CN107812883B - A kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center - Google Patents
A kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center Download PDFInfo
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- CN107812883B CN107812883B CN201711005040.5A CN201711005040A CN107812883B CN 107812883 B CN107812883 B CN 107812883B CN 201711005040 A CN201711005040 A CN 201711005040A CN 107812883 B CN107812883 B CN 107812883B
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- blade
- ceramic shell
- conjuncted
- ceramic
- thermal center
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- 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
-
- 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
Abstract
The invention discloses a kind of ceramic shell preparation methods for eliminating conjuncted blade blade thermal center, comprising the following steps: S1: the production of conjuncted blade wax mould mould group；S2: the production of conjuncted blade mould group ceramic shell: S21: conjuncted blade wax mould mould group is cleaned；S22: making ceramic shell using leaching mode is stained with, blade mould group conjuncted after cleaning be stained in ceramic slurry and is wrapped up in, and will be stained with the conjuncted blade mould group for having wrapped up in ceramic slurry and carries out sand bed covering in drenching husky machine, is then dried, forms one layer of ceramic shell；S23: repeated several times S22, the i.e. repeatedly production operation of several layers ceramic shell；S24: during step S23, disappearance layer is set in the gap between the ceramic shell of blade mould group, to guarantee the ceramic shell intensity at the blade back and leaf basin of blade, and the generation of thermal center between conjuncted blade can be eliminated；S25: ceramic slurry slurry seal is carried out on the basis of S24 finished product, forms final ceramic shell.
Description
Technical field
The present invention relates to ceramic shell preparation fields, more particularly to a kind of ceramic mould for eliminating conjuncted blade blade thermal center
Shell preparation method.
Background technique
The method that aero engine turbine blades and gas turbine blades all use hot investment casting manufactures.Currently, accurate casting
It makes and is primarily referred to as losing wax hot investment casting, main flow includes: compacting blade and running gate system wax-pattern, is required according to technique by leaf
Piece and running gate system form wax tree；Ceramic shell preparation section is carried out after completing wax-pattern assembling, the preparation of ceramic shell is mainly adopted
It is carried out with the husky mode of slurry leaching is stained with, i.e., carries out leaching sand after one layer of ceramic slurry uniformly being wrapped up on wax tree surface, make complete outside pulp layer
The sand of one layer of refractory material of full uniform fold, after dry a period of time, slurry and refractory material sand constitute ceramic shell
One layer, by be stained with above slurry leaching it is husky in the way of, repeatedly, after ceramic shell reaches certain number of plies, ceramic shell is most
Outer one layer is only stained with slurry, completes ceramic shell preparation；After ceramic shell is sufficiently dry, using dewaxing kettle, at high temperature under high pressure will
Wax-pattern removal, then burns up residual wax, strengthens ceramic shell；Alloy smelting is finally melted, molten steel is poured into preheated formwork, it is complete
At casting, removing surface shell can be obtained Blade roughcast blank.But it often will appear some castings in blade preparation process to lack
It falls into, such as loose, causes blade rejection, influence production efficiency.
Loose is a kind of high-temperature alloy blades casting flaw common during essence casting, and feeding deficiency is when alloy graining
Casting generates the main reason for loose.For guide vane, in order to improve the production efficiency, generally using conjuncted casting, but by
There are gaps between conjuncted blade, be easy to cause sand to accumulate when being stained with slurry leaching sand and preparing formwork, prepare ceramic shell to one
It is easy to make formwork between conjuncted blade to connect together after given layer number, ultimately forms the thermal center 8 in thermal center such as Fig. 4, be easy to make blade
Blade generates rarefaction defect.
Summary of the invention
It is an object of the invention to overcome the above-mentioned problems in the prior art, a kind of conjuncted blade blade of elimination is proposed
The ceramic shell preparation method of thermal center the characteristics of using disappearance layer by heat abstraction, controls the thickness of ceramic shell, prepares ceramic mould
Not only it can guarantee the intensity of formwork at the leaf basin of conjuncted blade when shell, but also the thermal center between conjuncted blade can be eliminated.
The purpose of the present invention is realized by following technical proposals:
A kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center, comprising the following steps:
S1: the production of conjuncted blade wax mould mould group:
Conjuncted blade wax mould mould group is made by welding running gate system and conjuncted blade wax mould, the conjuncted blade includes:
Several blades, curtain plate and inner platform；
S2: the production of ceramic shell:
S21: conjuncted blade wax mould mould group is cleaned；
S22: ceramic shell is made using leaching mode is stained with, blade wax mould mould group conjuncted after cleaning is stained in ceramic slurry
It wraps up in, the conjuncted blade for having wrapped up in ceramic slurry will be stained with and carry out sand bed covering in drenching husky machine, be then dried, form one layer of ceramics
Shell；
S23: repeated several times S22, the i.e. repeatedly production operation of several layers ceramic shell；
S24: during step S23, disappearance layer is set, to guarantee leaf in the gap between the ceramic shell of blade
The blade back of piece and the ceramic shell intensity at leaf basin, and the generation of thermal center between conjuncted blade blade can be eliminated；
S25: ceramic slurry slurry seal package is carried out on the basis of S24 finished product, forms final ceramic shell.
A kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center of the invention, when the setting of the disappearance layer
Machine is the number of plies of ceramic shell intermediate when being 3-7 layers.
A kind of the characteristics of ceramic shell preparation method for eliminating conjuncted blade blade thermal center of the invention, the disappearance layer be
Heated section eliminates, and material is preferably wax disk(-sc), sponge or plank.
A kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center of the invention, the shape of the disappearance layer with
The blade back shape of blade is profile-followed.
A kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center of the invention, the area of the disappearance layer is not
More than the area of blade back.
A kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center of the invention, the disappearance layer and adjacent pottery
The gap of porcelain shell is interference fit.
A kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center of the invention, the disappearance layer are equipped with and take
Portion out, the taking-up portion should stretch out ceramic shell, in order to which the disappearance layer completely eliminates.
According to the above technical scheme, the beneficial effects of the present invention are: proposing a kind of pottery for eliminating conjuncted blade blade thermal center
Porcelain shell preparation method achievees the effect that eliminate rarefaction defect, greatly improve by reducing the formwork thickness between conjuncted blade
The qualification rate of blade cast blank.Compared with current process, the invention operating procedure is simple, and cost is relatively low, high production efficiency, no
Need to change the techniques such as pouring temperature, formwork preheating temperature and running gate system, i.e., with can directly eliminate conjuncted blade blade
Thermal center successfully solves the ceramic shell number of plies and excessively easily causes hot tearing, rarefaction defect and layer to eliminate blade rarefaction defect
Number it is very few be also easy to produce bleed-out, the contradiction between the shell problem that rises, can not only guarantee the intensity of blade blade shell, but also can eliminate conjuncted
Thermal center between blade, and it is applicable not only to solid conjuncted blade, while being also applied for hollow conjuncted blade.
Detailed description of the invention
Fig. 1 is conjuncted blade signal in a kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center of the present invention
Figure；
Fig. 2 is that conjuncted blade is faced in a kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center of the present invention
Figure；
Fig. 3 is C-C sectional view in Fig. 2；
Fig. 4 is the defect map of original method；
Fig. 5 is a kind of procedure chart for the ceramic shell preparation method for eliminating conjuncted blade blade thermal center of the present invention.
Specific embodiment
The present invention is further illustrated with attached drawing combined with specific embodiments below.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention
If Fig. 1-5 is a kind of embodiment for the ceramic shell preparation method for eliminating conjuncted blade blade thermal center of the present invention, one
Kind eliminates the ceramic shell preparation method of conjuncted blade blade thermal center, comprising the following steps:
S1: the production of conjuncted blade wax mould mould group:
Conjuncted blade wax mould mould group is made by welding running gate system 1 and conjuncted 3 wax-pattern of blade, the conjuncted blade 3 wraps
It includes: several blades, curtain plate 2 and inner platform 4；
S2: the production of ceramic shell:
S21: conjuncted blade wax mould mould group is cleaned；
S22: ceramic shell is made using leaching mode is stained with, blade wax mould mould group conjuncted after cleaning is stained in ceramic slurry
It wraps up in, the conjuncted blade for having wrapped up in ceramic slurry will be stained with and carry out sand bed covering in drenching husky machine, be then dried, form one layer of ceramics
Shell 7；
S23: repeated several times S22, the i.e. repeatedly production operation of several layers ceramic shell 7；
S24: during step S23, disappearance layer 9 is set, to guarantee in the gap between the ceramic shell 7 of blade
The blade back 6 of blade and the ceramic shell intensity at leaf basin 5, and the generation of thermal center 8 can be eliminated；
S25: ceramic slurry slurry seal package is carried out on the basis of S24 finished product, forms final ceramic shell 7.
The setting opportunity of the disappearance layer 9 is the number of plies of ceramic shell intermediate when being 3-7 layers.
The material of the disappearance layer 9 is preferably wax disk(-sc), sponge or plank.
The shape of the disappearance layer 9 and 6 shape of blade back of blade are profile-followed.
The area of the disappearance layer 9 is no more than the area of blade back 6.
The gap of the disappearance layer 9 and adjacent ceramic shell is interference fit.
The disappearance layer 9 is equipped with taking-up portion, and the taking-up portion should stretch out ceramic shell 7, in order to which the disappearance layer 9 is complete
It totally disappeared and remove.
Brief process:
It is initially formed conjuncted blade, then will prepare ceramic shell in the way of being stained with slurry leaching sand after conjuncted leaf cleaning,
After one layer of ceramic slurry is uniformly wrapped up on its surface, it is put into leaching Sha Jizhong, makes one layer of fire resisting sand of ceramic slurry surface uniform fold
Son, sufficiently after drying, the sand of ceramic slurry and covering thereon just constitutes the ceramic shell in ceramic shell.It is drenched according to slurry is stained with
Repeatedly, when the ceramic shell number of plies of conjuncted blade is 3 ~ 7 layers, there is seam between conjuncted blade formwork at this time in husky mode
Gap, by 9 fixed placement of disappearance layer between the gap of ceramic shell, certain thickness wax disk(-sc), certain thickness is can be used in disappearance layer
Sponge or the plank profile-followed with blade shell, the thickness and area of eliminating layer can design according to actual needs, thickness range can
0.1 ~ 100mm is taken, length and width can be profile-followed with the blade back of blade according to maximum.Then proceed to the system by the way of being stained with slurry leaching sand
Standby ceramic shell guarantees that eliminating layer 9 should be fixed during shell processed, quick sand, ceramic mould is removed after each layer of ceramic shell system
Shell reaches slurry seal after certain number of plies, completes shell processed, as shown in Figure 5.
Then the ceramic shell prepared is put into dewaxing kettle and is dewaxed, burn residual wax.In the process, disappearance layer 9 removes,
Obtain the ceramic shell that local thickness is controlled.
Pouring molten steel to the ceramic shell prepared after solidification forming, is removed cast(ing) surface type by then molten alloy
The spray of conjuncted blade can be obtained in shell.
The ceramic shell that such local thickness is controlled ensure that the formwork thickness at the leaf basin of blade, pouring molten steel
Afterwards, bleed-out, bulging problem will not be caused since form strength is too low in solidification, ensure that blade dimensions precision；And it eliminates
Thermal center between conjuncted blade, eliminates conjuncted blade blade rarefaction defect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center, which comprises the following steps:
S1: the production of conjuncted blade wax mould mould group:
Conjuncted blade wax mould mould group is made by welding running gate system and conjuncted blade wax mould, the conjuncted blade includes: several
Blade, curtain plate and inner platform；
S2: the production of ceramic shell:
S21: conjuncted blade wax mould mould group is cleaned；
S22: making ceramic shell using leaching mode is stained with, blade wax mould mould group conjuncted after cleaning be stained with using ceramic slurry and is wrapped up in, will
It is stained with the conjuncted blade for having wrapped up in ceramic slurry progress sand bed covering in drenching husky machine, is then dried, forms one layer of ceramic shell；
S23: repeated several times S22, the i.e. repeatedly production operation of several layers ceramic shell；
S24: during step S23, disappearance layer (9) are set in the gap between the ceramic shell of blade, to guarantee leaf
The blade back of piece and the ceramic shell intensity at leaf basin, and the generation of thermal center between conjuncted blade blade can be eliminated；
S25: ceramic slurry slurry seal package is carried out on the basis of S24 finished product, forms final ceramic shell.
2. a kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center according to claim 1, feature exist
In: the setting opportunity of the disappearance layer is the number of plies of ceramic shell be 3-7 layers when.
3. a kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center according to claim 2, feature exist
In: the shape of the disappearance layer and the blade back shape of blade are profile-followed.
4. a kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center according to claim 3, feature exist
In: the area of the disappearance layer is no more than the area of blade back.
5. a kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center according to claim 4, feature exist
In: the gap of the disappearance layer and adjacent ceramic shell is interference fit.
6. a kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center according to claim 5, feature exist
In: the disappearance layer is equipped with taking-up portion, and the taking-up portion should stretch out ceramic shell, in order to which the disappearance layer completely eliminates.
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| CN201711005040.5A CN107812883B (en) | 2017-10-25 | 2017-10-25 | A kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center |
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| CN201711005040.5A CN107812883B (en) | 2017-10-25 | 2017-10-25 | A kind of ceramic shell preparation method for eliminating conjuncted blade blade thermal center |
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| CN107812883A CN107812883A (en) | 2018-03-20 |
| CN107812883B true CN107812883B (en) | 2019-07-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109290519A (en) * | 2018-11-22 | 2019-02-01 | 江苏永瀚特种合金技术有限公司 | A kind of method of local reduction's formwork |
| CN110293208A (en) * | 2019-07-15 | 2019-10-01 | 深圳市万泽中南研究院有限公司 | Shell side method processed and formwork for blade class casting investment pattern precision casting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001252757A (en) * | 2000-03-07 | 2001-09-18 | Ishikawajima Harima Heavy Ind Co Ltd | Method for manufacturing blade lattice structural body |
| CN103071765A (en) * | 2012-12-27 | 2013-05-01 | 清华大学 | Partial air cooling method for precast aperture passage in investment casting shell |
| CN103252451B (en) * | 2013-05-23 | 2016-06-15 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of manufacture method of low pressure guiding triplet hollow blade |
| CN103495702B (en) * | 2013-10-11 | 2016-10-05 | 西安航空动力股份有限公司 | A kind of precision-investment casting method changing casting solidification radiating condition |
| CN105583672B (en) * | 2014-10-23 | 2018-01-23 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of localization method of conjuncted guide vane |
| CN104399889B (en) * | 2014-11-07 | 2016-06-22 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of hulling method after the conjuncted blade model casting of aero-engine |
| CN204220932U (en) * | 2014-11-11 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of six conjuncted guide vane casting moulding systems |
| CN105290337B (en) * | 2015-11-16 | 2017-07-25 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of concatermer blade casting method |
| CN105397027A (en) * | 2015-12-02 | 2016-03-16 | 株洲中航动力精密铸造有限公司 | Casting method of casting |
| CN107008857B (en) * | 2017-04-17 | 2020-11-10 | 东方电气集团东方汽轮机有限公司 | Ceramic mould shell capable of eliminating casting hot cracking defect of variable cross-section part and forming method thereof |
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