CN113477886A - Casting system and casting process for steam turbine cylinder body casting - Google Patents
Casting system and casting process for steam turbine cylinder body casting Download PDFInfo
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- CN113477886A CN113477886A CN202110786792.XA CN202110786792A CN113477886A CN 113477886 A CN113477886 A CN 113477886A CN 202110786792 A CN202110786792 A CN 202110786792A CN 113477886 A CN113477886 A CN 113477886A
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- 238000005266 casting Methods 0.000 title claims abstract description 135
- 239000004576 sand Substances 0.000 claims abstract description 78
- 238000001816 cooling Methods 0.000 claims abstract description 45
- 239000002893 slag Substances 0.000 claims abstract description 39
- 239000002826 coolant Substances 0.000 claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 238000005496 tempering Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000004513 sizing Methods 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 62
- 208000015943 Coeliac disease Diseases 0.000 description 20
- 230000007547 defect Effects 0.000 description 7
- 239000013049 sediment Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 210000003437 trachea Anatomy 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The application relates to the technical field of steam turbine cylinder body casting, in particular to a pouring system and a casting process for a steam turbine cylinder body casting, wherein the pouring system for the steam turbine cylinder body casting comprises a pouring gate device arranged in a sand mold, a plurality of slag collecting tables which are communicated with the pouring gate device and positioned on a parting surface of the sand mold, a plurality of risers fixedly connected with the casting, a plurality of internal chill connected with the inner side surface of the casting, a plurality of external chills connected with the outer side surface of the casting, a plurality of cooling pipes arranged in the sand mold and a cooling medium generating device communicated with one end of each cooling pipe; and the pouring gate device, the slag collecting platform, the riser, the internal chill and the external chill are communicated with the pouring cavity of the sand mold. This application can improve the sand sticking problem in the steam turbine cylinder body foundry goods casting process, makes the casting process operation more convenient.
Description
Technical Field
The application relates to the technical field of steam turbine cylinder body casting, in particular to a pouring system and a casting process for a steam turbine cylinder body casting.
Background
At present, an inner cylinder body and an outer cylinder body of a steam turbine are main castings of the steam turbine, bear the pressure difference of gas inside and outside the cylinder along the axial direction, the acting force of the weight of the cylinder body, a pipeline and the like, and also bear thermal stress and deformation caused by uneven temperature distribution.
In the related technology, the steam turbine cylinder body is often easy to have the defects of sand sticking, slag inclusion and the like during casting, so that a casting is caused, the excavation and repair volume is too large, the casting is difficult to repair, the operation of the casting process is complex, and the quality of the casting is poor.
Accordingly, there is a need for a steam turbine block casting gating system and casting process that ameliorates the above problems.
Disclosure of Invention
In order to improve the problem of sand adhesion in the casting process of a steam turbine cylinder body casting and enable the casting process to be operated more conveniently, the application provides a pouring system and a casting process of the steam turbine cylinder body casting.
In a first aspect, the application provides a steam turbine cylinder casting gating system, adopts following technical scheme:
a pouring system for a steam turbine cylinder body casting is used for pouring the casting in a cavity of a sand mold and comprises a pouring gate device arranged in the sand mold, a plurality of slag collecting platforms which are communicated with the pouring gate device and are positioned on a parting surface of the sand mold, a plurality of dead heads fixedly connected with the casting, a plurality of internal chill connected with the inner side surface of the casting, a plurality of external chill connected with the outer side surface of the casting, a plurality of cooling pipes arranged in the sand mold and a cooling medium generating device communicated with one end of each cooling pipe;
and the pouring gate device, the slag collecting platform, the riser, the internal chill and the external chill are communicated with the pouring cavity of the sand mold.
By adopting the technical scheme, the pouring gate device is used for pouring molten metal, the riser can reduce the shrinkage cavity and shrinkage porosity of the casting, the internal chill and the external chill can play a chilling role, the shrinkage cavity and the shrinkage porosity at the local hot spot of the casting are further eliminated, and the quality of the casting is improved. The cooling pipe and the cooling medium generating device can dissipate heat in thick-wall cavities around the sand mold, so that the problem of overlarge repair volume of the casting caused by the defects of sand sticking and slag inclusion is avoided, the operation of the casting process is more convenient, the production cost is reduced, and the production period is shortened.
Optionally, the runner device comprises a sprue cup, a sprue communicated with the bottom of the sprue cup and a cross runner communicated with the bottom end of the sprue cup.
By adopting the technical scheme, the molten metal is poured from the pouring cup, then sequentially passes through the sprue and the cross gate, and finally is gradually filled in the cavity of the sand mold, so that the pouring process is completed.
Optionally, the cross-sections of the sprue and runner are circular.
By adopting the technical scheme, the cross sections of the sprue and the cross gate are circular, so that shrinkage cavities and shrinkage porosity of the steam turbine cylinder body casting can be prevented, and the quality of the casting is improved.
Optionally, the sprue is vertically connected to the runner.
Through adopting above-mentioned technical scheme, the sprue is connected with the runner is perpendicular, enables the molten metal like this and gets into the runner from the sprue fast, avoids making near the sand mould of sprue too much of being heated to reduce the phenomenon of sand sticking and inclusion sediment.
Optionally, the diversion point of the cross runner is centrally arranged.
By adopting the technical scheme, when the molten metal reaches the middle position of the cavity of the sand mold from the cross gate, the molten metal gradually diffuses to the periphery from the shunting point of the cross gate, so that the casting quality of the cylinder casting molded by casting is better.
Optionally, the inner wall of the pouring cup is an inclined surface which inclines downwards.
By adopting the technical scheme, the arrangement of the inclined surface can enable the molten metal to generate an initial speed in the pouring cup, so that the time for the molten metal to pass through the pouring gate device is shortened, the pouring speed is improved, and the casting efficiency is further improved.
Optionally, the slag collecting platform comprises a slag collecting bag arranged on the parting surface of the sand mold and a slag collecting column arranged on the slag collecting bag.
Through adopting above-mentioned technical scheme, the collection sediment post on the collection sediment package makes the dross through collection sediment post rebound, avoids being stained with a lot of residues on the foundry goods, makes the foundry goods clearance process in later stage more convenient and fast, improves casting efficiency.
Optionally, the cooling medium generating device includes an air compressor and an air pipe communicated with an air outlet of the air compressor;
the air pipe is communicated with the cooling pipe.
Through adopting above-mentioned technical scheme, the air compressor can the compressed air to use the compressed air as coolant, input coolant in to the cooling tube through the trachea, in order to reach the purpose of heat exchange, improve the radiating effect in the sand mould.
Optionally, the cooling pipe is arranged in a U shape.
Through adopting above-mentioned technical scheme, because the lateral surface of cylinder body is the arc surface, and the lateral surface that enables the cooling tube more to laminate the foundry goods is arranged for the U type to the cooling tube in this application to obtain better radiating effect.
In a second aspect, the present application provides a casting process of a steam turbine block casting, using the gating system of any one of claims to, comprising the steps of:
respectively manufacturing a model according to the cylinder body castings;
manufacturing a sand mold by using the pattern;
arranging a gating system in the process of manufacturing the sand mold;
pouring molten metal into the sand mold through a pouring gate device;
cooling and forming the cylinder body casting, wherein a cooling medium generating device is used for conveying a cooling medium into a cooling pipe in the cooling process, so that the cooling medium is exchanged with heat in the sand mold, and the heat dissipation effect of the sand mold is improved;
and (3) sand removal and heat treatment, carrying out sand falling after cooling for 20 days, then cutting a riser, putting the riser downwards on a gasket on a sizing block, and immediately carrying out normalizing and tempering on the cylinder body casting after the riser is cut.
By adopting the technical scheme, the casting process of the steam turbine cylinder body casting is more convenient and quicker, the defects of sand adhesion and slag inclusion are reduced, the quality of the casting is improved, and the casting cleaning work after casting molding is more convenient.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the pouring gate device in the application is used for pouring molten metal, the riser can reduce the shrinkage cavity and the shrinkage porosity of the casting, the internal chill and the external chill can play a chilling role, and then the shrinkage cavity and the shrinkage porosity at the local hot spot of the casting are eliminated, and the quality of the casting is improved. The cooling pipe and the cooling medium generating device can dissipate heat in the thick-wall cavity around the sand mold, so that the problem of overlarge repair volume of the casting caused by the defects of sand sticking and slag inclusion is avoided, the operation of the casting process is more convenient, the production cost is reduced, and the production period is shortened;
2. the cross sections of the straight pouring channel and the cross pouring channel are circular, so that the shrinkage cavity and shrinkage porosity of the steam turbine cylinder body casting can be prevented, and the quality of the casting is improved;
3. the air compressor in this application can compressed air to use compressed air as coolant, through the trachea to input coolant in the cooling tube, with the purpose that reaches the heat exchange, improve the radiating effect in the sand mould.
Drawings
FIG. 1 is a schematic overall structure diagram of a steam turbine block casting gating system disclosed in an embodiment of the application.
FIG. 2 is a schematic structural diagram of another view angle of a pouring system of a steam turbine block casting, except for a cooling medium generating device, according to the embodiment of the application.
FIG. 3 is a block diagram of steps in a steam turbine block casting process, according to an embodiment of the present disclosure.
Description of reference numerals: 11. a runner device; 111. a pouring cup; 112. a sprue; 113. a cross gate; 21. a slag collection platform; 211. collecting a slag ladle; 212. a slag collecting column; 31. a riser; 41. internal chill; 51. external chill; 61. a cooling tube; 71. a cooling medium generating device; 711. an air compressor; 712. the trachea.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
It can be understood that, in the related art, the steam turbine cylinder body casting is divided into an upper half casting and a lower half casting, and the casting can be performed by adopting an integrated casting method, an ingate casting system is required to be used for the integrated casting, and the two sand molds are manufactured and then subjected to mould assembling casting operation, so that the cylinder body casting is obtained after the casting is completed. In the pouring process, because the general pouring temperature is more than 1500 ℃, and the end surface of the casting is in a semi-closed state, the thick-wall cavity of the sand mold is burnt by high-temperature molten metal for a long time, the heating temperature of the sand mold is high, the problems of sand sticking, slag inclusion and the like are easily generated, and further, the inner cavity has defects, at the moment, the defect needs to be removed from the outer side by damaging the casting, so that the repair volume is easily overlarge, and the operation difficulty and the production cost in the casting process of the casting are increased. To this end, the present application provides a steam turbine cylinder casting gating system and casting method to ameliorate the above problems.
The embodiment of the application discloses a pouring system for a steam turbine cylinder body casting. Referring to fig. 1, a pouring system for steam turbine cylinder castings comprises a pouring gate device 11, a slag collecting platform 21, a riser 31, an internal chill 41, an external chill 51, a cooling pipe 61 and a cooling medium generating device 71. Wherein, runner device 11 arranges in the sand mould, and the quantity of collection sediment platform 21 is a plurality of, and collection sediment platform 21 sets up in the sand mould and communicates with runner device 11. The multiple risers 31 are embedded in the sand mold and fixedly connected with the casting, the internal chill 41 is connected with the inner side surface of the casting, the external chill 51 is connected with the outer side surface of the casting, the cooling pipe 61 is embedded in the sand mold, the cooling medium generating device 71 is communicated with one end of the cooling pipe 61 and used for providing cooling medium for the cooling pipe 61, and the heat dissipation effect of the sand mold is better. The runner device 11, the slag collection table 21, the riser 31, the internal chill 41, and the external chill 51 are all communicated with the casting cavity of the sand mold, and constitute a path through which the molten metal flows and a molding space.
Specifically, referring to fig. 1 and 2, the runner device 11 includes a pouring cup 111, a sprue 112, and a runner 113. The pouring cup 111 is a cup body with an open upper end, and in a possible embodiment of the present invention, the inner wall of the pouring cup 111 is an inclined surface inclined downward, so that the pouring liquid obtains a certain initial velocity before entering the sprue, thereby increasing the pouring velocity. The sprues 112 are arranged in the sand mold along the vertical direction, the number of the sprues 112 is multiple, the plurality of the sprues 112 are arranged in the sand mold at intervals, and the liquid inlet end of one of the sprues 112 is communicated with the liquid discharge end of the pouring cup 111. The horizontal runner 113 is composed of a plurality of runners which are arranged in a staggered manner on the same horizontal plane, and the horizontal runner 113 is communicated with the bottom end of the sprue 112. Typically, the sprue 112 is vertically connected to the runner 113.
In order to avoid the shrinkage cavity phenomenon in the pouring process, the cross sections of the straight pouring channel 112 and the horizontal pouring channel 113 are circular, so that the shrinkage cavity and shrinkage porosity of the steam turbine cylinder body casting can be prevented, and the quality of the casting is improved.
In order to enable the poured molten metal to diffuse from the middle position of the bottom of the sand mold to the periphery at the same time and improve the success rate of one-time pouring molding, the shunting point of the transverse pouring gate 113 is arranged at the middle position, namely the molten metal flows to the middle position first and then diffuses uniformly to the periphery of a cavity in the sand mold after entering the transverse pouring gate 113 from one of the straight pouring gates 112 until the pouring is finished.
Referring to fig. 1, the slag collection platform 21 includes a slag collection bag 211 disposed on a parting surface of the sand mold and a slag collection column 212 disposed on the slag collection bag 211. Specifically, the slag collecting bag 211 is of a rectangular plate-shaped structure, one surface of the slag collecting bag 211 is flush with a parting surface of a sand mold, the slag collecting column 212 is of a cylindrical structure, and the bottom end of the slag collecting column 212 is vertically and fixedly connected to the upper surface of the slag collecting bag 211. The number of the slag collecting tables 21 may be plural, and in general, the number of the slag collecting tables 21 is four, and the slag collecting tables are provided at intervals on the parting surfaces of the regrind molds.
Referring to fig. 1 and 2, the feeder 31 may be made of refractory fiber and quartz sand, and the cavity of the feeder 31 is a cavity for storing liquid metal, and is used for supplying molten metal when a casting is formed, so as to prevent shrinkage cavity, shrinkage porosity, exhaust and slag collection. The number of the risers 31 can be multiple, the cross section of each riser 31 can be waist-shaped and/or round, in the embodiment of the application, the number of the waist-shaped risers 31 is two, the number of the round risers 31 is two, and the bottom ends of the risers 31 are integrally connected with the cylinder casting.
Referring to fig. 1 and 2, the internal chill 41 may be made of tin-plated or low-carbon steel coated with anti-sticking film slurry, the number of internal chills 41 is plural, the internal chills 41 are welded to the inner side of the casting, the internal chills 41 can eliminate shrinkage cavity and shrinkage porosity at the local hot spot of the casting, prevent the casting from cracking, improve the hardness and wear resistance of the casting, and further improve the quality of the casting.
Referring to fig. 1 and 2, the cooling tube 61 may be a high temperature resistant hose, generally, the diameter of the cooling tube 61 is 20 to 49 mm, and the number of the cooling tubes 61 may be one or more. In the embodiment of the application, the number of the cooling pipes 61 is one, and the cooling pipes 61 are buried in the sand mold, in the possible implementation mode of the application, the cooling pipes 61 are arranged in the sand mold in a U shape, when the cooling medium flows in the cooling pipes 61, the heat in the sand mold can be taken away by the cooling medium, so that the heat dissipation effect of the sand mold is better, the defects of sand sticking and slag inclusion are effectively reduced, and the quality of castings is improved.
Referring to fig. 1, the cooling medium generating device 71 includes an air compressor 711 and an air pipe 712, the air compressor 711 may be placed on the ground beside the sand mold of the casting, and the air compressor 711 is used for generating compressed air and delivering the compressed air to the cooling pipe 61 through the air pipe 712. Both ends of the air pipe 712 communicate with the exhaust end of the air compressor 711 and the intake end of the cooling pipe 61, respectively. Generally, the air blowing time of the air compressor 711 is 10 hours, and the compressed air pressure is 0.4 mpa to 0.5 mpa.
The embodiment of the application also discloses a casting process of the steam turbine cylinder casting, which uses the casting system of the steam turbine cylinder casting disclosed in the embodiment, and please refer to fig. 3, the casting process comprises the following steps:
s101, respectively manufacturing a model according to the cylinder body castings;
firstly, respectively manufacturing an upper half casting pattern and a lower half casting pattern of the cylinder casting according to a cylinder casting drawing for later use.
S102, manufacturing a sand mold by using a pattern;
and (4) manufacturing a sand mold by using the manufactured casting pattern for standby.
S103, a pouring system is arranged in the process of manufacturing the sand mold;
when the sand mold is manufactured, the pouring gate device 11, the external chill and the cooling pipe 61 can be pre-embedded, and then the slag collecting platform 21, the riser 31, the internal chill 41 and the external chill 51 in the pouring system are arranged in the sand mold.
S104, pouring molten metal into the sand mold through a pouring gate device 11;
the molten metal used for casting should be rapidly decarburized when the molten steel temperature of the molten metal reaches more than 1600 ℃ in the heating process, then the molten metal is deoxidized by using an aluminum block to prevent secondary oxidation, and the molten metal needs to be stood for more than 10 minutes before casting. Molten metal is poured from a pouring cup 111 of the pouring device 11 so that the molten metal cast fills the cavity of the entire sand mold. During pouring, the molten metal is ensured to flow into the cavity of the sand mold stably, rapidly and continuously through the pouring gate device 11.
S105, cooling and forming the cylinder body casting;
in the cooling process, a cooling medium generating device 71 is used for conveying a cooling medium into the cooling pipe 61, so that the cooling medium is exchanged with heat in the sand mold, and the heat dissipation effect of the sand mold is improved;
and S106, sand removal and heat treatment, namely, cooling the steam turbine cylinder body gradually for 20 days, then performing sand falling, cutting the riser 31 after cooling is completed, putting the riser downwards on the shim plate, and immediately performing normalizing and tempering on the cylinder body casting after the riser 31 is cut. Specifically, the normalizing temperature is 930 ℃ to 950 ℃, and the tempering temperature is 690 ℃ to 730 ℃. The upper half cylinder body and the lower half cylinder body after the heat treatment can be fixedly connected through bolts. Tempering and holding time is selected according to the wall thickness, and the temperature of the casting needs to be reduced to below 300 ℃ before the air cooling operation.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a steam turbine cylinder body foundry goods gating system for pour into a mould casting in the die cavity of sand mould, its characterized in that: the casting device comprises a pouring gate device (11) arranged in a sand mold, a plurality of slag collecting platforms (21) which are communicated with the pouring gate device (11) and are positioned on a parting surface of the sand mold, a plurality of risers (31) fixedly connected with a casting, a plurality of internal chills (41) connected with the inner side surface of the casting, a plurality of external chills (51) connected with the outer side surface of the casting, a plurality of cooling pipes (61) arranged in the sand mold and a cooling medium generating device (71) communicated with one end of each cooling pipe (61);
the pouring gate device (11), the slag collecting platform (21), the riser (31), the internal chill (41) and the external chill (51) are all communicated with a pouring cavity of the sand mold.
2. The steam turbine cylinder casting gating system of claim 1, wherein: the pouring channel device (11) comprises a pouring cup (111), a straight pouring channel (112) communicated with the bottom of the pouring cup (111) and a cross pouring channel (113) communicated with the bottom end of the straight pouring channel (112).
3. The steam turbine cylinder casting gating system of claim 2, wherein: the cross sections of the sprue (112) and the cross runner (113) are circular.
4. The steam turbine cylinder casting gating system of claim 3, wherein: the sprue (112) is vertically connected with the cross runner (113).
5. The steam turbine cylinder casting gating system of claim 4, wherein: the branch point of the cross gate (113) is arranged in the center.
6. The steam turbine cylinder casting gating system of claim 2, wherein: the inner wall of the pouring cup (111) is an inclined surface which inclines downwards.
7. The steam turbine cylinder casting gating system of claim 1, wherein: the slag collecting platform (21) comprises a slag collecting bag (211) arranged on the parting surface of the sand mold and a slag collecting column (212) arranged on the slag collecting bag (211).
8. The steam turbine cylinder casting gating system of claim 1, wherein: the cooling medium generating device (71) comprises an air compressor (711) and an air pipe (712) communicated with an exhaust port of the air compressor (711);
the air pipe (712) is communicated with the cooling pipe (61).
9. The steam turbine cylinder casting gating system of claim 1, wherein: the cooling pipe (61) is arranged in a U shape.
10. A steam turbine block casting process using the gating system of any one of claims 1 to 9, comprising the steps of:
respectively manufacturing a model according to the cylinder body castings;
manufacturing a sand mold by using the pattern;
arranging a gating system in the process of manufacturing the sand mold;
pouring molten metal into the sand mold through a pouring gate device (11);
cooling and forming the cylinder body casting, wherein a cooling medium generating device (71) is used for conveying a cooling medium into a cooling pipe (61) in the cooling process, so that the cooling medium is exchanged with heat in the sand mold, and the heat dissipation effect of the sand mold is improved;
and (3) sand removal and heat treatment, carrying out sand falling after cooling for 20 days, then cutting a riser (31), putting the riser downwards on a gasket on a sizing block, and immediately carrying out normalizing and tempering on the cylinder body casting after cutting the riser (31).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110786792.XA CN113477886A (en) | 2021-07-12 | 2021-07-12 | Casting system and casting process for steam turbine cylinder body casting |
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| CN202110786792.XA CN113477886A (en) | 2021-07-12 | 2021-07-12 | Casting system and casting process for steam turbine cylinder body casting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951586A (en) * | 2022-05-30 | 2022-08-30 | 阿诺诗(广东)精密金属科技有限公司 | Cold and hot paste application structure of precision casting and application method thereof |
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| CN103418776A (en) * | 2013-09-03 | 2013-12-04 | 宁夏共享集团有限责任公司 | Box pressing and mold dismantling method of large-scale steel casting |
| CN103846392A (en) * | 2014-03-27 | 2014-06-11 | 宁波强盛机械模具有限公司 | Casting method of steering knuckle of nodular cast iron |
| CN104942238A (en) * | 2015-06-30 | 2015-09-30 | 四川德恩精工科技股份有限公司 | Non-riser non-chill casting method for belt pulley |
| CN105798232A (en) * | 2016-03-29 | 2016-07-27 | 南通超达装备股份有限公司 | Mold and casting method of evanescent mold casting part |
| CN106583657A (en) * | 2016-12-13 | 2017-04-26 | 山西平阳重工机械有限责任公司 | Solidification and feeding method for complicated annular thin-wall shell steel casting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114951586A (en) * | 2022-05-30 | 2022-08-30 | 阿诺诗(广东)精密金属科技有限公司 | Cold and hot paste application structure of precision casting and application method thereof |
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