EP2554297A2 - Wind turbine component having a lightweight structure - Google Patents
Wind turbine component having a lightweight structure Download PDFInfo
- Publication number
- EP2554297A2 EP2554297A2 EP12178868A EP12178868A EP2554297A2 EP 2554297 A2 EP2554297 A2 EP 2554297A2 EP 12178868 A EP12178868 A EP 12178868A EP 12178868 A EP12178868 A EP 12178868A EP 2554297 A2 EP2554297 A2 EP 2554297A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- metallic
- foam
- mold cavity
- wind turbine
- metallic foam
- 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- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/02—Casting in, on, or around objects which form part of the product for making reinforced articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
Definitions
- the subject matter disclosed herein relates generally to a wind turbine component and, more particularly, to a wind turbine component having a lightweight structure.
- Wind turbine powertrain components are often subject to large vibrational stresses. These vibrations can lead to premature failure of powertrain components and significant noise generation.
- a wind turbine component having a lightweight structure includes a metallic matrix defining a cavity, metallic foam enclosed within the cavity and a solidification metallurgical bond formed at an entire interface between the metallic matrix and the metallic foam.
- a vibration damping noise reduction lightweight structure for use as a multi-ton component of various types of apparatuses. These apparatuses may include, for example, wind turbines and similar components of power generation plants.
- the lightweight structure may include, for example, hollow tubing and/or castings of metallic materials filled by foams of metallic materials with a solidification metallurgical bond formed at an entire interface between the metallic materials and the foams.
- the lightweight structure 10 includes a metallic matrix 20 formed to define a cavity 21, metallic foam 30 enclosed within the cavity 21 and a solidification metallurgical bond 40.
- the metallic matrix 20 may include any metal or metal alloy, such as, for example, aluminum, magnesium, iron, nickel, titanium, cobalt, copper, chromium and alloys thereof.
- the metallic foam 30 may similarly include any metal or metal alloy, such as, for example, aluminum, magnesium, iron, nickel, titanium, cobalt, copper, chromium and alloys thereof along with a foaming agent that eventually evolves outwardly or is dispersed evenly throughout.
- the metallic foam 30 may also include ceramic foam mixed into or arranged in coaxial layers with the metallic foam 30.
- the solidification metallurgical bond 40 is formed at an entire interface between the metallic matrix 20 and the metallic foam 30 and includes an interface region 41 in which eutectic precipitates 42 or, for some materials, eutectic-type precipitates form on solidification. Additional regions 43, 44 where at least one of grain growth and partial re-crystallization occurs may also be formed in solid-state on opposite sides of the newly solidified interface region 41.
- the additional regions 43, 44 are respectively interposed between the interface region 41 and the main body of the metallic matrix 20 on one side and between the interface region 41 and the main body of the metallic foam 30 on the other side.
- the interface region 41 may be substantially wider than the additional regions 43, 44.
- the wind turbine component configured to have the lightweight structure 10 may be provided for use as a multi-ton complex shaped component of an apparatus such as, for example, a wind turbine and/or similar components of power generation plants (i.e., wind turbine gearbox housings or bedplates).
- the lightweight structure 10 may be provided for use in a cast housing torque arm 11 of a gearbox that may be several feet in diameter and may weigh several tons.
- the lightweight structure 10 may be provided for use in a wind turbine casing 12, as shown in FIG. 4 .
- the lightweight structure 10 is formed as an annular member within a core of the larger apparatus to at least allow the apparatus to maintain its strength and to decrease an overall weight and vibration of the apparatus.
- the height of the wind turbine can be increased as necessary to comply with local regulations and to place the rotor blades in the wind stream as much as possible. Due to the resulting decrease in the overall weight of the wind turbine, operational noise and wind turbine vibrations may be dampened. Moreover, since wind turbines configured to have lightweight components are increasingly flexible in terms of being usable in various environments and localities, the use of wind power as an alternate source of energy may increase.
- a method to form the lightweight structure 10 includes shaping a mold cavity 100 between a metallic foam 101, materials of which are similar to those of the metallic foam 30 described above, and an exterior mold 102 of, for example, packed sand or permanent steel molds.
- the method further includes filling (i.e., mold filling) the mold cavity with 100 a molten metal to form a metallic matrix 103, materials of which are similar to those of the metallic matrix 20 described above.
- the method also includes allowing for formation of a solidification metallurgical bond 104, which is similar in terms of structure and formation processes to the solidification metallurgical bond 40 described above, at an entire interface between the metallic matrix 103 and the metallic foam 101.
- the shaping may include cleaning a surface of the metallic foam 101 by at least one or more of sand blasting, grit blasting, dry ice blasting, electrolytic cleaning, acid cleaning to create desired surface topography and by the removal of oxides and/or other non-metallic surface compounds.
- the shaping may further include pre-heating the metallic foam 101 to limit or prevent cracking or porosity upon exposure thereof to the heat of the molten metal of the metallic matrix 103.
- the method may also include forming a sacrificial layer 105 about a surface of the metallic foam 101 to further limit or prevent cracking or to assist with bonding.
- This sacrificial layer 105 will be consumed by the molten metallic materials 103 upon the filling operation or will otherwise be dispersed throughout the lightweight structure 10 such that the solidification metallurgical bond 104 can be formed at the entire interface between the metallic matrix 103 and the metallic foam 101.
- the method may also include defining core regions 106 in the mold cavity by, for example, inserting cores therein. These cores may be formed to, for example, survive the filling operation such that, following the filling operation, the cores can be removed with the core regions 106 left in tact.
- the method may further include conducting a heat treatment, such as at least one of a solution heat treatment to improve the solidification metallurgical bond 104 and an age heat treatment depending on a type of materials being used for the metallic matrix 103 and the metallic foam 101.
- a heat treatment such as at least one of a solution heat treatment to improve the solidification metallurgical bond 104 and an age heat treatment depending on a type of materials being used for the metallic matrix 103 and the metallic foam 101.
- the shaping described above may be conducted in accordance with a lost foam process whereby the shaping includes building an expendable foam pattern 107 about a surface of the metallic foam 101 in the mold cavity 100, coating a surface of the foam pattern 107 with, for example, a refractory coating 108 or some other similar coating and surrounding the entire expendable foam pattern 107 and the refractory coating 108 with sand and then burning out the expendable foam pattern 107 during the filling operation.
- the refractory coating 108 may be formed of silica, graphite or another similar material such that the refractory coating 108 permits the reacted products of the expendable foam pattern 107 to move out of the mold cavity 100 during the casting operation.
- the metallic matrix 103 is formed around the metallic foam 101 similarly as described above.
- the use of such a lost foam process may permit generation of a better solidification metallurgical bond and may allow for control of bonding depth to permit formation of particular shapes and prevention of a shifting of preformed metallic foam inserts.
- the method includes shaping a mold cavity 200 within a metallic matrix 201 having an opening 2010 formed therein, filling (i.e., mold filling) the mold cavity 200 with molten metallic material 202 and a foaming agent 203 via the opening 2010 and closing the opening 2010 such that the metallic matrix 201 encloses the mold cavity 200.
- the method further includes allowing, as the molten metallic material 202 cools and foams within the mold cavity 200, for formation of a solidification metallurgical bond 204 at an entire interface between the metallic matrix 201 and the previously molten and now foamed metallic material 202.
- the shaping may include cleaning a surface of the metallic matrix 201 by at least one or more of sand blasting, grit blasting, dry ice blasting, electrolytic cleaning, acid cleaning to create desired surface topography and by the removal of oxides and/or other non-metallic surface compounds.
- the shaping may further include pre-heating the metallic matrix 201 to limit or prevent cracking or porosity upon exposure to the molten metallic material 202.
- the method may also include forming a sacrificial layer 205 similar to the sacrificial layer described above about a surface of the metallic matrix 201 to further limit or prevent cracking or to assist with bonding.
- the method may also include defining core regions 206 in the mold cavity 200 by, for example, inserting cores therein in a process similar to what is described above.
- the inserted cores can be removed once solidification is complete by way of a through-hole or a similar feature formed in the metallic matrix 201.
- the method may further include conducting at least one of a solution heat treatment to improve the solidification metallurgical bond 204 and an age heat treatment.
- the methods described above may also include controlling a distribution of the metallic material in the metallic foam 30 in accordance with known methods.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Wind Motors (AREA)
Abstract
A wind turbine component 10 having a lightweight structure is provided and includes a metallic matrix 20 defining a cavity 21, metallic foam 30 enclosed within the cavity 21 and a solidification metallurgical bond 40 formed at an entire interface 41 between the metallic matrix 20 and the metallic foam 30.
Description
- The subject matter disclosed herein relates generally to a wind turbine component and, more particularly, to a wind turbine component having a lightweight structure.
- Wind turbine powertrain components are often subject to large vibrational stresses. These vibrations can lead to premature failure of powertrain components and significant noise generation.
- According to one aspect of the invention, a wind turbine component having a lightweight structure is provided and includes a metallic matrix defining a cavity, metallic foam enclosed within the cavity and a solidification metallurgical bond formed at an entire interface between the metallic matrix and the metallic foam.
- According to another aspect of the invention, a method to form a wind turbine component configured to have a lightweight structure is provided and includes shaping a mold cavity between metallic foam and an exterior mold, filling a molten metallic matrix into the mold cavity to enclose the metallic foam and, as the molten metallic matrix cools, forming a solidification metallurgical bond at an entire interface between the metallic matrix and the metallic foam.
- According to yet another aspect of the invention, a method to form a wind turbine component configured to have a lightweight structure is provided and includes shaping a mold cavity within a metallic matrix having an opening, filling the mold cavity with molten metallic material and a foaming agent, closing the opening such that the metallic matrix encloses the mold cavity and, as the molten metallic material cools and foams within the mold cavity, forming a solidification metallurgical bond at an entire interface between the metallic matrix and the metallic foam.
- Various advantages and features will become more apparent from the following description taken in conjunction with the drawings.
- The subject matter, which is regarded as the invention, is particularly pointed out and distinctly claimed in the claims at the conclusion of the specification. The foregoing and other features, and advantages of the invention are apparent from the following detailed description taken in conjunction with the accompanying drawings in which:
-
FIG. 1 is a schematic view of a wind turbine component configured to have a lightweight structure in accordance with embodiments; -
FIG. 2 is a schematic view of a solidification metallurgical bond line; -
FIG. 3 is a cross-sectional view of a wind turbine component configured to have a lightweight structure in accordance with alternate embodiments; -
FIG. 4 is a cross-sectional view of a wind turbine component configured to have a lightweight structure in accordance with alternate embodiments; -
FIG. 5 is an illustration of a method of forming a wind turbine component having a lightweight structure according to embodiments; -
FIG. 6 is an illustration of a substantially finished wind turbine component having a lightweight structure; -
FIG. 7 is an illustration of a method of forming a wind turbine component having a lightweight structure according to embodiments; -
FIG. 8 is an illustration of a substantially finished wind turbine component having a lightweight structure; -
FIG. 9 is an illustration of a method of forming a wind turbine component having a lightweight structure according to alternative embodiments; and -
FIG. 10 is an illustration of a substantially finished wind turbine component having a lightweight structure. - The detailed description explains embodiments of the invention, together with advantages and features, by way of example with reference to the drawings.
- In accordance with various aspects, a vibration damping noise reduction lightweight structure is provided for use as a multi-ton component of various types of apparatuses. These apparatuses may include, for example, wind turbines and similar components of power generation plants. The lightweight structure may include, for example, hollow tubing and/or castings of metallic materials filled by foams of metallic materials with a solidification metallurgical bond formed at an entire interface between the metallic materials and the foams.
- With reference now to
FIG. 1 , a wind turbine component configured to have alightweight structure 10 to provide vibration damping and noise reduction is provided. Thelightweight structure 10 includes ametallic matrix 20 formed to define a cavity 21,metallic foam 30 enclosed within the cavity 21 and a solidificationmetallurgical bond 40. Themetallic matrix 20 may include any metal or metal alloy, such as, for example, aluminum, magnesium, iron, nickel, titanium, cobalt, copper, chromium and alloys thereof. Themetallic foam 30 may similarly include any metal or metal alloy, such as, for example, aluminum, magnesium, iron, nickel, titanium, cobalt, copper, chromium and alloys thereof along with a foaming agent that eventually evolves outwardly or is dispersed evenly throughout. Themetallic foam 30 may also include ceramic foam mixed into or arranged in coaxial layers with themetallic foam 30. - With reference to
FIG. 2 , the solidificationmetallurgical bond 40 is formed at an entire interface between themetallic matrix 20 and themetallic foam 30 and includes aninterface region 41 in whicheutectic precipitates 42 or, for some materials, eutectic-type precipitates form on solidification.Additional regions interface region 41. Theadditional regions interface region 41 and the main body of themetallic matrix 20 on one side and between theinterface region 41 and the main body of themetallic foam 30 on the other side. Theinterface region 41 may be substantially wider than theadditional regions - With reference to
FIGS. 3 and 4 , the wind turbine component configured to have thelightweight structure 10 may be provided for use as a multi-ton complex shaped component of an apparatus such as, for example, a wind turbine and/or similar components of power generation plants (i.e., wind turbine gearbox housings or bedplates). For example, as shown inFIG. 3 , thelightweight structure 10 may be provided for use in a casthousing torque arm 11 of a gearbox that may be several feet in diameter and may weigh several tons. Alternatively, thelightweight structure 10 may be provided for use in awind turbine casing 12, as shown inFIG. 4 . In each example, thelightweight structure 10 is formed as an annular member within a core of the larger apparatus to at least allow the apparatus to maintain its strength and to decrease an overall weight and vibration of the apparatus. - In the case of the wind turbine, by replacing conventional multi-ton components with simple or complex shapes with the
lightweight structure 10, the height of the wind turbine can be increased as necessary to comply with local regulations and to place the rotor blades in the wind stream as much as possible. Due to the resulting decrease in the overall weight of the wind turbine, operational noise and wind turbine vibrations may be dampened. Moreover, since wind turbines configured to have lightweight components are increasingly flexible in terms of being usable in various environments and localities, the use of wind power as an alternate source of energy may increase. - With reference to
FIGS. 5 and 6 , a method to form thelightweight structure 10 is provided. The method includes shaping amold cavity 100 between ametallic foam 101, materials of which are similar to those of themetallic foam 30 described above, and anexterior mold 102 of, for example, packed sand or permanent steel molds. The method further includes filling (i.e., mold filling) the mold cavity with 100 a molten metal to form ametallic matrix 103, materials of which are similar to those of themetallic matrix 20 described above. As the moltenmetallic matrix 103 cools following the filling operation, the method also includes allowing for formation of a solidificationmetallurgical bond 104, which is similar in terms of structure and formation processes to the solidificationmetallurgical bond 40 described above, at an entire interface between themetallic matrix 103 and themetallic foam 101. - The shaping may include cleaning a surface of the
metallic foam 101 by at least one or more of sand blasting, grit blasting, dry ice blasting, electrolytic cleaning, acid cleaning to create desired surface topography and by the removal of oxides and/or other non-metallic surface compounds. The shaping may further include pre-heating themetallic foam 101 to limit or prevent cracking or porosity upon exposure thereof to the heat of the molten metal of themetallic matrix 103. The method may also include forming asacrificial layer 105 about a surface of themetallic foam 101 to further limit or prevent cracking or to assist with bonding. Thissacrificial layer 105 will be consumed by the moltenmetallic materials 103 upon the filling operation or will otherwise be dispersed throughout thelightweight structure 10 such that the solidificationmetallurgical bond 104 can be formed at the entire interface between themetallic matrix 103 and themetallic foam 101. Still further, the method may also include definingcore regions 106 in the mold cavity by, for example, inserting cores therein. These cores may be formed to, for example, survive the filling operation such that, following the filling operation, the cores can be removed with thecore regions 106 left in tact. - Once the
metallic matrix 103 has solidified and cooled by a predefined degree, the method may further include conducting a heat treatment, such as at least one of a solution heat treatment to improve the solidificationmetallurgical bond 104 and an age heat treatment depending on a type of materials being used for themetallic matrix 103 and themetallic foam 101. - With reference to
FIGS. 7 and 8 , the shaping described above may be conducted in accordance with a lost foam process whereby the shaping includes building anexpendable foam pattern 107 about a surface of themetallic foam 101 in themold cavity 100, coating a surface of thefoam pattern 107 with, for example, arefractory coating 108 or some other similar coating and surrounding the entireexpendable foam pattern 107 and therefractory coating 108 with sand and then burning out theexpendable foam pattern 107 during the filling operation. Therefractory coating 108 may be formed of silica, graphite or another similar material such that therefractory coating 108 permits the reacted products of theexpendable foam pattern 107 to move out of themold cavity 100 during the casting operation. With theexpendable foam pattern 107 being replaced by molten metal, themetallic matrix 103 is formed around themetallic foam 101 similarly as described above. The use of such a lost foam process may permit generation of a better solidification metallurgical bond and may allow for control of bonding depth to permit formation of particular shapes and prevention of a shifting of preformed metallic foam inserts. - With reference to
FIGS. 9 and 10 , a method to form thelightweight structure 10 in accordance with alternative embodiments is provided. The method includes shaping amold cavity 200 within ametallic matrix 201 having anopening 2010 formed therein, filling (i.e., mold filling) themold cavity 200 with moltenmetallic material 202 and a foaming agent 203 via theopening 2010 and closing theopening 2010 such that themetallic matrix 201 encloses themold cavity 200. The method further includes allowing, as the moltenmetallic material 202 cools and foams within themold cavity 200, for formation of a solidificationmetallurgical bond 204 at an entire interface between themetallic matrix 201 and the previously molten and now foamedmetallic material 202. - The shaping may include cleaning a surface of the
metallic matrix 201 by at least one or more of sand blasting, grit blasting, dry ice blasting, electrolytic cleaning, acid cleaning to create desired surface topography and by the removal of oxides and/or other non-metallic surface compounds. The shaping may further include pre-heating themetallic matrix 201 to limit or prevent cracking or porosity upon exposure to the moltenmetallic material 202. The method may also include forming asacrificial layer 205 similar to the sacrificial layer described above about a surface of themetallic matrix 201 to further limit or prevent cracking or to assist with bonding. Still further, the method may also include definingcore regions 206 in themold cavity 200 by, for example, inserting cores therein in a process similar to what is described above. The inserted cores can be removed once solidification is complete by way of a through-hole or a similar feature formed in themetallic matrix 201. - Once the
metallic matrix 201 has cooled by a predefined degree, the method may further include conducting at least one of a solution heat treatment to improve the solidificationmetallurgical bond 204 and an age heat treatment. - In accordance with still further embodiments, the methods described above may also include controlling a distribution of the metallic material in the
metallic foam 30 in accordance with known methods. - While the invention has been described in detail in connection with only a limited number of embodiments, it should be readily understood that the invention is not limited to such disclosed embodiments. Rather, the invention can be modified to incorporate any number of variations, alterations, substitutions or equivalent arrangements not heretofore described, but which are commensurate with the spirit and scope of the invention. Additionally, while various embodiments of the invention have been described, it is to be understood that aspects of the invention may include only some of the described embodiments. Accordingly, the invention is not to be seen as limited by the foregoing description, but is only limited by the scope of the appended claims.
Claims (9)
- A method to form a wind turbine component (10) configured to have a lightweight structure, the method comprising:shaping a mold cavity (21) between metallic foam (30) and an exterior mold (102);filling a molten metallic matrix (20) into the mold cavity (21) to enclose the metallic foam (30); andas the molten metallic matrix (20) cools, forming a solidification metallurgical bond (40) at an entire interface (41) between the metallic matrix (20) and the metallic foam (30).
- The method according to claim 1, further comprising controlling a distribution of metallic material in the metallic foam (30).
- The method according to any preceding claim, wherein the shaping comprises at least one or more of cleaning a surface of the metallic foam (30) and pre-heating the metallic foam (30).
- The method according to any preceding claim, further comprising forming a sacrificial layer (105) about a surface of the metallic foam (30).
- The method according to any preceding claim, further comprising defming core regions (106) in the mold cavity (21).
- The method according to any preceding claim, further comprising conducting a heat treatment to improve the solidification metallurgical bond (40).
- The method according to any preceding claim, wherein the shaping comprises:building an expendable foam pattern (107) in the mold cavity (21);coating a surface of the expendable foam pattern (107); andburning out the expendable foam pattern (107) around preformed metallic foam inserts during the filling.
- The method according to any preceding claim, further comprising forming the metallic matrix (20) and the metallic foam (30) as a multi-ton, complex shaped component with annular and angular features.
- A method to form a wind turbine component (10) configured to have a lightweight structure, the method comprising:shaping a mold cavity (21) between metallic foam (30) and an exterior mold (102);building a coated expendable foam pattern (107) in the mold cavity (21);filling a molten metallic matrix (20) into the mold cavity to enclose the metallic foam such that the expendable foam pattern is burned out around preformed metallic foam inserts during the filling; andas the molten metallic matrix (20) cools, forming a solidification metallurgical bond (40) at an entire interface (41) between the metallic matrix (20) and the metallic foam (30).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/204,386 US20120051898A1 (en) | 2011-08-05 | 2011-08-05 | Wind turbine component having a lightweight structure |
US13/488,892 US20130032303A1 (en) | 2011-08-05 | 2012-06-05 | Wind turbine component having a lightweight structure |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2554297A2 true EP2554297A2 (en) | 2013-02-06 |
Family
ID=47002541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12178868A Withdrawn EP2554297A2 (en) | 2011-08-05 | 2012-08-01 | Wind turbine component having a lightweight structure |
Country Status (3)
Country | Link |
---|---|
US (1) | US20130032303A1 (en) |
EP (1) | EP2554297A2 (en) |
CN (1) | CN102913395A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3421156B1 (en) * | 2017-06-30 | 2020-06-24 | Ansaldo Energia Switzerland AG | Casting method for producing a blade for a gas turbine |
CN109022883A (en) * | 2018-08-17 | 2018-12-18 | 佛山皖和新能源科技有限公司 | A kind of preparation method of wind-driven generator alloy material |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5524696A (en) * | 1994-08-05 | 1996-06-11 | General Motors Corporation | Method of making a casting having an embedded preform |
DE10357656A1 (en) * | 2003-12-10 | 2005-07-07 | Mtu Aero Engines Gmbh | Method for producing gas turbine components and component for a gas turbine |
JP4699255B2 (en) * | 2006-03-24 | 2011-06-08 | 三菱重工業株式会社 | Windmill wing |
-
2012
- 2012-06-05 US US13/488,892 patent/US20130032303A1/en not_active Abandoned
- 2012-08-01 EP EP12178868A patent/EP2554297A2/en not_active Withdrawn
- 2012-08-03 CN CN2012102752884A patent/CN102913395A/en active Pending
Non-Patent Citations (1)
Title |
---|
None |
Also Published As
Publication number | Publication date |
---|---|
US20130032303A1 (en) | 2013-02-07 |
CN102913395A (en) | 2013-02-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20120051898A1 (en) | Wind turbine component having a lightweight structure | |
CN106077507B (en) | A kind of casting die and casting technique of automobile water-cooling motor casing casting | |
US7389809B2 (en) | Tool for producing cast components, method for producing said tool, and method for producing cast components | |
CN112387958B (en) | Manufacturing method of super duplex stainless steel single-stage double-suction centrifugal pump shell | |
US20240017510A1 (en) | Manufacturing method of carbon fiber profiled bodies for aerospace, aviation and fire fighting | |
CN102806313B (en) | Method for preventing casting boss from shrinkage porosity | |
EP2554297A2 (en) | Wind turbine component having a lightweight structure | |
EP0531051B1 (en) | Apparatus and method for casting in graphite molds | |
Adedipe et al. | Design and fabrication of a centrifugal casting machine | |
JP6043075B2 (en) | Cast turbine casing and nozzle diaphragm preform | |
CN108927504A (en) | A kind of casting technique of aluminium alloy large-sized engine crankcase part | |
US8079401B2 (en) | Method and apparatus for forming a casting | |
US5983983A (en) | Method of making fine grained castings | |
CN112916804A (en) | Casting process for integrally casting large nodular cast iron impeller of vacuum pump | |
US8240355B2 (en) | Forming a cast component with agitation | |
GB1601902A (en) | Low pressure casting installation | |
US20130118704A1 (en) | Electromagnetically stirred sand castings | |
EP3059030B1 (en) | Bondcasting process using investment and sand casting | |
EP2202014A2 (en) | Temperature controlled mold | |
CN211388269U (en) | Casting precoated sand rust prevention device | |
WO2016153370A1 (en) | A method of production of light-alloy castings, zone-reinforced with metal components in the form of inserts, especially in sand and permanent moulds | |
JP2004306044A (en) | Precision casting apparatus and precision casting method using the same | |
JP2010227965A (en) | Method for controlling solidification of casting | |
US10207314B2 (en) | Investment mold with fugitive beads and method related thereto | |
RU2328359C1 (en) | Device for production of casts with crystallisation under pressure |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20150303 |