EP0728545A2 - Outil d'aide à la coulée une roue à aubes - Google Patents

Outil d'aide à la coulée une roue à aubes Download PDF

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Publication number
EP0728545A2
EP0728545A2 EP96102495A EP96102495A EP0728545A2 EP 0728545 A2 EP0728545 A2 EP 0728545A2 EP 96102495 A EP96102495 A EP 96102495A EP 96102495 A EP96102495 A EP 96102495A EP 0728545 A2 EP0728545 A2 EP 0728545A2
Authority
EP
European Patent Office
Prior art keywords
guide
curve
tool
blade
segment
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.)
Withdrawn
Application number
EP96102495A
Other languages
German (de)
English (en)
Other versions
EP0728545A3 (fr
Inventor
Heinz Dipl.-Ing. Hofmeister
Werner Dipl.-Ing. Reichle
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.)
Rolls Royce Solutions GmbH
Original Assignee
MTU Friedrichshafen GmbH
MTU Motoren und Turbinen Union Friedrichshafen GmbH
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 MTU Friedrichshafen GmbH, MTU Motoren und Turbinen Union Friedrichshafen GmbH filed Critical MTU Friedrichshafen GmbH
Publication of EP0728545A2 publication Critical patent/EP0728545A2/fr
Publication of EP0728545A3 publication Critical patent/EP0728545A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/02—Lost patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C23/00—Tools; Devices not mentioned before for moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art

Definitions

  • the invention relates to a tool for producing a blade wheel of a turbomachine with curved blades, with the features mentioned in the preamble of claim 1.
  • blades of flow machines such as fan wheels, turbine wheels or compressor wheels of a radial turbocompressor
  • the casting process or the investment casting process is usually used as the casting process suitable for producing these complicated paddle wheels.
  • Stator and impellers of turbomachines are also manufactured using the sand casting process, with the form mask process according to croning being used in many cases.
  • machining can also be used.
  • fan and compressor wheels made of aluminum and titanium materials are also manufactured using five-axis milling.
  • more wear-resistant materials such as. B. steel materials are processed, the production of these wheels by five-axis milling becomes so expensive that the use of these methods is practically impossible.
  • the casting technology production options are largely limited to precision casting or fine injection molding processes.
  • the reasons for this are the one-piece construction of the wheels, which is essential for operational dynamics reasons, and the wheel materials to be selected due to the high thermal load.
  • the known casting processes practically only the lost wax process is suitable for producing such paddle wheels.
  • investment casting molds which can withstand these high temperatures of the molten metal must also be used here. Such investment casting molds can only be produced with the help of a model.
  • Such a model consists of special molded wax and corresponds exactly to the casting to be produced with regard to its geometric dimensions. To However, the shrinkage dimensions required for casting are to be taken into account here.
  • the model is surrounded on all sides by the molding material and initially remains in the casting mold after the compression of the molding material.
  • the wax model is released from the mold shell in an autoclave, thereby freeing voids in the mold that correspond to the casting.
  • the molds are poured off, the cavities are filled by the hot molten metal, so that after the melt has solidified in the casting mold, the finished casting can be formed.
  • This known model device consists of several complementary shape segments which, when put together, form the tool for the wax model.
  • the number of segments corresponds to the number of blades of the turbine wheel, the segments being slidably fixed on a flat transport mechanism.
  • the transport mechanism brings the mold segments together in a linear movement essentially centrally or tangentially in the direction of the hub of the turbine wheel when the tool is closed.
  • the segments are surrounded in the circumferential direction by a split ring which, as a molded part, defines the outer contour of the blades.
  • the tool is delimited in the axial direction by a counterplate, which specifies the rear hub contour of the turbine wheel and at the same time fixes the shaped segments in their combined position.
  • the known transport mechanism essentially consists of a carrier plate with which a tension plate and a cam plate are connected one above the other, arranged on a common axis.
  • the cam disc is fixed to the support plate in a rotationally fixed manner, while the tension disc arranged between the support plate and the cam disc can be rotated about the common axis.
  • grooves are formed on the rotatable pulling disk in accordance with the number of shaped segments, which extend spirally outwards.
  • the fixed cam plate has slot-shaped recesses, which are designed to run radially tangentially to the wheel hub in the direction of the disk circumference. The number of recesses also corresponds the number of shape segments.
  • Each of the segments lies flat on the cam disc and has a slot nut that starts from the contact surface and is connected to it.
  • the cross section of the slot nut is matched to this recess in the cam plate over a length section of the recess and projects through it into a groove of the tension plate underneath. While this sliding block, which can be displaced with a precise fit, is guided in the recess of the cam plate, the free end of the sliding block protruding into the spiral groove of the tension plate follows the course of this groove when the tension plate is rotated relative to the cam plate.
  • the slot nut is inhibited in its movement in the circumferential direction and is displaced along the recess when the tension disk is rotated. Simultaneously with the sliding block, the segment connected to this describes a linear displacement movement.
  • paddle wheels with curved blades still have to be manufactured with the aid of correspondingly complicated tools which are composed of several individual molded parts.
  • Such tools made up of several parts or individual segments, however, have dimensional inaccuracies due to division errors, or the manufacturing costs of the correspondingly dimensionally stable and precisely fitting parts are very high.
  • the careful assembly of such individual molded parts to form the tool is very labor-intensive and cost-intensive, since the loose parts are manually removed from the cast wax model due to the complex blade geometry, by rotating, lifting off and simultaneously pulling them off.
  • the invention is based on the technical problem of creating a tool with which paddle wheels with spatially curved surfaces can be produced simply and inexpensively with high dimensional accuracy.
  • a tool with a transport mechanism in which all of the blade gaps between blade wheels, the angle of which between the leading and trailing edge of a blade multiplied by the number of blades result in an angle greater than 360 degrees, can be formed in one operation.
  • all of the vane space segments despite the complicated vane geometry, describe a flat movement.
  • the transport mechanism can be designed in a simple manner and can be represented with little construction effort.
  • the planar guidance of the shape segments on the cam plate increases the exact movement of the shape segments out of the three-dimensionally shaped areas between the individual blades, so that damage to the spatially curved blade contour can be reliably avoided.
  • the advantageous kinematics of the transport mechanism according to the invention are of particular importance.
  • the additional guide element provided according to the invention on each shaped segment opens up an additional degree of freedom for the movement of the shaped segment compared to previously known shaping mechanisms.
  • each segment of the tool according to the invention can also perform a relative movement about its vertical axis.
  • a rotational movement is superimposed on the translational movement of the segments, which is absolutely necessary in order to lead the blade gap shaped segments out of the tool without damaging the blade contour can.
  • the depiction of such a multi-layered molding movement of the mold segments was previously unknown and, moreover, the reason why, for example, the wax models of radial compressor wheels could only be produced by elaborate individual demolding of the blade gaps by means of master molds.
  • FIG. 1 shows a tool 1 according to the invention for producing a radial compressor wheel 20 using the lost wax investment casting process.
  • This tool 1 serves as a model device for producing a wax model of the radial compressor impeller 20 shown in FIG. 4.
  • the blading of the compressor wheel 20 consists of 6 full blades 22 and a further 6 splitter blades 21 cast between two adjacent full blades 22.
  • Full blades 22 and splitter blades 21 are arranged at equal angular intervals, with both the full blades 22 and the splitter blades 21, that is to say their root line 27, are positively curved ( ⁇ ⁇ 90 degrees).
  • the blades 21 and 22 are also curved in the axial flow direction. This axial blade curvature is less on the outlet side and more clearly in the wheel hub area.
  • the spatial curvature thus provided for the geometry of the blades 21, 22 implemented on the radial compressor blade wheel 20 is specifically described in that the angle 24 between the leading edge 26 and the trailing edge 25 of the solid blades 22 multiplied by the number of solid blades 22 results in an angle greater than 360 degrees.
  • This geometric specification thus also characterizes the spatial design of the vane channels, and in particular, the curvature of the channel in the circumferential direction. This curvature is thus fixed to a minimum, at which it is no longer possible to simply pull out the blade space segments 5. This is where the invention comes in, which proposes the tool shown in FIGS. 1 to 3 for producing the radial compressor impeller 20 described.
  • the tool 1 is constructed essentially rotationally symmetrically and is composed of several parts.
  • the individual parts of the tool 1 can be distinguished in a very general way into the actual molded parts 2, 3, 4, which represent the casting contour, and into parts of a transport mechanism 30 for blade space-shaped segments 5.
  • twelve of these vane space mold segments 5 are mounted on the transport mechanism 30.
  • the number of blade gap shape segments 5 corresponds to the number of blades 21, 22 of the radial compressor impeller 20.
  • Each of these blade space-shaped segments 5 consists of a segment foot 14 and a blade contour shape 15, 16 integrally molded thereon.
  • the segment feet 14 each have the outline of a circular sector, the side surfaces 34, 35 of which are curved in the circumferential direction.
  • the curvature of these custom-fit side surfaces 34, 35 corresponds to the curvature of the blade root line 25, while the radial side surfaces 36, 37 of the segment feet 14 complement each other to form cylindrical outer surfaces.
  • the intermediate shape segments 5 are designed to be complementary to one another and, in the assembled position A, together form a type of mold core for the blade intermediate spaces 23 which are later to be provided on the radial compressor wheel 20 the twelve segment feet 14 form an annular disk whose inner hole diameter is equal to the diameter of the tool hub 28.
  • a stop pin 17 is inserted into the tool hub opening and screwed to the transport mechanism.
  • the cylindrical circumferential surface of this stop bolt 11 forms the end position A for the blade space-shaped segments 5 when the mold 1 is closed.
  • the mold core formed by the blade gap mold segments 5 comprises a split ring 4 in the radial direction.
  • the mold ring 4 defines the blade wheel outer contour and is divided along its diameter into two half-ring parts, each of which is fitted precisely onto the outer peripheral surface of the base plate.
  • the divided ring 4 forms along its outer peripheral surface a clamping surface 50 which tapers conically in the direction away from the transport mechanism 30 and onto which a fixing ring 3 provided with a conical clamping surface 52 of opposite design is pushed. Due to the conical clamping surfaces 50, 52 and the force component thus generated in the radial direction, this clamps the split ring 4 against the blade-space mold segments 5 and thus fixes the mold parts 4, 5 in their position.
  • the tool 1 is closed in the axial direction on the side facing away from the transport mechanism 30 by a counter plate 2.
  • the counter plate 2 forms the rear hub contour of the compressor wheel 20 and lies on the divided ring 4 along a circular contact surface. In this position, it simultaneously holds down the fixing ring 3 and thus clamps the molded parts 3, 4, 5 in the axial direction onto the transport mechanism 30.
  • the transport mechanism 30 of the blade space mold segments 5 is shown in FIGS. 2 and 3.
  • a tension plate 7 and a cam plate 8 are arranged flat on top of one another on a support plate 6 on a common axis 54, which is also the central axis of the tool 1.
  • a circular cylindrical recess 31 is formed on the carrier plate 6, in which the tension plate 7 is received. Radially outward from the recess 31 there remains an edge 32 of the carrier plate 6, which forms a support for the cam disc 8, which is fixed on the latter in a rotationally fixed manner.
  • the edge 32 protrudes slightly in the axial direction beyond the tension disk 7 inserted into the recess 31, so that the tension disk 7 is mounted between the carrier plate 6 and the cam disk 8 and can be rotated about the common axis 54.
  • a suitable handling part 33 is attached to the circumference in the radial direction on the tension plate 7 and can be in a recess in the edge 32 an angular range 38 are moved.
  • the recess is provided at least over an angular range which corresponds to the angle of rotation of the tension plate 7 between the closed tool (position A) and the mold 1 in the shaped position B.
  • traction sheave 7 there are a total of twelve traction slots 9 running from the sheave axis 54 to the circumference so that when the twist is rotated the force component for opening the segments 5 is directed in the longitudinal direction of the guide curve 10 on the cam 8. All traction slots 9 begin on a common circular line at a radial distance from the hub opening 28 and also end on a common circular line, the radius of which is smaller than the radius of the traction sheave 7.
  • the traction slots 9 are milled into the washer 7 by means of a end mill, the diameter of which is equal to that Width of the cylinder slots 9 is. As a result, the traction slots 9 are delimited by mutually parallel flanks 39, 40 in the direction of rotation of the traction sheave.
  • the cam disk 8 which is arranged above the tension disk 7 and connected to the carrier plate 6 in a rotationally fixed manner, likewise has twelve guide curves 10, which essentially extend outward from the cam disk center and are milled into the cam disk 8 as recesses.
  • the course of the guide curves 10 in the cam disc 8 corresponds to the blade geometry in the radially inner section of an Archimedean spiral with a center on the axis 26 of the tool 1 due to the law of formation.
  • the guide curve 10 changes the curvature in the outer section in such a way that the freeing out of the individual blade gap shape segments 5 is ensured by means of two-point guidance 11, 12 and guide curve profile 10 during molding.
  • the number of guide curves 10 and the traction slots 9 is not necessarily limited to twelve, but rather corresponds to the number of blade gap shape segments 5 and thus depends on the number of blades of the blade wheel to be produced.
  • the guide curves 10 and the pull slots 9 are curved in the opposite circumferential direction, each guide curve 10 of the cam plate 8 being assigned an underlying pull slot 9, and thus the cam plate 8 and the pull plate 4 cooperatively effect a transport movement.
  • each pull slot 9 to a selected guide curve 10 is carried out with the aid of a transport bolt 11.
  • the transport bolt 11 is firmly connected to the blade gap shape segment 5, for example, in the present case Embodiment screwed a free end of the transport bolt 11 in segment 5.
  • the free length of the transport bolt 11 passes through a guide curve 10 of the cam plate 8 and projects into the corresponding traction slot 9 of the traction sheave 7 therewith.
  • the transport bolt 11 thus forms an intersection of the traction slot profile and the guide curve profile.
  • the movement of the transport bolt 11 is determined by this coupling of the two courses to one another. In the manner of a link guide, this occurs when the intersection of the two courses moves as soon as the tension disk 7 is rotated relative to the cam disk 8. Since the cam 8 is now considered to be stationary, the transport bolt moves in the direction of the guide curve 10 when the tension disk 7 moves in the direction 41 and thereby follows the course of the tension slot 9 in the direction of the cam disk circumference. In the opposite direction of rotation 42, it is moved in the opposite direction back to the center of the cam 8.
  • the cam plate 8 acts as a link guide and the rotatable tension plate 7 as a drive for the transport bolt 11 of the transport mechanism 30.
  • the transport bolt 11 itself, or its free length, has two longitudinal sections 11a, 11b between which a circumferential collar 13 is formed in the axial direction. While the collar 13 has a larger diameter than the width of the guide curve 10, the guide curve 10 and the length section 11a are matched to one another with a precise fit. The choice of the manufacturing tolerances of this pair of guides 10, 11 determines the dimensional accuracy of the movement of the mold segments 5.
  • An essential feature of the invention is that the lines created in the pairing of the transport bolt 11 / guide curve 10 along a generatrix of the transport bolt 11. Because only the smallest possible contact surface in the longitudinal direction of the guide curve 10 ensures that the transport bolt 11 does not jam in the guide curve 10 or wedged. Furthermore, this ensures that the shaped segment 5 can perform a rotary movement about its longitudinal axis despite the transport bolt 11 firmly connected to it.
  • a driving element with a planar guide can be provided, but this driving element must be anchored in the mold segment 5 so as to be rotatable about its longitudinal axis, in order thereby to ensure the rotatability of the mold segment 5 on the cam plate 8.
  • the collar 13 adjoins the length section 11a.
  • the axial distance between the collar 13 corresponds to the thickness of the cam plate 8, which it engages behind on both sides of the flanks 39, 40 of the guide curves 10 and thus fixes the transport bolt 11 in the axial direction.
  • the mold segment 5 is bound to the transport mechanism 30 in such a way that it can only execute flat movements on the cam 8.
  • the collar 13 slides on an axial annular surface on a recess 31, which is formed between the cam 8 and the tension plate 7 in the cam 8, on both sides of the guide curve 10 with the collar thickness of corresponding depth.
  • An insertion opening 29 enables individual mold segments 5 to be easily removed from the transport mechanism 30 in the molding position B without the latter being partially disassembled, i. H. the cam 8 must be unscrewed and loosened.
  • this insertion opening is designed in each case at the radially outer end of the guide curves 10 in a shape and size which allows the collar 13 to be inserted into the guide curve 10.
  • the free length section 11b of the transport bolt 11 projects into the pull slot 9 of the pull plate 7. Its diameter is also equal to the width of the pull slot 9, but runs Length section 11b with slight play in slot 9.
  • the driving force is the force component in the radial direction exerted by the traction sheave turn 41, 42 by the traction slot flanks 39, 40 on the transport bolt length section 11b.
  • This radial component is thanks to the spiral shape of the traction slots 9 the entire displacement area 38 between the closed position A and the molding position B.
  • a guide bolt 12 is provided for each blade gap mold segment 5, which is provided in the direction of displacement of the mold segment 5 facing the hub 28 at a distance 43 from the transport bolt 11 on the mold segment 5 (FIG. 1).
  • the free end of the guide pin 12 thus projects into the same guide curve 10 as the transport pin 11 and is guided by it.
  • the arrangement with a distance 43 between the transport pin 11 and the guide pin 12 makes it possible, together with the line contact between the conveyor pin 12 and the guide curve 10 described above, to superimpose a rotary movement on the displacement movement of the mold segment 5.
  • the guide pin 12 on the side of the transport pin 11 facing the tool hub.
  • the transport bolt 11 and the guide bolt 12 can also be interchanged in their arrangement on the segment 5.
  • the molding movement carried out according to the invention by the molding segment 5 is predetermined by the course of the guide curve 10.
  • the one-dimensional guidance of the transport bolt 11 and the guide bolt 12 and the distance 43 between them enables both bolts 11, 12 at the same time or at a specific position of the mold segment 5 on the cam plate 8, in each case at different points on the guide curve 10 and therefore run through different curve sections.
  • the course of the guide curve 10 is composed of the curvature course of the Archimedean spiral of the blade root line 27 with an inconsistent curve course Im the curvature is changed over a turning point 44 near the circumference.
  • the superimposition of several path courses to the final guide curve 10 according to the invention is necessary because of the design of the blade gap shape segments 5.
  • a guide corresponding to the blade root line 27 would be sufficient for moving the segment feet 14 apart and bringing them together, but it is absolutely necessary for the blade contour molded parts 15 formed on the segment feet to additionally rotate the segments 5 in order to move them in a plane movement from the complex ones To be able to wind out the spaces between the blades.
  • the casting or spraying process for the production of wax models can be automated if necessary with the aid of the tool according to the invention.
  • appropriately automated merging of the loose molded parts 2, 3, 4 for the model and a suitable removal or ejection mechanism inexpensive series production of models is also possible.
  • the tool 1 is not limited exclusively to the production of wax or similar model bodies, but can also be used directly as a casting or injection mold for metallic materials with a suitable choice of material and casting stress.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Supercharger (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP96102495A 1995-02-22 1996-02-20 Outil d'aide à la coulée une roue à aubes Withdrawn EP0728545A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995106145 DE19506145C1 (de) 1995-02-22 1995-02-22 Werkzeug für die gießtechnische Herstellung eines Schaufelrades
DE19506145 1995-02-22

Publications (2)

Publication Number Publication Date
EP0728545A2 true EP0728545A2 (fr) 1996-08-28
EP0728545A3 EP0728545A3 (fr) 1998-04-01

Family

ID=7754749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96102495A Withdrawn EP0728545A3 (fr) 1995-02-22 1996-02-20 Outil d'aide à la coulée une roue à aubes

Country Status (2)

Country Link
EP (1) EP0728545A3 (fr)
DE (1) DE19506145C1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007010181A2 (fr) * 2005-07-19 2007-01-25 Cummins Turbo Technologies Limited Procede et appareil permettant de fabriquer une turbine ou des roues de compresseur
US8702394B2 (en) 2001-06-06 2014-04-22 Borgwarner, Inc. Turbocharger including cast titanium compressor wheel
CN105344935A (zh) * 2015-12-03 2016-02-24 中国南方航空工业(集团)有限公司 一种闭式叶轮蜡模制造方法
CN106238705A (zh) * 2016-08-11 2016-12-21 山东豪迈机械科技股份有限公司 大型薄壁叶轮制造方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005116454A1 (fr) * 2004-05-28 2005-12-08 Hmy, Ltd. Turbine pour compresseur et procédé de fabrication de celle-ci
CN104475689B (zh) * 2014-12-19 2016-08-24 中国南方航空工业(集团)有限公司 封闭式离心叶轮蜡型成型装置
CN105880471B (zh) * 2016-07-01 2017-11-24 福建立松金属工业有限公司 一种叶轮蜡模制造方法及其模具
CN106862485B (zh) * 2017-02-22 2019-03-12 江苏汤臣汽车零部件有限公司 一种载重汽车液力缓速器叶轮蜡模加工***
CN107243596B (zh) * 2017-05-10 2019-08-06 中国航发南方工业有限公司 用于闭式离心叶轮精铸的蜡模模具及蜡模制造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1806757A1 (de) * 1968-11-02 1970-05-21 Suval S A S Die Manlio E Rag A Verfahren zur Herstellung von einstueckigen Pumpenfluegelraedern aus thermoplastischem Werkstoff,Form zur Durchfuehrung des Verfahrens und nach diesem Verfahren hergestellte Pumpenfluegelraeder
GB2067441A (en) * 1981-01-09 1981-07-30 Nissan Motor Pressure die casting method and apparatus for production of rotor having radial vanes
JPS59232810A (ja) * 1983-06-15 1984-12-27 Toyota Motor Corp 羽根車模型成形金型

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118774C2 (de) * 1991-06-07 1995-09-07 Schaeffler Waelzlager Kg Formwerkzeug zum Herstellen eines Lauf- oder Leitrades einer Radialpumpe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1806757A1 (de) * 1968-11-02 1970-05-21 Suval S A S Die Manlio E Rag A Verfahren zur Herstellung von einstueckigen Pumpenfluegelraedern aus thermoplastischem Werkstoff,Form zur Durchfuehrung des Verfahrens und nach diesem Verfahren hergestellte Pumpenfluegelraeder
GB2067441A (en) * 1981-01-09 1981-07-30 Nissan Motor Pressure die casting method and apparatus for production of rotor having radial vanes
JPS59232810A (ja) * 1983-06-15 1984-12-27 Toyota Motor Corp 羽根車模型成形金型

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 111 (M-379), 15.Mai 1985 & JP 59 232810 A (TOYOTA JIDOSHA KK), 27.Dezember 1984, *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8702394B2 (en) 2001-06-06 2014-04-22 Borgwarner, Inc. Turbocharger including cast titanium compressor wheel
WO2007010181A2 (fr) * 2005-07-19 2007-01-25 Cummins Turbo Technologies Limited Procede et appareil permettant de fabriquer une turbine ou des roues de compresseur
WO2007010181A3 (fr) * 2005-07-19 2007-08-16 Cummins Turbo Tech Ltd Procede et appareil permettant de fabriquer une turbine ou des roues de compresseur
US8464777B2 (en) 2005-07-19 2013-06-18 Cummins Turbo Technologies Limited Method and apparatus for manufacturing turbine or compressor wheels
CN105344935A (zh) * 2015-12-03 2016-02-24 中国南方航空工业(集团)有限公司 一种闭式叶轮蜡模制造方法
CN106238705A (zh) * 2016-08-11 2016-12-21 山东豪迈机械科技股份有限公司 大型薄壁叶轮制造方法

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Publication number Publication date
EP0728545A3 (fr) 1998-04-01
DE19506145C1 (de) 1995-12-07

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