CN108145095A - A kind of process for making shell of complexity deep groove structure precision castings - Google Patents
A kind of process for making shell of complexity deep groove structure precision castings Download PDFInfo
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- CN108145095A CN108145095A CN201711447641.1A CN201711447641A CN108145095A CN 108145095 A CN108145095 A CN 108145095A CN 201711447641 A CN201711447641 A CN 201711447641A CN 108145095 A CN108145095 A CN 108145095A
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- China
- Prior art keywords
- shell
- slurry
- malaysia
- shell model
- sand
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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
- B22C9/22—Moulds for peculiarly-shaped castings
-
- 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
-
- 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
Abstract
The invention discloses a kind of process for making shell of complicated deep groove structure precision castings, are related to precision casting technology field.The technique improves the capacity of heat transmission of formwork by the fire resisting flour sand material of 2 layers of formwork before reasonable selection, reduces casting and loose, hot tearing risk is generated at deep trouth；By having poured into dry sand at deep trouth position and blocked notch with slurry, solve due at deep trouth formwork be not easy to parch, casting " shim " caused by intensity deficiency, while also reduce the heat storage capacity of formwork at deep trouth.
Description
Technical field
The present invention relates to precision casting technology field, specially a kind of process for making shell of complicated deep groove structure precision castings.
Background technology
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 done
Permeability and intensity easily generate casting " shim " and " runout " defect；Furthermore since formwork recovery electric heating system is higher at deep trouth, in casting
Formwork easily causes that casting is loose, thermal fragmentation defect as " isolated thermal center " at this in cooling procedure.According to traditional process for making shell,
The qualification rate of precision castings is less than 10%.
Invention content
(1) the technical issues of solving
In view of the deficiencies of the prior art, it the present invention provides a kind of process for making shell of complicated deep groove structure precision castings, solves
The defects of casting " shim " and " runout " problem.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs：A kind of complexity deep groove structure precision castings
Process for making shell, include the following steps：
Step 1, wax-pattern compacting is carried out, and gained wax-pattern is cleaned up；
Step 2, schmigel slurry, Malaysia slurry material is respectively configured, the wax-pattern cleaned up is taken to carry out multiple bonding layer successively
Hang and apply, it is each hang apply after stucco and fully dry, preliminary shell model is made；
Step 3, the preliminary shell model deep trouth position of gained dry sand has been poured into, and block notch with slurry；
Step 4, step 3 gained shell is carried out to middle level successively again and hangs painting and backing layer extension painting, and after every is hung and applied
Stucco, drying respectively, obtain whole shell model；
Step 5, dewaxing treatment；
Step 6, high-temperature roasting is up to required deep groove structure precision castings shell.
Dry sand selection 30-60 mesh Malaysia sand described in step 3, the slurry is corundum slurry.
According to a kind of described process for making shell of complicated deep groove structure precision castings, according to following steps carry out coating hang apply and
Stucco：
(1) it is proposed after schmigel slurry is totally immersed in after wax-pattern made from step 1 is cleaned up, it is uniform on its surface
Sprinkle 60-100 mesh emergies after, under 50%-60% relative humidity, spontaneously dry 4-6 hours after obtain first layer shell
Model；
(2) it is proposed, and uniformly sprinkled on its surface after dry first layer shell model being immersed in schmigel slurry
After 60-100 mesh emergies, under 50%-60% relative humidity, processing 5-7 hours is dried with gentle breeze, the second stratotype is made
Shell model；
(3) it is proposed, and uniformly sprinkled on its surface after dry second layer shell model being immersed in Malaysia slurry material
After the sand of 30-60 mesh Malaysia, under 50%-60% relative humidity, processing 10-20 hours is dried with gentle breeze, third layer is made
Shell model；
(4) it is proposed, and uniformly sprinkled on its surface after dry third layer shell model being immersed in Malaysia slurry material
After the sand of 30-60 mesh Malaysia, under 35%-45% relative humidity, processing 10-20 hours is dried with high wind, is made the 4th layer
Shell model；
(5) the 4th stratotype shell model deep trouth position of gained 30-60 mesh Malaysia sand has been poured into, and with corundum slurry sealing
Block notch；
(6) shell model obtained by step (5) proposes, and uniformly sprinkle 16- on its surface after being immersed in Malaysia slurry material
After 30 Malaysia sand, under 35%-45% relative humidity, processing 10-20 hours is dried with high wind, layer 5 shell mould is made
Type, using after same treatment three times the 8th stratotype shell model；
(7) it is proposed after the 8th dry stratotype shell model being immersed in Malaysia slurry material, in 35%-45% relative humidity
Under, processing 48-60 hours is dried with high wind, required shell model is made.
(3) advantageous effect
The present invention provides a kind of process for making shell of complicated deep groove structure precision castings, and the technique is by 2 layers before reasonable selection
The fire resisting flour sand material of formwork improves the capacity of heat transmission of formwork, reduces casting and loose, hot tearing risk is generated at deep trouth；It is logical
Cross and dry sand poured at deep trouth position and has blocked notch with slurry, solve due at deep trouth formwork be not easy to parch, intensity not
Casting caused by foot " shim ", while also reduce the heat storage capacity of formwork at deep trouth.
Description of the drawings
Fig. 1 is casting sectional view of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the present invention provides a kind of technical solution：A kind of process for making shell of complexity deep groove structure precision castings, packet
Include following steps：
Step 1, wax-pattern (1) is carried out to suppress, and gained wax-pattern (1) is cleaned up；
Step 2, schmigel slurry, Malaysia slurry material is respectively configured, the wax-pattern (1) cleaned up is taken to carry out successively repeatedly just
Layer, which is hung, to be applied, it is each hang apply after stucco and fully dry, preliminary shell model (2) is made；
Step 3, preliminary shell model (2) deep trouth (3) position of gained dry sand (4) has been poured into, and sealed with slurry (5)
Block notch；
Step 4, step 3 gained shell is carried out to middle level successively again and hangs painting and backing layer extension painting, and after every is hung and applied
Stucco, drying respectively, obtain whole shell model；
Step 5, dewaxing treatment；
Step 6, high-temperature roasting is up to required deep groove structure precision castings shell.
Dry sand (4) selection 30-60 mesh Malaysia sand described in step 3, the slurry (5) is corundum slurry.
According to a kind of described process for making shell of complicated deep groove structure precision castings, according to following steps carry out coating hang apply and
Stucco；
(1) it is proposed after schmigel slurry is totally immersed in after wax-pattern made from step 1 is cleaned up, it is uniform on its surface
Sprinkle 60-100 mesh emergies after, under 50%-60% relative humidity, spontaneously dry 4-6 hours after obtain first layer shell
Model；
(2) it is proposed, and uniformly sprinkled on its surface after dry first layer shell model being immersed in schmigel slurry
After 60-100 mesh emergies, under 50%-60% relative humidity, processing 5-7 hours is dried with gentle breeze, the second stratotype is made
Shell model；
(3) it is proposed, and uniformly sprinkled on its surface after dry second layer shell model being immersed in Malaysia slurry material
After the sand of 30-60 mesh Malaysia, under 50%-60% relative humidity, processing 10-20 hours is dried with gentle breeze, third layer is made
Shell model；
(4) it is proposed, and uniformly sprinkled on its surface after dry third layer shell model being immersed in Malaysia slurry material
After the sand of 30-60 mesh Malaysia, under 35%-45% relative humidity, processing 10-20 hours is dried with high wind, is made the 4th layer
Shell model；
(5) the 4th stratotype shell model deep trouth position of gained 30-60 mesh Malaysia sand has been poured into, and with corundum slurry sealing
Block notch；
(6) shell model obtained by step (5) proposes, and uniformly sprinkle 16- on its surface after being immersed in Malaysia slurry material
After 30 Malaysia sand, under 35%-45% relative humidity, processing 10-20 hours is dried with high wind, layer 5 shell mould is made
Type, using after same treatment three times the 8th stratotype shell model；
(7) it is proposed after the 8th dry stratotype shell model being immersed in Malaysia slurry material, in 35%-45% relative humidity
Under, processing 48-60 hours is dried with high wind, required shell model is made.
Precision castings 16 shown in attached drawing 1 are poured into a mould using this process for making shell altogether, 12 qualified, no deep trouth position " shim " is dredged
It is scrapped caused by pine, hot tearing, greatly improves product qualification rate.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any this practical relationship or sequence.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed or further include as this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (3)
1. a kind of process for making shell of complexity deep groove structure precision castings, it is characterised in that：Include the following steps：
Step 1, wax-pattern compacting is carried out, and gained wax-pattern is cleaned up；
Step 2, schmigel slurry, Malaysia slurry material is respectively configured, the wax-pattern cleaned up is taken to carry out multiple bonding layer successively and hangs painting,
It is each hang apply after stucco and fully dry, preliminary shell model is made；
Step 3, the preliminary shell model deep trouth position of gained dry sand has been poured into, and block notch with slurry；
Step 4, step 3 gained shell is carried out to middle level successively again and hangs painting and backing layer extension painting, and distinguish after hanging and apply at every
Stucco, drying obtain whole shell model；
Step 5, dewaxing treatment；
Step 6, high-temperature roasting is up to required deep groove structure precision castings shell.
2. a kind of process for making shell of complicated deep groove structure precision castings according to claim 1, it is characterised in that：Step 3 institute
The dry sand selection 30-60 mesh Malaysia sand stated, the slurry is corundum slurry.
3. a kind of process for making shell of complicated deep groove structure precision castings according to claim 1, it is characterised in that：According to following
Step carries out coating and hangs painting and stucco：
(1) it proposes after schmigel slurry is totally immersed in after wax-pattern made from step 1 is cleaned up, is uniformly spread on its surface
After upper 60-100 mesh emergy, under 50%-60% relative humidity, first layer shell model is obtained after spontaneously drying 4-6 hours；
(2) it is proposed, and 60- is uniformly sprinkled on its surface after dry first layer shell model being immersed in schmigel slurry
After 100 mesh emergies, under 50%-60% relative humidity, processing 5-7 hours is dried with gentle breeze, second layer shell is made
Model；
(3) it is proposed, and 30-60 is uniformly sprinkled on its surface after dry second layer shell model being immersed in Malaysia slurry material
After the sand of mesh Malaysia, under 50%-60% relative humidity, processing 10-20 hours is dried with gentle breeze, third layer shell mould is made
Type；
(4) it is proposed, and 30-60 is uniformly sprinkled on its surface after dry third layer shell model being immersed in Malaysia slurry material
After the sand of mesh Malaysia, under 35%-45% relative humidity, processing 10-20 hours is dried with high wind, the 4th stratotype shell mold is made
Type；
(5) the 4th stratotype shell model deep trouth position of gained 30-60 mesh Malaysia sand has been poured into, and blocked with corundum slurry
Notch；
(6) shell model obtained by step (5) proposes, and uniformly sprinkle 16-30 horses on its surface after being immersed in Malaysia slurry material
After carrying out sand, under 35%-45% relative humidity, processing 10-20 hours is dried with high wind, layer 5 shell model is made,
Using after same treatment three times the 8th stratotype shell model；
(7) it proposes after the 8th dry stratotype shell model being immersed in Malaysia slurry material, under 35%-45% relative humidity, uses
Processing 48-60 hours is dried in high wind, and required shell model is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711447641.1A CN108145095A (en) | 2017-12-27 | 2017-12-27 | A kind of process for making shell of complexity deep groove structure precision castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711447641.1A CN108145095A (en) | 2017-12-27 | 2017-12-27 | A kind of process for making shell of complexity deep groove structure precision castings |
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| CN108145095A true CN108145095A (en) | 2018-06-12 |
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| CN201711447641.1A Pending CN108145095A (en) | 2017-12-27 | 2017-12-27 | A kind of process for making shell of complexity deep groove structure precision castings |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109317615A (en) * | 2018-11-23 | 2019-02-12 | 安徽应流航源动力科技有限公司 | A kind of grouting process for making shell of deep groove structure precision castings |
| CN110508750A (en) * | 2019-09-30 | 2019-11-29 | 西安皓森精铸有限公司 | A kind of interior casting method with partition workpiece of elongated hole |
| 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 |
| CN111001759A (en) * | 2019-11-11 | 2020-04-14 | 湖州南丰机械制造有限公司 | Shell making method for improving sand removing efficiency of casting |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0716700A (en) * | 1993-06-30 | 1995-01-20 | Daido Steel Co Ltd | Wax pattern used to manufacture of mold and method for coating refractory sand |
| JP2000140993A (en) * | 1998-11-13 | 2000-05-23 | Nec Corp | Manufacture of mold |
| CN1827256A (en) * | 2006-04-14 | 2006-09-06 | 清华大学 | Method for direct production of core in narrow groove and blind hole of wax mould |
| CN102935488A (en) * | 2012-11-19 | 2013-02-20 | 重庆精芯通铸造材料有限公司 | Shell filler assisting shell manufacture in investment casting and method filling shells by adopting filler |
| CN103350195A (en) * | 2013-06-20 | 2013-10-16 | 东营嘉扬精密金属有限公司 | Production method for long hole and narrow groove products by investment casting by utilizing poly carbon-type core materials |
| CN107486542A (en) * | 2017-08-07 | 2017-12-19 | 安徽霍山科皖特种铸造有限责任公司 | A kind of new essence casting process for making shell |
-
2017
- 2017-12-27 CN CN201711447641.1A patent/CN108145095A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0716700A (en) * | 1993-06-30 | 1995-01-20 | Daido Steel Co Ltd | Wax pattern used to manufacture of mold and method for coating refractory sand |
| JP2000140993A (en) * | 1998-11-13 | 2000-05-23 | Nec Corp | Manufacture of mold |
| CN1827256A (en) * | 2006-04-14 | 2006-09-06 | 清华大学 | Method for direct production of core in narrow groove and blind hole of wax mould |
| CN102935488A (en) * | 2012-11-19 | 2013-02-20 | 重庆精芯通铸造材料有限公司 | Shell filler assisting shell manufacture in investment casting and method filling shells by adopting filler |
| CN103350195A (en) * | 2013-06-20 | 2013-10-16 | 东营嘉扬精密金属有限公司 | Production method for long hole and narrow groove products by investment casting by utilizing poly carbon-type core materials |
| CN107486542A (en) * | 2017-08-07 | 2017-12-19 | 安徽霍山科皖特种铸造有限责任公司 | A kind of new essence casting process for making shell |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109317615A (en) * | 2018-11-23 | 2019-02-12 | 安徽应流航源动力科技有限公司 | A kind of grouting process for making shell of deep groove structure precision castings |
| CN110508750A (en) * | 2019-09-30 | 2019-11-29 | 西安皓森精铸有限公司 | A kind of interior casting method with partition workpiece of elongated hole |
| CN111001759A (en) * | 2019-11-11 | 2020-04-14 | 湖州南丰机械制造有限公司 | Shell making method for improving sand removing efficiency of casting |
| 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 |
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Application publication date: 20180612 |
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