CN106607559B - The sand mold formative method of turbine blade - Google Patents
The sand mold formative method of turbine blade Download PDFInfo
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- CN106607559B CN106607559B CN201510692156.5A CN201510692156A CN106607559B CN 106607559 B CN106607559 B CN 106607559B CN 201510692156 A CN201510692156 A CN 201510692156A CN 106607559 B CN106607559 B CN 106607559B
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Abstract
A kind of sand mold formative method of turbine blade, includes the following steps：Modelling；Utilize model moulding；Mould assembling and vertical case.The sand mold formative method of above-mentioned turbine blade can reduce sand using amount and production cost and shorten the moulding production cycle.
Description
Technical field
The present invention relates to casting technology field, more particularly to the sand mold formative method of a kind of turbine blade.
Background technology
As the hydraulic turbine develops to high efficiency, enlarged direction, China develops and builds in succession some large and medium-sized water power
It stands.Global Foundry Market economic situation is bad, dog-eat-dog, under the increasingly compressed environment of casting profit margin, customer
It is shorter and shorter to desired delivery cycle.This requires Foundry Works while reducing production cost, promotes casting quality, reduces
The reworked processing time caused by size, quality problems shortens the castings production period.
Blade of large-sized water turbine molded line is complicated, difference of height is big, the method for sand casting generally use cored-up mould, with blade
Two core boxes are made subject to positive and negative pressure surface.Production procedure is that " coremaking --- organizes core --- vertical core --- moulding ", concretely：
The sand core in positive and negative face is made first, then two sand cores are grouped together, while being carried out conjunction using elongated bolt, then is stood
Core finally places sandbox and is laid with running gate system, cocurrent sand molding.The method for overall size be more than 1500 × 1500 ×
800mm, casting weight are more than that the moulding of the turbine blade of 5t has following deficiency：First, the positive and negative pressure surface system of blade is directed to
Make core box, since core box size and constructive difficulty are big, manufacturing cost is higher；Secondly, core assembly process sand using amount is big, and casting presses case
Temperature fall time is long；Again, group core process is complicated, and precision is difficult to control, and is also easy to produce fash after cast between sand core, casting dimension is inclined
It is poor big.In addition, the formative method production procedure of the above-mentioned prior art is complicated, the production cycle is long.
Invention content
In view of this, it is necessary to provide a kind of reduction sand using amount and production costs and the hydraulic turbine for shortening the moulding production cycle
The sand mold formative method of blade.
A kind of sand mold formative method of turbine blade, includes the following steps：
Modelling：Blade physical model corresponding with turbine blade is made, to utilize blade entity in moulding
Model forms the contoured surface of Blade roughcast；According to the contour line of turbine blade, frame tire plate is made, to utilize frame tire plate branch
Support and locating blades physical model；According to the shape of frame tire plate, profile-followed core print is made in frame tire plate surrounding, with using with the shape
Core print forms the core print of sand mold；According to the shape of profile-followed core print, same shape is made, the gap plate that thickness is 1 ~ 1.5mm, and
Gap plate is corresponding with profile-followed core print side and the shape of upper surface, and one is formed to be given between mutually matched sand mold by gap plate
Fixed gap, and then ensure the smooth of mould assembling；
Utilize model moulding：Frame tire plate and profile-followed core print are placed on build platform, it is real in frame tire plate and blade
Positioning pin is installed in the region that body Model is contacted, with the blade physical model placed by positioning finger setting；Place the first sandbox
Afterwards, it is laid with running gate system and carries out the quicksand moulding of the first sandbox；After the hardening of the first sand mold of the first sandbox, the first sand is overturn
Case so that frame tire plate, profile-followed core print, blade physical model, sand mold exposed face be located above build platform, remove frame tire
Plate and profile-followed core print, and gap plate is set on gap corresponding with profile-followed core print on the first sand mold；On the first sand mold with
After arbor is set in the corresponding gap of frame tire plate and brushes insulating powder on the exposed face of the first sand mold, then in the first sand mold
Upper progress quicksand moulding, to obtain the second sand mold；After the hardening of the second sand mold, the gap on the second sand mold and the first sand mold is taken away
Plate and blade physical model shape.
Mould assembling and vertical case：Swabbing is carried out to the first sand mold and the second sand mold, to prevent scab, after qualification
Mould assembling operates and vertical case.
By using the formative method of the present invention, following effect is reached：
Make 1. only need to make real sample leaf model using the suction surface of blade as die joint before blade shape construction production and play support
The usage amount of frame-type tire plate, timber is reduced, while Mold Making difficulty significantly reduces.Mold Making expense and making core
The scheme of box compares and reduces 25% or so.
2. there are many reduction when sandbox volume is compared with cored-up mould when blade shape construction produces, while being spread together when running gate system moulding
If being not required to additionally increase sandbox, sand using amount is reduced obviously, while can also add sand lump etc. when moulding, can be further reduced
Sand using amount；Sand using amount when Blade roughcast sand using amount is compared with using conventional method moulding declines 45%；Meanwhile effectively shortening casting
The case time is pressed, the castings production period is shortened.In actual production, the pressure case period averagely reduces 6 days.
3. the effectively size quality of control Blade roughcast, calculates through scene, existing dimension overproof class problem is more conventional to make
Type method reduces 28% or so, and process cycle has dropped 20% or so.
Specific implementation mode
The present invention provides a kind of sand mold formative method of turbine blade, by making leaf corresponding with turbine blade
Then blade physical model is placed on progress drift sand moulding in sandbox, finally takes out blade physical model by piece physical model
Afterwards, sand mold cavity of the gap that blade physical model leaves in sand mold as casting turbine blade.The turbine blade
Sand mold formative method, includes the following steps：
Step S300, modelling：Blade physical model corresponding with turbine blade is made, to be utilized in moulding
Blade physical model forms the contoured surface of Blade roughcast；According to the contour line of turbine blade, frame tire plate is made, to utilize frame
Frame tire plate supports and locating blades physical model；According to the shape of frame tire plate, profile-followed core print is made in frame tire plate surrounding, with
The core print of sand mold is formed using profile-followed core print, wherein to ensure that profile-followed core print is smooth, and reduce cambered surface, while to have enough
Gradient ensures the smooth of type of having unpacked；According to the shape of profile-followed core print, same shape is made, the gap that thickness is 1 ~ 1.5mm
Plate, and gap plate is corresponding with profile-followed core print side and the shape of upper surface, with by gap plate give mutually matched sand mold it
Between form certain gap, and then ensure the smooth of mould assembling.
Step S301 utilizes model moulding：Frame tire plate and profile-followed core print are placed on build platform, in frame tire plate
The region installation positioning pin contacted with blade physical model, with the blade physical model placed by positioning finger setting；It places
After first sandbox, it is laid with running gate system and carries out the quicksand moulding of the first sandbox；After the hardening of the first sand mold of the first sandbox, turn over
Turn the first sandbox so that frame tire plate, profile-followed core print, blade physical model, sand mold exposed face be located at build platform top, go
Fall frame tire plate and profile-followed core print, and gap plate is set on gap corresponding with profile-followed core print on the first sand mold；First
After arbor is set on sand mold in gap corresponding with frame tire plate and brushes insulating powder on the exposed face of the first sand mold, then
Quicksand moulding is carried out on first sand mold, to obtain the second sand mold；After the hardening of the second sand mold, the second sand mold and the first sand mold are taken away
On gap plate and blade physical model shape.
Step S302, mould assembling and vertical case：Swabbing is carried out to the first sand mold and the second sand mold, prevents scab,
Mould assembling operation and vertical case after qualification.Step S302 is specially：The swabbing on the first sand mold, the second sand mold；By the second sand mold
After being placed on the first sand mold, the resin sand that a layer thickness is 40 ~ 60mm is flowed at the back side of the second sand mold, ensures the second sand mold
The back side is concordant with sandbox upper surface, while can be in close contact with bottom plate, then, bottom plate is placed on the resin sand after being scraped,
Bottom plate must cover the back side of the second sand mold, and the length and width degree guarantee of bottom plate is close or equal with the outer profile length and width degree of sandbox,
It reuses U-typed card to connect bottom plate and sandbox, finally founds case.In the present invention, the first sandbox being previously mentioned, according to reality
Needs in the production on border, the first sandbox can be nowel or top box.
By using the formative method of the present invention, following effect is reached：
Make 1. only need to make real sample leaf model using the suction surface of blade as die joint before blade shape construction production and play support
The usage amount of frame-type tire plate, timber is reduced, while Mold Making difficulty significantly reduces.Mold Making expense and making core
The scheme of box compares and reduces 25% or so.
2. there are many reduction when sandbox volume is compared with cored-up mould when blade shape construction produces, while being spread together when running gate system moulding
If being not required to additionally increase sandbox, sand using amount is reduced obviously, while can also add sand lump etc. when moulding, can be further reduced
Sand using amount；Sand using amount when Blade roughcast sand using amount is compared with using conventional method moulding declines 45%；Meanwhile effectively shortening casting
The case time is pressed, the castings production period is shortened.In actual production, the pressure case period averagely reduces 6 days.
3. the effectively size quality of control Blade roughcast, calculates through scene, existing dimension overproof class problem is more conventional to make
Type method reduces 28% or so, and process cycle has dropped 20% or so.
Claims (1)
1. a kind of sand mold formative method of turbine blade, includes the following steps：
Modelling：Blade physical model corresponding with turbine blade is made, to utilize blade physical model in moulding
Form the contoured surface of Blade roughcast；According to the contour line of turbine blade, make frame tire plate, with using the support of frame tire plate and
Locating blades physical model；According to the shape of frame tire plate, profile-followed core print is made in frame tire plate surrounding, to utilize profile-followed core print
Form the core print of sand mold；According to the shape of profile-followed core print, same shape is made, the gap plate that thickness is 1 ~ 1.5mm, and gap plate
It is corresponding with profile-followed core print side and the shape of upper surface, to be formed centainly between mutually matched sand mold by gap plate
Gap, and then ensure the smooth of mould assembling；
Utilize model moulding：Frame tire plate and profile-followed core print are placed on build platform, in frame tire plate and blade entity mould
Positioning pin is installed in the region that type is contacted, with the blade physical model placed by positioning finger setting；After placing the first sandbox, paving
If running gate system and the quicksand moulding for carrying out the first sandbox；After the first sandbox the first sand mold hardening after, overturning the first sandbox with
So that the exposed face of frame tire plate, profile-followed core print, blade physical model, sand mold is located above build platform, remove frame tire plate and
Profile-followed core print, and gap plate is set on gap corresponding with profile-followed core print on the first sand mold；On the first sand mold with frame
After arbor is set in the corresponding gap of tire plate and brushes insulating powder on the exposed face of the first sand mold, then it is enterprising in the first sand mold
Row quicksand moulding, to obtain the second sand mold；After the hardening of the second sand mold, take away gap plate on the second sand mold and the first sand mold and
Blade physical model shape；
Mould assembling and vertical case：Swabbing, to prevent scab, the mould assembling after qualification are carried out to the first sand mold and the second sand mold
Operation and vertical case；
Wherein, " swabbing is carried out to the first sand mold and the second sand mold, to prevent scab, the mould assembling operation after qualification
And vertical case " be specially：The swabbing on the first sand mold, the second sand mold；After second sand mold is placed on the first sand mold, second
The resin sand that a layer thickness is 40 ~ 60mm is flowed at the back side of sand mold, ensures that the back side of the second sand mold is concordant with sandbox upper surface, simultaneously
It can be in close contact with bottom plate, then, bottom plate be placed on the resin sand after being scraped, bottom plate must cover the back of the body of the second sand mold
The length and width degree guarantee in face, bottom plate is close or equal with the outer profile length and width degree of sandbox, reuses U-typed card by bottom plate and sandbox
It connects, finally founds case；First sandbox is nowel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510692156.5A CN106607559B (en) | 2015-10-23 | 2015-10-23 | The sand mold formative method of turbine blade |
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| CN201510692156.5A CN106607559B (en) | 2015-10-23 | 2015-10-23 | The sand mold formative method of turbine blade |
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| CN106607559B true CN106607559B (en) | 2018-09-18 |
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| CN107598100A (en) * | 2017-09-11 | 2018-01-19 | 芜湖市云峰铸造有限责任公司 | A kind of Automobile flywheel casting technique and its device |
| CN113500165A (en) * | 2021-07-13 | 2021-10-15 | 烟台恒邦合金材料有限公司 | Method for producing impeller blade mould by using gypsum matrix |
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| US4791975A (en) * | 1987-03-19 | 1988-12-20 | Cmi International, Inc. | Process of flaskless sand casting |
| CN101015851A (en) * | 2007-03-12 | 2007-08-15 | 哈尔滨电机厂有限责任公司 | Technique for casting turbine blade |
| CN101386056A (en) * | 2008-10-07 | 2009-03-18 | 大连船用推进器有限公司 | Tire retreading casting molding method |
| CN101716652A (en) * | 2009-11-27 | 2010-06-02 | 宁夏共享集团有限责任公司 | Method for casting frame castings of mining machinery |
| CN103600029A (en) * | 2013-11-18 | 2014-02-26 | 宁夏共享集团有限责任公司 | Modeling method of conical casting |
| CN104493085A (en) * | 2014-12-02 | 2015-04-08 | 北京航星机器制造有限公司 | Manufacturing method of compound sand casting die |
| CN104722708A (en) * | 2015-03-30 | 2015-06-24 | 共享铸钢有限公司 | Modeling method and sand mold structure of sector-shaped end cover type casting for large-size mill |
| CN104942236A (en) * | 2015-05-14 | 2015-09-30 | 辽宁福鞍重工股份有限公司 | Molding method for vertical pouring production of blade without sand box |
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2015
- 2015-10-23 CN CN201510692156.5A patent/CN106607559B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3830279A (en) * | 1969-05-28 | 1974-08-20 | Alusuisse | Method and apparatus for forming sand molds |
| US4791975A (en) * | 1987-03-19 | 1988-12-20 | Cmi International, Inc. | Process of flaskless sand casting |
| CN101015851A (en) * | 2007-03-12 | 2007-08-15 | 哈尔滨电机厂有限责任公司 | Technique for casting turbine blade |
| CN101386056A (en) * | 2008-10-07 | 2009-03-18 | 大连船用推进器有限公司 | Tire retreading casting molding method |
| CN101716652A (en) * | 2009-11-27 | 2010-06-02 | 宁夏共享集团有限责任公司 | Method for casting frame castings of mining machinery |
| CN103600029A (en) * | 2013-11-18 | 2014-02-26 | 宁夏共享集团有限责任公司 | Modeling method of conical casting |
| CN104493085A (en) * | 2014-12-02 | 2015-04-08 | 北京航星机器制造有限公司 | Manufacturing method of compound sand casting die |
| CN104722708A (en) * | 2015-03-30 | 2015-06-24 | 共享铸钢有限公司 | Modeling method and sand mold structure of sector-shaped end cover type casting for large-size mill |
| CN104942236A (en) * | 2015-05-14 | 2015-09-30 | 辽宁福鞍重工股份有限公司 | Molding method for vertical pouring production of blade without sand box |
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