showing the connection method, FIG. 4 is a view taken in the direction of arrow Q in FIG. 3, and FIG. Figure 6 is a view taken in the direction of arrow R in Figure 5, Figures 7a and b are waveform diagrams of the current flowing through both electrodes, and Figure 8 is a block diagram showing an example of a welding device for carrying out the connection method of the present invention. 9 is an enlarged view showing a specific example of a two-electrode spot TIG welding torch used in the connection method of the present invention. 1... Commutator, 2... Commutator piece, 3... Mica piece, 6... Riser, 8... Coil conductor, 11A...
... Leading electrode, 11B... Trailing electrode, 16... Welding bead.
Claims (1)
して構成された整流子のライザとコイル導体を
TIG溶接によつて接続するものにおいて、溶接進
行方向に並置された２つの電極を用い、前記ライ
ザとコイル導体の互に溶接すべき部分を、溶接進
行方向の前方に配置する電極によるTIGアークに
より溶接温度より低い温度に加熱して、この溶接
すべき部分に隣接するマイカ片のガス抜きを行な
つた後、後方に位置する電極によるTIGアークに
より前記溶接すべき部分をさらに高温の溶接温度
まで加熱してスポツト溶接することを特徴とする
整流子ライザとコイル導体の接続方法。1. The riser and coil conductor of a commutator are constructed by alternately arranging commutator pieces and mica pieces in the circumferential direction.
In those that are connected by TIG welding, two electrodes are placed side by side in the welding direction, and the portions of the riser and the coil conductor to be welded are connected by TIG arc using the electrodes placed forward in the welding direction. After heating to a temperature lower than the welding temperature to degas the mica pieces adjacent to the part to be welded, the part to be welded is heated to an even higher welding temperature by a TIG arc from an electrode located at the rear. A method for connecting a commutator riser and a coil conductor, characterized by heating and spot welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15520580A JPS5780245A (en) | 1980-11-06 | 1980-11-06 | Connecting method for commutator riser and coil conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15520580A JPS5780245A (en) | 1980-11-06 | 1980-11-06 | Connecting method for commutator riser and coil conductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5780245A JPS5780245A (en) | 1982-05-19 |
| JPS6143943B2 true JPS6143943B2 (en) | 1986-09-30 |
Family
ID=15600793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15520580A Granted JPS5780245A (en) | 1980-11-06 | 1980-11-06 | Connecting method for commutator riser and coil conductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5780245A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02503817A (en) * | 1988-02-22 | 1990-11-08 | ライアン，トーマス，ウィリアムス，ザ サード | Variable compression ratio direct injection engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3859873A1 (en) | 2016-10-04 | 2021-08-04 | Kabushiki Kaisha Toshiba | Pressure relief case |
-
1980
- 1980-11-06 JP JP15520580A patent/JPS5780245A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02503817A (en) * | 1988-02-22 | 1990-11-08 | ライアン，トーマス，ウィリアムス，ザ サード | Variable compression ratio direct injection engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5780245A (en) | 1982-05-19 |
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