CN113059124A - Preparation method of mold core of closed twisted blade - Google Patents
Preparation method of mold core of closed twisted blade Download PDFInfo
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- CN113059124A CN113059124A CN202110341404.7A CN202110341404A CN113059124A CN 113059124 A CN113059124 A CN 113059124A CN 202110341404 A CN202110341404 A CN 202110341404A CN 113059124 A CN113059124 A CN 113059124A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000000956 alloy Substances 0.000 claims abstract description 7
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 7
- 238000010586 diagram Methods 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 7
- 238000003754 machining Methods 0.000 claims abstract description 4
- 239000004576 sand Substances 0.000 claims description 10
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 6
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000001680 brushing effect Effects 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 238000007605 air drying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- B22C9/103—Multipart cores
-
- 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
- B22C7/06—Core boxes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a core preparation method of a closed twisted blade, which comprises the following steps: a. firstly, modeling design model of impeller is carried out on a product diagram; b. after the step a is finished, adding blank allowance and hole filling (hub) to the product according to the technical requirements of machining, and performing shrinkage rate treatment according to the type of the impeller alloy to prepare a blank A; c. and c, after the step b is finished, carrying out rotary modeling on the outer contour line of the blank in the blank A to produce a solid model. The invention aims to provide a combined impeller sand core for casting production of an impeller, the sand core has the characteristics that the blade profile structure completely meets the design requirement, the size precision is high, the surface is smooth, and due to the combined sand core, the air is smoothly exhausted through a combined surface in the pouring process, the defects of insufficient blade pouring and cold shut are avoided, waste products are reduced, and a cast impeller with excellent performance is obtained, so that the resistance of a pump is reduced, and the efficiency of the pump is improved.
Description
Technical Field
The invention relates to the technical field of casting processes, in particular to a method for preparing a core of a closed twisted blade.
Background
The impeller is an important working part of the pump, and is the heart of the pump. The closed impeller consists of front cover, back cover and blades, and the blades are sandwiched between the front and back cover layers and have twisted rotating structure. When the impeller is cast, the blade needs to be formed by a sand core, and the quality of the sand core directly influences the working efficiency and the service life of the pump.
The traditional core making process is that an independent metallic blade and front and rear cover plate models are processed firstly, the blade is fixed on the rear cover plate during core making, when the blade is taken out of a sand mold, the blade is influenced by a curved surface structure, the curved surface structure is seriously deformed, the wall thickness is increased, the structure is approximately planar, the shape of the blade is greatly different from the shape of the blade required by the design, the surface roughness value is large, and the blade is thin and rotates, so that the surface roughness value cannot be reduced by brushing paint, the resistance of water is increased during use, and the static balance efficiency and the service life of a pump are influenced; meanwhile, the integral sand core is difficult to exhaust in the casting process, so that the blade is easy to be insufficiently cast, cold shut is caused, and waste products are caused.
Disclosure of Invention
The invention aims to provide a method for preparing a core of a closed twisted blade, which solves the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a method for preparing a core of a closed twisted blade comprises the following steps:
a. firstly, modeling design model of impeller is carried out on a product diagram;
b. after the step a is finished, adding blank allowance and hole filling (hub) to the product according to the technical requirements of machining, and performing shrinkage rate treatment according to the type of the impeller alloy to prepare a blank A;
c. after the step B is finished, carrying out rotary modeling on the outer contour line of the blank in the blank A to produce a solid model, and adding core heads at the inlet end and the outlet end of the model and carrying out Boolean intersection operation to prepare a blank B;
d. after the step C is finished, equally dividing the blank B into area blocks (each block comprises the front and back of the curved surface of the blade) corresponding to the number of the blades along the blade forming area to prepare a blank C;
e. after the step d is finished, performing hot core box design and vertical parting on the blank C by taking the blank C as an entity, and designing the positions of the heating pipes, the ejection mechanisms and the like;
f. after the step e is finished, making a film-coated sand core on the core shooting machine by using the hot core box made in the step e, and making a finished product;
g. after the step f is finished, cleaning sand at a sand shooting opening of the finished product, brushing refined high-temperature-resistant coating on the surface, checking that no nodules are formed, and baking in a blast drying oven;
h. and g, after the step g is finished, combining the baked sand cores according to the number, and fastening the sand cores at the outlet end core print and the inlet two ends core print by iron wires for standby application.
In a preferred embodiment of the present invention, the modeling design model in step a is UG modeling software.
In a preferred embodiment of the present invention, the shrinkage rate of the alloy for the impeller in the step b is 0.5 to 1.5%.
As a preferred embodiment of the present invention, the specific method of halving in step b is to rotate the ridge line of the inlet ends of two adjacent blades by a proper angle along the axis, intersect and divide with the bisector plane passing through the axis, and the outlet end is also the same, when the sand core is combined, the inlet end is positioned in the vertical direction, and the outlet end is positioned in the circumferential direction, so as to ensure the accurate size of the combined sand core.
As a preferred embodiment of the present invention, the boolean intersection operation in step c includes: firstly, a right key is arranged on a part needing Boolean operation, and the key is set as an operation part, and on a UG menu: the method comprises the steps of stabbing-correlation simulation-WAVE link device commands, seeing WAVE link types in a popup window, selecting [ body ], then selecting two or more parts which are required to be Boolean, clicking [ application ], and running an intersection command to perform Boolean operation.
As a preferred embodiment of the present invention, the core shooter in step f is a horizontal parting and box-releasing shooting and pressing molding machine, and the core making process includes the steps of shooting a core-sand mixture using a liquid or solid thermosetting resin as a binder into a heated core box, and taking out the core after the core is preheated in the core box and quickly hardened to a certain thickness (about 5-10 mm).
In a preferred embodiment of the invention, the forced air drying oven in the step g is a vertical forced air drying oven, the temperature of the finished product during baking is 100-150 ℃, and the baking time is 1-1.5 h.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention aims to provide a combined impeller sand core for casting production of an impeller, the sand core has the characteristics that the blade profile structure completely meets the design requirement, the size precision is high, the surface is smooth, and due to the combined sand core, the air is smoothly exhausted through a combined surface in the pouring process, the defects of insufficient blade pouring and cold shut are avoided, waste products are reduced, and a cast impeller with excellent performance is obtained, so that the resistance of a pump is reduced, and the efficiency of the pump is improved.
2. The core box manufactured by the invention has the advantages of simple structure, low manufacturing cost, convenient sand core production operation, high production efficiency, universal sand core, convenient finishing and good surface quality, and the impeller blade at the production position of the impeller sand core obtained by the method is smooth, accurate in size, low in noise in use, high in efficiency and long in service life.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a diagram of an impeller product of the present invention;
FIG. 2 is a process diagram of the impeller of the present invention;
FIG. 3 is a view of the inlet and outlet end addition cores of the mold of the present invention;
FIG. 4 is a diagram illustrating the result of Boolean differencing operations of FIGS. 2 and 3 according to the present invention;
FIG. 5 is a front and back view of a curved surface of a blade of the present invention;
FIG. 6 is a drawing of a finished part of the present invention;
FIG. 7 is a view showing the arrangement of the sand cores of the present invention.
In the figure: 1. a front cover plate; 2. a blade; 3. a rear cover plate; .
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-7, the present invention provides a technical solution: a method for preparing a core of a closed twisted blade comprises the following steps:
a. firstly, modeling design model of impeller is carried out on a product diagram, and reference is made to fig. 1;
b. after the step a is finished, adding blank allowance and hole filling (hub) to the product according to the technical requirements of machining, and performing shrinkage rate treatment according to the type of the impeller alloy to prepare a blank A, and referring to fig. 2;
c. after the step B is finished, carrying out rotary modeling on the outer contour line of the blank in the blank A to produce a solid model, adding core heads at the inlet end and the outlet end of the model, and carrying out Boolean intersection operation to prepare a blank B, and referring to fig. 3;
d. after the step C is finished, equally dividing the blank B into area blocks (each block comprises the front and back of the curved surface of the blade) corresponding to the number of the blades along the blade forming area to prepare a blank C, and referring to fig. 3;
e. after the step d is finished, performing hot core box design and vertical parting on the blank C by taking the blank C as an entity, and designing the positions of the heating pipes, the ejection mechanism and the like, referring to fig. 4;
f. after the step e is finished, making a film-coated sand core on the core shooting machine by using the hot core box made in the step e, and making a finished product, wherein the step e is shown in fig. 5;
g. after the step f is finished, cleaning sand at a sand shooting opening of the finished product, brushing refined high-temperature-resistant coating on the surface, checking that no nodules are formed, and baking in a blast drying oven, referring to fig. 6;
h. and g, after the step g is finished, combining the baked sand cores according to the number, and fastening the sand cores at the outlet end core print and the inlet two-end core print by iron wires for standby application respectively, and referring to fig. 7.
It should be noted that, UG modeling software is used for modeling the design model in step a.
In step b, the shrinkage of the alloy for the impeller is 0.5 to 1.5%.
It should be noted that, the specific method of halving in step b is to rotate the inlet end ridgeline of two adjacent blades by a proper angle along the axis, intersect and divide with the bisector passing through the axis, and the outlet end is also the same, and when the sand core is combined, the inlet end is positioned in the vertical direction, and the outlet end is positioned in the circumferential direction, so as to ensure the accurate size of the combined sand core.
It should be noted that the boolean intersection operation in step c includes: firstly, a right key is arranged on a part needing Boolean operation, and the key is set as an operation part, and on a UG menu: the method comprises the steps of stabbing-correlation simulation-WAVE link device commands, seeing WAVE link types in a popup window, selecting [ body ], then selecting two or more parts which are required to be Boolean, clicking [ application ], and running an intersection command to perform Boolean operation.
The core shooting machine in the step f is a horizontal parting and box-stripping injection molding machine, when the sand core is manufactured, a core-sand mixture which takes liquid or solid thermosetting resin as a binder is injected into a heated core box, and the sand core is taken out after being preheated in the core box and quickly hardened to a certain thickness (about 5-10 mm).
And d, in the step g, the air drying oven adopts a time-vertical air drying oven, the temperature of the finished product is 100-150 ℃, and the baking time is 1-1.5 h.
Conventional closed twisted blade data parameters table 1 is as follows:
| test items | Resistance to pump | Smoothness of the surface | Accuracy of measurement | Service life |
| Parameter index | Is larger | In general | Good effect | Is longer |
Example a closed twisted blade data table 2 is as follows:
| test items | Resistance to pump | Smoothness of the surface | Accuracy of measurement | Service life |
| Parameter index | In general | Good effect | Is higher than | Good effect |
Example two closed twisted blade data table 3 is as follows:
| test items | Resistance to pump | Smoothness of the surface | Accuracy of measurement | Service life |
| Parameter index | Is smaller | Height of | Height of | Long and long |
In summary, the invention aims to provide a combined impeller sand core for the casting production of an impeller, the sand core has the characteristics that the blade profile structure completely meets the design requirement, the size precision is high, the surface is smooth, and due to the combined sand core, the air is smoothly exhausted through the combined surface in the casting process, the defects of insufficient blade casting and cold shut are avoided, waste products are reduced, and the cast impeller with excellent performance is obtained, so that the resistance of a pump is reduced, and the efficiency of the pump is improved.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A preparation method of a core of a closed twisted blade is characterized by comprising the following steps: the core preparation steps are as follows:
a. firstly, modeling design model of impeller is carried out on a product diagram;
b. after the step a is finished, adding blank allowance and hole filling (hub) to the product according to the technical requirements of machining, and performing shrinkage rate treatment according to the type of the impeller alloy to prepare a blank A;
c. after the step B is finished, carrying out rotary modeling on the outer contour line of the blank in the blank A to produce a solid model, and adding core heads at the inlet end and the outlet end of the model and carrying out Boolean intersection operation to prepare a blank B;
d. after the step C is finished, equally dividing the blank B into area blocks (each block comprises the front and back of the curved surface of the blade) corresponding to the number of the blades along the blade forming area to prepare a blank C;
e. after the step d is finished, performing hot core box design and vertical parting on the blank C by taking the blank C as an entity, and designing the positions of the heating pipes, the ejection mechanisms and the like;
f. after the step e is finished, making a film-coated sand core on the core shooting machine by using the hot core box made in the step e, and making a finished product;
g. after the step f is finished, cleaning sand at a sand shooting opening of the finished product, brushing refined high-temperature-resistant coating on the surface, checking that no nodules are formed, and baking in a blast drying oven;
h. and g, after the step g is finished, combining the baked sand cores according to the number, and fastening the sand cores at the outlet end core print and the inlet two ends core print by iron wires for standby application.
2. The method for preparing the core of the closed twisted blade according to claim 1, wherein the method comprises the following steps: and (c) adopting UG modeling software for modeling design models in the step a.
3. The method for preparing the core of the closed twisted blade according to claim 1, wherein the method comprises the following steps: and the shrinkage rate of the impeller alloy in the step b is 0.5-1.5%.
4. The method for preparing the core of the closed twisted blade according to claim 1, wherein the method comprises the following steps: and c, rotating the inlet end ridgelines of two adjacent blades by a proper angle along the axis, intersecting and dividing the inlet end ridgelines with an bisecting plane passing through the axis, and positioning the inlet end in the vertical direction and positioning the outlet end in the circumferential direction when the sand cores are combined to ensure the accurate size of the combined sand cores.
5. The method for preparing the core of the closed twisted blade according to claim 1, wherein the method comprises the following steps: the Boolean intersection operation in the step c comprises the following steps: firstly, a right key is arranged on a part needing Boolean operation, and the key is set as an operation part, and on a UG menu: the method comprises the steps of stabbing-correlation simulation-WAVE link device commands, seeing WAVE link types in a popup window, selecting [ body ], then selecting two or more parts which are required to be Boolean, clicking [ application ], and running an intersection command to perform Boolean operation.
6. The method for preparing the core of the closed twisted blade according to claim 1, wherein the method comprises the following steps: and f, adopting a horizontal parting and box-removing injection molding machine as the core shooting machine in the step f, and when the sand core is manufactured, shooting a core-sand mixture which takes liquid or solid thermosetting resin as a binder into a heated core box, and taking out the core after the sand core is preheated in the core box and quickly hardened to a certain thickness (about 5-10 mm).
7. The method for preparing the core of the closed twisted blade according to claim 1, wherein the method comprises the following steps: and g, adopting a time-vertical air-blast drying oven in the step g, wherein the baking temperature of the finished product is 100-150 ℃, and the baking time is 1-1.5 h.
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| CN202110341404.7A CN113059124A (en) | 2021-03-30 | 2021-03-30 | Preparation method of mold core of closed twisted blade |
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| CN202110341404.7A CN113059124A (en) | 2021-03-30 | 2021-03-30 | Preparation method of mold core of closed twisted blade |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116851651A (en) * | 2023-08-15 | 2023-10-10 | 无锡锡南科技股份有限公司 | Motor casing combined type air passage core and core manufacturing method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11239843A (en) * | 1998-02-23 | 1999-09-07 | Ebara Corp | Core for casting |
| CN101745603A (en) * | 2009-12-28 | 2010-06-23 | 临沂蒙凌铸钢有限公司 | Core making technology of Furan resin sand casting steel car axle casing |
| CN104014738A (en) * | 2014-05-28 | 2014-09-03 | 东风商用车有限公司 | Combined core for casting tiny channels and application method thereof |
| CN205967283U (en) * | 2016-08-31 | 2017-02-22 | 玉田县永信机械制造有限公司 | Immersible pump impeller blade casting tectorial membrane sand combination model |
| CN107199311A (en) * | 2017-06-08 | 2017-09-26 | 西安工业大学 | A kind of combination is towards turbo blade rapid shaping and the molten mistake fusible pattern method of model casting |
| CN109175262A (en) * | 2018-11-16 | 2019-01-11 | 襄阳五二五泵业有限公司 | A kind of production method of combination type blade wheel sand core |
| CN110102711A (en) * | 2019-04-11 | 2019-08-09 | 兰州兰石集团有限公司铸锻分公司 | The manufacturing method of steel-casting moulding process casting mold |
-
2021
- 2021-03-30 CN CN202110341404.7A patent/CN113059124A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11239843A (en) * | 1998-02-23 | 1999-09-07 | Ebara Corp | Core for casting |
| CN101745603A (en) * | 2009-12-28 | 2010-06-23 | 临沂蒙凌铸钢有限公司 | Core making technology of Furan resin sand casting steel car axle casing |
| CN104014738A (en) * | 2014-05-28 | 2014-09-03 | 东风商用车有限公司 | Combined core for casting tiny channels and application method thereof |
| CN205967283U (en) * | 2016-08-31 | 2017-02-22 | 玉田县永信机械制造有限公司 | Immersible pump impeller blade casting tectorial membrane sand combination model |
| CN107199311A (en) * | 2017-06-08 | 2017-09-26 | 西安工业大学 | A kind of combination is towards turbo blade rapid shaping and the molten mistake fusible pattern method of model casting |
| CN109175262A (en) * | 2018-11-16 | 2019-01-11 | 襄阳五二五泵业有限公司 | A kind of production method of combination type blade wheel sand core |
| CN110102711A (en) * | 2019-04-11 | 2019-08-09 | 兰州兰石集团有限公司铸锻分公司 | The manufacturing method of steel-casting moulding process casting mold |
Non-Patent Citations (1)
| Title |
|---|
| 姚建国等: "CAD/CAM/CAE/PDM技术开发与创新 \'2000 UGS中国用户论文集", vol. 1, 东南大学出版社, pages: 64 - 66 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116851651A (en) * | 2023-08-15 | 2023-10-10 | 无锡锡南科技股份有限公司 | Motor casing combined type air passage core and core manufacturing method |
| CN116851651B (en) * | 2023-08-15 | 2024-02-23 | 无锡锡南科技股份有限公司 | Motor casing combined type air passage core and core manufacturing method |
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Application publication date: 20210702 |