CN109317615A - A kind of grouting process for making shell of deep groove structure precision castings - Google Patents
A kind of grouting process for making shell of deep groove structure precision castings Download PDFInfo
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- CN109317615A CN109317615A CN201811408084.7A CN201811408084A CN109317615A CN 109317615 A CN109317615 A CN 109317615A CN 201811408084 A CN201811408084 A CN 201811408084A CN 109317615 A CN109317615 A CN 109317615A
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- Prior art keywords
- shell
- slurry
- groove structure
- deep groove
- layer
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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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Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005495 investment casting Methods 0.000 title claims abstract description 16
- 239000002002 slurry Substances 0.000 claims abstract description 43
- 239000004576 sand Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 10
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 9
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000009415 formwork Methods 0.000 claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 41
- 239000010410 layer Substances 0.000 claims description 25
- 238000002156 mixing Methods 0.000 claims description 12
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 9
- 229910052863 mullite Inorganic materials 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 235000013312 flour Nutrition 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000008267 milk Substances 0.000 abstract description 8
- 210000004080 milk Anatomy 0.000 abstract description 8
- 235000013336 milk Nutrition 0.000 abstract description 8
- 238000012797 qualification Methods 0.000 abstract description 7
- 238000005266 casting Methods 0.000 abstract description 6
- 230000007812 deficiency Effects 0.000 abstract description 4
- 238000005728 strengthening Methods 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 description 5
- 239000005350 fused silica glass Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002114 biscuit porcelain Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Classifications
-
- 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
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
- B22C1/10—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for influencing the hardening tendency of the mould material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of grouting process for making shell of deep groove structure precision castings, which uses zirconium English slurry material and zircon sand by the first two layer of fine sand layer, to ensure that at deep groove structure, shell " bridging " and can not establish suitable investment shell intensity；The second layer takes grouting process after drying, to deep groove structure, and refractory powder and fire sand material are reasonably combined in be in the milk material formula, and ensure that can establish higher investment shell intensity after slurry is dry；Curing agent is used during with slurry, is allowed slurry from strengthening firmly, is reduced influence of the drying process to investment shell intensity at deep trouth, significantly improve the intensity of shell at deep trouth.Deep trouth grouting process solve the problems, such as at deep trouth formwork be not easy to parch, casting " shim " brought by intensity deficiency, improve product qualification rate.
Description
Technical field
The present invention relates to hot investment casting field, the grouting process for making shell of specifically a kind of deep groove structure precision castings.
Background technique
With the fast development of China's aero-engine and gas turbine cause, for the high-temperature mechanics of its key components and parts
Performance requirement is higher and higher, and the precision casting process of high temperature alloy hot-end component and complex structural member just becomes what urgent need was broken through
One of technical bottleneck.Process for making shell as one ring of key in precision casting process, to the dimensional accuracy of product, metallurgical quality and
Qualification rate has vital influence.
For having the precision castings of complicated deep groove structure, according to traditional process for making shell it is difficult to ensure that the formwork at deep trouth is dry
Permeability and intensity, easily generation casting " shim " and " runout " defect, qualification rate are low.
Summary of the invention
The purpose of the present invention is to provide a kind of grouting process for making shell of deep groove structure precision castings, to solve above-mentioned background skill
The problem of being proposed in art.
To achieve the above object, the invention provides the following technical scheme:
A kind of grouting process for making shell of deep groove structure precision castings, includes the following steps:
(1) it is proposed after being totally immersed in zirconium English slurry material after cleaning up wax-pattern, it is uniform on its surface
Sprinkle 100-200 mesh zircon sand after, under 50%-60% relative humidity, the is obtained after spontaneously drying 4-6 hours
One stratotype shell model；
(2) it proposes after dry first layer shell model being immersed in zirconium English slurry material, and is uniformly sprinkled on its surface
It after 100-200 mesh zircon sand, under 50%-60% relative humidity, is dried 4-6 hours with gentle breeze, the second layer is made
Shell model；
(3) deep groove structure implements grouting process, the grouting formula of size of use: WDS ceramic powder 3-7kg, 20-80 mesh is molten
Fused silica sand 2-8kg, 30-100 mesh tekite sand 2-8kg, curing agent 20-120g, silica solution 300-1000g match above-mentioned
The grouting slurry made pours at deep groove structure rapidly, and formwork is put into the drying of surface layer drying room after pulp surface hardening,
Under 50%-60% relative humidity, drying for 24 hours, obtains deep groove structure model；
(4) it is proposed after dry deep groove structure model being immersed in mullite powder slurry, and uniformly sprinkles 30- on its surface
It after 60 mesh do not carry out sand, under 35%-45% relative humidity, is dried no less than 8 hours with high wind, third stratotype is made
Shell model；
(5) it proposes after dry third layer shell model being immersed in mullite powder slurry, and is uniformly sprinkled on its surface
It after 16-30 mesh does not carry out sand, under 35%-45% relative humidity, is dried no less than 8 hours with high wind, is made the 4th
Stratotype shell model, using after same treatment three times layer 7 shell model；
(6) it is proposed after dry layer 7 shell model being immersed in mullite powder slurry, in 35%-45% relative humidity
Under, it is dried no less than 24 hours with high wind, the 8th stratotype shell model is made.
In step (3), grouting slurry is formulated with the following method:
(1) weighed fire resisting flour sand material and curing agent are added to V-type batch mixer, Forced Mixing 8h or more.
(2) silica solution is accurately weighed in beaker A, then accurately weighs the made fire resisting mixing of step 1 in beaker B.
(3) under the quick stirring of glass bar, the fire resisting mixing in beaker B is added in beaker A in 4-5s, manually
10-20s is stirred, then uses machine,massing to stir 20-30s under conditions of 600-1000rpm rapidly required to get arriving
Be in the milk slurry.
Compared with prior art, the beneficial effects of the present invention are:
A kind of grouting process for making shell of deep groove structure precision castings of the invention, the technique pass through the first two layer of zirconium English of reasonable selection
Bisque and be in the milk to deep trouth position, solve as at deep trouth formwork be not easy to parch, casting brought by intensity deficiency
" shim ", greatly improves product qualification rate.
The first two layer of fine sand layer uses zirconium English slurry material and zircon sand, to ensure at deep groove structure shell not " bridging " and energy
Establish suitable investment shell intensity；If surface layer, which is directly in the milk, will cause shell rough inner surface, the light of wax-pattern cannot be replicated completely
Sliding surface.
The second layer takes grouting process after drying, to deep groove structure, refractory powder and fire resisting in be in the milk material formula
Sand material is reasonably combined, and ensure that can establish higher investment shell intensity after slurry is dry；Curing agent is used during with slurry, is made
Influence of the drying process to investment shell intensity at deep trouth can be reduced, significantly improve shell at deep trouth from strengthen firmly by obtaining slurry
Intensity.V-type batch mixer is used during the grouting slurry preparation, and suitable mixing time has been determined, it is ensured that is resistance to
Fiery flour sand material and curing agent are sufficiently mixed；Machine,massing is used during the grouting slurry preparation, it is ensured that slurry from
Each ingredient is sufficiently mixed uniformly before hard, to establish self-hardening property shell uniformly, fine and close.Deep trouth grouting process solve due to
At deep trouth formwork be not easy to parch, casting " shim " problem brought by intensity deficiency, improve product qualification rate.
Detailed description of the invention
Fig. 1 is casting sectional view of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, a kind of grouting process for making shell of deep groove structure precision castings, includes the following steps:
(1) it is proposed after being totally immersed in zirconium English slurry material after cleaning up wax-pattern, uniformly sprinkles 100- on its surface
After 200 mesh zircon sands, under 50%-60% relative humidity, first layer shell model is obtained after spontaneously drying 4-6 hours；
(2) it proposes after dry first layer shell model being immersed in zirconium English slurry material, and is uniformly sprinkled on its surface
It after 100-200 mesh zircon sand, under 50%-60% relative humidity, is dried 4-6 hours with gentle breeze, the second layer is made
Shell model；
(3) deep groove structure implements grouting process, the grouting formula of size of use: WDS ceramic powder 3-7kg, 20-80 mesh is molten
Fused silica sand 2-8kg, 30-100 mesh tekite sand 2-8kg, curing agent 20-120g, silica solution 300-1000g match above-mentioned
The grouting slurry made pours at deep groove structure rapidly, and formwork is put into the drying of surface layer drying room after pulp surface hardening,
Under 50%-60% relative humidity, drying for 24 hours, obtains deep groove structure model；
(4) it is proposed after dry deep groove structure model being immersed in mullite powder slurry, and uniformly sprinkles 30- on its surface
It after 60 mesh do not carry out sand, under 35%-45% relative humidity, is dried no less than 8 hours with high wind, third stratotype is made
Shell model；
It is proposed after dry third layer shell model is immersed in mullite powder slurry, and uniformly sprinkles 16- on its surface
It after 30 mesh do not carry out sand, under 35%-45% relative humidity, is dried no less than 8 hours with high wind, the 4th stratotype is made
Shell model, using after same treatment three times layer 7 shell model；
(6) it is proposed after dry layer 7 shell model being immersed in mullite powder slurry, in 35%-45% relative humidity
Under, it is dried no less than 24 hours with high wind, the 8th stratotype shell model is made.
In step (3), grouting slurry is formulated with the following method:
(1) weighed fire resisting flour sand material and curing agent are added to V-type batch mixer, Forced Mixing 8h or more.
(2) silica solution is accurately weighed in beaker A, then accurately weighs the made fire resisting mixing of step 1 in beaker B.
(3) under the quick stirring of glass bar, the fire resisting mixing in beaker B is added in beaker A in 4-5s, manually
10-20s is stirred, then uses machine,massing to stir 20-30s under conditions of 600-1000rpm rapidly required to get arriving
Be in the milk slurry.
The grouting process for making shell of the deep groove structure precision castings makes according to table one, by the group of wax-pattern mould shown in Fig. 1 under
Column process for making shell carries out shell processed:
As shown above, the first two layer of fine sand layer uses zirconium English slurry material and zircon sand, to ensure the shell at deep groove structure
" bridging " and suitable investment shell intensity can not established；It, cannot be complete if surface layer, which is directly in the milk, will cause shell rough inner surface
Replicate the smooth surface of wax-pattern.
The second layer takes grouting process after drying, to deep groove structure, refractory powder and fire resisting in be in the milk material formula
Sand material is reasonably combined, and ensure that can establish higher investment shell intensity after slurry is dry；Curing agent is used during with slurry, is made
Influence of the drying process to investment shell intensity at deep trouth can be reduced, significantly improve shell at deep trouth from strengthen firmly by obtaining slurry
Intensity.V-type batch mixer is used during the grouting slurry preparation, and suitable mixing time has been determined, it is ensured that is resistance to
Fiery flour sand material and curing agent are sufficiently mixed；Machine,massing is used during the grouting slurry preparation, it is ensured that slurry from
Each ingredient is sufficiently mixed uniformly before hard, to establish self-hardening property shell uniformly, fine and close.Deep trouth grouting process solve due to
At deep trouth formwork be not easy to parch, casting " shim " problem brought by intensity deficiency, improve product qualification rate.
Precision castings 50 shown in attached drawing 1 are poured using this process for making shell altogether, 48 qualified, deep trouth position is lacked without " shim "
It falls into, greatly improves product qualification rate.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (2)
1. a kind of grouting process for making shell of deep groove structure precision castings, which comprises the steps of:
(1) it is proposed after being totally immersed in zirconium English slurry material after cleaning up wax-pattern, it is uniform on its surface
Sprinkle 100-200 mesh zircon sand after, under 50%-60% relative humidity, spontaneously dry 4-6 hours after obtain first layer
Shell model；
(2) it is proposed after dry first layer shell model being immersed in zirconium English slurry material, and uniformly sprinkles 100- on its surface
It after 200 mesh zircon sands, under 50%-60% relative humidity, is dried 4-6 hours with gentle breeze, second layer shell is made
Model；
(3) deep groove structure implements grouting process, the grouting formula of size of use: WDS ceramic powder 3-7kg, 20-80 mesh tekite
Sand 2-8kg, 30-100 mesh tekite sand 2-8kg, curing agent 20-120g, silica solution 300-1000g are prepared above-mentioned
Grouting slurry pour at deep groove structure rapidly, formwork is put into surface layer drying room after pulp surface hardening dry, 50%-
Under 60% relative humidity, drying for 24 hours, obtains deep groove structure model；
(4) it is proposed after dry deep groove structure model being immersed in mullite powder slurry, and uniformly sprinkles 30-60 mesh on its surface
It after not carrying out sand, under 35%-45% relative humidity, is dried no less than 8 hours with high wind, third layer shell mould is made
Type；
(5) it is proposed after dry third layer shell model being immersed in mullite powder slurry, and uniformly sprinkles 16-30 on its surface
It after mesh does not carry out sand, under 35%-45% relative humidity, is dried no less than 8 hours with high wind, the 4th stratotype shell is made
Model, using after same treatment three times layer 7 shell model；
(6) it proposes after dry layer 7 shell model being immersed in mullite powder slurry, under 35%-45% relative humidity, uses
High wind is dried no less than 24 hours, and the 8th stratotype shell model is made.
2. the grouting process for making shell of deep groove structure precision castings according to claim 1, which is characterized in that in step (3), fill
Slurry slurry is formulated with the following method:
(1) weighed fire resisting flour sand material and curing agent are added to V-type batch mixer, Forced Mixing 8h or more；
(2) silica solution is accurately weighed in beaker A, then accurately weighs the made fire resisting mixing of step 1 in beaker B；
(3) under the quick stirring of glass bar, the fire resisting mixing in beaker B is added in beaker A in 4-5s, hand operated mixing
Then 10-20s stirs 20-30s under conditions of 600-1000rpm using machine,massing rapidly to get required grouting is arrived
Slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811408084.7A CN109317615A (en) | 2018-11-23 | 2018-11-23 | A kind of grouting process for making shell of deep groove structure precision castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811408084.7A CN109317615A (en) | 2018-11-23 | 2018-11-23 | A kind of grouting process for making shell of deep groove structure precision castings |
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| Publication Number | Publication Date |
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| CN109317615A true CN109317615A (en) | 2019-02-12 |
Family
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| CN201811408084.7A Pending CN109317615A (en) | 2018-11-23 | 2018-11-23 | A kind of grouting process for making shell of deep groove structure precision castings |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109894575A (en) * | 2019-03-27 | 2019-06-18 | 上海良基博方汽车发动机零部件制造股份有限公司 | A kind of investment casting cores production technology of Worm gear pressurizing unit scroll and pumps component |
| CN110947916A (en) * | 2019-12-24 | 2020-04-03 | 安徽应流航源动力科技有限公司 | Large thin-wall precision casting casing part shell manufacturing process method |
| CN110961579A (en) * | 2019-12-27 | 2020-04-07 | 安徽应流航源动力科技有限公司 | Shell manufacturing process for large directional blade formwork |
| CN111168007A (en) * | 2020-01-20 | 2020-05-19 | 江苏中超航宇精铸科技有限公司 | Method for manufacturing formwork with cavity structure |
| CN111804873A (en) * | 2020-07-24 | 2020-10-23 | 石家庄盛华企业集团有限公司 | Shell seal dripping slurry and process thereof |
| CN115383049A (en) * | 2022-09-16 | 2022-11-25 | 湖州南丰机械制造有限公司 | Shell manufacturing method for thin-wall narrow-runner precision casting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109894575A (en) * | 2019-03-27 | 2019-06-18 | 上海良基博方汽车发动机零部件制造股份有限公司 | A kind of investment casting cores production technology of Worm gear pressurizing unit scroll and pumps component |
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| CN111804873A (en) * | 2020-07-24 | 2020-10-23 | 石家庄盛华企业集团有限公司 | Shell seal dripping slurry and process thereof |
| CN111804873B (en) * | 2020-07-24 | 2022-03-08 | 石家庄盛华企业集团有限公司 | Shell seal dripping slurry and process thereof |
| CN115383049A (en) * | 2022-09-16 | 2022-11-25 | 湖州南丰机械制造有限公司 | Shell manufacturing method for thin-wall narrow-runner precision casting |
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Application publication date: 20190212 |
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