CN1089196A - Integral precision casting process method for high-speed fan impeller - Google Patents
Integral precision casting process method for high-speed fan impeller Download PDFInfo
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- CN1089196A CN1089196A CN 92101951 CN92101951A CN1089196A CN 1089196 A CN1089196 A CN 1089196A CN 92101951 CN92101951 CN 92101951 CN 92101951 A CN92101951 A CN 92101951A CN 1089196 A CN1089196 A CN 1089196A
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- impeller
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005495 investment casting Methods 0.000 title abstract description 3
- 238000005266 casting Methods 0.000 claims abstract description 18
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 15
- 239000010440 gypsum Substances 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229910000743 fusible alloy Inorganic materials 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 244000035744 Hura crepitans Species 0.000 claims description 3
- 229910020830 Sn-Bi Inorganic materials 0.000 claims description 3
- 229910018728 Sn—Bi Inorganic materials 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 230000003746 surface roughness Effects 0.000 abstract description 2
- 238000010923 batch production Methods 0.000 abstract 1
- 229920002457 flexible plastic Polymers 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention relates to a manufacturing process of a fan impeller, in particular to a manufacturing process of an integral precision casting high-speed fan impeller. The aluminum alloy impeller is suitable for aluminum alloy impellers which have complex inner cavities, closed flow channels with spatial curved surfaces, strict size requirements, high surface smoothness requirements and can not be subsequently processed. A metal core box consisting of a low-melting-point blade model with high positioning precision, a flexible plastic fillet strip and the like is adopted, a certain amount of gypsum mixture is poured, the low-melting-point blade model is removed at a certain temperature to form an integral gypsum core with high dimensional precision, and the gypsum core is poured at a certain negative pressure. The non-processing surface roughness of the inner cavity of the manufactured casting is Ra3.2-1.6 mu m, the size precision is higher than the national standard grade 3, and the thinnest wall thickness is 1.4mm, so that the casting is formed completely. The process is economical and practical, and the manufactured impeller has high quality. Is suitable for single-piece or small-batch production.
Description
The present invention relates to the manufacturing process of draught fan impeller, especially make the process of whole smart casting impeller of high-speed fan.
The manufacture method of common water pump vane is to adopt integral sand core, or by the core that some pellets make up, pours into impeller.This method forms the inner chamber of impeller, and dimensional accuracy is low, and rough surface can not following process, impeller that can not making space distortion runner.
For the high turbine rotor of precision prescribed, adopt pattern to process individual blade, be assembled into impeller, because impeller is that its overall mechanical strength and rigidity are low, can not adapt to the condition of running up by the component of machine assembling with spatial warping runner.Its complicate fabrication process requires height, cost height during especially for single-piece or small lot batch manufacture to production equipment.
The purpose of this invention is to provide a kind of improved whole smart process of casting draught fan impeller simple, low cost of manufacture that has, produce the impeller of high-speed fan of required precision height, inner chamber complexity, make it have high dimensional accuracy, high surface finish and higher mechanical strength and rigidity.
The present invention adopts and water earlier gypsum mixture in master pattern, melt the leaf model of master pattern then at a certain temperature, form the runner cavity of space curved surface, make the whole core of draught fan impeller, place in the negative pressure box having the casting mold that uniform temperature combines again, under the certain negative pressure degree, carry out castable.Adopt the addition method to make the space curved surface mould of fan blade, low-pressure casting contains the Sn-Bi low-melting alloy of Bi 40%-50% then, makes the meltability leaf model of master pattern.According to the garden angular radius size of runner, liquid plastics is poured into needed flexiplast garden angle bead.Gypsum mixture is poured onto the can in-core, treat its setting and hardening after, dry again, bake out temperature melts the meltability leaf model in the fuse under 150-200 ℃ of temperature, form the runner die cavity, makes whole core.The casting mold that assembles is embedded in the seal box that fills up dry sand, and plastic sheeting is gone up on the surface again, vacuumizes to reach 0.06～0.01MPa vacuum degree, carries out castable.
Embodiments of the invention:, adopt whole core to form the core cavity surface in order to ensure the impeller channel dimensional accuracy.The invention provides as Fig. 1 master pattern vertical view, Fig. 2 is shown in master pattern front view, Fig. 3 master pattern partial sectional view, at first by the given monomer fan blade space curve equation of design, space curved surface is divided into some tangent planes, calculate the curvilinear coordinate of tangent plane, process the number of metal thin slice then, with the sheet metal stack, refine becomes the shaping dies of leaf model.Low pressure casting in the shaping dies of leaf model, produce smooth surface, size accurately, fusion temperature is 165 ℃ of Sn-Bi low-melting alloy leaf models [6] [7] that contain Bi45%, it accurately is installed on the type in the runner [1] by location lug, runner external form [5] and supporting plate [3] all cooperate on the chassis [2] that is contained in the roof hole [4] that leaves molding and use, external form [5] is made up of two half modules, and they are located, lock by pin-and-hole [8] and bolt [9] respectively.Attach flexiplast garden angle bead [10] at leaf model [6] [7] and the inside and outside type of runner [1] [5] transition position, form the angle, garden of core cavity runner.
The whole core of draught fan impeller adopts fine powder material, and it is in higher (σ 〉=4 * 10 of desired strength below 300 ℃
5Pa), low (σ≤1 * 10 of desired strength under higher temperature (600-700 ℃)
5Pa), gross shrinkage≤0.05%, resistance to thermal shocks are good in the time of 600-700 ℃, and final setting time was at 10-15 minute gypsum mixture, and it is filled a prescription shown in subordinate list 1:
The prescription compound of the gypsum with 65%, 18% silica flour, 8% quartz sand, 8.1% alundum (Al, 0.2% fortifying fibre, 0.7% set retarder is dried to be mixed and to add water after even, Bian Jiashui, stir on the limit, after stirring, static 2 minutes-3 minutes, then it is poured onto in the master pattern that installs exhaust duct, takes core box apart after gypsum mixture solidifies, take out the gypsum core.The meltability leaf model is stayed in the gypsum core.
Fig. 4 is that the gypsum core is dried curve in certain hour and temperature.The gypsum core is pressed the oven dry of Fig. 4 standard, and the low melting point leaf model is dried 150 ℃ and is begun fusing, removes the operation of low-melting alloy residue about 200 ℃.
The foundry goods external form adopts general clay-bonded sand dry type, plays the core mould assembling for about 200 ℃ in the core temperature.
Casting mold places in the negative pressure box that can regulate vacuum, fills up dry sand all around, and plastic sheeting is gone up on the sandbox surface again, places cup on the casting mold in the sandbox, and negative pressure box and vacuum system are joined during cast, and keeping the interior vacuum degree of case is 0.02MPa cast liquid aluminum alloy.Can obtain size accurately, smooth surface, the duplicating fabulous impeller casting that is shaped.
Good effect of the present invention: provide a cover be applicable to the inner chamber water passage surface complex-shaped can't delivery, dimensional requirement accurately, surface smoothness requires the integral forming process method of high, mechanical strength and rigidity requirement height, impeller of high-speed fan foundry goods that production lot is little, low melting point leaf model, angle, flexiplast garden have comprehensively been adopted, the advanced technologies method such as pour into a mould under gypsum core and the negative pressure, its process is economical and practical, and is simple.
Utilize above-mentioned process, made one kilowatt of axial flow CO
2The impeller of high-speed fan foundry goods of laser instrument, this impeller has following characteristics: runner is that double wall is closed, the runner inner chamber is 24 blades of distribution evenly, blade import, outlet are at an angle of 90, and be the spatial warping surface, blade general thickness 2mm, thinnest part are 1.4mm, parts profile size φ 208 * 87mm.
The aluminium impeller casting quality of utilizing above-mentioned technology to make: 24 blade shapings are intact, core cavity surface roughness Ra 3.2-1.6 μ m.Casting dimension accuracy: inlet diameter φ 136mm, full-size deviation≤0.3mm.24 width of flow paths (nominal size 25mm), dimensional discrepancy≤0.19mm.Vane thickness deviation≤0.1mm.Blade face shape meets design equation fully.Casting dimension accuracy: 3 class precisions of GB regulation, it is the highest foundry goods accuracy class of existing GB.
Claims (5)
1, the process of the whole smart casting of a kind of impeller of high-speed fan, it is characterized in that: in master pattern, water earlier gypsum mixture, melt the meltability leaf model of master pattern then at a certain temperature, form the runner cavity of space curved surface, make the whole core of draught fan impeller, place in the negative pressure box having the casting mold that uniform temperature combines again, under the certain negative pressure degree, carry out castable.
2, by the described process of claim 1, it is characterized in that: adopt the addition method to make the space curved surface mould of fan blade, low-pressure casting contains the Sn-Bi low-melting alloy of Bi40%-50% then, makes the meltability leaf model of master pattern.
3, by the described process of claim 1, it is characterized in that:, liquid plastics is poured into required flexiplast garden angle bead according to the garden angular radius size of runner.
4,, it is characterized in that by the described process of claim 1: earlier gypsum mixture is poured onto in the master pattern, treat its setting and hardening after, dry again, bake out temperature melts the meltability leaf model in the fuse under 150 ℃-200 ℃, form the runner die cavity, makes whole core.
5, by the described process of claim 1, it is characterized in that: the casting mold that assembles is embedded in the seal box that fills up dry sand, again plastic sheeting is gone up on the sandbox surface again, vacuumize and reach the 0.06-0.01MPa vacuum degree, carry out castable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92101951 CN1089196A (en) | 1992-03-21 | 1992-03-21 | Integral precision casting process method for high-speed fan impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92101951 CN1089196A (en) | 1992-03-21 | 1992-03-21 | Integral precision casting process method for high-speed fan impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1089196A true CN1089196A (en) | 1994-07-13 |
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ID=4939388
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92101951 Pending CN1089196A (en) | 1992-03-21 | 1992-03-21 | Integral precision casting process method for high-speed fan impeller |
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| CN (1) | CN1089196A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047545C (en) * | 1996-01-17 | 1999-12-22 | 祁殿立 | Section mould assembly of closed impeller and method for making sand mould of closed impeller by said assembly |
| CN1317095C (en) * | 2004-02-25 | 2007-05-23 | 中国科学院金属研究所 | Crystalloid laminae composited from single crystal and directional column crystal and preparing method |
| CN1326646C (en) * | 2005-12-13 | 2007-07-18 | 遵义拓特铸锻有限公司 | Vacuum pump impeller integral casting process |
| CN100389905C (en) * | 2006-04-05 | 2008-05-28 | 中国兵器工业集团第七○研究所 | Processing method of impellor mould of pressurizing unit compressor |
| CN101695741B (en) * | 2009-10-30 | 2011-03-30 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for positioning mold core and mold shell of hollow blade |
| CN102343418A (en) * | 2011-08-29 | 2012-02-08 | 西安西工大超晶科技发展有限责任公司 | Casting method of three-dimensional flow aluminum alloy impeller casting |
| CN102489975A (en) * | 2011-12-15 | 2012-06-13 | 湖南科技大学 | Optimization method for machining process for mine fan blade |
| CN103056599A (en) * | 2011-10-24 | 2013-04-24 | 沈阳黎明航空发动机(集团)有限责任公司 | Preparation method for precise multiple continuous casting blade wax mould blade body forming loose pieces |
| CN103567381A (en) * | 2012-07-25 | 2014-02-12 | 西安轨道交通装备有限责任公司 | Production technology of corner iron support used for external heating or external insulation |
| CN103658536A (en) * | 2014-01-06 | 2014-03-26 | 山东建筑大学 | Fired mold low-pressure casting process of integral type compressor impeller |
| CN103894553A (en) * | 2014-02-28 | 2014-07-02 | 浙江科尔泵业股份有限公司 | Integral impeller casting process of narrow-sprue centrifugal pump and impeller mould case |
| CN104028728A (en) * | 2013-03-05 | 2014-09-10 | 侯伟 | Negative-pressure casting sealed tank for aluminum impeller |
| CN106040990A (en) * | 2016-08-11 | 2016-10-26 | 山东豪迈机械科技股份有限公司 | Manufacturing method and system for gypsum core used for casting of large impeller |
| CN106825386A (en) * | 2017-01-09 | 2017-06-13 | 无锡迪欧机械制造有限公司 | A kind of manufacturing process of twin columns disjunctor supercharging impeller |
| CN109779968A (en) * | 2019-01-22 | 2019-05-21 | 四川贝特风机有限公司 | A kind of air-conditioning draught fan impeller and its manufacturing process |
| CN110842147A (en) * | 2019-11-29 | 2020-02-28 | 西安航天发动机有限公司 | Method for controlling size of closed impeller investment precision casting runner |
| CN111637058A (en) * | 2020-05-25 | 2020-09-08 | 中南大学 | Aluminum alloy impeller of Roots blower, extrusion die and extrusion process |
-
1992
- 1992-03-21 CN CN 92101951 patent/CN1089196A/en active Pending
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047545C (en) * | 1996-01-17 | 1999-12-22 | 祁殿立 | Section mould assembly of closed impeller and method for making sand mould of closed impeller by said assembly |
| CN1317095C (en) * | 2004-02-25 | 2007-05-23 | 中国科学院金属研究所 | Crystalloid laminae composited from single crystal and directional column crystal and preparing method |
| CN1326646C (en) * | 2005-12-13 | 2007-07-18 | 遵义拓特铸锻有限公司 | Vacuum pump impeller integral casting process |
| CN100389905C (en) * | 2006-04-05 | 2008-05-28 | 中国兵器工业集团第七○研究所 | Processing method of impellor mould of pressurizing unit compressor |
| CN101695741B (en) * | 2009-10-30 | 2011-03-30 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for positioning mold core and mold shell of hollow blade |
| CN102343418A (en) * | 2011-08-29 | 2012-02-08 | 西安西工大超晶科技发展有限责任公司 | Casting method of three-dimensional flow aluminum alloy impeller casting |
| CN102343418B (en) * | 2011-08-29 | 2013-07-10 | 西安西工大超晶科技发展有限责任公司 | Casting method of three-dimensional flow aluminum alloy impeller casting |
| CN103056599A (en) * | 2011-10-24 | 2013-04-24 | 沈阳黎明航空发动机(集团)有限责任公司 | Preparation method for precise multiple continuous casting blade wax mould blade body forming loose pieces |
| CN103056599B (en) * | 2011-10-24 | 2015-10-28 | 沈阳黎明航空发动机(集团)有限责任公司 | The preparation method of the shaping loose piece of a kind of precision many continuous castings blade wax mould blade |
| CN102489975A (en) * | 2011-12-15 | 2012-06-13 | 湖南科技大学 | Optimization method for machining process for mine fan blade |
| CN103567381A (en) * | 2012-07-25 | 2014-02-12 | 西安轨道交通装备有限责任公司 | Production technology of corner iron support used for external heating or external insulation |
| CN103567381B (en) * | 2012-07-25 | 2015-10-28 | 西安轨道交通装备有限责任公司 | External heat or the Surgery therapy production technology of bight Zhi Tie |
| CN104028728A (en) * | 2013-03-05 | 2014-09-10 | 侯伟 | Negative-pressure casting sealed tank for aluminum impeller |
| CN103658536A (en) * | 2014-01-06 | 2014-03-26 | 山东建筑大学 | Fired mold low-pressure casting process of integral type compressor impeller |
| CN103894553A (en) * | 2014-02-28 | 2014-07-02 | 浙江科尔泵业股份有限公司 | Integral impeller casting process of narrow-sprue centrifugal pump and impeller mould case |
| CN103894553B (en) * | 2014-02-28 | 2016-01-13 | 浙江科尔泵业股份有限公司 | The impeller integral casting process of narrow runner centrifugal pump and impeller formwork thereof |
| CN106040990A (en) * | 2016-08-11 | 2016-10-26 | 山东豪迈机械科技股份有限公司 | Manufacturing method and system for gypsum core used for casting of large impeller |
| CN106825386A (en) * | 2017-01-09 | 2017-06-13 | 无锡迪欧机械制造有限公司 | A kind of manufacturing process of twin columns disjunctor supercharging impeller |
| CN109779968A (en) * | 2019-01-22 | 2019-05-21 | 四川贝特风机有限公司 | A kind of air-conditioning draught fan impeller and its manufacturing process |
| CN109779968B (en) * | 2019-01-22 | 2021-09-28 | 四川贝特风机有限公司 | Air conditioner fan impeller and manufacturing process thereof |
| CN110842147A (en) * | 2019-11-29 | 2020-02-28 | 西安航天发动机有限公司 | Method for controlling size of closed impeller investment precision casting runner |
| CN110842147B (en) * | 2019-11-29 | 2021-03-05 | 西安航天发动机有限公司 | Method for controlling size of closed impeller investment precision casting runner |
| CN111637058A (en) * | 2020-05-25 | 2020-09-08 | 中南大学 | Aluminum alloy impeller of Roots blower, extrusion die and extrusion process |
| CN111637058B (en) * | 2020-05-25 | 2021-06-25 | 中南大学 | Aluminum alloy impeller of Roots blower, extrusion die and extrusion process |
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