JPH05305376A - Method for forming blade for oblique flow fan - Google Patents

Method for forming blade for oblique flow fan

Info

Publication number
JPH05305376A
JPH05305376A JP15400492A JP15400492A JPH05305376A JP H05305376 A JPH05305376 A JP H05305376A JP 15400492 A JP15400492 A JP 15400492A JP 15400492 A JP15400492 A JP 15400492A JP H05305376 A JPH05305376 A JP H05305376A
Authority
JP
Japan
Prior art keywords
blade
welded
plate material
hollow
welding
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.)
Granted
Application number
JP15400492A
Other languages
Japanese (ja)
Other versions
JPH0741338B2 (en
Inventor
Akira Tomita
旭 富田
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.)
Asahi M & Ii Kk
Original Assignee
Asahi M & Ii Kk
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 Asahi M & Ii Kk filed Critical Asahi M & Ii Kk
Priority to JP4154004A priority Critical patent/JPH0741338B2/en
Publication of JPH05305376A publication Critical patent/JPH05305376A/en
Publication of JPH0741338B2 publication Critical patent/JPH0741338B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

PURPOSE:To reduce the weight of blade by cutting a metallic slab to be a blade sheet material, pressurizing the center part of the blade sheet material to be a raw material for the blade, bending the blade raw material to be a hollow blade having no welded ends, preliminarily welding both ends of the hollow blade, then normally welding the preliminarily welded ends of the blade. CONSTITUTION:The manufacture of the blade consists of a cutting process in which the metallic sheet material having the size of an extended blade is cut to be the raw material for the blade, a pressurizing process in which the center part of the blade sheet material is pressurized to be the blade raw material having a curvature in its center part. Also it consists of a bending process in which the tip part 25 of the blade sheet material is bent to be the hollow blade having a front edge 26 and a rear face 27 which are not welded each other, a preliminary welding process in which the end part 28 of the front edge and the end part 29 of the rear face are preliminarily welded to be a preliminarily welded blade and a welding process in which the preliminarily welded end parts are normally welded 32 to be the hollow blade. Thus, the blade is different from a forged blade and the weight is reduced and balancing is easily obtained when it is welded on an impeller. Consequently, the working efficiency is improved and the working noise is reduced.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、斜流ファン用ブレード
の成形方法に関するもので、たとえば、特許第９２１９
３８号（特公昭５３−１４８５号）の斜流ファンに用い
るブレードの成形方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a blade for a mixed flow fan, for example, Japanese Patent No. 9219.
The present invention relates to a method for forming a blade used for a mixed flow fan of No. 38 (Japanese Patent Publication No. 53-1485).

【０００２】[0002]

【従来の技術】従来の斜流ファンの羽根車は、単板羽根
か、あるいは高効率化のため、エアーホイル（翼形）を
採用している。2. Description of the Related Art The impeller of a conventional mixed flow fan employs a single plate blade or an air wheel (airfoil) for high efficiency.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、上記従
来のエアーホイルは、軽合金の鍛造品であるため、非常
に重く、リングをつけた状態に鍛造をすることができ
ず、リングなしのブレードの羽根車に合わせたケーシン
グを必要とし、羽根車のバランスもとり難いなど、種々
の問題点があった。However, since the above-mentioned conventional air foil is a forged product of a light alloy, it is very heavy and cannot be forged in a state with a ring attached. There are various problems such as the need for a casing that matches the impeller and the difficulty of balancing the impeller.

【０００４】本発明は、上記のような問題点を解決しよ
うとするものである。すなわち、本発明は、簡単な工法
でエアーホイルを形成することができて、軽量化、高効
率化、低騒音化を図ることができる斜流ファン用ブレー
ドの成形方法を提供することを目的とするものである。The present invention is intended to solve the above problems. That is, an object of the present invention is to provide a method for forming a blade for a mixed flow fan, which is capable of forming an air foil by a simple construction method, and which is capable of achieving weight reduction, high efficiency, and low noise. To do.

【０００５】[0005]

【課題を解決するための手段】上記目的を達成するため
に、本発明の斜流ファン用ブレードの成形方法は、ブレ
ード１枚を展開した大きさの金属平板材料を、ディスク
およびリングに隙間なく溶接できるように展開したディ
スク側弧状辺とリング側弧状辺とを有する展開形状に切
断してブレード板材を得る切断工程と、前記ブレード板
材のディスク側弧状辺の中央部とリング側弧状辺の中央
部とを結ぶ直線を基準にして湾曲面を有するように該ブ
レード板材を押圧してブレード素材にする押圧工程と、
該ブレード素材の前記湾曲面が中空翼形の先端部となる
ようにしてその翼形の前縁と背面とを成形して該前縁の
端部と背面の端部が僅かに離れている端部未着中空ブレ
ードにする曲げ工程と、該端部未着中空ブレードの前記
両端部を仮溶接して仮止めブレードにする仮止め工程
と、該仮止めブレードの仮止めされている全端部を本溶
接して中空ブレードにする溶接工程とからなる。In order to achieve the above object, in the method for forming a blade for a mixed flow fan of the present invention, a flat metal plate material having a size in which one blade is developed is provided on a disk and a ring without a gap. A cutting step of obtaining a blade plate material by cutting into a developed shape having a disc side arcuate side and a ring side arcuate side that have been developed so that they can be welded, and a central portion of the disk side arcuate side of the blade plate material and a center of the ring side arcuate side A pressing step of pressing the blade plate material into a blade material so as to have a curved surface with reference to a straight line connecting the section,
An end in which the front edge and the back surface of the airfoil are formed such that the curved surface of the blade material is the tip of a hollow airfoil, and the end of the front edge and the end of the back surface are slightly apart from each other. Partial unbonded hollow blade bending step, temporary fixing step of temporarily welding the both ends of the end unbonded hollow blade to temporarily fix the blade, and all temporarily fixed ends of the temporary fix blade Of the main welding to form a hollow blade.

【０００６】[0006]

【作用】本発明によれば、ブレード１枚を展開した大き
さの金属平板材料を、ディスクおよびリングに隙間なく
溶接できるように展開した形状に切断してブレード板材
を得る切断工程と、前記ブレード板材の中央部に湾曲面
を有するように該ブレード板材を押圧してブレード素材
にする押圧工程と、該ブレード素材の湾曲面が翼形の先
端部となるようにしてその翼形の前縁と背面とを成形し
て該前縁の端部と背面の端部が僅かに離れている端部未
着中空ブレードにする曲げ工程と、該端部未着中空ブレ
ードの前記両端部を仮溶接して仮止めブレードにする仮
止め工程と、該仮止めブレードの仮止めされている全端
部を本溶接して中空ブレードにする溶接工程とからなる
ので、簡単な工法でエアーホイルを形成することができ
て、軽量化、高効率化、低騒音化を図ることができる。According to the present invention, a cutting step for obtaining a blade plate material by cutting a flat metal plate material having a size obtained by expanding one blade into a shape expanded so that it can be welded to a disk and a ring without a gap; A pressing step of pressing the blade plate material into a blade material so as to have a curved surface in the central portion of the plate material, and a leading edge of the airfoil so that the curved surface of the blade material becomes the tip of the airfoil. A bending step of forming a back surface into an end-unattached hollow blade in which the end of the front edge and the end of the back surface are slightly apart from each other, and temporarily welding the both ends of the end-unattached hollow blade. Forming a temporary fixing blade, and a welding step of main welding all temporarily fixed ends of the temporary fixing blade to form a hollow blade, so that the air foil can be formed by a simple construction method. Can be made, lightweight, high efficiency Reduction, it is possible to reduce the noise.

【０００７】[0007]

【実施例】図１は本発明方法の一実施例によつて得られ
たブレードを取付けた斜流ファンの一部切欠側面図であ
る。図１において、１は後述する中空ブレード、２はリ
ング、３はディスク、４はケーシング、５はベルマウ
ス、６はガイドベ−ン、７は発生した風の流れ方向を示
した矢印である。FIG. 1 is a partially cutaway side view of a mixed flow fan with blades obtained according to an embodiment of the method of the present invention. In FIG. 1, 1 is a hollow blade described later, 2 is a ring, 3 is a disk, 4 is a casing, 5 is a bell mouth, 6 is a guide vane, and 7 is an arrow indicating the flow direction of the generated wind.

【０００８】つぎに、前記ブレード１の成形方法の一実
施例について、図２ないし図８により説明する。まず、
図２に示すように、ブレード１枚を展開した大きさに、
鋼板またはアルミ合金板を切断して金属平板材料１０を
得る。そして、図３に示すように、前述のディスク３お
よびリング２に隙間なく溶接できるように展開したディ
スク側弧状辺１３とリング側弧状辺１４とを有する展開
形状にプレスで切断してブレード板材１１を得る。また
前記ブレード板材１１のディスク側弧状辺１３の中央部
とリング側弧状辺１４の中央部とを結ぶ直線１５を基準
にして、湾曲面１８を有するように、図４に示すよう
に、押圧上金型１６と押圧下金型１７の間で押圧してブ
レード素材１２を成形する。Next, one embodiment of the method for molding the blade 1 will be described with reference to FIGS. First,
As shown in Fig. 2, in the size of one blade developed,
A flat plate material 10 is obtained by cutting a steel plate or an aluminum alloy plate. Then, as shown in FIG. 3, the blade plate material 11 is cut by a press into a developed shape having a disk-side arcuate side 13 and a ring-side arcuate side 14 which are developed so that they can be welded to the disk 3 and the ring 2 without any gaps. To get Further, as shown in FIG. 4, the curved surface 18 is formed on the basis of the straight line 15 connecting the central portion of the disk-side arcuate side 13 and the central portion of the ring-side arcuate side 14 of the blade plate member 11 as shown in FIG. The blade material 12 is formed by pressing between the mold 16 and the pressing lower mold 17.

【０００９】前記ブレード素材１２の湾曲面１８が、図
６に示すように、中空翼形の先端部２５となるようにし
てその翼形の前縁２６と背面２７とを成形して該前縁２
６の端部２８と背面２７の端部２９が僅かに離れている
（合わせ目の距離ｃ）端部未着中空ブレード２４に曲げ
る。すなわち、まず板材２０と丸棒２１を有するベンダ
上金型１９と凹曲面２３を有するベンダ下金型２２とを
用いて、ブレード素材１２の湾曲面１８を押圧して、適
度の曲率半径の翼形の先端部２５を成形する。このの
ち、前縁２６と背面２７を成形する。ここで、ベンダ上
金型１９は前記合わせ目の距離ｃが最小となるように、
なるべく厚みｔの小さい板材２０のものを使用する。つ
ぎに、図７に示すように、前縁２６の端部２８と背面２
７の端部２９をスポット溶接３１による仮止め加工によ
り仮止めブレード３０を得る。上記仮止め加工後に、前
記端部２８と２９の全縁を本溶接３２をし、図８に示す
ように、スポット加工の補強およびファン回転時に隙間
による音の発生や錆の発生などがないようにした中空ブ
レード１を得る。As shown in FIG. 6, the curved surface 18 of the blade blank 12 forms a hollow airfoil tip 25, and a leading edge 26 and a back surface 27 of the airfoil are molded to form the leading edge 26. Two
The end 28 of No. 6 and the end 29 of the back surface 27 are bent slightly to the end-unattached hollow blade 24 (distance c of the joint). That is, first, by using the upper bender die 19 having the plate member 20 and the round bar 21 and the lower bender die 22 having the concave curved surface 23, the curved surface 18 of the blade material 12 is pressed, and the blade having an appropriate radius of curvature. The tip 25 of the shape is molded. After this, the front edge 26 and the back surface 27 are molded. Here, in the upper die 19 of the vendor, the distance c of the joint is minimized,
The plate material 20 having the smallest thickness t is used. Next, as shown in FIG. 7, the end portion 28 of the front edge 26 and the back surface 2
The end 29 of 7 is temporarily fixed by spot welding 31 to obtain a temporary fixing blade 30. After the temporary fixing process, all the edges of the end portions 28 and 29 are subjected to main welding 32, and as shown in FIG. 8, reinforcement of spot processing and generation of noise and rust due to gaps during fan rotation are prevented. The hollow blade 1 is obtained.

【００１０】図８に示される完成した中空ブレード１の
５枚ないし８枚を、治具により適性な角度にディスク３
およびリング２に溶接することによって、図１に示した
中空ブレード１を有する斜流ファンが構成される。The finished hollow blade 1 shown in FIG. 8 is made to have 5 to 8 pieces thereof by a jig at an appropriate angle to the disk 3
And by welding to the ring 2, the mixed flow fan having the hollow blade 1 shown in FIG. 1 is constructed.

【００１１】このように、図２に示した金属平板材料１
０をブレードの展開形状に切断して図３に示したブレー
ド板材１１を得る切断工程と、図４に示したように、該
ブレード板材１１を押圧してブレード素材１２にする押
圧工程と、図５に示したように、先端部２５と前縁２６
と背面２７とを成形して、図６に示した端部未着中空ブ
レード２４得る曲げ工程と、図７に示したように、端部
２８と２９をスポット溶接３１によって仮止めする仮止
め工程と、図８に示したように、前記端部２８と２９を
本溶接３２をすることによって、中空ブレード１を完成
することができる。Thus, the flat metal plate material 1 shown in FIG.
A cutting step of cutting 0 into a developed shape of a blade to obtain a blade plate material 11 shown in FIG. 3, and a pressing step of pressing the blade plate material 11 into a blade material 12 as shown in FIG. 5, tip 25 and leading edge 26
And the back surface 27 are formed to bend the endless hollow blade 24 shown in FIG. 6 and a temporary fixing step of temporarily fixing the ends 28 and 29 by spot welding 31 as shown in FIG. Then, as shown in FIG. 8, the hollow blade 1 can be completed by performing the main welding 32 on the ends 28 and 29.

【００１２】[0012]

【発明の効果】以上説明したように、本発明によれば、
ブレード１枚を展開した大きさの金属平板材料を、ディ
スクおよびリングに隙間なく溶接できるように展開した
形状に切断してブレード板材を得る切断工程と、前記ブ
レード板材の中央部に湾曲面を有するように該ブレード
板材を押圧してブレード素材にする押圧工程と、該ブレ
ード素材の湾曲面が翼形の先端部となるようにしてその
翼形の前縁と背面とを成形して該前縁の端部と背面の端
部が僅かに離れている端部未着中空ブレードにする曲げ
工程と、該端部未着中空ブレードの前記両端部を仮溶接
して仮止めブレードにする仮止め工程と、該仮止めブレ
ードの仮止めされている全端部を本溶接して中空ブレー
ドにする溶接工程とからなるので、いずれの工程も複雑
なものはなく、全体としても容易であり、かつ、１枚の
金属平板材料から製作することができ、鍛造品とは異な
り、軽量であつて、羽根車に溶接した場合のバランスも
容易にとれ、軽量化はもちろんのこと、高効率化および
低騒音化を図ることができる。As described above, according to the present invention,
A cutting step for obtaining a blade plate material by cutting a flat metal plate material of a size in which one blade is developed into a developed shape so that it can be welded to a disk and a ring without a gap; and a curved surface at the central portion of the blade plate material. And a pressing step of pressing the blade plate material into a blade material, and forming the front edge and the back surface of the airfoil so that the curved surface of the blade material becomes the tip of the airfoil. Bending step to form an end-unattached hollow blade in which the end and the back end are slightly separated from each other, and a temporary fixing step in which the both ends of the end-unattached hollow blade are temporarily welded to form a temporary fixing blade. And, since it consists of a welding step of main welding all temporarily fixed ends of the temporary fixing blade to form a hollow blade, there is no complicated step in any of the steps, and it is easy as a whole, and, From a single flat metal plate material Can be created, unlike forged parts, shall apply lightweight, the balance in the case of welding the impeller easily take, lightweight, of course, it is possible to achieve high efficiency and low noise.

【図面の簡単な説明】[Brief description of drawings]

【図１】 本発明によって得られたブレードを使用して
いる斜流ファンの一部切欠側面図である。FIG. 1 is a partially cutaway side view of a mixed flow fan using a blade obtained according to the present invention.

【図２】 本発明方法を実施する原材料の１つである金
属平板材料を示した平面図である。FIG. 2 is a plan view showing a metal flat plate material which is one of raw materials for carrying out the method of the present invention.

【図３】 図２の金属平板材料を切断して得られたブレ
ード板材を示した平面図である。FIG. 3 is a plan view showing a blade plate material obtained by cutting the metal flat plate material of FIG.

【図４】 図３のブレード板材を押圧してブレード素材
を成形している押圧金型を示した正面断面図である。FIG. 4 is a front sectional view showing a pressing die that presses the blade plate material of FIG. 3 to form a blade material.

【図５】 図４のブレード素材をベンダで曲げ加工して
いる状態を示した一部断面正面図である。5 is a partial cross-sectional front view showing a state where the blade material of FIG. 4 is bent by a bender.

【図６】 図５の曲げ加工した後の端部未着中空ブレー
ドを示した正面図である。FIG. 6 is a front view showing the hollow blade with no end attached after bending in FIG.

【図７】 図６の端部未着中空ブレードの該端部をス
ポット溶接した仮止めブレードを示した斜視図である。7 is a perspective view showing a temporary fixing blade in which the end portion of the hollow blade not yet attached to the end portion of FIG. 6 is spot-welded.

【図８】 図７の仮止めブレードの両端部を本溶接した
中空ブレードを示した斜視図である。FIG. 8 is a perspective view showing a hollow blade in which both ends of the temporary fixing blade of FIG. 7 are main-welded.

【符号の説明】[Explanation of symbols]

１：中空ブレード ２：リング ３：ディスク １０：金属平板材料 １１：ブレード板材 １２：ブレード素材 １３：ディスク側弧状辺 １４：リング側弧状辺 １５：直線 １６：押圧上金型 １７：押圧下金型 １８：湾曲面 １９：ベンダ上金型 ２１：丸棒 ２２：ベンダ下金型 ２３：凹曲面 ２４：端部未着中空ブレード ２５：先端部 ２６：前縁 ２７：背面 ２８：前縁の端部 ２９：背面の端部 ３０：仮止めブレード ３１：スポット溶接 ３２：本溶接 1: Hollow blade 2: Ring 3: Disc 10: Flat metal plate material 11: Blade plate material 12: Blade material 13: Disc side arcuate side 14: Ring side arcuate side 15: Straight line 16: Pressing upper mold 17: Pressing lower mold 18: Curved surface 19: Vendor upper die 21: Round bar 22: Bender lower die 23: Concave curved surface 24: Hollow blade with no end 25: Tip 26: Front edge 27: Back 28: Edge of front edge 29: End of back surface 30: Temporary fixing blade 31: Spot welding 32: Main welding

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ０４Ｄ 29/62 Ｃ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display area F04D 29/62 C

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 ブレード１枚を展開した大きさの金属平
板材料を、ディスクおよびリングに隙間なく溶接できる
ように展開したディスク側弧状辺とリング側弧状辺とを
有する展開形状に切断してブレード板材を得る切断工程
と、前記ブレード板材のディスク側弧状辺の中央部とリ
ング側弧状辺の中央部とを結ぶ直線を基準にして湾曲面
を有するように該ブレード板材を押圧してブレード素材
にする押圧工程と、該ブレード素材の前記湾曲面が中空
翼形の先端部となるようにしてその翼形の前縁と背面と
を成形して該前縁の端部と背面の端部が僅かに離れてい
る端部未着中空ブレードにする曲げ工程と、該端部未着
中空ブレードの前記両端部を仮溶接して仮止めブレード
にする仮止め工程と、該仮止めブレードの仮止めされて
いる全端部を本溶接して中空ブレードにする溶接工程と
からなることを特徴とする、斜流ファン用ブレードの成
形方法。1. A blade formed by cutting a flat metal plate material of a size obtained by expanding one blade into a developed shape having a disk-side arcuate side and a ring-side arcuate side that are developed so that they can be welded to a disk and a ring without a gap. Cutting step to obtain a plate material, the blade plate material by pressing the blade plate material to have a curved surface based on a straight line connecting the center of the disk side arcuate side of the blade plate material and the center of the ring side arcuate side And the front edge and the back surface of the airfoil are formed such that the curved surface of the blade material is the tip of the hollow airfoil, and the edge of the front edge and the edge of the back surface are slightly A bending step to make the endless hollow blades apart from each other, a temporary fixing step to temporarily weld the both ends of the endless hollow blades to make a temporary fixing blade, and a temporary fixing of the temporary fixing blade. Weld all ends And forming a hollow blade by a welding process. 【請求項２】 曲げ工程にベンダを用い、丸棒を有する
上金型と凹曲面を有する下金型とでブレード素材の湾曲
面を成形することからなる請求項１記載の斜流ファン用
ブレードの成形方法。2. The blade for a mixed flow fan according to claim 1, wherein a curved surface of the blade material is formed by using a bender in the bending step and using an upper die having a round bar and a lower die having a concave curved surface. Molding method. 【請求項３】 仮止め工程の仮溶接がスポット溶接によ
る請求項１または２記載の斜流ファン用ブレードの成形
方法。3. The method for forming a blade for a mixed flow fan according to claim 1, wherein the temporary welding in the temporary fixing step is spot welding.
JP4154004A 1992-04-30 1992-04-30 Method of forming blade for mixed flow fan Expired - Lifetime JPH0741338B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4154004A JPH0741338B2 (en) 1992-04-30 1992-04-30 Method of forming blade for mixed flow fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4154004A JPH0741338B2 (en) 1992-04-30 1992-04-30 Method of forming blade for mixed flow fan

Publications (2)

Publication Number Publication Date
JPH05305376A true JPH05305376A (en) 1993-11-19
JPH0741338B2 JPH0741338B2 (en) 1995-05-10

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6132826A (en) * 1996-10-14 2000-10-17 Daikin Industries, Ltd. Method of manufacturing hollow blade and hollow blade manufactured by same
JP2001349297A (en) * 2000-06-06 2001-12-21 Fuji Industrial Co Ltd Turbofan for range hood, and range hood containing the turbofan
EP1588024A2 (en) * 2003-01-06 2005-10-26 Mechanization Systems Company, Inc. Cooling fan with reinforced blade
JP2007083260A (en) * 2005-09-20 2007-04-05 Kikukawa Kogyo Kk Apparatus for working metallic sheet, and method for manufacturing blade for wind mill using the same
JP2011032991A (en) * 2009-08-05 2011-02-17 Showa Furyoku Kikai Kk Mixed flow fan including airfoil blade
CN103429780A (en) * 2011-03-01 2013-12-04 斯奈克玛 Method for producing a metal component such as a turbomachine blade reinforcement
CN103567727A (en) * 2013-11-06 2014-02-12 浙江金盾风机股份有限公司 Manufacturing process for wing-type high temperature resistant steel plate welded blades
JP2014525838A (en) * 2011-08-05 2014-10-02 ヴォッベン プロパティーズ ゲーエムベーハー Forming method for hot forming of steel sheet for rotor blades to be manufactured by a wind turbine generator
CN104797825A (en) * 2013-05-10 2015-07-22 Lg电子株式会社 Method for producing centrifugal fan
CN105057412A (en) * 2015-08-24 2015-11-18 江苏中海重型机床有限公司 Equal-height adjusting device for bending machine and bending machine
CN105773085A (en) * 2016-04-26 2016-07-20 杭州中水科技股份有限公司 Numerical control machining method of twisted blade-type workpiece
US9995311B2 (en) 2013-05-10 2018-06-12 Lg Electronics Inc. Centrifugal fan
CN112621140A (en) * 2020-12-08 2021-04-09 重庆江东机械有限责任公司 Steam turbine hollow stationary blade hydro-forming process

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6018243A (en) * 1983-07-12 1985-01-30 Daikin Ind Ltd Production of hollow vane
JPS6411380A (en) * 1987-07-03 1989-01-13 Nissin Electric Co Ltd Manufacture of josephson element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6018243A (en) * 1983-07-12 1985-01-30 Daikin Ind Ltd Production of hollow vane
JPS6411380A (en) * 1987-07-03 1989-01-13 Nissin Electric Co Ltd Manufacture of josephson element

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6132826A (en) * 1996-10-14 2000-10-17 Daikin Industries, Ltd. Method of manufacturing hollow blade and hollow blade manufactured by same
JP2001349297A (en) * 2000-06-06 2001-12-21 Fuji Industrial Co Ltd Turbofan for range hood, and range hood containing the turbofan
EP1588024A2 (en) * 2003-01-06 2005-10-26 Mechanization Systems Company, Inc. Cooling fan with reinforced blade
EP1588024A4 (en) * 2003-01-06 2007-03-14 Delta T Corp Cooling fan with reinforced blade
JP2007083260A (en) * 2005-09-20 2007-04-05 Kikukawa Kogyo Kk Apparatus for working metallic sheet, and method for manufacturing blade for wind mill using the same
JP2011032991A (en) * 2009-08-05 2011-02-17 Showa Furyoku Kikai Kk Mixed flow fan including airfoil blade
CN103429780A (en) * 2011-03-01 2013-12-04 斯奈克玛 Method for producing a metal component such as a turbomachine blade reinforcement
JP2014525838A (en) * 2011-08-05 2014-10-02 ヴォッベン プロパティーズ ゲーエムベーハー Forming method for hot forming of steel sheet for rotor blades to be manufactured by a wind turbine generator
CN104797825A (en) * 2013-05-10 2015-07-22 Lg电子株式会社 Method for producing centrifugal fan
CN104797825B (en) * 2013-05-10 2017-06-30 Lg电子株式会社 The manufacture method of centrifugal fan
US9995311B2 (en) 2013-05-10 2018-06-12 Lg Electronics Inc. Centrifugal fan
US10662968B2 (en) 2013-05-10 2020-05-26 Lg Electronics Inc. Method of manufacturing centrifugal fan
CN103567727A (en) * 2013-11-06 2014-02-12 浙江金盾风机股份有限公司 Manufacturing process for wing-type high temperature resistant steel plate welded blades
CN103567727B (en) * 2013-11-06 2016-01-06 浙江金盾风机股份有限公司 A kind of manufacturing process of airfoil type high temperature resistant steel plate welding blade
CN105057412A (en) * 2015-08-24 2015-11-18 江苏中海重型机床有限公司 Equal-height adjusting device for bending machine and bending machine
CN105773085A (en) * 2016-04-26 2016-07-20 杭州中水科技股份有限公司 Numerical control machining method of twisted blade-type workpiece
CN112621140A (en) * 2020-12-08 2021-04-09 重庆江东机械有限责任公司 Steam turbine hollow stationary blade hydro-forming process

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