JPS60240371A - Method of welding turbo-rotor shaft - Google Patents
Method of welding turbo-rotor shaftInfo
- Publication number
- JPS60240371A JPS60240371A JP9720884A JP9720884A JPS60240371A JP S60240371 A JPS60240371 A JP S60240371A JP 9720884 A JP9720884 A JP 9720884A JP 9720884 A JP9720884 A JP 9720884A JP S60240371 A JPS60240371 A JP S60240371A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- lower electrode
- welding
- turbine
- rotor
- 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
Links
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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/3009—Pressure electrodes
Abstract
Description
【発明の詳細な説明】
〔発明の対象〕
本発明は自動車エンジンに装着され、超高速回転にて作
動する、耐熱合金にて製造したタービン・ロータとター
ビン軸との溶接方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] The present invention relates to a method for welding a turbine rotor manufactured from a heat-resistant alloy and a turbine shaft, which is installed in an automobile engine and operates at ultra-high speed rotation.
本発明に係る従来技術としては、特願昭５８−２２５６
７号「ターボ・ロータ軸の溶接方法」の明細書に、第１
〜第３図に示すように、耐熱鋼よりなるタービン°軸４
と、耐熱合金よりな）るタービンロータ１とを溶接部３
にて溶接する場合にユタービン軸４の溶接面４ａに傾斜
角を有するリング形状の凸部を４ｂとし、タービンロー
タ１のｉ接面である平面１ａとを接合して、タービン軸
４とタービンロータｌとを加圧しながらコンデンサー式
抵抗溶接にて溶接する旨記載されている。As a prior art related to the present invention, Japanese Patent Application No. 58-2256
In the specification of No. 7 "Turbo rotor shaft welding method", No. 1
~As shown in Figure 3, the turbine shaft 4 is made of heat-resistant steel.
and a turbine rotor 1 made of a heat-resistant alloy at a welded part 3.
In the case of welding, a ring-shaped convex part 4b having an inclination angle is formed on the welding surface 4a of the turbine shaft 4, and the flat surface 1a which is the i-tangential surface of the turbine rotor 1 is joined. It is stated that welding is performed by condenser resistance welding while pressurizing the parts.
〔従来技術の問題点及びその技術的分析〕この従来のタ
ービン軸とタービンロータとの溶接方法においては、タ
ービンロータは複雑形状なゝ羽根部１１ａ、ｌｌｂ、−
・−及び軸部１ａ、１ｂよりなり、軸部１ｂが円筒形状
の下電極の内面６ｃに接触して通電することになるが、
溶接時に電流７が軸部１ｂを流れる場合に、軸部１ｂの
軸径が小さく、従って面積が少ないためにこの部分も異
常に発熱することになる。このため、軸１ｂにおいて通
電面積を多くする必要があるが、タービンロータの周辺
部は複雑形状の羽根１１ａ、１１ｂで形成されているた
めに、下電極６と羽根１１とを確実に接触させても、通
電面積７を大きくすることはできないという問題点があ
る。[Problems with the prior art and technical analysis thereof] In this conventional welding method for welding the turbine shaft and the turbine rotor, the turbine rotor has complex-shaped blade portions 11a, llb, -
・- and shaft portions 1a and 1b, and the shaft portion 1b contacts the inner surface 6c of the cylindrical lower electrode to conduct electricity,
When the current 7 flows through the shaft portion 1b during welding, this portion also generates abnormal heat because the shaft diameter of the shaft portion 1b is small and therefore the area is small. For this reason, it is necessary to increase the current-carrying area in the shaft 1b, but since the peripheral part of the turbine rotor is formed of complex-shaped blades 11a and 11b, it is necessary to ensure that the lower electrode 6 and the blades 11 are in contact with each other. However, there is a problem in that the current-carrying area 7 cannot be increased.
そこで、本発明は複雑形状な羽根を有するタービンロー
タと、下電極との間に通電面積を充分に確保して抵抗溶
接することを、その技術的課題とするものである。Therefore, the technical object of the present invention is to perform resistance welding while ensuring a sufficient current-carrying area between a turbine rotor having blades having a complicated shape and a lower electrode.
上記技術的課題を解決するために講じた技術的手段は、
円筒形状の下電極内に約８０℃以下で溶融可能な低融点
合金を溶融し、その中にワークを浸漬して通電、加圧し
て抵抗発熱により、前記タービン軸のリング状プロジエ
クショーン部とタービンロータとを溶接するものである
。The technical measures taken to solve the above technical problems are:
A low melting point alloy that can be melted at about 80°C or less is melted in the cylindrical lower electrode, and the workpiece is immersed in the melt and energized and pressurized to generate resistance heat, thereby forming the ring-shaped projection part of the turbine shaft. The turbine rotor is welded to the turbine rotor.
前記の溶接方法は、円筒形状の下電極内に低融点合金と
複雑形状をした羽根を有するタービンロータを浸漬して
、導通的に一体とし、従って通電面積が非常に多くなり
、従来のような軸端部の異常な加熱は無く、タービン軸
とタービンロータとの接合部のみが電流により加熱され
、確実に溶接できるものである。In the above-mentioned welding method, a turbine rotor having a low melting point alloy and complex-shaped blades is immersed in a cylindrical lower electrode to conductively integrate the rotor, which results in a very large current-carrying area, which is different from conventional welding. There is no abnormal heating of the shaft end, and only the joint between the turbine shaft and the turbine rotor is heated by the current, allowing reliable welding.
本発明は、次の特有の効果を生じる。すなわち、（１）
タービンロータのようなワークがどんな複雑な形状でも
、円筒形状の下電極内に挿入できる形状であれば、確実
に溶接が可能である。The present invention produces the following unique effects. That is, (1)
No matter how complicated the shape of the workpiece, such as a turbine rotor, it can be reliably welded as long as it can be inserted into the cylindrical lower electrode.
（２）下電極と、ワークとの接触部が広くなるために、
従来方法のような軸部と接触するところの下電極の一部
分が摩耗するということはなく、コスト的に有利である
。(2) Because the contact area between the lower electrode and the workpiece becomes wider,
Unlike the conventional method, the part of the lower electrode that comes into contact with the shaft does not wear out, which is advantageous in terms of cost.
（３）従来構造では軸部端面が加熱により一部変形する
場合がしばしば発生したが、本構造においては、軸の変
形はまったくない。(3) In the conventional structure, the shaft end face often partially deforms due to heating, but in the present structure, the shaft does not deform at all.
（４）耐熱合金よりなるタービンロータと低融点合金は
濡れ性が悪いために低融点合金内に浸漬後、取り上げて
も、合金の４１着はまったく無く、連続生産のライン上
において実施出来るものである。(4) Turbine rotors made of heat-resistant alloys and low-melting point alloys have poor wettability, so even when they are immersed in a low-melting point alloy and then picked up, there is no 41 drop of the alloy, which can be carried out on a continuous production line. be.
以下、上記技術的手段の具体例を示す実施例について説
明する。Examples illustrating specific examples of the above technical means will be described below.
上電極側のタービン軸の溶接構造については第１図〜第
３図に示すものと同一で、下電極側については第４図〜
第６図により説明する。The welding structure of the turbine shaft on the upper electrode side is the same as that shown in Figures 1 to 3, and the welding structure of the turbine shaft on the lower electrode side is the same as that shown in Figures 4 to 3.
This will be explained with reference to FIG.
６は下電極、８は低融点合金で、はぼ８０°Ｃ以下で溶
融するもので、ビスマス（Ｂｉ）４４．２％。6 is a lower electrode, and 8 is a low melting point alloy that melts at approximately 80°C or lower, and is made of 44.2% bismuth (Bi).
鉛（Ｐｃｌ） ２４．８％、インジューム（Ｉｎ）１８
．５％、錫（Ｓｎ）１２．５％、その他よりなる合金で
ある。Lead (Pcl) 24.8%, Indium (In) 18
．． 5%, tin (Sn) 12.5%, and others.
９は加熱用電源、１０は絶縁体、１２はセラミックより
なる当板である。9 is a heating power source, 10 is an insulator, and 12 is a backing plate made of ceramic.
以−Ｆの構造において、円筒形状の下電極６内に低融点
合金８を入れ約６０〜８０℃に加熱することにより、溶
融後、タービンロータ１を浸漬せしめて、タービン軸４
の端面４ｂとタービンロータの平面１ａを接触し、上電
極５により加圧して通電する。この場合、電流７は第５
図に示すように、タービンロータ１及び低融点合金８を
通じて下電極６に通電しその範囲もＡで示す広範囲な部
分を通電することができる。In the structure shown below, the low melting point alloy 8 is placed in the cylindrical lower electrode 6 and heated to about 60 to 80°C. After melting, the turbine rotor 1 is immersed and the turbine shaft 4 is heated.
The end surface 4b of the turbine rotor is brought into contact with the flat surface 1a of the turbine rotor, and the upper electrode 5 pressurizes and energizes. In this case, the current 7 is the fifth
As shown in the figure, the lower electrode 6 can be energized through the turbine rotor 1 and the low melting point alloy 8, and can be energized over a wide range indicated by A.
第６図に示すセラミック当板１２を下電極６の中央部に
固着すれば、タービンロータ１が通電の場合加圧されて
も、タービンロータの軸１ｂには通電しないために、軸
１ｂの変形はまったく無いものである。If the ceramic backing plate 12 shown in FIG. 6 is fixed to the center of the lower electrode 6, even if the turbine rotor 1 is energized and pressurized, the shaft 1b of the turbine rotor will not be energized, resulting in deformation of the shaft 1b. is completely non-existent.
第１図はターボ・ロータ軸の完成品の斜視図であり、第
２図は本発明に係る従来方法の説明図であり、第３図は
第２図の電流の流れを示す説明図である。
第４図は本実施例の要部の断面図であり、第５図は第４
図の電流の流れを示す説明図であり、第６図は他の実施
例の説明図である。
１・・・タービンロータ、３・・・溶接部、４・・・タ
ービン軸、５・・・上電極、６・・・下電極、８・・・
低融点合金、１２・・・セラミック板
第３図
第５図
第４図
２
第６図FIG. 1 is a perspective view of a completed turbo rotor shaft, FIG. 2 is an explanatory diagram of the conventional method according to the present invention, and FIG. 3 is an explanatory diagram showing the current flow in FIG. 2. . FIG. 4 is a sectional view of the main parts of this embodiment, and FIG.
FIG. 6 is an explanatory diagram showing the flow of current in the figure, and FIG. 6 is an explanatory diagram of another embodiment. DESCRIPTION OF SYMBOLS 1... Turbine rotor, 3... Welding part, 4... Turbine shaft, 5... Upper electrode, 6... Lower electrode, 8...
Low melting point alloy, 12... Ceramic plate Figure 3 Figure 5 Figure 4 Figure 2 Figure 6
Claims (2)
を保持して、前記タービン軸とタービンロータとを溶接
するターボ・ロータ軸の溶接方法において、前記下電極
内に溶融した低融点合金を保持し、前記タービンロータ
を低融点合金内に浸漬して、通電、加圧して抵抗発熱に
より、前記タービン軸とタービンロータとを溶接する、
ターボ・ロータ軸の溶接方法。(1) In a turbo rotor shaft welding method in which the turbine shaft is held in the upper electrode and the turbine rotor is held in the lower electrode, and the turbine shaft and the turbine rotor are welded, a low melting point alloy is melted in the lower electrode. holding the turbine rotor, immersing the turbine rotor in a low melting point alloy, applying electricity and applying pressure to weld the turbine shaft and the turbine rotor by resistance heat generation;
How to weld the turbo rotor shaft.
下電極を使用して溶接する、特許請求の範囲第１項に示
す、ターボ・ロータ軸の溶接方法。(2) a ceramic plate is fixed to the center of the lower electrode;
A method of welding a turbo rotor shaft according to claim 1, which welds using a lower electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9720884A JPS60240371A (en) | 1984-05-14 | 1984-05-14 | Method of welding turbo-rotor shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9720884A JPS60240371A (en) | 1984-05-14 | 1984-05-14 | Method of welding turbo-rotor shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60240371A true JPS60240371A (en) | 1985-11-29 |
Family
ID=14186200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9720884A Pending JPS60240371A (en) | 1984-05-14 | 1984-05-14 | Method of welding turbo-rotor shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60240371A (en) |
-
1984
- 1984-05-14 JP JP9720884A patent/JPS60240371A/en active Pending
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