JPH02127986A - Structure for coupling ceramics body of rotation with metallic shaft - Google Patents
Structure for coupling ceramics body of rotation with metallic shaftInfo
- Publication number
- JPH02127986A JPH02127986A JP63278112A JP27811288A JPH02127986A JP H02127986 A JPH02127986 A JP H02127986A JP 63278112 A JP63278112 A JP 63278112A JP 27811288 A JP27811288 A JP 27811288A JP H02127986 A JPH02127986 A JP H02127986A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- metal
- metallic
- face
- sleeve
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 34
- 230000008878 coupling Effects 0.000 title abstract description 11
- 238000010168 coupling process Methods 0.000 title abstract description 11
- 238000005859 coupling reaction Methods 0.000 title abstract description 11
- 239000002184 metal Substances 0.000 claims description 80
- 229910052751 metal Inorganic materials 0.000 claims description 80
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 230000001154 acute effect Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 29
- 238000010894 electron beam technology Methods 0.000 abstract description 13
- 239000000463 material Substances 0.000 description 9
- 230000032683 aging Effects 0.000 description 6
- 239000011324 bead Substances 0.000 description 6
- 238000005219 brazing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229910001293 incoloy Inorganic materials 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004881 precipitation hardening Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000007542 hardness measurement Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910007258 Si2H4 Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〉
本発明は例えばセラミックス製ターボロータシャフトに
適用できるセラミックス製回転体と金属軸の結合構造に
関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a coupling structure between a ceramic rotating body and a metal shaft, which can be applied to, for example, a ceramic turbo rotor shaft.
〈従来の技術〉
内燃機関のターボチャージャーは排気エネルギーでター
ボロータシャフトを回し、その動力でコンプレッサーを
駆動することにより吸入空気又は混合気を予圧する装置
であり、そのタービンホイールはかなりの高熱にさらさ
れる。またターボチャージャー付エンジンの欠点として
ターボ回転の立ち上がり遅れが指摘されているが、この
タービンホイールの重量の重いことが一因とされている
０以上のことからタービンホイールを金属に比べて軽量
で耐熱性に優れ、しかも金属なみの強さを有しているセ
ラミックスで形成するのは効果的である。<Prior art> A turbocharger for an internal combustion engine is a device that uses exhaust energy to turn a turbo rotor shaft and uses that power to drive a compressor to precompress intake air or a mixture, and its turbine wheel is exposed to considerable heat. It will be done. Also, a delay in the start-up of the turbo rotation has been pointed out as a disadvantage of turbocharged engines, but this is said to be partly due to the heavy weight of the turbine wheel. It is effective to use ceramics, which have excellent properties and strength comparable to metals.
そのため第６図に示すようにセラミックス製タービンホ
イールｌの回転中心部に設けられた軸突起部２に金属ス
リーブ３を焼ばめるか、又は充填金属でロウ付けし、そ
の金属スリーブ３に別の金属で形成された金属軸４を電
子ビーム溶接で接合したセラミックス製ターボロータシ
ャフトが提案されている（特開昭６２−１１９１８０号
、同６２−７０２７５号、同６１−１５２９０２号公報
参照）。Therefore, as shown in Fig. 6, a metal sleeve 3 is shrink-fitted to the shaft protrusion 2 provided at the center of rotation of the ceramic turbine wheel l, or is brazed with filler metal, and the metal sleeve 3 is attached separately. A ceramic turbo rotor shaft has been proposed in which a metal shaft 4 made of metal is joined by electron beam welding.
金属スリーブ３の材料としては、耐熱合金、特にインコ
ロイ、インコネル等の高温強度が大きい析出硬化型合金
が使用されることが多い、これら析出硬化型合金は一旦
析出硬化しても、その合金の溶体化処理温度を超える温
度に加熱された後に空冷されると、時効処理により析出
硬化したものが再度溶体化処理されることとなり、金属
スリーブ材料の硬度及び強度が低下してしまう。As the material for the metal sleeve 3, heat-resistant alloys, especially precipitation hardening alloys with high high-temperature strength such as Incoloy and Inconel, are often used. If the metal sleeve material is air cooled after being heated to a temperature exceeding the heat treatment temperature, the precipitation hardened material due to the aging treatment will be subjected to the solution treatment again, resulting in a decrease in the hardness and strength of the metal sleeve material.
この現象は金属スリーブ３に金属軸４を電子ビーム溶接
した時の溶接接合面に現れる。金属スリーブ３にインコ
ロイ９０３を使用し金属軸部材に低合金鋼を使用した場
合の電子ビーム溶接部を第７図に示す。該図中、６は溶
接ビート部を、７は溶接熱影響部（軟化領域）を示して
いる。This phenomenon appears on the welded joint surface when the metal shaft 4 is electron beam welded to the metal sleeve 3. FIG. 7 shows an electron beam welded part when Incoloy 903 is used for the metal sleeve 3 and low alloy steel is used for the metal shaft member. In the figure, 6 indicates a weld bead, and 7 indicates a weld heat affected zone (softened region).
電子ビーム溶接部近傍の硬度測定結果を第８図に示す、
該図は、断面図で示した測定部位とビッカース硬度を示
すグラフを対応させた図である。Figure 8 shows the hardness measurement results near the electron beam welding area.
This figure is a diagram in which the measurement site shown in the cross-sectional view corresponds to a graph showing Vickers hardness.
金属スリーブ３の時効処理後のビッカース硬度は３５０
以上であるのに対して、溶接ビート部６ならびに金属ス
リーブ３の溶接熱影響部７のビッカース硬度は２００以
下に低下している。つまり領域６．７が再溶体化された
ことを示しており、その軟化領域７は軸突起部２との結
合部８（金属スリーブ３の軟化が問題となる領域１１）
まで達している。The Vickers hardness of the metal sleeve 3 after aging treatment is 350.
On the other hand, the Vickers hardness of the weld bead portion 6 and the weld heat affected zone 7 of the metal sleeve 3 has decreased to 200 or less. In other words, this shows that the region 6.7 has been re-solutionized, and the softened region 7 is the joint portion 8 with the shaft protrusion 2 (region 11 where softening of the metal sleeve 3 is a problem).
It has reached this point.
このように電子ビーム溶接の熱影響によって再溶体化さ
れ強度低下を生じる金属スリーブ３が、セラミックス製
タービンホイールｌの軸突起部２に、化学的結合を有さ
ない焼ばめ等の機械的結合で固定される場合には、軸突
起部２と金属軸４の結合強度が低下してしまうことにな
る。In this way, the metal sleeve 3, which is re-solutionized and whose strength decreases due to the thermal influence of electron beam welding, is mechanically bonded to the shaft protrusion 2 of the ceramic turbine wheel l by mechanical bonding such as shrink fit without chemical bonding. If the shaft protrusion 2 and the metal shaft 4 are fixed together, the strength of the connection between the shaft protrusion 2 and the metal shaft 4 will be reduced.
電子ビーム溶接後、再度時効処理を施せば、溶接熱影響
部７の硬度は回復するか、−殻内に時効処理には長時間
の熱処理か必要である。インコロイ９０３の場合、７８
０’Ｃ−８時間保持→６２０”Ｃ−８時間保持→空冷、
か標準的な時効処理条件である。また、電子ビーム溶接
後に、セラミックス製タービンホイールｌと金属軸４を
結合させた状態で時効処理を行なおうとすると、例えば
同一の炉を使用する場合、結合前の状態で熱処理を実施
する場合の鍾以下の数量しか処理できず、生産性が非常
に低下するという問題か生じる。If the aging treatment is performed again after electron beam welding, the hardness of the weld heat-affected zone 7 will be restored.-A long time heat treatment is required for the aging treatment within the shell. For Incoloy 903, 78
0'C - held for 8 hours → 620"C - held for 8 hours → air cooled,
or standard aging treatment conditions. In addition, if you try to perform aging treatment with the ceramic turbine wheel l and the metal shaft 4 combined after electron beam welding, for example, if you use the same furnace, it will be difficult to perform the heat treatment before they are combined. The problem arises that only a small quantity can be processed, resulting in a very low productivity.
なお第９図に示すように金属軸４を金属スリーブ３に嵌
合させ、Ａ方向から溶接する構造、あるいは第１Ｏ図に
示すように溶接部Ｂをより金属軸４側に移すべく金属ス
リーブ３を長くする構造が考えられるが、第９図に示さ
れる結合構造ではスリーブ３と金属軸４の嵌合面に対し
て直角方向の残留引っ張り応力（熱応力）が生じ、溶接
部分に割れが発生しやすく、また第１Ｏ図に示される結
合構造では金属軸４のフランジ部１３の肉厚を厚くしな
ければならず寸法上の制約から別の問題が生じる。As shown in FIG. 9, the metal shaft 4 is fitted into the metal sleeve 3 and welded from the direction A, or as shown in FIG. However, in the joint structure shown in Figure 9, residual tensile stress (thermal stress) occurs in the direction perpendicular to the mating surface of the sleeve 3 and metal shaft 4, causing cracks in the welded part. In addition, in the coupling structure shown in FIG. 1O, the thickness of the flange portion 13 of the metal shaft 4 must be increased, which causes another problem due to dimensional constraints.
本発明は上記問題を解決する目的でなされたものであり
、その解決しようとする課題は、強固な結合が得られし
かも非常に生産性よ〈実施できるセラミックス製回転体
と金属軸の結合構造を提供することである。The present invention was made for the purpose of solving the above problems, and the object of the present invention is to provide a structure for connecting a ceramic rotating body and a metal shaft that can provide a strong connection and be highly productive. It is to provide.
（課題を解決するための手段〉
上記課題を解決するための本発明のセラミックス回転体
と金属軸の結合構造は、セラミックス製回転体の軸突起
部に嵌合固定した析出硬化合金製スリーブの他端に、金
属軸をそのフランジ部を以って溶接した構造であって、
該フランジ部と上記スリーブとの溶接接合面を、セラミ
ックス製回転体の軸突起部端面より金属軸側において回
転中心軸とは鋭角（９Ｑ’より小さい角）をなして金属
軸側に傾斜するテーパ面としたことを特徴とする。(Means for Solving the Problems) In order to solve the above problems, the coupling structure of a ceramic rotating body and a metal shaft of the present invention includes a precipitation-hardened alloy sleeve fitted and fixed to a shaft protrusion of a ceramic rotating body. It has a structure in which a metal shaft is welded to the end with its flange,
The welded joint surface between the flange portion and the sleeve is tapered so as to form an acute angle (an angle smaller than 9Q') with the rotation center axis on the metal shaft side from the end surface of the shaft protrusion of the ceramic rotating body and slope toward the metal shaft side. It is characterized by having a face.
即ち本発明の結合構造は、セラミックス製回転体の回転
中心部に形設されている軸突起部に、析出硬化型合金か
らなる金属スリーブを、化学的結合による接合状態を有
さない機械的結合、例えば加熱後の金属スリーブの熱収
縮による締め付は力を利用した焼はめ、もしくはロウ付
は材を使用した中間金属充填による結合等で固定させた
後、その金属スリーブの他端に、別の金属からなり溶接
用フランジ部が形設されている金属軸を、電子ビームも
しくはレーザ等の高エネルギー密度熱源を用いた溶接法
により接合して構成されるセラミックス製回転体と金属
軸の結合構造において、結合継手である金属スリーブの
溶接面を金属軸側に向つて径が拡大するテーパ形状とし
、それに対応する形の突き合わせ面を金属軸の溶接用フ
ランジ部に設け、テーパ当接させたこれら両部材に、回
転軸に対して金属軸側斜方向から高エネルギー密度熱源
を照射して金属スリーブと金属軸を溶接したものである
。That is, the bonding structure of the present invention connects a metal sleeve made of a precipitation hardening alloy to a shaft protrusion formed at the center of rotation of a ceramic rotating body through mechanical bonding that does not involve chemical bonding. For example, tightening by heat shrinkage of a metal sleeve after heating is done by shrink fitting using force, or brazing is done by joining by intermediate metal filling using material, and then the other end of the metal sleeve is attached separately. A structure in which a ceramic rotating body and a metal shaft are joined by welding a metal shaft made of metal with a welding flange formed using a high energy density heat source such as an electron beam or laser. In these methods, the welding surface of the metal sleeve, which is a coupling joint, has a tapered shape whose diameter increases toward the metal shaft side, and a matching surface of a corresponding shape is provided on the welding flange of the metal shaft, and the taper abuts the welding surface. The metal sleeve and metal shaft are welded by irradiating both members with a high energy density heat source from an oblique direction on the metal shaft side with respect to the rotating shaft.
〈作用〉
以上のように構成すると、溶接熱影響部すなわち金属ス
リーブの再溶体化による軟化領域は、セラミックス製回
転体との機械的結合部位にまで及ばない、したがって金
属スリーブのセラミックス製回転体への結合力は高エネ
ルギー溶接によって低下せず、セラミックス製回転体と
金属軸は強固に結合する。<Operation> With the above configuration, the weld heat affected zone, that is, the softened area due to re-solution of the metal sleeve does not extend to the mechanical connection area with the ceramic rotating body. The bond strength is not reduced by high-energy welding, and the ceramic rotating body and metal shaft are firmly bonded.
〈実施例〉
以下、本発明の結合構造の実施例を説明するが、これは
本発明を限定するものではない。<Examples> Examples of the bonding structure of the present invention will be described below, but the present invention is not limited thereto.
実施例１
本実施例に係るセラミックス製ターボロータシャフトの
セラミックス製タービンホイールｌと金属軸４の結合構
造を、第１図及びその部分拡大図である第２図により説
明する。セラミックス製タービンホイール１は窒化珪素
（Ｓｉ２Ｈ４）製てあり、その回転中心部に軸突起部２
が形設されている。Example 1 A coupling structure between a ceramic turbine wheel l and a metal shaft 4 of a ceramic turbo rotor shaft according to this example will be explained with reference to FIG. 1 and FIG. 2, which is a partially enlarged view thereof. The ceramic turbine wheel 1 is made of silicon nitride (Si2H4), and has a shaft protrusion 2 at its center of rotation.
is formed.
金属スリーブ３は、ＡＩとＴｉを組成分として含有する
析出硬化型の耐熱合金（インコロイ９０３）を機械加工
して製造されたものであり、該スリーブ３の内周面には
銅メツキが施されている。The metal sleeve 3 is manufactured by machining a precipitation-hardening type heat-resistant alloy (Incoloy 903) containing AI and Ti as components, and the inner peripheral surface of the sleeve 3 is plated with copper. ing.
軸突起部２の外径は、金属スリーブ３の内径より僅かに
小さくなっており、嵌挿した状態の軸突起部２の外周面
と金属スリーブ３の内周面の間には微小間隙が形成され
るが、これらは次のようにして固定される。セラミック
ス製タービンホイールｌと金属スリーブ３と線状ロウ付
は材（図示せず）を治具にセットし、真空炉中で加熱す
ることにより、軸突起部２の外周面と金属スリーブ３の
内周面の間の微小間隙に充填金属であるロウ付は材（７
２＄Ａｇ−２８１Ｃｕ ） ヲ充填ｔル、ロウｆｆケ材
カ充填された後の冷却過程で、ロウ付は材が凝固温度で
凝固した後、金属スリーブ３は温度の低下とともに収縮
し、その締付は力が結合面に作用し、焼ばめと同様の結
合力が得られる。このとき金属スリーブ３の軸突起部２
の外周に位置する部分、即ち金属スリーブ３の軟化か問
題となる領域１１には引っ張り応力が働いている。The outer diameter of the shaft protrusion 2 is slightly smaller than the inner diameter of the metal sleeve 3, and a minute gap is formed between the outer circumferential surface of the shaft protrusion 2 and the inner circumferential surface of the metal sleeve 3 in the fitted state. However, these are fixed as follows. The ceramic turbine wheel 1, the metal sleeve 3, and the wire brazing material (not shown) are set in a jig and heated in a vacuum furnace, so that the outer peripheral surface of the shaft protrusion 2 and the inner surface of the metal sleeve 3 are heated. A brazing material (7
2$Ag-281Cu) In the cooling process after filling and brazing the material, the metal sleeve 3 contracts as the temperature decreases and its tightening occurs after the material solidifies at the solidification temperature. When attaching, force acts on the bonding surface, resulting in a bonding force similar to that of a shrink fit. At this time, the shaft protrusion 2 of the metal sleeve 3
Tensile stress is acting on a portion located on the outer periphery of the metal sleeve 3, that is, a region 11 where softening of the metal sleeve 3 is a problem.
金属スリーブ３の軸突起部２先端側の端面（溶接接合面
９となる面）は、タービンホイール１の回転中心軸１０
に対して直交する而を金属軸４側に傾けた場合に形成さ
れる円錐面の一部（円錐台の外周側面：テーパ面）に相
当するよう形成されており、この面に金属軸４のフラン
ジ部１３に形成された同形状面を押し当てる。そしてタ
ービンホイールｌの回転軸に対して斜め方向から電子ビ
ーム溶接５を行なうことにより、セラミックス製タービ
ンホイール１と金属軸４が金属スリーブ３を介して結合
される。The end surface of the metal sleeve 3 on the tip side of the shaft protrusion 2 (the surface that becomes the welding joint surface 9) is connected to the rotation center axis 10 of the turbine wheel 1.
It is formed to correspond to a part of the conical surface (outer peripheral side of a truncated cone: tapered surface) that is formed when the surface perpendicular to the truncated cone is tilted toward the metal shaft 4 side. The same-shaped surfaces formed on the flange portion 13 are pressed against each other. Then, the ceramic turbine wheel 1 and the metal shaft 4 are joined via the metal sleeve 3 by performing electron beam welding 5 in a direction oblique to the rotating shaft of the turbine wheel 1.
第２図は、得られたセラミックス製ターボロータシャフ
トの電子ビーム溶接部を拡大して示す断面図である。溶
接ビート部６及び軟化した溶接熱影響部７はともに軸突
起部２と金属スリーブ３の結合部８より金属軸４側に形
成されており、金属スリーブ３の軟化が問題となる領域
１１には至っていない、したがって上記溶接によって軸
突起部２とスリーブ３の結合力が低下することはない。FIG. 2 is an enlarged sectional view showing the electron beam welded portion of the obtained ceramic turbo rotor shaft. Both the weld bead 6 and the softened weld heat affected zone 7 are formed closer to the metal shaft 4 than the joint 8 between the shaft protrusion 2 and the metal sleeve 3, and the area 11 where the softening of the metal sleeve 3 is a problem is Therefore, the bonding force between the shaft protrusion 2 and the sleeve 3 is not reduced by the welding.
実施例２
第３図は本発明の別の実施例を示したものである。金属
スリーブ３の溶接側端部に、軸突起部２と金属軸４とで
挟まれる座部１５が設けられており、この座部１５を囲
む周縁端面はテーパ面となっている。該テーパ面ならび
に座部１５の平面に対応する突き合わせ面がフランジ部
１３に形成されている金属軸４を上記スリーブ３に当接
させた状態で、金属軸４側の斜方向からレーザ溶接５す
る以外は実施例１と同様の構成であり、この結合構造に
おいても実施例１と同様の作用効果が得られる。Embodiment 2 FIG. 3 shows another embodiment of the present invention. A seat 15 that is sandwiched between the shaft protrusion 2 and the metal shaft 4 is provided at the welding side end of the metal sleeve 3, and the peripheral end surface surrounding the seat 15 is tapered. With the metal shaft 4, which has an abutting surface formed in the flange portion 13 that corresponds to the tapered surface and the flat surface of the seat portion 15, in contact with the sleeve 3, laser welding 5 is performed from an oblique direction on the metal shaft 4 side. Other than this, the structure is the same as in Example 1, and the same effects as in Example 1 can be obtained with this coupling structure as well.
（発明の効果〉
以上の如く、本発明のセラミックス回転体と金属軸の結
合構造によれば、析出硬化合金でできた金属スリーブを
継手として用いる結合構造において、該スリーブと金属
軸の溶接接合面を、セラミックス製回転体の軸突起部端
面より金属軸側で且つ回転中心軸に向って傾斜するテー
パ面としたことにより、溶接による再溶体化で生じる金
属スリーブの軟化領域がセラミックス製回転体との機械
的結合部位にまで及ばなくなり、結合力低下を来さない
結合か可能となる。(Effects of the Invention) As described above, according to the coupling structure of the ceramic rotating body and the metal shaft of the present invention, in the coupling structure using a metal sleeve made of a precipitation hardened alloy as a joint, the welded joint surface of the sleeve and the metal shaft is By making this a tapered surface that is closer to the metal shaft than the end surface of the shaft protrusion of the ceramic rotating body and inclined toward the rotational center axis, the softened area of the metal sleeve that occurs due to re-solution by welding can be prevented from forming a part of the ceramic rotating body. The mechanical bonding site is no longer reached, and bonding can be achieved without reducing the bonding strength.
電子ビーム溶接やレーザ溶接等の高エネルギー密度熱源
を用いる溶接法では、溶は込み深さＰに対する溶接ビー
ド巾Ｗの比Ｐ／Ｗが大きいため、溶接ビートの表面状態
を外１ＩｌＩ観察するたけては溶接状態の良否を判定す
ることができない。そのため超音波探傷検査か一般に行
なわれているが、検査すべき面に直角に超音波を入射す
ることが一般に必要とされることから１反射法により超
音波探傷検査を実施しようとした場合、第４図に示すよ
うに超音波の発信・受信を行なうプローブ１８を金属軸
４と干渉する位置に配さないと、溶接底部１６の溶接状
態の良否判定ができず、実際には検査か不可能となって
しまう、これに対し、本発明の結合構造では第５図に示
すようにプローブ１８を配することに支障がなく、溶接
底部１６の溶接状態の良否判定を容易に行なうことかで
きる。In welding methods that use high energy density heat sources such as electron beam welding and laser welding, the ratio P/W of the weld bead width W to the penetration depth P is large, so it is difficult to observe the surface condition of the weld bead externally. cannot judge whether the welding condition is good or bad. For this reason, ultrasonic flaw detection is generally performed, but since it is generally necessary to inject the ultrasonic waves at right angles to the surface to be inspected, when attempting to perform ultrasonic flaw detection using the one-reflection method, the As shown in Figure 4, unless the probe 18 that transmits and receives ultrasonic waves is placed in a position where it interferes with the metal shaft 4, it will not be possible to judge whether the welding condition of the weld bottom 16 is good or bad, and in fact, inspection is impossible. In contrast, in the joint structure of the present invention, there is no problem in arranging the probe 18 as shown in FIG. 5, and it is possible to easily judge whether the welding condition of the welded bottom part 16 is good or bad.
第１図は本発明の一実施例に係る、セラミックス製ター
ビンホイールと金属軸の結合構造を示す断面図、
第２図はその溶接部を拡大して示す断面図、第３図は他
の実施例の結合構造を示す断面図、第４図及び第５図は
従来例の短所及びそれが除かれる一実施例の効果を対比
させて説明する図、第６図は従来の結合構造の一例を示
す断面図。
第７図はその溶接部を拡大して示す断面図、第８図はそ
の溶接部の硬度測定部位とそこの硬度とを対応させて示
す図、
第９図及び第１０図は夫々従来他に考えられた結合構造
の問題点の説明図である。
図中：
１・・・セラミックス製タービンホイール２・・・軸突
起部 ３・・・金属スリーブ ４・・・金属軸５・・・
電子ビーム溶接又はレーザ溶接６・・・溶接ビート部
７・・・溶接熱影響部（軟化領域）
９・・・溶接接合面
１１・・・金属スリーブの軟化が問題となる領域１３−
・・フランジ部Fig. 1 is a cross-sectional view showing a coupling structure between a ceramic turbine wheel and a metal shaft according to one embodiment of the present invention, Fig. 2 is a cross-sectional view showing an enlarged welding part thereof, and Fig. 3 is a cross-sectional view showing another embodiment of the present invention. 4 and 5 are diagrams comparing and explaining the disadvantages of the conventional example and the effects of an embodiment that eliminates them. FIG. 6 is a cross-sectional view showing an example of the conventional joint structure. A sectional view shown. Fig. 7 is an enlarged sectional view of the welded part, Fig. 8 is a diagram showing the correspondence between the hardness measurement site of the welded part and the hardness there, and Figs. 9 and 10 are respectively FIG. 3 is an explanatory diagram of the problems of the considered bonding structure. In the figure: 1... Ceramic turbine wheel 2... Shaft protrusion 3... Metal sleeve 4... Metal shaft 5...
Electron beam welding or laser welding 6... Welding bead 7... Weld heat affected zone (softening area) 9... Welding joint surface 11... Area where softening of the metal sleeve is a problem 13-
・・Flange part
Claims (1)
化合金製スリーブの他端に、金属軸をそのフランジ部を
以って溶接した構造であって、該フランジ部と上記スリ
ーブとの溶接接合面を、セラミックス製回転体の軸突起
部端面より金属軸側において回転中心軸とは鋭角をなし
て金属軸側に傾斜するテーパ面としたことを特徴とする
セラミックス製回転体と金属軸の結合構造。It has a structure in which a metal shaft is welded at its flange to the other end of a precipitation-hardened alloy sleeve that is fitted and fixed to the shaft protrusion of a ceramic rotating body, and the flange and the sleeve are welded together. A combination of a ceramic rotating body and a metal shaft, characterized in that the surface is a tapered surface that forms an acute angle with the rotation center axis on the metal shaft side from the end face of the shaft protrusion of the ceramic rotating body and slopes toward the metal shaft side. structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63278112A JPH02127986A (en) | 1988-11-02 | 1988-11-02 | Structure for coupling ceramics body of rotation with metallic shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63278112A JPH02127986A (en) | 1988-11-02 | 1988-11-02 | Structure for coupling ceramics body of rotation with metallic shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02127986A true JPH02127986A (en) | 1990-05-16 |
Family
ID=17592791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63278112A Pending JPH02127986A (en) | 1988-11-02 | 1988-11-02 | Structure for coupling ceramics body of rotation with metallic shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02127986A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010134254A1 (en) * | 2009-05-19 | 2010-11-25 | 日本特殊陶業株式会社 | Spark plug |
| JP2011141953A (en) * | 2010-01-05 | 2011-07-21 | Ngk Spark Plug Co Ltd | Spark plug |
| WO2012032138A1 (en) * | 2010-09-09 | 2012-03-15 | Siemens Aktiengesellschaft | Method for joining two bars end-on by means of electron beam welding |
| WO2013138143A1 (en) * | 2012-03-15 | 2013-09-19 | Borgwarner Inc. | Exhaust-gas turbocharger |
| WO2016130300A1 (en) * | 2015-02-09 | 2016-08-18 | Borgwarner Inc. | Method of joining by electron beam or laser welding a turbocharger turbine wheel to a shaft; corresponding turbocharger turbine wheel |
-
1988
- 1988-11-02 JP JP63278112A patent/JPH02127986A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8664844B2 (en) | 2009-05-19 | 2014-03-04 | Ngk Spark Plug., Ltd. | Spark plug having a substantially columnar electrode tip welded to a component thereof |
| JP2010272212A (en) * | 2009-05-19 | 2010-12-02 | Ngk Spark Plug Co Ltd | Spark plug |
| WO2010134254A1 (en) * | 2009-05-19 | 2010-11-25 | 日本特殊陶業株式会社 | Spark plug |
| JP2011141953A (en) * | 2010-01-05 | 2011-07-21 | Ngk Spark Plug Co Ltd | Spark plug |
| WO2012032138A1 (en) * | 2010-09-09 | 2012-03-15 | Siemens Aktiengesellschaft | Method for joining two bars end-on by means of electron beam welding |
| CN103097071A (en) * | 2010-09-09 | 2013-05-08 | 西门子公司 | Method for joining two bars end-on by means of electron beam welding |
| US9073144B2 (en) | 2010-09-09 | 2015-07-07 | Siemens Aktiengesellschaft | Method for joining two bars end-on by means of electron beam welding |
| WO2013138143A1 (en) * | 2012-03-15 | 2013-09-19 | Borgwarner Inc. | Exhaust-gas turbocharger |
| CN104145100A (en) * | 2012-03-15 | 2014-11-12 | 博格华纳公司 | Exhaust-gas turbocharger |
| US9726020B2 (en) | 2012-03-15 | 2017-08-08 | Borgwarner Inc. | Exhaust-gas turbocharger |
| WO2016130300A1 (en) * | 2015-02-09 | 2016-08-18 | Borgwarner Inc. | Method of joining by electron beam or laser welding a turbocharger turbine wheel to a shaft; corresponding turbocharger turbine wheel |
| CN107206542A (en) * | 2015-02-09 | 2017-09-26 | 博格华纳公司 | The method that turbocharger turbine impeller is engaged in by electron beam or laser welding by axle, corresponding turbocharger turbine impeller |
| CN107206542B (en) * | 2015-02-09 | 2020-03-03 | 博格华纳公司 | Method for joining a turbocharger turbine wheel to a shaft and resulting assembly |
| US10603740B2 (en) | 2015-02-09 | 2020-03-31 | Borgwarner Inc. | Method of joining by electron beam or laser welding a turbocharger turbine wheel to a shaft; corresponding turbocharger turbine wheel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0444632B2 (en) | ||
| JPH043129Y2 (en) | ||
| US5365661A (en) | Ceramic-metal composite joint body | |
| JP3453302B2 (en) | Method of joining TiAl alloy member to structural steel and joining parts | |
| KR20020045485A (en) | Method of joining different metal materials by friction welding | |
| JP2752768B2 (en) | Joint structure of turbine rotor | |
| JPH02127986A (en) | Structure for coupling ceramics body of rotation with metallic shaft | |
| JP2531708Y2 (en) | Ceramic / metal composite | |
| US20180105914A1 (en) | Hybrid component and method of making | |
| JPH0477704B2 (en) | ||
| JPH0444631B2 (en) | ||
| WO1985001556A1 (en) | Built-up cam shaft and method of manufacture thereof | |
| JPS6227380A (en) | Method of joining axis of ceramic structure to boss of metalstructure | |
| JP2003088964A (en) | Joint structure of ceramics dispersed iron group alloy and its manufacturing method | |
| JPS61152902A (en) | Manufacture of turbine impeller made of ceramic with shaft | |
| JP2508823B2 (en) | How to connect a ceramic rotor to a metal shaft | |
| JPH0454196Y2 (en) | ||
| JPS62119180A (en) | Manufacture of ceramic shafted turbine blade | |
| JPH06658A (en) | Formation of joint for stainless steel products and different metallic material | |
| JP2536630B2 (en) | Method for joining ceramic member and metal member | |
| JP2613599B2 (en) | Piston and method of manufacturing the same | |
| JPH052585Y2 (en) | ||
| JPH0516192Y2 (en) | ||
| JPH063171B2 (en) | Ceramic-Metal Friction Welding Body and Ceramic Casting Piston Composed of It | |
| JPS59218286A (en) | Welding method of rotor for turbo-charger |