JP2002098090A - Impeller and its manufacturing method - Google Patents
Impeller and its manufacturing methodInfo
- Publication number
- JP2002098090A JP2002098090A JP2000290345A JP2000290345A JP2002098090A JP 2002098090 A JP2002098090 A JP 2002098090A JP 2000290345 A JP2000290345 A JP 2000290345A JP 2000290345 A JP2000290345 A JP 2000290345A JP 2002098090 A JP2002098090 A JP 2002098090A
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- Prior art keywords
- shroud
- blade
- impeller
- shroud portion
- circular
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は羽根車およびその製
造方法に関する。The present invention relates to an impeller and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】遠心羽根車およびターボ羽根車は、製造
コストの低減、溶接技術の進歩、強度上の優位性などか
ら溶接による製法が多用されており、最近では、羽根車
の溶接に電子ビーム溶接が採用されている。2. Description of the Related Art Centrifugal impellers and turbo impellers are often manufactured by welding due to reductions in manufacturing costs, advances in welding technology, superior strength, and the like. Welding is employed.
【０００３】例えば特開平5-187395号公報には、電子ビ
ーム溶接により羽根車の羽根と上シュラウドとを溶接す
ること、そして、電子ビーム溶接により生じる溶接対象
個所の隙間（未溶着部）を銀ろうにより密閉することに
より、間隙に腐食性成分含有のガスが浸入することが防
止できることが開示されている。[0003] For example, Japanese Patent Application Laid-Open No. 5-187395 discloses that an impeller blade and an upper shroud are welded by electron beam welding, and a gap (unwelded portion) at a welding target portion generated by electron beam welding is formed of silver. It is disclosed that by sealing with a wax, it is possible to prevent a gas containing a corrosive component from entering the gap.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、実験に
より上記従来の技術で羽根と上シュラウドとをビーム溶
接した羽根車を製作し、疲労試験を行ったところ、羽根
付け根部よりき裂が発生し、羽根車として使用できない
ことが解った。However, an impeller in which the blade and the upper shroud were beam-welded by the above-mentioned conventional technique was manufactured by an experiment, and a fatigue test was performed. As a result, a crack was generated from the root of the blade. It turned out that it could not be used as an impeller.
【０００５】本発明は、羽根と上シュラウドとの溶接部
の強度が十分である高信頼性の羽根車およびその製造方
法を提供することを目的とする。An object of the present invention is to provide a highly reliable impeller having a sufficient strength at a welded portion between the blade and the upper shroud, and a method for manufacturing the same.
【０００６】[0006]
【発明が解決するための手段】本願発明者は、上記課題
を解決するために鋭意研究した結果、電子ビーム箇所や
溶接部形状が溶接部の強度（応力）に大きく影響を及ぼ
すこと、すなわち、羽根部と上シュラウドとをビーム溶
接したままでは、羽根付け根部に応力が集中することを
見出し本願発明に至った。Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, it has been found that the location of the electron beam and the shape of the welded portion greatly affect the strength (stress) of the welded portion. It has been found that stress concentrates on the blade root portion when the blade portion and the upper shroud are beam-welded, and the present invention has been accomplished.
【０００７】溶接部の応力（応力集中）を低減する方法
として溶接部に大きな曲率を形成することは知られてい
るが本願発明対象の羽根車では羽根と上シュラウドとの
間隔が狭く、グラインダー等で機械的に仕上げることは
困難であるため、機械的仕上を用いずに溶接部に大きな
曲率を形成した羽根車およびその製造方法を見出した。As a method of reducing the stress (stress concentration) at the welded portion, it is known to form a large curvature at the welded portion. However, in the impeller of the present invention, the distance between the blade and the upper shroud is narrow, and the grinder or the like is used. Since it is difficult to mechanically finish the impeller, the inventors have found an impeller having a large curvature at a weld without using a mechanical finish, and a method of manufacturing the impeller.
【０００８】本願発明の課題は、例えば第１シュラウド
部（上シュラウド）と、第１シュラウド部に対向する位
置に配置された、第２シュラウド部（下シュラウド）
と、複数の羽根部とを備え、羽根部の第１シュラウド部
の径方向の両辺を、第１シュラウド部の第２シュラウド
部側とは反対側から溶接することにより解決されえる。An object of the present invention is to provide, for example, a first shroud portion (upper shroud) and a second shroud portion (lower shroud) arranged at a position facing the first shroud portion.
And a plurality of blade portions, and the two shroud portions of the blade portions are welded from both sides of the first shroud portion in the radial direction from the side opposite to the second shroud portion side of the first shroud portion.
【０００９】本構造の羽根車は羽根部とシュラウド部と
の応力集中箇所が確実に溶接されているため、高い信頼
性を有する。[0009] The impeller of the present structure has high reliability because the stress concentration portion between the blade portion and the shroud portion is securely welded.
【００１０】また、本願発明の課題は、例えば羽根車の
製造方法において、第１シュラウド部の羽根部が溶接さ
れる位置に溶接部が前記羽根部と同一形状の羽根模擬部
材を配置した状態で前記羽根模擬部材をすみ肉溶接する
工程と、しかる後に、前記羽根模擬部材を取り除き、前
記羽根模擬部材を取り除いた位置に前記羽根部を配置
し、前記すみ肉部と前記羽根部の界面を前記第１シュラ
ウド部の前記第２シュラウド部側とは反対側から電子ビ
ーム溶接する工程とにより解決することができる。Another object of the present invention is to provide, for example, a method of manufacturing an impeller in which a blade simulating member having the same shape as the blade is disposed at a position where the blade of the first shroud is welded. A step of fillet welding the blade simulating member, and thereafter, removing the blade simulating member, disposing the blade portion at a position where the blade simulating member is removed, and setting the interface between the fillet portion and the blade portion to Electron beam welding from a side of the first shroud portion opposite to the side of the second shroud portion.
【００１１】本製造方法によれば、未溶着欠陥を除くこ
とができるので、信頼性の高い羽根車を製造することが
できる。According to the present manufacturing method, since unwelded defects can be removed, a highly reliable impeller can be manufactured.
【００１２】また、本願発明の課題は、例えば羽根車の
製造方法において、第１シュラウド部と、羽根部と、第
２シュラウド部とを最終形状となるように配置した後、
１シュラウド部と羽根部とが接する位置にろう材を置く
工程と、しかる後に、ろう材と接する領域に曲率が形成
された治具を羽根部の両側に押し当てた状態で、ろう材
と羽根部との界面を第１シュラウド部の第２シュラウド
部側とは反対側から電子ビーム溶接する工程により解決
される。Another object of the present invention is to provide a method for manufacturing an impeller, for example, after arranging a first shroud portion, a blade portion, and a second shroud portion to have a final shape.
(1) A step of placing the brazing material at a position where the shroud portion and the blade contact each other, and thereafter, the brazing material and the blade are pressed in a state where a jig having a curvature formed in a region in contact with the brazing material is pressed against both sides of the blade. The problem is solved by a step of performing electron beam welding on the interface between the first shroud portion and the second shroud portion side from the other side.
【００１３】または、第２シュラウド部と羽根部とが一
体に形成された部材の羽根部の上にろう材を介して第１
シュラウドを配置する工程と、しかる後に、羽根部を第
１シュラウド部の第２シュラウド部側とは反対側から電
子ビーム溶接する工程と、さらに、第２シュラウドを上
側、第１シュラウドを下側にした状態で羽根車を熱処理
する工程とにより解決される。Alternatively, the first shroud portion and the blade portion are integrally formed on the blade portion of the member integrally formed with the first shroud portion via a brazing material.
A step of disposing the shroud, and thereafter, a step of electron beam welding the blade section from the side of the first shroud section opposite to the side of the second shroud section, and further, the second shroud is positioned upward and the first shroud is positioned downward. And a step of heat-treating the impeller in a state where the impeller has been set.
【００１４】本製造方法によれば、溶接部を滑らかに、
そして溶接部の曲率を大きくすることができるので、信
頼性の高い羽根車を製造することができる。According to the present manufacturing method, the welded portion can be made smooth,
And since the curvature of a welding part can be enlarged, a highly reliable impeller can be manufactured.
【００１５】[0015]
【発明の実施の形態】以下、本発明の一実施例である羽
根車を図面を用いて詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
【００１６】図１は、本実施例に係る羽根車の外形図で
ある。FIG. 1 is an external view of an impeller according to this embodiment.
【００１７】羽根車１は主に、中心部に開口部を有する
円形状の下シュラウド部４と、上シュラウド部２、そし
て下シュラウド部４と上シュラウド部２との間に一定の
曲線を描きつつ前記下シュラウド部４の中心部から外周
部へ放射状に複数枚取付けられた羽根部３により構成さ
れている。、通常、本実施例のような羽根車を製作する
方法として精密鋳造法による一体製作や、放電加工によ
る方法、拡散接合による方法等があるが、表面粗さが粗
い、コストが高い、多大な時間を要するなど問題が多い
ことから、溶接により組立製造する方法が主流となって
いる。The impeller 1 mainly draws a constant curve between a circular lower shroud portion 4 having an opening at the center, an upper shroud portion 2, and the lower shroud portion 4 and the upper shroud portion 2. In addition, the lower shroud portion 4 is constituted by a plurality of blades 3 radially attached from a central portion to an outer peripheral portion. Usually, as a method of manufacturing an impeller as in the present embodiment, there are integrated manufacturing by a precision casting method, a method by electric discharge machining, a method by diffusion bonding, etc., but the surface roughness is rough, the cost is high, Since there are many problems such as a long time, a method of assembling and manufacturing by welding is mainly used.
【００１８】また、羽根車は、回転体であり、回転数が
高くなるに従い、遠心応力と振動応力の重畳された大き
な応力を受けるため、応力集中部である羽根付け根部に
は、溶接止端形状を滑らかなR形状に形成することが不
可欠である。さらに、羽根車の材質は、、例えば、硫化
水素、炭酸ガス、高温多湿等の使用される環境に応じた
材料を選定して使用される。Further, the impeller is a rotating body, and receives a large stress in which centrifugal stress and vibration stress are superimposed as the number of rotations increases. It is essential to form the shape into a smooth R shape. Furthermore, the material of the impeller is selected and used according to the environment in which it is used, for example, hydrogen sulfide, carbon dioxide, high temperature and high humidity.
【００１９】本実施例では、上記を勘案し、電子ビーム
溶接により羽根車を製造した。In this embodiment, in consideration of the above, an impeller was manufactured by electron beam welding.
【００２０】電子ビーム溶接は、高真空中で高速の電子
ビームを材料に照射し、その衝撃熱を利用して溶接する
方法であり、高真空中で行うため材料を選ばずに溶接が
できる。Electron beam welding is a method of irradiating a material with a high-speed electron beam in a high vacuum and using the impact heat to perform welding. Since the welding is performed in a high vacuum, welding can be performed regardless of the material.
【００２１】また、電子ビームはレンズによって絞込
み、エネルギーを集中できるため、高融点材料の溶接が
可能であり、溶け込みが深いので一気に溶接できるうえ
に変形も少なく、ビーム出力を正確に制御できるので、
薄物から厚板まで広範囲な溶接が可能な溶接方法であ
る。Further, since the electron beam can be focused by a lens and the energy can be concentrated, it is possible to weld a high melting point material.
This welding method enables a wide range of welding from thin to thick plates.
【００２２】本実施例では析出硬化型ステンレス鋼であ
るSUS630を羽根車の材料として使用した。SUS630はその
特性から高応力対応の機種に適している。また、硫化水
素雰囲気対応の羽根車にはSCM430が適している。In this embodiment, SUS630, which is a precipitation hardening stainless steel, is used as a material for the impeller. SUS630 is suitable for high stress compatible models due to its characteristics. In addition, SCM430 is suitable for an impeller compatible with hydrogen sulfide atmosphere.
【００２３】図２は、本実施例の羽根車の製造方法を図
示したものである。以下に製造工程ごとに詳細に説明す
る。FIG. 2 illustrates a method of manufacturing the impeller of this embodiment. Hereinafter, each manufacturing process will be described in detail.
【００２４】まず第１工程として上シュラウド部２に羽
根部３と同等の形状をしたセラミックス製の羽根模擬セ
ラミックス７を押付けすみ肉溶接８を施す（ａ）。セラ
ミックスは、耐熱性が高く溶接の温度に耐え、溶接後の
はく離が容易である。First, as a first step, a fillet weld 8 is applied to the upper shroud portion 2 by pressing a blade simulated ceramics 7 made of ceramic having a shape equivalent to that of the blade portion 3 (a). Ceramics have high heat resistance, withstand the welding temperature, and are easy to peel off after welding.
【００２５】なお、本実施例では、羽根模擬は羽根と同
等の形状としたが、少なくとも溶接部のみ羽根部と同等
の形状としておけば良い。また、羽根模擬の材料として
はセラミックス以外として石膏等が使用できる。石膏
は、水溶性の石膏を使用することにより、溶接後に水に
より、簡単に取除くことが出来る等点で優れている。In the present embodiment, the blade simulation has the same shape as the blade, but at least the welded portion may have the same shape as the blade. As a material for simulating the blade, gypsum or the like can be used other than ceramics. Gypsum is superior in that water-soluble gypsum can be easily removed with water after welding.
【００２６】次に、第１工程として羽根模擬セラミック
ス７を取外す（ｂ）。Next, the blade simulating ceramics 7 is removed as a first step (b).
【００２７】さらに、第３工程として溶接止端部のみグ
ラインダ仕上げをした後、羽根部３を嵌め込み、すみ肉
溶接８と羽根部３との境界部を上シュラウド部２側より
電子ビーム溶接５を行うことにより、未溶着欠陥のない
羽根車１の製造が可能となる（ｃ）。Further, as a third step, only the weld toe is finished with a grinder, the blade 3 is fitted, and the boundary between the fillet weld 8 and the blade 3 is subjected to the electron beam welding 5 from the upper shroud 2 side. By doing so, it becomes possible to manufacture the impeller 1 without unwelded defects (c).
【００２８】図３は、従来の溶接による羽根車の製作法
の内、上シュラウド部２と下シュラウド部４との開口幅
１３が非常に狭い場合を示している。狭間隙の製作可能
な開口幅１３は、溶接棒（手動溶接の場合）の径、溶接
止端部を仕上げるグラインダ工具の径によって決定され
るが、現状では５ｍｍ程度である。（ａ）上シュラウド
部２に羽根部３と下シュラウド部４が一体となった部材
を押付ける。（ｂ）上シュラウド部２と羽根部３の間を
ＭＩＧ溶接等で両側より溶接する。（ｃ）流路の確保な
らびに溶接止端仕上げのためにを熟練工がグラインダ仕
上げ９を施す。開口幅１３が狭い場合、グラインダ仕上
げ９は熟練工といえども難しく、時間を要する作業とな
る。ここで、図２のごとく、先に、上シュラウド部２に
すみ肉溶接を施し後、下シュラウド部４を電子ビーム溶
接５を行う方法を採用すれば、開口幅１３が狭くても問
題とならない。開口幅１３が狭い場合は、従来、精密鋳
造法による一体製作や、放電加工により狭間隙部分を除
去する方法、拡散接合による方法等が取られていたが、
表面粗さが粗い、コストが高い、多大な時間を要するな
ど問題が多く、さらに、羽根３が２次元形状から、３次
元形状になった場合、上記の方法ではほとんど不可能で
あった。本発明であれば、狭間隙で３次元形状の羽根に
おいても製作が可能である。FIG. 3 shows a case where the opening width 13 between the upper shroud portion 2 and the lower shroud portion 4 is very narrow in the conventional method of manufacturing an impeller by welding. The opening width 13 at which the narrow gap can be manufactured is determined by the diameter of a welding rod (in the case of manual welding) and the diameter of a grinder tool for finishing a weld toe, but is currently about 5 mm. (A) A member in which the blade 3 and the lower shroud 4 are integrated with the upper shroud 2 is pressed. (B) The space between the upper shroud 2 and the blade 3 is welded from both sides by MIG welding or the like. (C) A skilled worker performs a grinder finish 9 to secure the flow path and finish the weld toe. When the opening width 13 is narrow, the grinder finishing 9 is a difficult and time-consuming operation even for a skilled worker. Here, as shown in FIG. 2, if a method in which the upper shroud portion 2 is first subjected to fillet welding and then the lower shroud portion 4 is subjected to electron beam welding 5 is adopted, there is no problem even if the opening width 13 is small. . In the case where the opening width 13 is narrow, conventionally, an integrated production by a precision casting method, a method of removing a narrow gap portion by electric discharge machining, a method of diffusion bonding, and the like have been taken.
There are many problems such as rough surface roughness, high cost, and a great amount of time. Further, when the blade 3 changes from a two-dimensional shape to a three-dimensional shape, the above-described method is almost impossible. According to the present invention, it is possible to manufacture even a three-dimensional blade with a narrow gap.
【００２９】図４の羽根車１の製造方法は、市販の析出
硬化型ステンレス鋼であるSUS630あるいはSCM430の材料
を使用し、（ａ）上シュラウド部２と下シュラウド部４
の間の流路形状と同等形状のセラミックス製あるいは石
膏製の部材９を羽根部３に押付け、上シュラウド部２と
羽根部３との両端部に置きろう材１０を設置する。
（ｂ）次に、置きろう材１０と羽根部３の境界部に上シ
ュラウド部２の側より電子ビーム溶接５を行う。（ｃ）
流路形状部材９を取去り、置きろう材１０が溶融してす
み肉部を形成するため未溶着欠陥のない羽根車１の製造
が可能となる。The method of manufacturing the impeller 1 shown in FIG. 4 uses a material of commercially available precipitation hardening stainless steel, SUS630 or SCM430, and (a) an upper shroud portion 2 and a lower shroud portion 4.
A member 9 made of ceramic or gypsum having the same shape as that of the flow path is pressed against the blade portion 3, and a brazing material 10 is placed on both ends of the upper shroud portion 2 and the blade portion 3.
(B) Next, the electron beam welding 5 is performed on the boundary between the brazing material 10 and the blade 3 from the upper shroud 2 side. (C)
Since the flow path shape member 9 is removed and the brazing material 10 is melted to form a fillet portion, the impeller 1 free from unwelded defects can be manufactured.
【００３０】図５の羽根車１の製造方法は、市販の析出
硬化型ステンレス鋼であるSUS630あるいはSCM430の材料
を使用し、（ａ）上シュラウド部２に羽根部３と下シュ
ラウド部４が一体となった部材を羽根部３の端部にはみ
出した形状の置きろう材（Ni系のろう材）１１を介して
押付けた後、（ｂ）上シュラウド部２側より電子ビーム
溶接５を行う。溶接終了後、（ｃ）羽根車１を反転さ
せ、置きろう材１１と羽根車材1に対して真空熱処理を
施すことにより、置きろう材11を滑らかなすみ肉形状に
形成させる。本熱処理はステンレス鋼の酸化膜の付着等
の弊害から、10~4Torr以下の真空状態で熱処理炉で行っ
た。The method for manufacturing the impeller 1 shown in FIG. 5 uses a material of commercially available precipitation hardening stainless steel, SUS630 or SCM430, and (a) the upper shroud section 2 integrally includes the blade section 3 and the lower shroud section 4. Is pressed through a brazing filler metal (Ni-based brazing material) 11 having a shape protruding from the end of the blade portion 3, and (b) the electron beam welding 5 is performed from the upper shroud portion 2 side. After the welding is completed, (c) the impeller 1 is turned over and the brazing material 11 and the impeller material 1 are subjected to a vacuum heat treatment to form the brazing material 11 into a smooth fillet shape. This heat treatment was performed in a heat treatment furnace in a vacuum state of 10 to 4 Torr or less due to adverse effects such as adhesion of an oxide film of stainless steel.
【００３１】また、熱処理温度は８００℃以上１１００
℃以下の範囲で行った。熱処理温度が８００℃より低い
とろう材が滑らかなすみ肉形状にならない。また、熱処
理温度が１１００℃を越えると羽根車自体が熱変形する
可能性がある。The heat treatment temperature is 800 ° C. or higher and 1100
The test was performed at a temperature of not more than ° C. If the heat treatment temperature is lower than 800 ° C., the brazing material does not have a smooth fillet shape. If the heat treatment temperature exceeds 1100 ° C., the impeller itself may be thermally deformed.
【００３２】[0032]
【発明の効果】本発明の羽根車の製造方法により、未溶
着部がなくなり、応力集中の緩和、疲労強度の向上によ
り、高信頼性の羽根車を提供できる。According to the method for manufacturing an impeller of the present invention, a high reliability impeller can be provided by eliminating unwelded portions, reducing stress concentration and improving fatigue strength.
【図１】本発明の一実施例に係る羽根車の概略図であ
る。FIG. 1 is a schematic view of an impeller according to one embodiment of the present invention.
【図２】本発明の一実施例に係る羽根車の製造方法の概
略図FIG. 2 is a schematic view of a method for manufacturing an impeller according to one embodiment of the present invention.
【図３】従来の開口幅の狭い羽根車の製造方法の概略図FIG. 3 is a schematic view of a conventional method for manufacturing an impeller having a narrow opening width.
【図４】本発明の一実施例に係る羽根車の製造方法の概
略図FIG. 4 is a schematic view of a method for manufacturing an impeller according to one embodiment of the present invention.
【図５】本発明の一実施例に係る羽根車の製造方法の概
略図FIG. 5 is a schematic view of a method for manufacturing an impeller according to one embodiment of the present invention.
1…羽根車、2…上シュラウド部、3…羽根部、4…下シュ
ラウド部、5…電子ビーム溶接、６…未溶着部、７…羽
根模擬セラミックス、８…すみ肉溶接、１０…流路形状
セラミックス、１２…置きろう材。1 impeller, 2 upper shroud section, 3 blade section, 4 lower shroud section, 5 electron beam welding, 6 unwelded section, 7 blade simulated ceramics, 8 fillet welding, 10 flow path Shape ceramics, 12 ... brazing material.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小林 博美 茨城県土浦市神立町603番地 株式会社日 立製作所産業機械システム事業部内 (72)発明者 武田 和夫 茨城県土浦市神立町603番地 株式会社日 立製作所産業機械システム事業部内 (72)発明者 八重樫 賢司 茨城県土浦市神立町603番地 株式会社日 立製作所産業機械システム事業部内 Ｆターム(参考） 3H033 AA02 BB02 BB06 CC01 DD25 EE02 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiromi Kobayashi 603, Kandamachi, Tsuchiura-shi, Ibaraki Pref. Industrial Machinery Systems Division, Hitachi, Ltd. (72) Kazuo Takeda 603, Kandamachi, Tsuchiura-shi, Ibaraki, Japan (72) Inventor Kenji Yaegashi 603, Kandamachi, Tsuchiura-shi, Ibaraki F-term (Information) Industrial Machinery Systems Division, Hitachi Ltd. 3H033 AA02 BB02 BB06 CC01 DD25 EE02
Claims (6)
ラウド部と、前記第１シュラウド部に対向する位置に配
置された、中心部に開口部を有する円形状の第２シュラ
ウド部と、前記第１シュラウド部と前記第２シュラウド
部との間に配置された複数の羽根部と、を備え、前記羽
根部の前記第１シュラウド部の径方向の両辺が、前記第
１シュラウド部の前記第２シュラウド部側とは反対側か
ら溶接されている羽根車。1. A circular first shroud having an opening at a central portion, and a second circular shroud having an opening at a central portion disposed at a position facing the first shroud. A plurality of blade portions disposed between the first shroud portion and the second shroud portion, and both radial sides of the first shroud portion of the blade portion are defined by the first shroud portion. An impeller welded from a side opposite to the second shroud part side.
と前記羽根部とが一体成形されている羽根車。2. An impeller according to claim 1, wherein said second shroud portion and said blade portion are integrally formed.
ラウド部と、前記第１シュラウド部に対向する位置に配
置された、中心部に開口部を有する円形状の第２シュラ
ウド部と、前記第１シュラウド部と前記第２シュラウド
部との間に配置された複数の羽根部と、を備えた羽根車
の製造方法であって、下記の工程を有する羽根車の製造
方法。前記第１シュラウド部の前記羽根部が溶接される
位置に、溶接部が前記羽根部と同一形状の羽根模擬部材
を配置した状態で前記羽根模擬部材をすみ肉溶接する工
程。しかる後に、前記羽根模擬部材を取り除き、前記羽
根模擬部材を取り除いた位置に前記羽根部を配置し、前
記すみ肉部と前記羽根部の界面を前記第１シュラウド部
の前記第２シュラウド部側とは反対側から電子ビーム溶
接する工程。3. A circular first shroud having an opening at a central portion, and a second circular shroud having an opening at a central portion disposed at a position facing the first shroud. A method of manufacturing an impeller, comprising: a plurality of blade portions disposed between the first shroud portion and the second shroud portion, wherein the method includes the following steps. A step of fillet-welding the blade simulating member in a state where a blade simulating member having the same shape as the blade is disposed at a position where the blade is welded to the first shroud portion. Thereafter, the blade simulating member is removed, the blade portion is disposed at a position where the blade simulating member is removed, and the interface between the fillet portion and the blade portion is brought into contact with the second shroud portion side of the first shroud portion. Is a process of electron beam welding from the opposite side.
ラウド部と、前記第１シュラウド部に対向する位置に配
置された、中心部に開口部を有する円形状の第２シュラ
ウド部と、前記第１シュラウド部と前記第２シュラウド
部との間に配置された複数の羽根部と、を備えた羽根車
の製造方法であって、下記の工程を有する羽根車の製造
方法。前記第１シュラウド部と、前記羽根部と、前記第
２シュラウド部とを最終形状となるように配置した後、
前記１シュラウド部と前記羽根部とが接する位置にろう
材を置く工程。しかる後に、前記ろう材と接する領域に
曲率が形成された治具を前記羽根部の両側に押し当てた
状態で、ろう材と前記羽根部との界面を前記第１シュラ
ウド部の前記第２シュラウド部側とは反対側から電子ビ
ーム溶接する工程。4. A circular first shroud portion having an opening at a center portion, and a second circular shroud portion having an opening portion at a center portion, the second shroud portion being disposed at a position facing the first shroud portion. A method of manufacturing an impeller, comprising: a plurality of blade portions disposed between the first shroud portion and the second shroud portion, wherein the method includes the following steps. After arranging the first shroud portion, the blade portion, and the second shroud portion to have a final shape,
Placing a brazing material at a position where the one shroud portion and the blade portion are in contact with each other. Thereafter, the interface between the brazing material and the blade portion is brought into contact with the second shroud of the first shroud portion while a jig having a curvature formed in a region in contact with the brazing material is pressed against both sides of the blade portion. Electron beam welding from the side opposite to the part side.
ラウド部と、前記第１シュラウド部に対向する位置に配
置された、中心部に開口部を有する円形状の第２シュラ
ウド部と、前記第１シュラウド部と前記第２シュラウド
部との間に配置された複数の羽根部と、を備えた羽根車
の製造方法であって、下記の工程を有する羽根車の製造
方法。前記第２シュラウド部と前記羽根部とが一体に形
成された部材の前記羽根部の上にろう材を介して前記第
１シュラウドを配置する工程。しかる後に、前記羽根部
を前記第１シュラウド部の前記第２シュラウド部側とは
反対側から電子ビーム溶接する工程。さらに、前記第２
シュラウドを上側、前記第１シュラウドを下側にした状
態で前記羽根車を熱処理する工程。5. A circular first shroud portion having an opening at a central portion, and a second circular shroud portion having an opening at a central portion and arranged at a position facing the first shroud portion. A method of manufacturing an impeller, comprising: a plurality of blade portions disposed between the first shroud portion and the second shroud portion, wherein the method includes the following steps. Arranging the first shroud via a brazing material on the blade portion of the member in which the second shroud portion and the blade portion are integrally formed. Thereafter, a step of electron beam welding the blade section from the side of the first shroud section opposite to the side of the second shroud section. Further, the second
Heat treating the impeller with the shroud on the upper side and the first shroud on the lower side.
rr以下の真空状態で８００℃以上１１００℃以下の温度
で行う羽根車の製造方法。6. The method according to claim 5, wherein the heat treatment is performed for 10 to 4 To
A method for producing an impeller, which is performed at a temperature of 800 ° C. or more and 1100 ° C. or less in a vacuum state of rr or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000290345A JP2002098090A (en) | 2000-09-20 | 2000-09-20 | Impeller and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000290345A JP2002098090A (en) | 2000-09-20 | 2000-09-20 | Impeller and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002098090A true JP2002098090A (en) | 2002-04-05 |
Family
ID=18773584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000290345A Pending JP2002098090A (en) | 2000-09-20 | 2000-09-20 | Impeller and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002098090A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8426766B2 (en) | 2007-10-10 | 2013-04-23 | Hitachi Plant Technologies, Ltd. | Welding method and welding apparatus for an impeller |
| KR20190060437A (en) * | 2017-11-24 | 2019-06-03 | 주식회사 포스코 | Fan impeller and weling method thereof, welded structure |
-
2000
- 2000-09-20 JP JP2000290345A patent/JP2002098090A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8426766B2 (en) | 2007-10-10 | 2013-04-23 | Hitachi Plant Technologies, Ltd. | Welding method and welding apparatus for an impeller |
| KR20190060437A (en) * | 2017-11-24 | 2019-06-03 | 주식회사 포스코 | Fan impeller and weling method thereof, welded structure |
| KR102080898B1 (en) * | 2017-11-24 | 2020-02-24 | 주식회사 포스코 | Fan impeller and weling method thereof, welded structure |
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