CN107931535A - A kind of arbor and its manufacture method of spiral case sand cores of castings - Google Patents
A kind of arbor and its manufacture method of spiral case sand cores of castings Download PDFInfo
- Publication number
- CN107931535A CN107931535A CN201711202627.5A CN201711202627A CN107931535A CN 107931535 A CN107931535 A CN 107931535A CN 201711202627 A CN201711202627 A CN 201711202627A CN 107931535 A CN107931535 A CN 107931535A
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- CN
- China
- Prior art keywords
- arbor
- radiation beam
- spiral case
- castings
- outer ring
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/106—Vented or reinforced cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- 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
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The present invention relates to the arbor and its manufacture method of a kind of spiral case sand cores of castings for large-scale compressor in casting technology field, wherein arbor includes concentric outer ring arbor and inner ring arbor, the radiation beam that some radial directions are set is connected with the inner ring arbor and outer ring arbor, the outer ring arbor is located at the central area of the chicane sand core of spiral case, the inner ring arbor is located on the inside of spiral case narrow slit position, it is characterized in that, the radiation beam outer end is extend out on the outside of the arbor of outer ring, the inner side of inner ring arbor is stretched into the inner, the radiation beam is the hollow structure of perforation, the radiation beam both ends are connected to the cooling tube of logical cooling gas disengaging respectively.The arbor structure of the present invention, using the radiation beam of hollow structure, cooling gas is led in casting process and forces cooling, temperature is excessive when preventing the arbor of narrow neck part from pouring into a mould and the problem of intensity decreases moulding narrow neck part sand core is broken.
Description
Technical field
The present invention relates to casting technology field, more particularly to a kind of arbor for large-scale compressor spiral case sand cores of castings and
Its manufacture method.
Background technology
Air compressor is a kind of common equipment of industrial circle, and to produce compressed air, wherein spiral case is centrifugal
The core component of compressor.The inner surface of spiral case is irregular surface structure, is generally produced using forging type, its structure is as schemed
Shown in 1 and Fig. 2, the design feature of spiral case 1 for section gradual change Cyclotron passage 1A and passage 1A walls towards centre of gyration side
The one week narrow slit 1B structure set inwardly.The sand core structure of casting is as shown in figure 3, cylinder ring for forming passage 1A
Shape passage sand core 2A is connected by forming the thin neck sand core 2B of narrow slit with the cylinder core print 2C at center, is formed one typical " big
Thin neck " balanced core, during cast, passage sand core 2A is surrounded by high desnity metal liquid, is subject to great buoyancy, is formed narrow
" thin neck " position of the thin neck sand core 2B of seam is easily broken, and the passage sand core 2A Float upward functions of " major part ", cause top skin
Thick deficiency, or even transdermally.
To avoid the above problem, conventional resolving ideas is the skin depth position castingin stud on casting pouring direction top,
To resist the Float upward function of sand core, but stud is surrounded by high temperature fluent metal, and the temperature of stud quickly raises, and stud material is in itself
Intensity quickly reduce, so as to buoyancy can not be resisted and deformed.Or stud can resist the buoyancy of sand core, but pacify
Buoyancy cannot be resisted under the high temperature conditions and be damaged by putting the sand core surface at stud, or stud can not be melted with matrix
Close, so that it is not recommended that a large amount of use.
Again because the intensity of sand core is relatively low, elevated temperature strength is particularly, steel/irony girder structure is embedded in sand core moulding and is served as
Arbor is conducive to improve the intensity and rigidity of sand core.Publication No. CN105945231A, entitled " the anti-drift of spiral case class sand cores of castings
In the application for a patent for invention specification of core bending resistance arbor ", sand is increased by the method for increasing arbor size and arbor spoke density
Core intensity.This scheme can improve the rigidity of sand core to a certain extent, but actual effect, than relatively limited, reason is spiral case
Narrow slit structure limits the size of " thin neck " place's arbor, only increases the size of arbor and " thin neck " place arbor top and bottom will be caused not have
There is molding sand, arbor is directly contacted with high-temperature liquid metal, causes arbor temperature to raise, intensity decreases, and is occured bending and deformation.In addition
Due to arbor directly and molten metal contacts, arbor can also form metal stronger chilling action, similar chill, will cause herein
Casting graphite form exception and stiffness issue.
The content of the invention
The present invention for compressor shell sand cores of castings in the prior art " the thin neck of major part " structure in casting process by
The problem of buoyancy is yielding, there is provided a kind of arbor of spiral case sand cores of castings, to overcome the change of narrow neck part in casting process
Shape and breakage problem.
The object of the present invention is achieved like this, a kind of arbor of spiral case sand cores of castings, including concentric outer ring arbor and
Inner ring arbor, the radiation beam that some radial directions are set is connected with the inner ring arbor and outer ring arbor, and the outer ring arbor is located at
The central area of the chicane sand core of spiral case, the inner ring arbor is located at the inner side at spiral case narrow slit position, described to radiate outside beam
End is extend out on the outside of the arbor of outer ring, and the inner side of inner ring arbor is stretched into the inner, described to radiate hollow structure of the beam for perforation, the spoke
She Liang both ends are connected to the cooling tube of logical cooling gas disengaging respectively.
The sand core rod structure of the present invention, high temperature strength is in for the core sand arbor of narrow neck part in casting process
The problem of reduction, be designed to that inner ring arbor and outer ring arbor are respectively used to strengthen sand core access sites and center core head by arbor
The intensity of position, inner ring arbor is connected with outer ring arbor by radiating beam, and radiates the hollow structure that beam is designed as perforation, and
Be connected with the air inlet pipe and air outlet pipe for cooling, in casting process to radiation beam hollow channel in lead to cooling gas into
Row forces cooling, to ensure that radiation beam is in relatively low temperature, so for the radiation beam for being primarily subjected to flexural deformation, because hollow
Structure can't cause the rigidity of beam too big loss, and carry out forcing cooling then can at utmost to ensure by hollow-core construction
Rigidity of the arbor in use state, so as to prevent that radiation beam occurs bending and deformation and draws under the action of sand core buoyancy during cast
Play the sand core fracture of narrow neck part.Arbor structure using the present invention, can reduce the sectional dimension of arbor relatively, and can be appropriate
The quantity that beam is radiated in arbor structure is reduced, so as to reach optimization arbor structure, the purpose for preventing sand core to be broken.
For ease of the fixation of arbor main body, the outer ring arbor edge extends the core print outside the corresponding volute air-inlet mouth of sand core
Position.
The arbor of narrow neck part to prevent from forcing to cool down forms potting syrup around chilling action, and the radiation beam corresponds to
The periphery at casting narrow slit position, which is brushed, high temperature resistant foundry facing, and corresponding periphery is enclosed with asbestos cloth.
Preferably, the radiation beam is hollow rhs-structure to one kind as the present invention.
For ease of the making of arbor, the sand core rod passes through integral casting forming.
The present invention also provides a kind of manufacture method of above-mentioned spiral case sand cores of castings arbor, case moulding is buried using evaporative pattern apperance
After pour into a mould, when evaporative pattern makes, be embedded castingin pipe in the hollow part of radiation beam, and the both ends of each castingin pipe are stretched out and disappear
The length at mould both ends is 50-60mm.In the sand core rod production method of the present invention, for the overall structure of arbor thorn, using disappearing
The integrated poured shaping of mould is lost, can simplify the manufacturing process of arbor, in the disappearance mode structure of arbor, the radiation beam portion of hollow structure
Position, is embedded castingin pipe, and after cast, castingin pipe portion position forms the hollow structure of radiation beam.
To ensure the intensity of radiation beam, the castingin pipe is austenitic stainless steel, and yield strength is more than 400 MPa, wall thickness
For 6-10mm.
Brief description of the drawings
Fig. 1 is the structure diagram of centrifugal compressor spiral case casting.
Fig. 2 is profiles of the Fig. 1 along A-A.
Fig. 3 is the structure diagram of centrifugal compressor spiral case sand cores of castings.
Fig. 4 is the structure diagram of the arbor of the spiral case sand cores of castings of the present invention.
Fig. 5 is arbor, sand core, apperance, cooling tube combination diagram.
Fig. 6 is arbor, casting, the locus schematic diagram of cooling tube.
Wherein, 1 spiral case casting；1A passages, 1B narrow slits；2 sand cores；2A passage sand cores；The thin neck sand cores of 2B：2C cylinder core prints；
3 arbors；3A outer rings arbor；3B inner ring arbors；3C radiates beam；Apperance on 4；5 times apperances；6 cooling tubes.
Embodiment
As shown in figure 4, a kind of arbor of spiral case sand cores of castings for the present invention, including concentric outer ring arbor 3A and inner ring
The radiation beam 3C that some radial directions are set is connected with arbor 3B, inner ring arbor 3B and outer ring arbor 3A, outer ring arbor 3A is located at snail
The central area of the chicane sand core 2A of shell casting 1, inner ring arbor 3B are located at the inner side at spiral case narrow slit 1B positions, radiation beam 3C
Outer end is extend out on the outside of the arbor 3A of outer ring, and the inner side of inner ring arbor 3B is stretched into the inner, and radiation beam 3C is the hollow structure of perforation,
Radiation beam 3C both ends are connected to the cooling tube 6 of cooling gas disengaging respectively.For ease of the fixation of arbor main body, outer ring arbor 3A
Along the core print position extended outside the corresponding volute air-inlet mouth of sand core；To prevent from forcing the arbor of the narrow neck part of cooling to surrounding
Potting syrup forms chilling action, and the periphery brushing that radiation beam 3C corresponds to casting narrow slit position has high temperature resistant foundry facing, and
Corresponding periphery is enclosed with asbestos cloth；To ensure the intensity of radiation beam 3C, it is hollow square tube knot to radiate beam 3C in the present embodiment
Structure；For ease of the making of arbor 3, the arbor of the present embodiment passes through integral casting forming.
The sand core rod structure of the present invention, high temperature strength is in for the core sand arbor of narrow neck part in casting process
The problem of reduction, be designed to that inner ring arbor 3A and outer ring arbor 3B is respectively used to strengthen sand core access sites and center circle by arbor
The intensity at column core print 2C positions, inner ring arbor 3A is connected with outer ring arbor 3B by radiating beam 3C, and radiates beam 3C designs
For the hollow structure of perforation, and the cooling tube for leading to cooling gas is connected with, in casting process into radiation beam 3C
Lead to cooling in empty passage and carry out pressure cooling with gas, to ensure that radiation beam is in relatively low temperature, so for being primarily subjected to
The radiation beam 3C of flexural deformation, because hollow-core construction to the rigidity of beam can't caused by too big loss, and carried out by hollow-core construction
Cooling is forced then can at utmost to ensure rigidity of the arbor in use state, so as to prevent that radiation beam is floated in sand core during cast
Occur bending and deformation under the action of power and cause the sand core of narrow neck part to be broken.To prevent from forcing the radiation beam of cooling narrow to casting
Stitch position potting syrup and produce chilling action, by the narrow neck part swabbing for radiating beam and asbestos cloth is wrapped up, to separate the position spoke
Penetrate beam and surrounding sand core heat transfer.Arbor structure using the present invention, can reduce the sectional dimension of arbor relatively, and can be appropriate
The quantity that beam is radiated in arbor structure is reduced, so as to reach optimization arbor structure, the purpose for preventing sand core to be broken.
The sand core rod of the present embodiment structure has a variety of production methods, according to the design feature of above-mentioned arbor, can use
The sand core rod of the method manufacture present invention of integral casting forming, wherein buried with evaporative pattern apperance pour into a mould after case moulding it is particularly square
Just, when evaporative pattern makes, castingin pipe is embedded in the hollow part of radiation beam, and evaporative pattern two is stretched out at the both ends of each castingin pipe
The length at end is 50-60mm.To ensure the intensity of radiation beam, castingin pipe uses austenitic stainless steel, and yield strength is more than 400
MPa, wall thickness are 6-10mm.
Buried using the evaporative pattern of the present embodiment in the sand core rod method that sample makes the present invention, overall for arbor thorn is tied
Structure, using the integrated poured shaping of evaporative pattern, can simplify the manufacturing process of arbor, in the disappearance mode structure of arbor, hollow structure
Radiation beam portion position, be embedded castingin pipe, after cast, castingin pipe portion position formed radiation beam hollow structure.
As shown in figure 5, the sand core rod of the present invention is made when doing sand core, first to corresponding thin neck in the middle part of radiation beam 3C
Position applies foundry facing, then 3-5 layers of asbestos cloth are wrapped up in periphery, brush high-temperature resistant coating, and place is dried again outside asbestos cloth
Arbor, is then put between the upper apperance 4 of core box and lower apperance 5 by reason, carries out back-up sand operation, the level where back-up sand to arbor
During face, the cooling tube 6 into outlet is respectively arranged at the both ends of each radiation beam, continues back-up sand, and cooling tube edge is extended into center
Cylinder core print 2C above, and expose inlet and outlet.The present invention sand core rod, casting, cooling tube locus schematic diagram such as
Shown in Fig. 6.Cooling extends to the stretching of mo(u)ld top half side during sand mold mould assembly, is accordingly set in upper sand mold and is used to accommodate cooling tube disengaging
The passage of road, from cooling gas outside sand mold during in order to pour into a mould.It is empty generally to start logical cooling compression before casting
Gas or other cooling fluids, force cooling time at least keep to casting complete after 24 it is small when.Proper temperature is cooled in type
Knockout processing is carried out afterwards.Arbor can be taken off by cutting after knockout.
Claims (7)
1. a kind of arbor of spiral case sand cores of castings, including concentric outer ring arbor and inner ring arbor, the inner ring arbor and outer ring
The radiation beam that some radial directions are set is connected with arbor, the outer ring arbor is located at the center of the chicane sand core of spiral case
Domain, the inner ring arbor are located on the inside of spiral case narrow slit position, it is characterised in that the radiation beam outer end is extend out to outside the arbor of outer ring
The inner side of inner ring arbor is stretched into side, the inner, and the radiation beam is the hollow structure of perforation, and the radiation beam both ends connect use respectively
In the cooling tube of logical cooling gas disengaging.
2. the arbor of spiral case sand cores of castings according to claim 1, it is characterised in that the outer ring arbor edge extends sand core
Core print position outside corresponding volute air-inlet mouth.
3. the arbor of spiral case sand cores of castings according to claim 1, it is characterised in that the radiation beam corresponds to casting narrow slit
The periphery at position, which is brushed, high temperature resistant foundry facing, and corresponding periphery is enclosed with asbestos cloth.
4. the arbor of spiral case sand cores of castings according to claim 1, it is characterised in that the radiation beam is hollow square tube
Structure.
5. according to the arbor of claim 1-4 any one of them spiral case sand cores of castings, it is characterised in that the core of the sand core
Bone passes through integral casting forming.
6. the manufacture method of the spiral case sand cores of castings arbor described in a kind of claim 5, it is characterised in that using evaporative pattern apperance
Poured into a mould after burying case moulding, when evaporative pattern makes, castingin pipe, and the both ends of each castingin pipe are embedded in the hollow part of radiation beam
The length for stretching out evaporative pattern radiation beam both ends is 50-60mm.
7. the manufacture method of the arbor of spiral case sand cores of castings according to claim 6, it is characterised in that the castingin pipe is
Austenitic stainless steel, yield strength are more than 400 MPa, and wall thickness is 6-10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711202627.5A CN107931535B (en) | 2017-11-27 | 2017-11-27 | Core bar of volute casing casting sand core and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711202627.5A CN107931535B (en) | 2017-11-27 | 2017-11-27 | Core bar of volute casing casting sand core and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107931535A true CN107931535A (en) | 2018-04-20 |
| CN107931535B CN107931535B (en) | 2019-12-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711202627.5A Active CN107931535B (en) | 2017-11-27 | 2017-11-27 | Core bar of volute casing casting sand core and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107931535B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799051A (en) * | 2022-03-07 | 2022-07-29 | 共享铸钢有限公司 | Casting method of valve casing casting anti-floating core |
| CN116786765A (en) * | 2023-03-14 | 2023-09-22 | 湖州中联机械制造有限公司 | Mud core structure and preparation method thereof |
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|---|---|---|---|---|
| CN1404941A (en) * | 2002-11-04 | 2003-03-26 | 沪东重机股份有限公司 | Method for casting cast-steel piece with deep-long through hole |
| CN201500765U (en) * | 2009-09-28 | 2010-06-09 | 河南欧迪艾铸造有限公司 | Slender cooling core bar for casting |
| CN202732482U (en) * | 2012-08-30 | 2013-02-13 | 桐乡合德机械有限公司 | Integral arbor for cast spiral case parts |
| CN104043783A (en) * | 2014-06-17 | 2014-09-17 | 中核苏阀横店机械有限公司 | Small-caliber high-class valve body casting core |
| CN105945231A (en) * | 2016-06-02 | 2016-09-21 | 共享装备股份有限公司 | Core drifting-prevention and bending-resistance arbor for volute type casting sand core |
-
2017
- 2017-11-27 CN CN201711202627.5A patent/CN107931535B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404941A (en) * | 2002-11-04 | 2003-03-26 | 沪东重机股份有限公司 | Method for casting cast-steel piece with deep-long through hole |
| CN201500765U (en) * | 2009-09-28 | 2010-06-09 | 河南欧迪艾铸造有限公司 | Slender cooling core bar for casting |
| CN202732482U (en) * | 2012-08-30 | 2013-02-13 | 桐乡合德机械有限公司 | Integral arbor for cast spiral case parts |
| CN104043783A (en) * | 2014-06-17 | 2014-09-17 | 中核苏阀横店机械有限公司 | Small-caliber high-class valve body casting core |
| CN105945231A (en) * | 2016-06-02 | 2016-09-21 | 共享装备股份有限公司 | Core drifting-prevention and bending-resistance arbor for volute type casting sand core |
Non-Patent Citations (1)
| Title |
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| 缑鹏森等: "蜗壳", 《金属加工热加工》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799051A (en) * | 2022-03-07 | 2022-07-29 | 共享铸钢有限公司 | Casting method of valve casing casting anti-floating core |
| CN114799051B (en) * | 2022-03-07 | 2023-06-09 | 共享铸钢有限公司 | Casting method for preventing drifting of valve casing casting |
| CN116786765A (en) * | 2023-03-14 | 2023-09-22 | 湖州中联机械制造有限公司 | Mud core structure and preparation method thereof |
| CN116786765B (en) * | 2023-03-14 | 2024-03-19 | 湖州中联机械制造有限公司 | Mud core structure and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107931535B (en) | 2019-12-20 |
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Address after: 750000 No. 298 South st street, Yinchuan economic and Technological Development Zone, the Ningxia Hui Autonomous Region, China Applicant after: Shared Intelligent Equipment Co., Ltd. Address before: 750000 No. 298 South st street, Yinchuan economic and Technological Development Zone, the Ningxia Hui Autonomous Region, China Applicant before: Ningxia Kocel Pattern Co., Ltd. |
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Effective date of registration: 20210819 Address after: 750011 building 4, TMT R & D center, east of No. 5 road, science and Technology Park, Jinfeng District, Yinchuan City, Ningxia Hui Autonomous Region Patentee after: KOCEL INTELLIGENT FOUNDRY INDUSTRY INNOVATION CENTER Co.,Ltd. Address before: 750000 the Ningxia Hui Autonomous Region Yinchuan economic and Technological Development Zone ningshuo South Street No. 298 Patentee before: KOCEL INTELLIGENT EQUIPMENT Co.,Ltd. |
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Effective date of registration: 20211110 Address after: 224599 north of Century Avenue, west of Erkan road and east of Xingfu North Road, Binhai County, Yancheng City, Jiangsu Province Patentee after: Jiangsu gongchi Technology Co., Ltd Address before: 750011 building 4, TMT R & D center, east of No. 5 road, science and Technology Park, Jinfeng District, Yinchuan City, Ningxia Hui Autonomous Region Patentee before: Shared intelligent Casting Industry Innovation Center Co., Ltd |
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