CN109093069A - A kind of wax-pattern preparation method for precision-investment casting - Google Patents
A kind of wax-pattern preparation method for precision-investment casting Download PDFInfo
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- CN109093069A CN109093069A CN201810866496.9A CN201810866496A CN109093069A CN 109093069 A CN109093069 A CN 109093069A CN 201810866496 A CN201810866496 A CN 201810866496A CN 109093069 A CN109093069 A CN 109093069A
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- wax
- mold
- pattern
- casting
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- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 238000005495 investment casting Methods 0.000 title claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 36
- 238000005266 casting Methods 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000000498 cooling water Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 7
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 230000001680 brushing effect Effects 0.000 claims description 8
- 239000010687 lubricating oil Substances 0.000 claims description 8
- 238000010257 thawing Methods 0.000 claims description 2
- 230000008602 contraction Effects 0.000 abstract description 9
- 239000000155 melt Substances 0.000 abstract description 4
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 14
- 238000007493 shaping process Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011017 operating method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a kind of wax-pattern preparation methods for precision-investment casting, include the following steps, (1) mold clamping (2) prepares wax material: wax material is added in the holding furnace of wax injector, raise the temperature to 90 ~ 100 DEG C, after wax material melts completely, the silicon-carbide particle of 6 ~ 14 μm of granularity, 3 ~ 5wt% of content is added while stirring, stands 20 ~ 30min after the completion of being added, the cooling water that 20 ~ 25 DEG C are injected in wax injector cooling bath, for use to 55 ~ 60 DEG C by wax temperature drop；(3) it suppresses wax-pattern: the wax material in wax injector is injected in mold cavity under the pressure of 0.3 ~ 0.5MPa by casting rifle, when having wax discharge in gas vent, stop casting, it is then turned on mold water-cooling system, flow control is in 5 ~ 8L/min, after temperature thermocouple detects wax temperature≤35 DEG C, opens mold and take out wax-pattern.The present invention plays the role of the intensity that skeleton enhancing improves wax-pattern, effectively reduces the dimensional contraction and deformation of wax-pattern, the wax-pattern precision of preparation can achieve ± 0.5mm, and stable contraction rate is in 0.40%.
Description
Technical field:
The present invention relates to a kind of wax-pattern preparation methods for precision-investment casting, are particularly suitable for aluminum alloy cabin components wax-pattern
Preparation, belongs to precision aluminium-alloy casting technology field.
Background technique:
With light-weighted growth requirement, complex thin-wall aluminium alloy element applies day the fields such as aerospace, weapons, ship
It is beneficial extensive.Fusible pattern plaster mold vacuum pressure casting technology is to integrate the advanced casting of model casting, Vacuum Filling, compression solidification
Make technology, it is castable produce thin-walled, entirety, structure is complicated and Near net shape precision casting, have surface roughness it is low (Ra3.2 ~
Ra6.3), the features such as dimensional accuracy high (CT5 ~ CT7), deformation small (≤1mm/1000mm).
It is taken out currently, the preparation of precision-investment casting wax-pattern is mainly adopted after being molded with a mold, then hot by 40 ~ 50 DEG C
Wax-pattern places cooling in screw clamp, but cooling meat is big in a free state for wax-pattern, and forming process lacks monitoring temperature, directly leads
Cause the dimensional accuracy of wax-pattern can not stability contorting.For the wax-pattern of thin-wall member (≤3.5mm), if using conventional wax material at
The intensity of type, thin-walled position is low, and the dimensional accuracy of casting and surface after seriously will affect molding are deformed during modulus and group type
Quality.
Summary of the invention:
The purpose of the present invention is to provide one kind can effectively reduce the dimensional contraction of wax-pattern and casting for precision-investment for deformation
The wax-pattern preparation method made.
To achieve the goals above, the present invention is implemented as follows: a kind of wax-pattern preparation side for precision-investment casting
Method, comprising the following steps:
(1) it mold clamping: first cleans mold and is placed on lower plate pair in mold inner-cavity brushing lubricating oil, then by core model with hairbrush
The groove answered, covers upper cover plate, is tightened by bolts the left and right external mold of mold, guarantees fit clearance≤0.15mm, is finally arranging
Stomata is inserted into thermocouple, and connects cooling water pipe；
(2) it prepares wax material: wax material is added in the holding furnace of wax injector, raise the temperature to 90 ~ 100 DEG C, it is complete to wax material
After thawing, the silicon-carbide particle of 6 ~ 14 μm of granularity, 3 ~ 5wt% of content is added while stirring, stands 20 ~ 30min after the completion of being added,
The cooling water that 20 ~ 25 DEG C are injected in wax injector cooling bath, for use to 55 ~ 60 DEG C by wax temperature drop；
(3) it suppresses wax-pattern: the wax material in wax injector is injected in mold cavity under the pressure of 0.3 ~ 0.5MPa by casting rifle,
When having wax discharge in gas vent, stops casting, be then turned on mold water-cooling system, flow control works as thermometric in 5 ~ 8L/min
After thermocouple detects wax temperature≤35 DEG C, opens mold and take out wax-pattern.
The intensity of wax-pattern can be improved using wax-pattern prepared by above-mentioned preparation method, effectively reduce wax-pattern dimensional contraction and
Deformation, is effectively guaranteed the dimensional accuracy and surface quality of wax-pattern.
Preferably, the mold includes the type chamber being made of upper cover plate, lower plate, left outside mould, right external mold and core model, core model
It is fixed by the groove of upper cover plate and lower plate, casting hole and gas vent are opened on upper cover plate, and left outside mould and right external mold pass through spiral shell
It tethers and connects.
Further, the water-cooling system includes the recirculated water cooling channel being arranged in inside left outside mould and right external mold, and
The water inlet communicated with recirculated water cooling channel and discharge outlet are provided on bottom surface.
Preferably, the thermometer hole communicated with type chamber is provided on the upper cover plate.
Preferably, casting hole aperture is φ 10-15mm, and oral area offers 5-8 ° of taper.
Preferably, the thermometer hole aperture is φ 3-5mm.
Preferably, the recirculated water cooling channel includes 4 radial passages and 3 longitudinal circular passages, and is mutually communicated, institute
The aperture for stating recirculated water cooling channel is φ 20mm.
The utility model has the advantages that
1, forming die for wax pattern of the invention is taken out of the heat of wax material by establishing circulating water cooling system on external mold, is realized
The rapid cooling of wax-pattern improves the dimensional stability and production efficiency of wax-pattern, and molding die integrated machine adds, precision up to ±
The dimensional accuracy and surface quality of wax-pattern is effectively guaranteed in 0.15mm.
2, it joined the small silicon-carbide particle of 3 ~ 5wt% thermal expansion coefficient in the wax material that the present invention prepares, play skeleton enhancing
The effect for improving the intensity of wax-pattern, effectively reduces the dimensional contraction and deformation of wax-pattern, and the wax-pattern precision of preparation can achieve ±
0.5mm, stable contraction rate is in 0.40%.
3, for precision-investment casting, the intensity and precision of wax-pattern directly determine the dimensional accuracy and surface matter of casting
Amount, wax-pattern preparation method of the invention, mould and die accuracy is high, and preparation process flow is clear, stability is high, in the thin-walled of certain model
Batch production is realized on aluminum alloy cabin components, application value is higher, and industrial potential is huge.
Detailed description of the invention:
Fig. 1 is aluminum alloy cabin components forming die for wax pattern；
Fig. 2 is the structure chart in recirculated water cooling channel.
Specific embodiment:
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing, but the invention is not limited to this
A little embodiments, any improvement or replacement on the present embodiment essence spirit still fall within the required guarantor of the claims in the present invention
The range of shield.
Embodiment 1: as depicted in figs. 1 and 2, a kind of shaping investment pattern for precision-investment casting is present embodiments provided
Mold, including the type chamber 3 being made of upper cover plate 5, lower plate 1, left outside mould 2, right external mold 7 and core model 8, core model by upper cover plate and
The groove being arranged on lower plate is fixed, and casting hole 4 and gas vent 5 are provided on upper cover plate and communicate with type chamber, left outside mould and the right side
External mold, which is bolted, to be integrated, and its fit clearance≤0.15mm, may be selected but be not limited to 0.15mm, 0.10mm,
0.05mm etc..
Wherein, casting hole aperture is φ 10-15mm, and oral area offers 5-8 ° of taper.Casting hole aperture may be selected
But it is not limited to φ 10mm, φ 11mm, φ 12mm, φ 13mm, φ 14mm or φ 15mm, taper may be selected but be not limited to 5 °, 6 °, 7 °
Or 8 ° etc..
And the aperture of the gas vent is φ 3-5mm, may be selected but is not limited to φ 3mm, φ 4mm or φ 5mm.
In addition, being additionally provided with water-cooling system in the mold of the present embodiment, the water-cooling system includes being arranged in left outside mould
With the recirculated water cooling channel inside right external mold, and be provided on bottom surface the water filling port communicated with recirculated water cooling channel 9 and
Discharge outlet.
In the present embodiment, the recirculated water cooling channel is arranged in left outside mould and right external mold, comprising 4 radial passages and
3 longitudinal circular passages, and be mutually communicated, the aperture in the recirculated water cooling channel is φ 20mm.
The present embodiment is using certain thin-wall aluminum alloy cabin casting as application, specific profile size: high 370mm, big end circle
Φ 248mm, small end circle Φ 220mm, main body wall thickness 2.7mm, typical thin-walled cabin casting structure, thin-walled accounting is more than 80%, inner cavity
Longitudinal rib containing 8mm wide 6, the round boss of Φ 86mm 1, the square boss of 63mm × 63mm 1.
The operating procedure of aluminum alloy cabin components shaping investment pattern carries out as follows:
(1) first with industrial alcohol washes mold on pressure wax platform, and with hairbrush in mold inner-cavity brushing lubricating oil, then by core model
Be placed on the corresponding groove of lower plate, cover upper cover plate, be tightened by bolts the left and right external mold of mold, guarantee fit clearance≤
0.15mm is finally inserted into thermocouple in gas vent, and connects cooling water pipe.
(2) wax material is added in the holding furnace of wax injector, raises the temperature to 95 DEG C, after wax material melts completely, side
The silicon-carbide particle that 8 μm of granularity, content 3wt% is added in side is stirred, 20min is stood after the completion of being added, is infused in wax injector cooling bath
The cooling water for entering 25 DEG C, for use to 60 DEG C by wax temperature drop.
(3) wax material in wax injector is injected in mold cavity under the pressure of 0.4MPa by casting rifle, to thermometer hole
In when having wax discharge, stop casting, be then turned on mold water-cooling system, flow control is in 6L/min, when temperature thermocouple detects
To after wax temperature≤35 DEG C, mold water-cooling system is closed.
(4) mold is dismantled, upper cover plate is first opened and takes out 8 fast core models, then left and right external mold is opened and takes out wax-pattern, is used
Blade is hung except the wax bits on wax-pattern, and the brushing lubricating oil on mold prepares casting again after assembling.
Implementation result: the precision ± 0.42mm of aluminum alloy cabin components wax-pattern, axial shrinkage rate≤0.35%, radial contraction
Rate≤0.30%.
Embodiment 2: the present embodiment is using certain thin-wall aluminum alloy cabin casting as application, specific profile size: high
345mm, big end justify Φ 135mm, and small end justifies Φ 132mm, main body wall thickness 8.0mm, typical thin-walled cabin casting structure, thin-walled accounting
More than 85%, longitudinal rib of the inner cavity containing 6mm wide 8, Φ 20mm circle small boss 4, the square boss of 50mm × 50mm 1.
The operating procedure of aluminum alloy cabin components shaping investment pattern carries out as follows:
(1) first with industrial alcohol washes mold on pressure wax platform, and with hairbrush in mold inner-cavity brushing lubricating oil, then by core model
Be placed on the corresponding groove of lower plate, cover upper cover plate, be tightened by bolts the left and right external mold of mold, guarantee fit clearance≤
0.15mm is finally inserted into thermocouple in gas vent, and connects cooling water pipe.
(2) wax material is added in the holding furnace of wax injector, raises the temperature to 90 DEG C, after wax material melts completely, side
The silicon-carbide particle that 6 μm of granularity, content 4wt% is added in side is stirred, 25min is stood after the completion of being added, is infused in wax injector cooling bath
The cooling water for entering 20 DEG C, for use to 60 DEG C by wax temperature drop.
(3) wax material in wax injector is injected in mold cavity under the pressure of 0.3MPa by casting rifle, to thermometer hole
In when having wax discharge, stop casting, be then turned on mold water-cooling system, flow control is in 5L/min, when temperature thermocouple detects
To after wax temperature≤35 DEG C, mold water-cooling system is closed.
(4) mold is dismantled, upper cover plate is first opened and takes out core model, then left and right external mold is opened and takes out wax-pattern, using knife
Piece is hung except the wax bits on wax-pattern, and the brushing lubricating oil on mold prepares casting again after assembling.
Implementation result: the precision ± 0.45mm of aluminum alloy cabin components wax-pattern, axial shrinkage rate≤0.37%, radial contraction
Rate≤0.34%.
Embodiment 3: the present embodiment is using certain thin-wall aluminum alloy cabin casting as application, specific profile size: high
435mm, big end justify Φ 245mm, and small end justifies Φ 230mm, main body wall thickness 3.5mm, typical thin-walled cabin casting structure, thin-walled accounting
More than 75%, longitudinal rib of the inner cavity containing 10mm wide 4, Φ 25mm circle small boss 10, Φ 78mm round boss 4.
The operating procedure of aluminum alloy cabin components shaping investment pattern carries out as follows:
(1) first with industrial alcohol washes mold on pressure wax platform, and with hairbrush in mold inner-cavity brushing lubricating oil, then by core model
Be placed on the corresponding groove of lower plate, cover upper cover plate, be tightened by bolts the left and right external mold of mold, guarantee fit clearance≤
0.15mm is finally inserted into thermocouple in gas vent, and connects cooling water pipe.
(2) wax material is added in the holding furnace of wax injector, raises the temperature to 100 DEG C, after wax material melts completely, side
The silicon-carbide particle that 10 μm of granularity, content 5wt% is added in side is stirred, 30min is stood after the completion of being added, in wax injector cooling bath
The cooling water of 30 DEG C of injection, for use to 55 DEG C by wax temperature drop.
(3) wax material in wax injector is injected in mold cavity under the pressure of 0.5MPa by casting rifle, to thermometer hole
In when having wax discharge, stop casting, be then turned on mold water-cooling system, flow control is in 7L/min, when temperature thermocouple detects
To after wax temperature≤35 DEG C, mold water-cooling system is closed.
(4) mold is dismantled, upper cover plate is first opened and takes out core model, then left and right external mold is opened and takes out wax-pattern, using knife
Piece is hung except the wax bits on wax-pattern, and the brushing lubricating oil on mold prepares casting again after assembling.
Implementation result: the precision ± 0.47mm of aluminum alloy cabin components wax-pattern, axial shrinkage rate≤0.40%, radial contraction
Rate≤0.36%.
Claims (7)
1. a kind of wax-pattern preparation method for precision-investment casting, it is characterised in that: include the following steps,
(1) it mold clamping: first cleans mold and is placed on lower plate pair in mold inner-cavity brushing lubricating oil, then by core model with hairbrush
The groove answered, covers upper cover plate, is tightened by bolts the left and right external mold of mold, guarantees fit clearance≤0.15mm, is finally arranging
Stomata is inserted into thermocouple, and connects cooling water pipe；
(2) it prepares wax material: wax material is added in the holding furnace of wax injector, raise the temperature to 90 ~ 100 DEG C, it is complete to wax material
After thawing, the silicon-carbide particle of 6 ~ 14 μm of granularity, 3 ~ 5wt% of content is added while stirring, stands 20 ~ 30min after the completion of being added,
The cooling water that 20 ~ 25 DEG C are injected in wax injector cooling bath, for use to 55 ~ 60 DEG C by wax temperature drop；
(3) it suppresses wax-pattern: the wax material in wax injector is injected in mold cavity under the pressure of 0.3 ~ 0.5MPa by casting rifle,
When having wax discharge in gas vent, stops casting, be then turned on mold water-cooling system, flow control works as thermometric in 5 ~ 8L/min
After thermocouple detects wax temperature≤35 DEG C, opens mold and take out wax-pattern.
2. wax-pattern preparation method as described in claim 1, it is characterised in that: the mold includes by upper cover plate, lower plate, a left side
The type chamber that external mold, right external mold and core model are constituted, core model are fixed by the groove of upper cover plate and lower plate, and casting hole and gas vent are opened
On upper cover plate, left outside mould and right external mold are bolted.
3. wax-pattern preparation method as claimed in claim 1 or 2, it is characterised in that: the water-cooling system includes being arranged left outside
Recirculated water cooling channel inside mould and right external mold, and be provided on bottom surface the water inlet communicated with recirculated water cooling channel and
Discharge outlet.
4. wax-pattern preparation method as claimed in claim 3, it is characterised in that: be provided on the upper cover plate and communicated with type chamber
Thermometer hole.
5. the wax-pattern preparation method as described in any of the above-described claim, it is characterised in that: casting hole aperture is φ 10-
15mm, oral area offer 5-8 ° of taper.
6. the wax-pattern preparation method as described in any of the above-described claim, it is characterised in that: the thermometer hole aperture is φ 3-
5mm。
7. the wax-pattern preparation method as described in any of the above-described claim, it is characterised in that: the recirculated water cooling channel includes 4
A radial passage and 3 longitudinal circular passages, and be mutually communicated, the aperture in the recirculated water cooling channel is φ 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810866496.9A CN109093069B (en) | 2018-08-01 | 2018-08-01 | Wax mold preparation method for precision investment casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810866496.9A CN109093069B (en) | 2018-08-01 | 2018-08-01 | Wax mold preparation method for precision investment casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109093069A true CN109093069A (en) | 2018-12-28 |
| CN109093069B CN109093069B (en) | 2020-09-08 |
Family
ID=64848364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810866496.9A Active CN109093069B (en) | 2018-08-01 | 2018-08-01 | Wax mold preparation method for precision investment casting |
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| Country | Link |
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| CN (1) | CN109093069B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110355329A (en) * | 2019-07-02 | 2019-10-22 | 上海交通大学 | A kind of high conductivity hot investment casting wax-pattern and preparation method thereof |
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| CN203316674U (en) * | 2013-05-25 | 2013-12-04 | 衡阳市嘉励运动器材有限公司 | Wax injection machine capable of controlling temperature of die |
| CN104439053A (en) * | 2014-11-13 | 2015-03-25 | 柳州金特机械有限公司 | Wax mold manufacturing method of melting mold precision-casting bridge shell |
| CN104972063A (en) * | 2015-07-17 | 2015-10-14 | 哈尔滨工业大学 | Method for manufacturing wax mould for precision investment casting |
| CN206535984U (en) * | 2017-02-27 | 2017-10-03 | 上海中洲特种合金材料股份有限公司 | Investment casting mold |
| CN108031792A (en) * | 2018-01-10 | 2018-05-15 | 芜湖市金贸流体科技股份有限公司 | A kind of cured material of silica sol precision casting and the mold making process based on the wax material |
-
2018
- 2018-08-01 CN CN201810866496.9A patent/CN109093069B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203316674U (en) * | 2013-05-25 | 2013-12-04 | 衡阳市嘉励运动器材有限公司 | Wax injection machine capable of controlling temperature of die |
| CN104439053A (en) * | 2014-11-13 | 2015-03-25 | 柳州金特机械有限公司 | Wax mold manufacturing method of melting mold precision-casting bridge shell |
| CN104972063A (en) * | 2015-07-17 | 2015-10-14 | 哈尔滨工业大学 | Method for manufacturing wax mould for precision investment casting |
| CN206535984U (en) * | 2017-02-27 | 2017-10-03 | 上海中洲特种合金材料股份有限公司 | Investment casting mold |
| CN108031792A (en) * | 2018-01-10 | 2018-05-15 | 芜湖市金贸流体科技股份有限公司 | A kind of cured material of silica sol precision casting and the mold making process based on the wax material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110355329A (en) * | 2019-07-02 | 2019-10-22 | 上海交通大学 | A kind of high conductivity hot investment casting wax-pattern and preparation method thereof |
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| CN109093069B (en) | 2020-09-08 |
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