CN207770759U - A kind of sand casting sand core combination structure and gas turbine cylinder - Google Patents
A kind of sand casting sand core combination structure and gas turbine cylinder Download PDFInfo
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- CN207770759U CN207770759U CN201721901772.8U CN201721901772U CN207770759U CN 207770759 U CN207770759 U CN 207770759U CN 201721901772 U CN201721901772 U CN 201721901772U CN 207770759 U CN207770759 U CN 207770759U
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Abstract
The utility model discloses a kind of sand casting sand core combination structure and gas turbine cylinder, a kind of sand casting sand core combination structure includes at least one first sand core and counterpart, and the counterpart is the second sand core or sand mold；First sand core end set has core print, is arranged on auxiliary section fluted；Core print coordinates with groove gap, is formed with sand core gap.Sand mold matching part is provided with sand core gap in the first sand core and the second sand core or the first sand core, the first sand core can be allowed by thermal stretching in casting process, it effectively prevents the sand core caused by the stress between two sand cores or between sand core and sand mold to deform, to effectively control the generation of casting flaw.
Description
Technical field
The utility model is related to a kind of sand casting sand core combination structure and gas turbine cylinders.
Background technology
For complicated casting, multiple sand cores are provided in sand casting process, in sandbox, it is described more
A sand core needs to cooperate or coordinate to form the inner cavity of casting with sand mold；In molten metal casting process, sand core can be by
Heat increases, and occurs mutually to squeeze bad student's stress between sand core and sand core or between sand core and sand mold in matching part, in turn
Sand core, which is deformed, eventually leads to casting dimension deviation.
For large-scale gas turbine cylinder body, described problem is even more serious；Multiple sand cores are provided in sandbox, it is more
A sand core includes several groups inner cavity sand core and thin-walled air flue sand core, and thin-walled air flue sand core size is larger and thickness is smaller, thin-walled gas
Road sand core end is by core print and the fit depressions that are set on the sand core of inner cavity, the thin-walled air flue sand core and interior in casting process
Chamber sand core is melted metal and is wrapped up, thin-walled air flue sand core expanded by heating, increases towards core print direction and extends, then thin-walled air flue sand
It mutually squeezed between core and inner cavity sand core, generate stress, and the stress value of the stress is great；Exactly by
In the presence of the stress, gross distortion can occur for sand core especially thin-walled air flue sand core, eventually lead to casting dimension production
Raw deviation.
Meanwhile inner cavity sand core, thin-walled air flue sand core be in casting pouring, process of setting, the resin of sand grain surface is heated soft
Change, at this moment, if there are the stress between sand core, the resin film between sand grains will be broken, inner cavity sand core and thin-walled gas
Road sand core surface cracks, or even core damage occurs, to cause casting flaw.
Utility model content
The utility model is to solve the above-mentioned problems, it is proposed that a kind of sand casting sand core combination structure and gas turbine cylinder
Body, the utility model can effectively solve the problem that be caused due between sand core and sand core or generating stress between sand core and sand mold
Sand core problem on deformation and sand core be vented unsmooth problem, to effectively control the generation of casting flaw.
To achieve the goals above, the utility model adopts the following technical solution：
A kind of sand casting sand core combination structure, it is characterized in that：It is described to match including at least one first sand core and counterpart
Component is the second sand core or sand mold；
The first sand core end set has core print, is arranged on auxiliary section fluted；
The core print coordinates with groove gap, is formed with sand core gap.
Certainly, composite structure may include multigroup first sand core and counterpart, and every group of counterpart can be identical, can also
It is different.
Further, the first sand core length is more than 500mm, and thickness is less than 50mm.
Further, the core print is trapezium structure, correspondingly, the groove is similarly trapezium structure.
Certainly, those skilled in the art can be on the basis of the utility model, and the end of the first sand core replaces with ladder
Type, rectangle etc., correspondingly, groove replaces with corresponding shape, what these belonged to be readily apparent that, it is new that this practicality ought to be belonged to
The protection domain of type.
Further, the first gap, core print side and groove side are provided between the core print end face and groove end face
Between be provided with the second gap, the first gap is more than the second gap；
Further, the sand core gap includes the first gap and the second gap.
Further, first interstice coverage is 6~9mm, and second interstice coverage is 3~5mm.
Further, the core print side and groove side are provided with several notches, and fire sealer is provided in notch；
Alternatively, core print side is provided with several notches, and fire sealer is provided in notch.
Further, the groove is arc-shaped, and quantity is set as 2~6.
Certainly, notch may be set to be rectangle, trapezoidal, stepped.
Preferably, the fire sealer is asbestos cord.
First sand core is thin-walled air flue sand core, and length range is 800mm~1200mm；
Second sand core is inner cavity sand core.
A kind of gas turbine cylinder is cast by above-mentioned sand casting sand core combination structure.
Compared with prior art, the beneficial effects of the utility model are：
1, the first sand core and the second sand core or the first sand core and sand mold matching part are provided with sand core gap, were casting
The first sand core can be allowed by thermal stretching in journey, effectively prevented due to the stress between two sand cores or between sand core and sand mold
Sand core deforms caused by effect, and the technology to efficiently solve the casting dimension deviation caused by sand core deformation is asked
Topic.
2, the first sand core and the second sand core or the first sand core and sand mold matching part are provided with fire sealer, it can be effective
It avoids molten metal from being back to sand core gap, is limited to solve heated increase of sand core caused by molten metal reflux
The technical issues of, further effectively control the generation of casting flaw.
3, the first sand core and the second sand core or the first sand core and sand mold matching part are provided with fire sealer, effectively avoid
Sand core venthole blockage problem caused by entering sand core gap due to molten metal ensure that sand core is arranged in casting process
Gas is smooth, effectively controls the generation of the casting flaws such as stomata.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the improper restriction to the application for explaining the application.
Fig. 1 is the principles of the present invention schematic diagram；
Fig. 2 is the application schematic diagram of the utility model；
Fig. 3 is the structural schematic diagram of the first embodiment of the utility model；
Fig. 4 is the structural schematic diagram of second of embodiment of the utility model；
Fig. 5 is the structural schematic diagram of the third embodiment of the utility model；
Fig. 6 is the structural schematic diagram of the 4th kind of embodiment of the utility model；
Fig. 7 is the structural schematic diagram of the third embodiment of the utility model；
Fig. 8 is the structural schematic diagram of the third embodiment of the utility model；
Wherein, 1, groove, 2, core print, the 3, second sand core (inner cavity sand core), the 4, first sand core (thin-walled air flue sand core), 5, sand
Core gap, 6, casting, 7, notch, 8, first end face, 9, second end face, 10, first side, 11, second side, between 12, first
Gap, the 13, second gap.
Specific implementation mode：
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
In the present invention, term for example "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal",
The orientation or positional relationship of the instructions such as " side ", "bottom" is to be based on the orientation or positional relationship shown in the drawings, only to facilitate chatting
The relative for stating each component of the utility model or component structure relationship and determination, not refer in particular in the utility model either component or
Element should not be understood as limiting the present invention.
In the utility model, term such as " affixed ", " connected ", " connection " shall be understood in a broad sense, and expression can be fixed
Connection, can also be to be integrally connected or be detachably connected；It can be directly connected, the indirect phase of intermediary can also be passed through
Even.Related scientific research for this field or technical staff can determine above-mentioned term in the present invention as the case may be
Concrete meaning, should not be understood as limiting the present invention.
As described in the background art, heavy castings are in sand casting process, sand core can because itself by thermal stretching and
Stress is generated between each other or between sand mold, and then sand core will produce deformation and eventually lead to casting dimension deviation.
For complicated large-scale gas turbine cylinder body, casting sand core includes more elongated and shape
Irregular thin-walled air flue sand core, these elongated thin-walled air flue sand cores are obstructed by thermal stretching in casting process, inner cavity sand core
Stress is generated between thin-walled air flue sand core, causes thin-walled air flue sand core to be deformed, and then lead to gas turbine cylinder
Dimensional discrepancy, while it is also possible to the defects of leading to core damage, sand holes.
The utility model provides a kind of sand casting sand core combination structure, overcomes above-mentioned technology existing in the prior art
Defect.
Embodiment one
A kind of sand casting sand core combination structure, including 4 and second sand core 3 of at least one first sand core, as shown in Figure 1,
First sand core, 4 size is larger and thickness is smaller, and 4 length of the first sand core is preferably greater than 500mm, and thickness is less than 50mm；At least
One the first sand core 4 and the second sand core 3 are combined forming 6 inner cavity of casting.
Certainly, above-mentioned parameter in other embodiments, can be changed as the case may be, be not limited in it is above-mentioned about
Beam.
As shown in Fig. 2, 4 end set of the first sand core has core print 2,3 corresponding position of the second sand core is provided with to match with core print 2
The groove 1 of conjunction, 4 and second sand core 3 of at least one first sand core are cooperated by the core print 2 and groove 1, core print 2 with it is recessed
Slot 1 is formed with sand core gap 5.
As an implementation, core print 2 is set as trapezium structure, correspondingly, groove 1 is all trapezium structure, i.e. core print 2
It is all provided with certain gradient with 1 side of groove, with guiding role；
The first gap 12, core print 2 are provided between 2 end face of core print (first end face 8) and 1 end face of groove (second end face 9)
The second gap 13 is provided between side (first side 10) and 1 side of groove (second side 11)；First gap 12 is preferred
More than the second gap 13, preferably control is preferably controlled in 3~5mm in 6~9mmm, the second gap 13 in the first gap 12.
It should be noted that the core print 2 and the structure type of groove 1 need not be confined to above-mentioned trapezium structure, at it
In his embodiment, core print 2 can be other structure types, such as step type, rectangle etc. with groove 1, likewise, core print 2
It is formed with sand core gap 5 with groove 1, the first gap 12 is more than the second gap 13.
In practical applications, molten metal wraps up 4 and second sand core 3 of the first sand core, the first sand core 4 and the second sand core
3 heated growths, since 4 size of the first sand core is larger and thickness is smaller, and then it is maximum in the increment of length direction, i.e., and first
Sand core 4 mainly increases towards 2 direction of core print, and the setting in first gap 12 is it is possible to prevente effectively from the first sand core 4 and the second sand core 3
Occur mutually to squeeze and then generates stress；Second gap 13, which is less than the first gap 12, to carry out accurately sand core
Positioning.
Further, it in order to avoid molten metal enters the sand core gap 5, needs to be arranged in sand core gap 5 and bank up a fire
Device, fire sealer are preferably disposed in the second gap.
As an implementation, be arranged jagged 7 in first side 10 and second side 11, respectively the first notch with
Second notch, the first notch is identical as the second breach quantity, and is open and is oppositely arranged；First notch and the second notch are preferred
It is set as arc-shaped, radius is preferably 5~7mm, and it is 2~6 that the quantity of first notch and the second notch, which is preferable to provide,
A (circle)；It is provided with fire sealer in the notch 7, which is made of heat-resisting material, and the fire sealer is excellent
It is selected as asbestos cord or wick.
It should be noted that in other examples, the notch 7 can be only set in first side 10；In addition,
The notch 7 or rectangle, trapezoidal, stepped, those skilled in the art can be designed according to specific operating mode.
A kind of gas turbine cylinder sand casting sand core combination structure, including at least one first sand core 4 as described above
With the second sand core 3, first sand core 4 is gas turbine cylinder thin-walled air flue sand core, and second sand core 3 is in gas turbine
Chamber sand core；Further, thin-walled air flue sand core size is larger and its thickness is smaller, and length is generally 800~1000mmm；Institute
The outside wall surface shape for stating thin-walled air flue sand core is corresponding with gas turbine cylinder air intake duct, can may be flat for curved surface
Face.
A kind of gas turbine cylinder using sand casting sand core combination structure disclosed above cast.
Embodiment two
A kind of sand casting sand core combination structure and embodiment one difference lies in：Including at least one first sand core 4 with
Sand mold, first sand core 4 are matched with sand mold, and combination between the two is as described in embodiment one.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but not to this practicality newly
The limitation of type protection domain, those skilled in the art should understand that, based on the technical solution of the present invention, ability
Field technique personnel need not make the creative labor the various modifications or changes that can be made still in the protection model of the utility model
Within enclosing.
Claims (10)
1. a kind of sand casting sand core combination structure, it is characterized in that：Including at least one first sand core and counterpart, the cooperation
Part is the second sand core or sand mold；
The first sand core end set has core print, is arranged on counterpart fluted；
The core print coordinates with groove gap, is formed with sand core gap.
2. a kind of sand casting sand core combination structure as described in claim 1, it is characterized in that：The first sand core length is more than
500mm, thickness are less than 50mm.
3. a kind of sand casting sand core combination structure as described in claim 1, it is characterized in that：The core print is trapezium structure,
Correspondingly, the groove is similarly trapezium structure.
4. a kind of sand casting sand core combination structure as described in claim 1, it is characterized in that：The core print end face and groove ends
It is provided with the first gap between face, the second gap is provided between core print side and groove side, the first gap is more than between second
Gap；
The sand core gap includes the first gap and the second gap.
5. a kind of sand casting sand core combination structure as claimed in claim 4, it is characterized in that：First interstice coverage is 6
~9mm, second interstice coverage are 3~5mm.
6. a kind of sand casting sand core combination structure as described in claim 1, it is characterized in that：The core print side and groove side
Face is provided with several notches, and fire sealer is provided in notch；
Alternatively, core print side is provided with several notches, and fire sealer is provided in notch.
7. a kind of sand casting sand core combination structure as claimed in claim 6, it is characterized in that：The groove be it is arc-shaped,
Quantity is set as 2~6.
8. a kind of sand casting sand core combination structure as claimed in claim 6, it is characterized in that：The fire sealer is asbestos
Rope.
9. a kind of sand casting sand core combination structure as described in claim 1, it is characterized in that：First sand core is thin-walled gas
Road sand core, length range are 800mm~1200mm；
Second sand core is inner cavity sand core.
10. a kind of gas turbine cylinder, it is characterized in that：It is combined by the sand casting sand core described in any one of claim 1-9
Structure is cast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721901772.8U CN207770759U (en) | 2017-12-29 | 2017-12-29 | A kind of sand casting sand core combination structure and gas turbine cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721901772.8U CN207770759U (en) | 2017-12-29 | 2017-12-29 | A kind of sand casting sand core combination structure and gas turbine cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN207770759U true CN207770759U (en) | 2018-08-28 |
Family
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| CN201721901772.8U Active CN207770759U (en) | 2017-12-29 | 2017-12-29 | A kind of sand casting sand core combination structure and gas turbine cylinder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110756739A (en) * | 2019-11-06 | 2020-02-07 | 中国第一汽车股份有限公司 | Cylinder cover unloading groove sand core casting process and cylinder cover |
| CN112122554A (en) * | 2020-09-30 | 2020-12-25 | 大连金河铸造有限公司 | Positioning method of slender sand core for casting |
| CN112157224A (en) * | 2020-09-30 | 2021-01-01 | 大连金河铸造有限公司 | Sand core structure for elongated hole casting and positioning method |
| CN113333685A (en) * | 2021-04-27 | 2021-09-03 | 宁波茸发新材料科技有限公司 | Casting method of small ductile iron valve body |
-
2017
- 2017-12-29 CN CN201721901772.8U patent/CN207770759U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110756739A (en) * | 2019-11-06 | 2020-02-07 | 中国第一汽车股份有限公司 | Cylinder cover unloading groove sand core casting process and cylinder cover |
| CN112122554A (en) * | 2020-09-30 | 2020-12-25 | 大连金河铸造有限公司 | Positioning method of slender sand core for casting |
| CN112157224A (en) * | 2020-09-30 | 2021-01-01 | 大连金河铸造有限公司 | Sand core structure for elongated hole casting and positioning method |
| CN112157224B (en) * | 2020-09-30 | 2021-12-21 | 大连金河铸造有限公司 | Sand core structure for elongated hole casting and positioning method |
| CN113333685A (en) * | 2021-04-27 | 2021-09-03 | 宁波茸发新材料科技有限公司 | Casting method of small ductile iron valve body |
| CN113333685B (en) * | 2021-04-27 | 2023-03-10 | 宁波茸发新材料科技有限公司 | Casting method of small ductile iron valve body |
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