CN105414488A - Manufacturing method of flowing channel core of turbine housing - Google Patents
Manufacturing method of flowing channel core of turbine housing Download PDFInfo
- Publication number
- CN105414488A CN105414488A CN201510972506.3A CN201510972506A CN105414488A CN 105414488 A CN105414488 A CN 105414488A CN 201510972506 A CN201510972506 A CN 201510972506A CN 105414488 A CN105414488 A CN 105414488A
- Authority
- CN
- China
- Prior art keywords
- core
- sand
- mouth
- turbine case
- precoated sand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000004576 sand Substances 0.000 claims abstract description 49
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 10
- 238000007711 solidification Methods 0.000 claims description 9
- 230000008023 solidification Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 238000007596 consolidation process Methods 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 235000019441 ethanol Nutrition 0.000 claims description 5
- 230000007306 turnover Effects 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 9
- 238000005266 casting Methods 0.000 abstract description 6
- 239000011148 porous material Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000002893 slag Substances 0.000 abstract 1
- 239000003818 cinder Substances 0.000 description 7
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 239000003110 molding sand Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 244000035744 Hura crepitans Species 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention provides a manufacturing method of a flowing channel core of a turbine housing. The method is characterized in that a thick and big part of the flowing channel core of the turbine housing is hollowed out and then filled with crude silica sand; an opening is sealed with precoated sand which is mixed with alcohol in a certain proportion; then the flowing channel core is roasted and solidified for use. The method has the beneficial effects that the air release amount of a sand core can be greatly decreased, and the ratio of air-slag pore defect of a casting can be reduced to a great extent, so that the product quality can be improved.
Description
Technical field
The present invention relates to casting field, specifically a kind of core-making method of turbine case runner core.
Background technology
Turbine case casting structure is comparatively complicated, and required precision is higher.The production method of current domestic turbine case foundry goods is mainly the full involucrum technique of precoated sand, even if produce on tide mould sand line, the profile major part of turbine case is also wrapped up by precoated sand core, only has running gate system and rising head etc. by tide mould sand moulding out.The turbine case dimensional accuracy of precoated sand involucrum explained hereafter is higher, and the probability producing the defect such as sand holes, sand washing is less, and casting yield is higher.
But the turbine case air inlet mouth of pipe of some special construction more slightly, comparatively deeply, the runner core air inlet mouth of pipe place of such turbine case will be comparatively thick.In the coremaking process of turbine case, under certain hardening time and solidification temperature, the position that runner core is thinner has had cured, but thick large part only has outer solidification, and inside exists greensand.In the process of casting pouring, can react with the organic matter such as the resin in precoated sand after molten iron contacts with core, produce gas, and there is greensand due to inside in thick large part, then gas forming amount can be larger, considerably increases the defect such as the pore at turbine case mouth of pipe position, gas cinder hole tendency like this.
Summary of the invention
In view of the defect that above-mentioned prior art exists, the object of the invention is to propose a kind of turbine case runner core core-making method, the local gas forming amount of core can be reduced, and then reduce foundry goods in this position generation gas cinder hole defect.
Object of the present invention is achieved through the following technical solutions:
A core-making method for turbine case runner core, comprises the steps,
S1, on core shooter equipment, produce this core, the material of wherein said core is precoated sand, and hot box process parameter is solidification temperature: 250 ± 10 DEG C, shooting time: 4-5s, hardening time 140s;
S2, by penetrating sand mouth, greensand uncured in core to be outwelled by coremaking equipment turnover mould, forming cavity;
S3, fill out former silica sand by the cavity forming the core of cavity, and fill out consolidation;
S4, by with the precoated sand of material of the same race that adopts in S1 step and the absolute ethyl alcohol of 99.7% ethanol content mixed in the ratio of 5:1 after, the Sha Kou that penetrates of core is shut;
S5, the core sealing mouth are placed in baking oven, toast 1.5 hours, can use after the precoated sand solidification of sealing at 180 DEG C.
Wherein, described S2 can substitute by following steps: using air gun to be carried out blowing sky by greensand uncured in core by penetrating sand mouth, forming cavity.
Preferably, in described S3, be filled to former silica sand and penetrate sand mouth 10mm place and fill out consolidation.
Beneficial effect of the present invention is: the gas forming amount that greatly can reduce core, reduces the ratio that foundry goods produces gas cinder hole defect to a great extent, improves the quality of product.
Below with reference to Figure of description, the specific embodiment of the present invention is described in further detail, is easier to understand to make technical solution of the present invention, grasps.
Accompanying drawing explanation
Fig. 1 is runner core partial sectional view of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, carry out clear, complete description to the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the core-making method of a kind of turbine case runner core that the present embodiment discloses, comprises the steps:
S1, on core shooter equipment, produce this core 2, the material of wherein said core 2 is precoated sand, and hot box process parameter is solidification temperature: 250 ± 10 DEG C, shooting time: 4-5s, hardening time 140s;
S2, by penetrating sand mouth 1, greensand uncured in core to be outwelled by coremaking equipment turnover mould, forming cavity 3; Or using air gun to be carried out blowing sky by greensand uncured in core by penetrating sand mouth, forming cavity 3;
S3, penetrate be filled to former silica sand in the cavity 3 forming the core of cavity at sand mouth about 10mm place, and fill out consolidation;
S4, by with the precoated sand of material of the same race that adopts in S1 step and the absolute ethyl alcohol of 99.7% ethanol content mixed in the ratio of 5:1 after, the Sha Kou that penetrates of core is shut;
S5, the core sealing mouth are placed in baking oven, toast 1.5 hours, can use after the precoated sand solidification of sealing at 180 DEG C.
It should be noted that: core shooter equipment utilizes compressed air molding sand to be injected equably the pre-consolidation of sandbox, and then apply pressure and carry out compacting, belong to routine techniques.In general foundry goods, non-metallic inclusion often exists with following form: oxide: FeO, Fe
2o
3, MnO, Al
2o
3, SiO
2, MgO etc., silicate: FeSiO
4, MnSiO
4, FeO Al
2o
3siO
2deng.Core is by precoated sand curing molding at a certain temperature.Precoated sand refers to that namely sand grain surface is covered with molding sand or the core sand of one deck hard resin film before moulding, and the resin of hard resin film gas forming amount in the process of Filling Processes of Castings is very large, and the molten iron under gas and high temperature reacts, and produces the defects such as cinder hole.And the thick large part of turbine case runner core exists greensand, then gas forming amount can be larger, considerably increases the defect such as the pore at turbine case mouth of pipe position, gas cinder hole tendency like this.
The material that former silica sand is got angry without generations such as adhered resins due to surface, so at high temperature can not get angry.The thick large part of runner core fills former silica sand after emptying, and greatly reduces the gas forming amount of the thick large part of runner core, and then reduces the ratio producing gas cinder hole defect gradually.
Re-entrant portion to be filled after full former silica sand with the precoated sand of material of the same race and the absolute ethyl alcohol of 99.7% ethanol content in the mixed rear sealing of the ratio of 5:1, and puts in baking oven and toast, and enables core print intensity reach the intensity of core body.Because precoated sand itself is the molding sand being covered with one deck hard resin at former sand grain surface, precoated sand meeting curing molding in case of heating, its principle is exactly the forming principle of hot core.Why select the precoated sand of material of the same race, object is the difference of the aspect such as gas forming amount, the intensity generation eliminated between unlike material precoated sand.Be consider that the volatility of ethanol is good on the one hand by the object of the absolute ethyl alcohol of 99.7% content, farthest vapor away in Baking out process, to alleviate or to eliminate its impact on precoated sand solidification; Be utilize the absolute ethyl alcohol of 99.7% content to be set in together by the mixing of precoated sand physics on the other hand, be convenient to, with it, core is sealed later turnover; If otherwise only with precoated sand sealing, in circular flow, precoated sand can be scattered out.
Core is by after this explained hereafter, and the surface quality in foundry goods runner is good, and cinder hole ratio obviously reduces, and product quality obtains and improves significantly.
The present invention still has numerous embodiments, all employing equivalents or equivalent transformation and all technical schemes formed, and all drops within protection scope of the present invention.
Claims (3)
1. a core-making method for turbine case runner core, is characterized in that: comprise the steps,
S1, on core shooter equipment, produce this core, the material of wherein said core is precoated sand, and hot box process parameter is solidification temperature: 250 ± 10 DEG C, shooting time: 4-5s, hardening time 140s;
S2, by penetrating sand mouth, greensand uncured in core to be outwelled by coremaking equipment turnover mould, forming cavity;
S3, fill out former silica sand by the cavity forming the core of cavity, and fill out consolidation;
S4, by with the precoated sand of material of the same race that adopts in S1 step and the absolute ethyl alcohol of 99.7% ethanol content mixed in the ratio of 5:1 after, the Sha Kou that penetrates of core is shut;
S5, the core sealing mouth are placed in baking oven, toast 1.5 hours, can use after the precoated sand solidification of sealing at 180 DEG C.
2. the core-making method of a kind of turbine case runner core according to claim 1, is characterized in that: described S2 can substitute by following steps,
Using air gun to be carried out blowing sky by greensand uncured in core by penetrating sand mouth, forming cavity.
3. the core-making method of a kind of turbine case runner core according to claim 1, is characterized in that: in described S3, is filled to penetrates sand mouth 10mm place and fill out consolidation with former silica sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510972506.3A CN105414488B (en) | 2015-12-23 | 2015-12-23 | A kind of core-making method of turbine case runner core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510972506.3A CN105414488B (en) | 2015-12-23 | 2015-12-23 | A kind of core-making method of turbine case runner core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105414488A true CN105414488A (en) | 2016-03-23 |
| CN105414488B CN105414488B (en) | 2017-10-27 |
Family
ID=55493272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510972506.3A Active CN105414488B (en) | 2015-12-23 | 2015-12-23 | A kind of core-making method of turbine case runner core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105414488B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107042285A (en) * | 2016-11-29 | 2017-08-15 | 常州中车汽车零部件有限公司 | A kind of manufacture method of turbine case runner loam core |
| CN107838391A (en) * | 2017-11-10 | 2018-03-27 | 西峡县众德汽车部件有限公司 | The preparation method of chill and chill |
| CN108044046A (en) * | 2018-02-01 | 2018-05-18 | 成都桐林铸造实业有限公司 | A kind of thermostatic type sand core drawn needle and precoated sand coremaking equipment |
| CN108296441A (en) * | 2018-03-01 | 2018-07-20 | 溧阳市联华机械制造有限公司 | A kind of hot core box mould and sand core forming method extending film covered sand core exhaust passage |
| CN108543917A (en) * | 2018-05-14 | 2018-09-18 | 南阳飞龙汽车零部件有限公司 | A method of solving heat resisting steel product cavity defect |
| CN110280722A (en) * | 2018-03-19 | 2019-09-27 | 科华控股股份有限公司 | A kind of production method of 3D printing turbine case runner core |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63264245A (en) * | 1987-04-20 | 1988-11-01 | Asahi Malleable Iron Co Ltd | Core for casting |
| JPH01237044A (en) * | 1988-03-18 | 1989-09-21 | Kao Corp | Method for foundry molding |
| JPH1076350A (en) * | 1996-08-30 | 1998-03-24 | Aisin Takaoka Ltd | Manufacture of shell core |
| JPH10166106A (en) * | 1996-12-06 | 1998-06-23 | Asahi Organic Chem Ind Co Ltd | Two-layer shell mold and manufacture thereof |
| US20080274374A1 (en) * | 2004-05-21 | 2008-11-06 | Kao Corporation | Resin-Coated Sand |
| CN201295740Y (en) * | 2008-11-20 | 2009-08-26 | 天津达祥精密工业有限公司 | Device for controlling core making and sand draining of box core |
-
2015
- 2015-12-23 CN CN201510972506.3A patent/CN105414488B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63264245A (en) * | 1987-04-20 | 1988-11-01 | Asahi Malleable Iron Co Ltd | Core for casting |
| JPH01237044A (en) * | 1988-03-18 | 1989-09-21 | Kao Corp | Method for foundry molding |
| JPH1076350A (en) * | 1996-08-30 | 1998-03-24 | Aisin Takaoka Ltd | Manufacture of shell core |
| JPH10166106A (en) * | 1996-12-06 | 1998-06-23 | Asahi Organic Chem Ind Co Ltd | Two-layer shell mold and manufacture thereof |
| US20080274374A1 (en) * | 2004-05-21 | 2008-11-06 | Kao Corporation | Resin-Coated Sand |
| CN201295740Y (en) * | 2008-11-20 | 2009-08-26 | 天津达祥精密工业有限公司 | Device for controlling core making and sand draining of box core |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107042285A (en) * | 2016-11-29 | 2017-08-15 | 常州中车汽车零部件有限公司 | A kind of manufacture method of turbine case runner loam core |
| CN107838391A (en) * | 2017-11-10 | 2018-03-27 | 西峡县众德汽车部件有限公司 | The preparation method of chill and chill |
| CN108044046A (en) * | 2018-02-01 | 2018-05-18 | 成都桐林铸造实业有限公司 | A kind of thermostatic type sand core drawn needle and precoated sand coremaking equipment |
| CN108296441A (en) * | 2018-03-01 | 2018-07-20 | 溧阳市联华机械制造有限公司 | A kind of hot core box mould and sand core forming method extending film covered sand core exhaust passage |
| CN110280722A (en) * | 2018-03-19 | 2019-09-27 | 科华控股股份有限公司 | A kind of production method of 3D printing turbine case runner core |
| CN108543917A (en) * | 2018-05-14 | 2018-09-18 | 南阳飞龙汽车零部件有限公司 | A method of solving heat resisting steel product cavity defect |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105414488B (en) | 2017-10-27 |
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Address after: 213011 No. 258 Wuyi Road, Jiangsu, Nantong, China Applicant after: CRRC CHANGZHOU AUTO PARTS CO.,LTD. Applicant after: CRRC QISHUYAN INSTITUTE Co.,Ltd. Address before: 213011 No. 258 Wuyi Road, Jiangsu, Nantong, China Applicant before: CHANGZHOU CSR AUTO PARTS Co.,Ltd. Applicant before: CRRC QISHUYAN INSTITUTE Co.,Ltd. |
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Address after: 213011 Wuyi Road, Jiangsu, Changzhou, No. 258 Co-patentee after: CRRC QISHUYAN INSTITUTE Co.,Ltd. Patentee after: CRRC CHANGZHOU AUTO PARTS CO.,LTD. Address before: 213011 No. 258 Wuyi Road, Jiangsu, Nantong, China Co-patentee before: CRRC QISHUYAN INSTITUTE Co.,Ltd. Patentee before: CRRC CHANGZHOU AUTO PARTS CO.,LTD. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 213011 258 Wuyi Road, Changzhou, Jiangsu Patentee after: CRRC CHANGZHOU AUTO PARTS CO.,LTD. Country or region after: China Patentee after: CRRC Qishuyan Locomotive and Rolling Stock Technology Research Institute Co.,Ltd. Address before: 213011 258 Wuyi Road, Changzhou, Jiangsu Patentee before: CRRC CHANGZHOU AUTO PARTS CO.,LTD. Country or region before: China Patentee before: CRRC QISHUYAN INSTITUTE Co.,Ltd. |