CN113976856A - Low-pressure casting method for improving air holes of auxiliary frame bushing - Google Patents
Low-pressure casting method for improving air holes of auxiliary frame bushing Download PDFInfo
- Publication number
- CN113976856A CN113976856A CN202111296959.0A CN202111296959A CN113976856A CN 113976856 A CN113976856 A CN 113976856A CN 202111296959 A CN202111296959 A CN 202111296959A CN 113976856 A CN113976856 A CN 113976856A
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- CN
- China
- Prior art keywords
- low
- pressure casting
- sand core
- bushing
- pressure
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- 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.)
- Pending
Links
- 238000005266 casting Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 4
- 239000004576 sand Substances 0.000 description 6
- 238000001723 curing Methods 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000001029 thermal curing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a low-pressure casting method for improving air holes of an auxiliary frame bushing.A low-pressure casting bottom die is provided with an inorganic sand core corresponding to a bushing through hole, and a vent plug is driven into the bottom surface of the inorganic sand core and is connected with a negative-pressure exhaust pipe; and opening negative pressure to exhaust air until the aluminum liquid is solidified when the low-pressure casting die is closed. By adopting the casting method, the air hole improvement of the bushing is reduced to be within 1 percent, the flaw detection yield is improved by more than 90 percent from the original 40 to 50 percent, and the stability is ensured.
Description
Technical Field
The invention relates to the field of casting of auxiliary frame bushings, in particular to a low-pressure casting method for improving air holes of an auxiliary frame bushing.
Background
With the development of the new energy automobile industry, over 2016, the well-jet type growth of new energy automobiles occurs, and the application of a large amount of aluminum-substituted steel automobile lightweight products in the automobile industry follows. In the casting process of the conventional auxiliary frame bushing, because the sand core generates gas after being heated, the gas can enter the bushing to form air holes, so that the casting quality is influenced (the X-RAY flaw detection grade of the auxiliary frame bushing hole is required to be within 2 grades).
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a low-pressure casting method for improving a vent hole of a subframe bushing.
In order to achieve the purpose, the invention adopts the following technical scheme:
a low-pressure casting method for improving air holes of an auxiliary frame bushing is characterized in that an inorganic sand core is placed on a low-pressure casting bottom die corresponding to a bushing through hole, an exhaust plug is driven into the bottom surface of the inorganic sand core, and the exhaust plug is connected with a negative-pressure exhaust pipe; and opening negative pressure to exhaust air until the aluminum liquid is solidified when the low-pressure casting die is closed.
Further, the vent plug is positioned in the center of the bottom surface of the inorganic sand core.
By adopting the technical scheme, the invention has the following beneficial technical effects: the inorganic sand core-making adopts the principle of thermocuring of the binder and the curing agent, and compared with the precoated sand core-making, the inorganic sand core-making has the advantages of no resin curing gas generation, green environmental protection, low gas generation, high sand core pore (sponge structure), easy collapsibility and the like. And negative pressure pumping is carried out while the low-pressure casting and die assembly is carried out, so that gas generated by heating the inorganic sand core is pumped away, and cannot enter the bushing to form air holes to influence the casting quality.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and the detailed description;
FIG. 1 is a schematic view of the low pressure casting method of the present invention.
Detailed Description
As shown in fig. 1, in the low-pressure casting method for improving the air holes of the auxiliary frame bushing, an inorganic sand core 2 is placed on a through hole of a low-pressure casting bottom die corresponding to a bushing 1, an exhaust plug 3 is driven into the center of the bottom surface of the inorganic sand core 2, and the exhaust plug 3 is connected with a negative pressure exhaust pipe 4; and when the low-pressure casting mold is closed, opening negative pressure to exhaust until aluminum liquid is solidified (about 1-3 MIN), and forming a riser 5 at the top of the inorganic sand core 2 in the casting process.
The inorganic sand core-making adopts the principle of thermocuring of the binder and the curing agent, and compared with the precoated sand core-making, the inorganic sand core-making has the advantages of no resin curing gas generation, green environmental protection, low gas generation, high sand core pore (sponge structure), easy collapsibility and the like. And negative pressure pumping is carried out while the low-pressure casting and die assembly is carried out, so that gas generated by heating the inorganic sand core is pumped away, and cannot enter the bushing to form air holes to influence the casting quality.
By adopting the casting method, the air hole improvement of the lining is reduced to be within 1 percent, the flaw detection yield is improved by more than 90 percent from the original 40 to 50 percent, the stability is ensured, and the requirement within 2 grades of X-RAY flaw detection is met.
While the invention has been described in connection with the above embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, which are illustrative and not restrictive, and that those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (2)
1. The utility model provides a sub vehicle frame bush improves low pressure casting method of gas pocket which characterized in that: placing an inorganic sand core on the through hole of the corresponding bushing of the low-pressure casting bottom die, and driving an exhaust plug into the bottom surface of the inorganic sand core, wherein the exhaust plug is connected with a negative-pressure exhaust pipe; and opening negative pressure to exhaust air until the aluminum liquid is solidified when the low-pressure casting die is closed.
2. The method of claim 1, wherein the step of low pressure casting the subframe bushing to improve porosity comprises the steps of: the exhaust plug is positioned in the center of the bottom surface of the inorganic sand core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111296959.0A CN113976856A (en) | 2021-10-29 | 2021-10-29 | Low-pressure casting method for improving air holes of auxiliary frame bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111296959.0A CN113976856A (en) | 2021-10-29 | 2021-10-29 | Low-pressure casting method for improving air holes of auxiliary frame bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113976856A true CN113976856A (en) | 2022-01-28 |
Family
ID=79746304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111296959.0A Pending CN113976856A (en) | 2021-10-29 | 2021-10-29 | Low-pressure casting method for improving air holes of auxiliary frame bushing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113976856A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006058123A1 (en) * | 2006-12-09 | 2008-06-19 | Mahle International Gmbh | Form body for the production of a cylindrical inner space of a blind hole cylinder, is formed as a sand core, which is covered with a size |
| CN204365982U (en) * | 2014-12-30 | 2015-06-03 | 新兴重工湖北三六一一机械有限公司 | A kind of bleeding and use exhaust apparatus for the exhaust of aluminium alloy casting mould core |
| CN106799469A (en) * | 2017-02-10 | 2017-06-06 | 重庆大学 | A kind of permanent mold casting compound core and preparation method thereof |
| CN108057873A (en) * | 2018-01-26 | 2018-05-22 | 共享智能铸造产业创新中心有限公司 | The process of low pressure casting thin-walled aluminium alloy castings |
| CN210475409U (en) * | 2019-09-09 | 2020-05-08 | 湖北航特装备制造股份有限公司 | Inorganic psammitolite mould of sub vehicle frame before electric motor car |
| CN212371113U (en) * | 2019-12-27 | 2021-01-19 | 万向钱潮股份有限公司 | Novel sand core easy to crush, less in sand adhesion and good in casting performance |
-
2021
- 2021-10-29 CN CN202111296959.0A patent/CN113976856A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006058123A1 (en) * | 2006-12-09 | 2008-06-19 | Mahle International Gmbh | Form body for the production of a cylindrical inner space of a blind hole cylinder, is formed as a sand core, which is covered with a size |
| CN204365982U (en) * | 2014-12-30 | 2015-06-03 | 新兴重工湖北三六一一机械有限公司 | A kind of bleeding and use exhaust apparatus for the exhaust of aluminium alloy casting mould core |
| CN106799469A (en) * | 2017-02-10 | 2017-06-06 | 重庆大学 | A kind of permanent mold casting compound core and preparation method thereof |
| CN108057873A (en) * | 2018-01-26 | 2018-05-22 | 共享智能铸造产业创新中心有限公司 | The process of low pressure casting thin-walled aluminium alloy castings |
| CN210475409U (en) * | 2019-09-09 | 2020-05-08 | 湖北航特装备制造股份有限公司 | Inorganic psammitolite mould of sub vehicle frame before electric motor car |
| CN212371113U (en) * | 2019-12-27 | 2021-01-19 | 万向钱潮股份有限公司 | Novel sand core easy to crush, less in sand adhesion and good in casting performance |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220128 |