CN107931525A - A kind of method for controlling model casting casting solidification - Google Patents
A kind of method for controlling model casting casting solidification Download PDFInfo
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- CN107931525A CN107931525A CN201711167851.5A CN201711167851A CN107931525A CN 107931525 A CN107931525 A CN 107931525A CN 201711167851 A CN201711167851 A CN 201711167851A CN 107931525 A CN107931525 A CN 107931525A
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- casting
- formwork
- solidification
- module
- controlling model
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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
- B22C9/04—Use of lost patterns
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
A kind of method for controlling model casting casting solidification disclosed by the invention, including step：The definite parameter that immersion cooling is carried out to the formwork after casting；Make wax-pattern and be combined into module；Coat shell processed in module, when shell number progress processed completes 50% 70%, module outer surface is reinforced, then proceedes to paint case making process；After the completion of shell processed the formwork completed is formed by dewaxing, roasting；Casting, has cast and has carried out immersion cooling treatment according to the position for needing to cool down to formwork into water cooling requirement.A kind of method for being used to control model casting casting solidification of the present invention is by carrying out formwork appropriate consolidation process, ensure that formwork does not crack in Cooling Process, the cooling technique of formwork and position after being poured into a mould using casting technique simulation analysis technical perfection, achieve the purpose that to control the solidification of investment casting process medium casting, accelerate the local solidification cooling of casting, avoid casting and the defects of shrinkage cavity, loose occur, and further improve casting yield rate and yield rate.
Description
Technical field
The invention belongs to precision casting technology field, and in particular to a kind of side for being used to control model casting casting solidification
Method.
Background technology
Using the precision casting of model casting, general structure is complicated, and thermal center is more, and traditional casting method is mended using running channel
Contracting sets riser feeding, causes yield rate low, inefficiency；Feeding a casting is is realized in the part having at the same time, using local guarantor
The mode of temperature delays the setting time of Feeding channel, to obtain without the loose casting of shrinkage cavity, but this mode operating difficulties, effect
Difference, simultaneously because setting time extends, is more easy to the defects of shrinkage cavity, loose occur；Particularly part casting is special due to structure
Property, after technological design, also there are larger isolated thermal center, feeding is difficult for bottom, to cause defect to produce.
Carry out domestic and international technology to the process for controlling model casting casting solidification to look into newly, it is entitled《One kind accelerates
The full form casting process of casting solidification cooling》Chinese patent (application number 201510690405.7, applying date 2015.10.22,
105364002 publication date 2016.03.02 of publication number) a kind of full form casting process for accelerating casting solidification cooling is provided, it is walked
Rapid is comprising following operation, makes wax-pattern by normal process, wax-pattern is combined into module；Coat system in wax-pattern by normal process
Shell, when shell processed completes 60%, by batten insertion formwork inner cavity, and prepares the chill bar identical with batten quantity and presses normal process
Shell processed, dewaxing, roasting form the formwork completed；The formwork of batten exposed position is knocked off with hand hammer；Ready chill bar is inserted
Enter the formwork cavity formed after batten is burnt out, casting and post-treatment operations are completed by normal process.By being made in formwork
The batten for being inserted into batten in formwork inner cavity in journey and replacing burning out with iron bar after formwork roasting is inserted into formwork cavity, is casting
Afterwards using the quick discharge line of thermal conductive resin of iron bar or the heat of interior intracavitary, accelerate the solidification cooling of casting, avoid
There is the defects of shrinkage cavity, loose in casting.It is entitled《A kind of precision-investment casting method for changing casting solidification radiating condition》
Chinese patent (application number 201310473092.0, applying date 2013.10.11, publication number 103495702, publication date
2014.01.08 a kind of precision-investment casting method for changing casting solidification radiating condition) is proposed, it is therefore an objective to by varying type
The shell part number of plies, after coating and the hanging sand of certain number of plies are painted with meltability model, is pasted needing thinned position
Wax material, makes the position without coating and hanging sand, and it is fewer than other position numbers of plies to obtain the number of plies of formwork part with this, by making
During standby entirety shell, the corresponding monolithic devices shell parts in shrinkage porosite position are thinned, so that relatively thin after pouring metal melt
Position rapid heat dissipation, molten metal the position quickly solidification without producing shrinkage porosite, solve locally radiate after casting forming it is bad and
The shrinkage porosite metallurgical imperfection problem of generation.
The content of the invention
It is an object of the invention to provide a kind of method for controlling model casting casting solidification, simplify and operated
Journey, and solve that baroque casting during model casting castings production is local usually easily to produce contracting because radiating bad
The castability problem such as pine, shrinkage cavity.
The technical solution adopted in the present invention is：A kind of method for controlling model casting casting solidification, including it is following
Step：
Step 1, confirms the casting parameter of model casting, and determines to carry out the formwork after casting the parameter of immersion cooling；
Step 2, requires to make wax-pattern according to casting, wax-pattern is combined into module；
Step 3, coats shell processed in the module, when shell number progress processed completes 50%-70%, to the module
Outer surface is reinforced, and then proceedes to paint case making process；
Step 4, forms the formwork completed after the completion of shell processed by dewaxing, roasting；
Step 5, the formwork is cast according to technological requirement, has been cast and has been required according into water cooling to the mould
The position that shell needs to cool down carries out immersion cooling treatment, that is, completes the solidification of casting.
The features of the present invention also resides in,
The concrete mode reinforced in the step 3 to the module outer surface is：Using wire to the module
Outer surface is in mesh reinforcement.
Between adjacent two wires at intervals of 10-50mm.
Simulation analysis are carried out using ProCAST softwares obtain the parameter soaked and cooled down in the step 1.
The immersion cooling parameter includes immersed depth and soaking time.
The formwork cast is subjected to immersion cooling treatment in bosh in the step 5.
The present invention is a kind of to be used to control the method for model casting casting solidification by carrying out appropriate consolidation process to formwork,
Ensure that formwork does not crack in Cooling Process, the cooling technique of formwork and portion after being poured into a mould using casting technique simulation analysis technical perfection
Position, achievees the purpose that to control the solidification of investment casting process medium casting, accelerates the local solidification cooling of casting, avoid casting
There is the defects of shrinkage cavity, loose in part, and further improves casting yield rate and yield rate.
Brief description of the drawings
Fig. 1 is the II type retaining ring casting structure schematic diagrames of the embodiment of the present invention 1；
Fig. 2 is the sectional view of Fig. 1；
Fig. 3 is the founding method stereogram of the II type retaining ring casting of the embodiment of the present invention 1；
Fig. 4 is the side view of Fig. 3；
The structure diagram of the shell casting of Fig. 5 embodiment of the present invention 2；
Fig. 6 is the founding method stereogram of the shell casting of the embodiment of the present invention 2.
In figure, 1. casting, 2. sprues, 3. cross gates, 4. riser, 5. ingates.
Embodiment
A kind of method for controlling model casting casting solidification provided by the invention, comprises the following steps：
Step 1, confirms the casting parameter of model casting, and determines to carry out the formwork after casting the parameter of immersion cooling；
Example, the parameter of simulation analysis acquisition immersion cooling is carried out using ProCAST softwares.And cooling parameter of soaking then includes leaching
Water depth and soaking time.
Step 2, requires to make wax-pattern according to casting, wax-pattern is combined into module；
Step 3, coats shell processed in module, when shell number progress processed completes 50%-70%, to module outer surface into
Row is reinforced, and then proceedes to paint case making process；Preferably, it is in mesh reinforcement to module outer surface using wire.And adjacent two
Between one metal wire at intervals of 10-50mm.
Step 4, forms the formwork completed after the completion of shell processed by dewaxing, roasting；
Step 5, formwork is cast according to technological requirement, has been cast cold according to being needed into water cooling requirement to formwork
But position carries out pressure cooling treatment by immersion, that is, completes the solidification of casting.Example, the formwork that will can have been cast
Immersion cooling treatment is carried out in bosh.
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
1 structure of casting of certain II type retaining ring is cyclic structure (as shown in Figure 1), cross sectional shape for dies (such as
Shown in Fig. 2), technological design when, lower part trigonum is always there are thermal center, it is difficult to thoroughly eliminate, ultimately results in the position and produces shrinkage cavity
And shrinkage defect.According to the invention, using process program as shown in Figure 3 and Figure 4, according to the shape of the casting 1 of II type retaining rings
Sprue 2 and cross gate 3 and riser 4 and ingate 5 are set respectively with technological requirement and determine their position, first
It is immersed depth 30mm to carry out simulation analysis to obtain immersion technological parameter with ProCAST softwares, soaking time 10 seconds；Making wax
After mould completes wax-pattern group mould, coat shell processed to wax-pattern by technique, when paint case making completes the 4th layer, useIron wire
Unfinished formwork is reinforced, iron wire interval 40mm or so, in mesh reinforcement, certainly, according to different casting structure and technique
It is required that such as the distance between the wire of iron wire etc can be needed to be arranged to 10mm, 30mm even 50mm according to reinforcing.So
After complete 3 coating shell process next；After dewaxing, roasting, the casting stainless steel water in formwork, in casting complete 8 seconds
The formwork for being cast with molten steel is dipped vertically into the formwork that after 10 seconds, will do not cooled down completely in the frame bucket of depth of water 30mm in special sink
Take out, be subsequently placed into special sand hopper and continue to cool down.By X-ray detection, casting lower part trigonum is lacked without shrinkage cavity and shrinkage porosite
Fall into, Internal Quality of Cast is completed to meet drawing and technical protocol requirement.
Embodiment 2：
For certain shell casting 1 as shown in figure 5, casting weight reaches 13Kg, when technological design, uses the horizontal technique of top riser, actual
During cast, often there is both sides flange base and shrinkage cavity or shrinkage defect occur, through application the invention be used for control model casting
The method of casting solidification, after cast process simulation software emulation, it is immersed depth 50mm to obtain immersion technological parameter, during immersion
Between be not less than 35 seconds.In actual production, according to the technique when paint case making completes the 7th layer, useIron wire by mould
Shell is reinforced, and iron wire interval 50mm or so, in mesh reinforcement, then completes 3 coating shell process next；Then through dewaxing, roasting
Toward casting stainless steel water in the formwork completed after burning, the formwork for being cast with molten steel is dipped vertically into casting complete 15 seconds special
The formwork not cooled down completely is placed into special sand hopper and continues to cool down after 35 seconds in the frame bucket of depth of water 50mm in sink.Pass through
Casting anatomy verification, the shrinkage cavity or shrinkage defect that casting both sides flange base occurs thoroughly eliminate.
Claims (6)
- A kind of 1. method for controlling model casting casting solidification, it is characterised in that comprise the following steps：Step 1, confirms the casting parameter of model casting, and determines to carry out the formwork after casting the parameter of immersion cooling；Step 2, requires to make wax-pattern according to casting, wax-pattern is combined into module；Step 3, coats shell processed in the module, when shell number progress processed completes 50%-70%, to the module appearance Face is reinforced, and then proceedes to paint case making process；Step 4, forms the formwork completed after the completion of shell processed by dewaxing, roasting；Step 5, the formwork is cast according to technological requirement, and having cast needs the formwork according into water cooling requirement The position to be cooled down carries out immersion cooling treatment, that is, completes the solidification of casting.
- A kind of 2. method for controlling model casting casting solidification as claimed in claim 1, it is characterised in that the step The concrete mode reinforced in three to the module outer surface is：The module outer surface is added in netted using wire Gu.
- 3. a kind of method for controlling model casting casting solidification as claimed in claim 2, it is characterised in that two adjacent Between the wire at intervals of 10-50mm.
- A kind of 4. method for controlling model casting casting solidification as claimed in claim 1, it is characterised in that the step Simulation analysis are carried out using ProCAST softwares obtain the parameter soaked and cooled down in one.
- 5. a kind of method for controlling model casting casting solidification as described in claim 1 or 4, it is characterised in that described Immersion cooling parameter includes immersed depth and soaking time.
- A kind of 6. method for controlling model casting casting solidification as claimed in claim 1, it is characterised in that the step The formwork cast is subjected to immersion cooling treatment in bosh in five.
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| CN201711167851.5A CN107931525B (en) | 2017-11-21 | 2017-11-21 | Method for controlling solidification of investment casting |
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| CN201711167851.5A CN107931525B (en) | 2017-11-21 | 2017-11-21 | Method for controlling solidification of investment casting |
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| CN107931525A true CN107931525A (en) | 2018-04-20 |
| CN107931525B CN107931525B (en) | 2020-10-30 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396345A (en) * | 2018-12-10 | 2019-03-01 | 中国船舶重工集团公司第十二研究所 | A method of for investment casting formwork part Quench |
| CN109482818A (en) * | 2018-12-14 | 2019-03-19 | 山西天海泵业有限公司 | Model casting locally dips in water-cooling method |
| CN109570444A (en) * | 2018-09-30 | 2019-04-05 | 鹰普航空零部件（无锡）有限公司 | A kind of manufacturing process of complex-shaped surface mould stainless cast steel part |
| CN110711842A (en) * | 2018-07-12 | 2020-01-21 | 无锡市东明冠特种金属制造有限公司 | Directional solidification casting method of radiation finned tube |
| CN110938731A (en) * | 2019-12-24 | 2020-03-31 | 陕西宏远航空锻造有限责任公司 | Method for improving rust resistance of investment casting austenitic stainless steel |
| CN111957890A (en) * | 2020-06-30 | 2020-11-20 | 中国航发南方工业有限公司 | Preparation method of formwork with controllable heat dissipation conditions |
| CN112756554A (en) * | 2020-12-24 | 2021-05-07 | 南通海泰科特精密材料有限公司 | Shell making process method for preventing dewaxing, cracking and wax infiltration of fused quartz mould shell |
| 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 |
| CN116274869A (en) * | 2022-12-30 | 2023-06-23 | 哈尔滨工业大学 | Aluminum alloy investment casting device and casting method using device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110711842A (en) * | 2018-07-12 | 2020-01-21 | 无锡市东明冠特种金属制造有限公司 | Directional solidification casting method of radiation finned tube |
| CN109570444A (en) * | 2018-09-30 | 2019-04-05 | 鹰普航空零部件（无锡）有限公司 | A kind of manufacturing process of complex-shaped surface mould stainless cast steel part |
| CN109396345A (en) * | 2018-12-10 | 2019-03-01 | 中国船舶重工集团公司第十二研究所 | A method of for investment casting formwork part Quench |
| CN109482818A (en) * | 2018-12-14 | 2019-03-19 | 山西天海泵业有限公司 | Model casting locally dips in water-cooling method |
| CN110938731A (en) * | 2019-12-24 | 2020-03-31 | 陕西宏远航空锻造有限责任公司 | Method for improving rust resistance of investment casting austenitic stainless steel |
| CN111957890A (en) * | 2020-06-30 | 2020-11-20 | 中国航发南方工业有限公司 | Preparation method of formwork with controllable heat dissipation conditions |
| CN112756554A (en) * | 2020-12-24 | 2021-05-07 | 南通海泰科特精密材料有限公司 | Shell making process method for preventing dewaxing, cracking and wax infiltration of fused quartz mould shell |
| CN112756554B (en) * | 2020-12-24 | 2024-03-05 | 南通海泰科特精密材料有限公司 | Shell making process method for preventing dewaxing, cracking and wax seepage of fused quartz mould shell |
| 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 |
| CN116274869A (en) * | 2022-12-30 | 2023-06-23 | 哈尔滨工业大学 | Aluminum alloy investment casting device and casting method using device |
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