CN117884572A - Casting mould of large-scale wind-driven electric shaft casting and construction method thereof - Google Patents
Casting mould of large-scale wind-driven electric shaft casting and construction method thereof Download PDFInfo
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- CN117884572A CN117884572A CN202410112338.XA CN202410112338A CN117884572A CN 117884572 A CN117884572 A CN 117884572A CN 202410112338 A CN202410112338 A CN 202410112338A CN 117884572 A CN117884572 A CN 117884572A
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- sand
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- casting
- sand core
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- 238000005266 casting Methods 0.000 title claims abstract description 51
- 238000010276 construction Methods 0.000 title abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 146
- 239000004576 sand Substances 0.000 claims abstract description 80
- 229910052742 iron Inorganic materials 0.000 claims abstract description 73
- 239000011347 resin Substances 0.000 claims abstract description 31
- 229920005989 resin Polymers 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000001914 filtration Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000004321 preservation Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 description 8
- 210000002489 tectorial membrane Anatomy 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Abstract
The invention discloses a casting mould of a large-scale wind turbine shaft casting and a construction method thereof, which belong to casting technology, wherein the rigidity and cooling speed of the casting mould are poor in the existing casting mould constructed by resin sand. The structure and the process method that the precoated sand layer is adhered to the inner wall of the iron mold and resin sand is filled in the cover box, the bottom box and the sand core are utilized, so that molten iron is rapidly cooled through the iron mold after being poured, the cooling speed is increased, the heat preservation time is shortened, the production efficiency is improved, and the product quality is ensured.
Description
Technical Field
The invention belongs to the casting technology, and particularly relates to a casting mould of a large-scale wind turbine shaft casting and a construction method thereof, which are suitable for the production and the manufacture of the large-scale wind turbine shaft casting.
Background
The large-scale wind power shaft parts are cast instead of forged, so that the manufacturing cost can be saved. However, in a general foundry, when casting large-scale wind turbine shaft parts, it is important to increase the rigidity of the casting mold and accelerate the cooling speed of the casting mold, so that a product with compact structure and excellent mechanical properties can be obtained.
The existing technology for constructing the casting mould by using resin sand has the defects that the sand core and the cavity are filled with the resin sand, the part of the sand core and the cavity are chilled by chill, the rigidity and the cooling speed of the whole casting mould are poor, and the requirements of large-scale wind turbine shaft castings cannot be met.
Disclosure of Invention
The invention aims to solve the technical problems and the technical task of overcoming the defects of poor rigidity and cooling speed of the casting mold in the prior art of constructing the casting mold by using resin sand, and provides a casting mold of a large-scale wind turbine shaft casting and a construction method thereof.
In order to achieve the above purpose, the casting mould of the large-scale wind turbine shaft casting comprises a bottom box, a plurality of iron molds, a cover box and a sand core, wherein the bottom box, the plurality of iron molds and the cover box are sequentially stacked from bottom to top to form a cavity therein, and the sand core is positioned in the cavity and is arranged on the bottom box to form a cavity; the method is characterized in that: the inner wall of the iron mold is adhered with a precoated sand layer, resin sand is filled in the cover box, the bottom box and the sand core, and a main sprue, a split sprue, an inner sprue and a filter which are communicated with the pouring basin and the cavity are arranged in the resin sand of the casting mold.
According to the invention, through the process method of combining the precoated sand layer attached to the inner wall of the iron mold with the resin sand filled in the cover box, the bottom box and the sand core, the molten iron is rapidly cooled through the iron mold after being poured, so that the cooling speed is increased, the heat preservation time is shortened, the production efficiency is improved, and the product quality is ensured. The cover box, the bottom box and the sand core are filled with resin sand, so that the forming of process elements such as a total sprue, a split sprue, a filtering system and an inner sprue is facilitated, and meanwhile, tiny gaps exist among resin sand particles, so that a large amount of gas generated by organic matters is conveniently discharged during pouring, and the occurrence of air hole defects is prevented.
Preferably, the thickness of the precoated sand layer is 10-20mm. Too thick is greater than 20mm and can lead to the iron mould cooling rate to reduce after pouring, and the foundry goods surface can not fine chill, and the precoated sand gas generating capacity is very big moreover, and too thick precoated sand layer can a large amount of gas production after pouring, and the foundry goods easily forms the gas pocket defect. Too thin being less than 10mm, the tectorial membrane sand layer part is difficult for filling completely on the one hand, exposes the iron mould metal surface, and the iron mould is glued firmly easily to molten iron during the pouring to and creep into between tectorial membrane sand layer and the iron mould, on the other hand too thin tectorial membrane sand layer can lead to intensity low, and the fracture easily under the circumstances of expend with heat and contract with cold.
In order to filter impurities in molten iron, a filter is formed in the bottom box, a filter sand core is sleeved in the iron mold, and the filter sand core form a molten iron filtering system.
Preferably, the center part of the bottom box is provided with a sand hanging boss, the lower end of the sand core is arranged on the sand hanging boss through a locating pin, the upper end of the sand core extends into a sand core locating groove of the cover box, the cavity is positioned at the periphery of the sand core and the sand hanging boss, and the total sprue is distributed in the cover box, the sand core, the sand hanging boss and the bottom box. Therefore, the sand core can be simply positioned and fixed to be installed, and the sand core installed in place is ensured not to shift.
Preferably, the split sprue and the ingate are distributed in the resin sand of the bottom box. So as to ensure that molten iron can be distributed to each split sprue, the ingate and the filter at consistent flow and flow rate during pouring and ensure the quality of castings.
Preferably, the precoated sand layer extends from the inner wall of the iron mold to the end face of the iron mold. The method ensures that the precoated sand layer and the heat dissipation are continuous at the adjacent positions of the iron mold and the iron mold when the iron mold is stacked, and simultaneously can effectively avoid damage during installation and stacking.
In order to achieve the above object, the method for constructing a casting mold according to the present invention comprises stacking a bottom box, a plurality of iron molds and a cover box in sequence from bottom to top to form a cavity therein, and arranging a sand core in the cavity and on the bottom box to form a cavity, wherein: the inner wall of the iron mold is adhered with a precoated sand layer, and resin sand is filled in the cover box, the bottom box and the sand core.
According to the invention, through the process method of combining the precoated sand layer attached to the inner wall of the iron mold with the resin sand filled in the cover box, the bottom box and the sand core, the molten iron is rapidly cooled through the iron mold after being poured, so that the cooling speed is increased, the heat preservation time is shortened, the production efficiency is improved, and the product quality is ensured. The cover box, the bottom box and the sand core are filled with resin sand, so that the forming of process elements such as a total sprue, a split sprue, a filtering system and an inner sprue is facilitated, and meanwhile, tiny gaps exist among resin sand particles, so that a large amount of gas generated by organic matters is conveniently discharged during pouring, and the occurrence of air hole defects is prevented.
Preferably, the thickness of the precoated sand layer is 10-20mm. Too thick is greater than 20mm and can lead to the iron mould cooling rate to reduce after pouring, and the foundry goods surface can not fine chill, and the precoated sand gas generating capacity is very big moreover, and too thick precoated sand layer can a large amount of gas production after pouring, and the foundry goods easily forms the gas pocket defect. Too thin being less than 10mm, the tectorial membrane sand layer part is difficult for filling completely on the one hand, exposes the iron mould metal surface, and the iron mould is glued firmly easily to molten iron during the pouring to and creep into between tectorial membrane sand layer and the iron mould, on the other hand too thin tectorial membrane sand layer can lead to intensity low, and the fracture easily under the circumstances of expend with heat and contract with cold.
Preferably, the precoated sand layer extends from the inner wall of the iron mold to the end face of the iron mold. The method ensures that the precoated sand layer and the heat dissipation are continuous at the adjacent positions of the iron mold and the iron mold when the iron mold is stacked, and simultaneously can effectively avoid damage during installation and stacking.
According to the invention, a precoated sand layer is attached to the inner wall of an iron mold, resin sand is filled in a cover box, a bottom box and a sand core, and a main sprue, a split sprue, an inner sprue and a filter which are communicated with a pouring basin and a cavity are arranged in the resin sand of the casting mold. The structure and the process method that the precoated sand layer is adhered to the inner wall of the iron mold and resin sand is filled in the cover box, the bottom box and the sand core are utilized, so that molten iron is rapidly cooled through the iron mold after being poured, the cooling speed is increased, the heat preservation time is shortened, the production efficiency is improved, and the product quality is ensured. The cover box, the bottom box and the sand core are filled with resin sand, so that the forming of process elements such as a total sprue, a split sprue, a filtering system and an inner sprue is facilitated, and meanwhile, tiny gaps exist among resin sand particles, so that a large amount of gas generated by organic matters is conveniently discharged during pouring, and the occurrence of air hole defects is prevented.
Drawings
FIG. 1 is a schematic cross-sectional view of a casting mold of a large-scale wind turbine shaft casting of the present invention;
FIG. 2 is a schematic view of the mold of FIG. 1 with the sand core removed;
Fig. 3 is an enlarged view of a portion a in fig. 1;
FIG. 4 is a cross-sectional view taken along the direction A-A in FIG. 2;
FIG. 5 is a schematic cross-sectional view of a large-scale wind turbine shaft casting;
the reference numerals in the figures illustrate: 1-pouring basin, 2-cover box, 3-iron mold, 4-bottom box, 5-split sprue, 6-inner sprue, 7-filter, 8-filter sand core, 9-precoated sand layer, 10-resin sand, 11-locating pin, 12-total sprue, 13-sand core, 14-cavity, 15-cavity, 16-sand lifting boss, 17-sand core locating groove and 18-large-scale wind power shaft casting.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms "comprises" and "comprising" and any variations thereof, in the description and claims, are intended to cover a non-exclusive inclusion, such as a method or article, that comprises a list of features does not necessarily limit the features to those expressly listed, but may include other features not expressly listed that may be included in such method or article.
The present invention will be described in detail with reference to specific embodiments and drawings.
As shown in fig. 1-4, the casting mold of the large-scale wind turbine shaft casting comprises a bottom box 4, a plurality of iron molds 3, a cover box 2, a sand core 13 and a pouring basin 1. The bottom case 4, the plurality of iron molds 3 and the cover case 2 are stacked one on top of the other and form a cavity therein. A sand core 13 is located within the cavity and mounted on the bottom box 4 to form a cavity 14. The precoated sand layer 9 is attached to the inner wall of the iron mold 3, and extends from the inner wall of the iron mold to the end face of the iron mold, so that the precoated sand layer can be continuous and continuous in heat dissipation at the adjacent positions of the iron mold and the iron mold when the iron mold is stacked, and damage during installation and stacking can be effectively avoided. The cover box 2, the bottom box 4 and the sand core 13 are filled with resin sand, and a total sprue 12, a split sprue 5, an inner sprue 6 and a filter 7 which are communicated with the pouring basin 1 and the cavity 14 are arranged in the resin sand of the casting mould 01. In fig. 4, the split sprue 5, the inner sprue 6 and the filter 7 are circumferentially distributed, and the cross-sectional structure of the resin sand is omitted in fig. 4 for clarity of illustration of the split sprue 5, the inner sprue 6. The tundish 1 is mounted on the cover box.
Wherein the thickness of the precoated sand layer 9 is 10-20mm. The filter 7 is formed in the bottom box 4, the filter sand core 8 is sleeved in the iron mold 3, and the filter 7 and the filter sand core 8 form a molten iron filtering system. That is, the part of the molten iron filtering system in the iron mold is formed by adopting a filter sand core. If the iron mold is used for sand coating, on the one hand, the precoated sand is difficult to fill to the position, on the other hand, the scouring and the residence time of the molten iron at the position in the casting process are long, the precoated sand layer is easy to fall off, the sand inclusion defect is easy to generate, and the filter sand core is adopted, only an iron core seat is needed for the iron mold part, the precoated sand is not needed to be adhered, the forming is easy, the operation is convenient, and the adverse effect on the casting of the molten iron in the later stage is avoided. The center part of the bottom box 4 is provided with a sand-lifting boss 16, the lower end of a sand core 13 is arranged on the sand-lifting boss 16 through a locating pin 11, the upper end of the sand core 13 extends into a sand core locating groove 17 of the cover box 2, a cavity is arranged on the periphery of the sand core 13 and the sand-lifting boss 16, and the total sprue 12 is distributed in the cover box 2, the sand core 13, the sand-lifting boss 16 and the bottom box 4. The split sprue 5 and the ingate 6 are distributed in the resin sand of the bottom box 4.
The mould is characterized in that the outer side wall of the mould is formed by the precoated sand layer by utilizing the structure and the technological method that the precoated sand layer is adhered to the inner wall of the iron mould and resin sand is filled in the cover box, the bottom box and the sand core, and the bottom surface, the top surface and the central part of the mould are formed by adopting the resin sand. The molten iron is quickly cooled by the iron mold after being poured, so that the cooling speed is increased, the heat preservation time is shortened, the production efficiency is improved, and the product quality is ensured. The large-scale wind turbine shaft casting which is formed by casting and is subjected to preliminary processing is shown in figure 4.
Claims (9)
1. The casting mould of the large-scale wind turbine shaft casting comprises a bottom box (4), a plurality of iron molds (3), a cover box (2) and a sand core (13), wherein the bottom box (4), the iron molds (3) and the cover box (2) are sequentially stacked from bottom to top to form a cavity therein, and the sand core (13) is positioned in the cavity and is arranged on the bottom box (4) to form a cavity (14); the method is characterized in that: the inner wall of the iron mold (3) is attached with a precoated sand layer (9), resin sand is filled in the cover box (2), the bottom box (4) and the sand core (13), and a total sprue (12), a split sprue (5), an inner sprue (6) and a filter (7) which are communicated with the pouring basin (1) and the cavity (14) are arranged in the resin sand of the casting mold (01).
2. The mold of a large-scale wind turbine shaft casting according to claim 1, wherein: the thickness of the precoated sand layer (9) is 10-20mm.
3. A mould for large-scale wind turbine shaft castings according to claim 1 or 2, characterized in that: a filter (7) is formed in the bottom box (4), a filter sand core (8) is sleeved in the iron mold (3), and the filter (7) and the filter sand core (8) form a molten iron filtering system.
4. A mould for large-scale wind turbine shaft castings according to claim 1 or 2, characterized in that: the center part of the bottom box (4) is provided with a sand hanging boss (16), the lower end of the sand core (13) is arranged on the sand hanging boss (16) through a locating pin (11), the upper end of the sand core (13) extends into a sand core locating groove (17) of the cover box (2), a cavity is arranged on the periphery of the sand core (13) and the sand hanging boss (16), and the total sprue (12) is distributed in the cover box (2), the sand core (13), the sand hanging boss (16) and the bottom box (4).
5. The mold for large-scale wind turbine shaft castings according to claim 4, wherein: the split sprue (5) and the inner runner (6) are distributed in the resin sand of the bottom box (4).
6. A mould for large-scale wind turbine shaft castings according to claim 1 or 2, characterized in that: the precoated sand layer (9) extends from the inner wall of the iron mold (3) to the end face of the iron mold (3).
7. The casting mold constructing method is characterized in that a bottom box (4), a plurality of iron molds (3) and a cover box (2) are sequentially stacked from bottom to top to form a cavity, a sand core (13) is positioned in the cavity and is arranged on the bottom box (4) to form a cavity (14), and the casting mold constructing method is characterized in that: the inner wall of the iron mold (3) is adhered with a precoated sand layer (9), and resin sand is filled in the cover box (2), the bottom box (4) and the sand core (13).
8. The method for constructing a mold according to claim 7, wherein: the thickness of the precoated sand layer (9) is 10-20mm.
9. A mould for large-scale wind turbine shaft castings according to claim 7 or 8, wherein: the precoated sand layer (9) extends from the inner wall of the iron mold (3) to the end face of the iron mold (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410112338.XA CN117884572A (en) | 2024-01-26 | 2024-01-26 | Casting mould of large-scale wind-driven electric shaft casting and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410112338.XA CN117884572A (en) | 2024-01-26 | 2024-01-26 | Casting mould of large-scale wind-driven electric shaft casting and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117884572A true CN117884572A (en) | 2024-04-16 |
Family
ID=90644492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410112338.XA Pending CN117884572A (en) | 2024-01-26 | 2024-01-26 | Casting mould of large-scale wind-driven electric shaft casting and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117884572A (en) |
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2024
- 2024-01-26 CN CN202410112338.XA patent/CN117884572A/en active Pending
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